Pub Date : 2024-04-17DOI: 10.1088/1674-1137/ad3f95
Mingjian Zhang, Li Chen, Maoyou Yang, Junmei Wang
In this paper, we construct ten dark energy models to test whether they can reconcile the Hubble tension and how much is it affected by parameterization. To provide a fair test, the models are rich including fractional form, logarithm form, exponential form, inverse exponential form and several non-parameterized models. The dataset we use are the NPIPE pipeline of cosmic microwave background (CMB) power-spectrum data from pl2020, Pantheon+ samples from Supernovae Type Ia, and baryon acoustic oscillation. They MCMC calculation implies the dark energy transferring from $w< -1$ to $w > -1$, for the four parameterized dark energy models. However, they are unable to reconcile the Hubble tension well. Importantly, we find that the phantom-like dark energy with $w < -1$ best can reduce the Hubble tension to $0.1808sigma$. However, the AIC analysis indicates that this alleviation is at the cost of high AIC. We also investigate the effect of constructions on the derivative of equation of state $dw/da$, cosmic density parameter, CMB power spectrum $C^{TT}$ and matter spectra $P(k)$. We also find that Hubble tension may be related to the reionization process.
{"title":"Whether the late dark energy parameterization can reconcile the Hubble tension?","authors":"Mingjian Zhang, Li Chen, Maoyou Yang, Junmei Wang","doi":"10.1088/1674-1137/ad3f95","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3f95","url":null,"abstract":"\u0000 In this paper, we construct ten dark energy models to test whether they can reconcile the Hubble tension and how much is it affected by parameterization. To provide a fair test, the models are rich including fractional form, logarithm form, exponential form, inverse exponential form and several non-parameterized models. The dataset we use are the NPIPE pipeline of cosmic microwave background (CMB) power-spectrum data from pl2020, Pantheon+ samples from Supernovae Type Ia, and baryon acoustic oscillation. They MCMC calculation implies the dark energy transferring from $w< -1$ to $w > -1$, for the four parameterized dark energy models. However, they are unable to reconcile the Hubble tension well. Importantly, we find that the phantom-like dark energy with $w < -1$ best can reduce the Hubble tension to $0.1808sigma$. However, the AIC analysis indicates that this alleviation is at the cost of high AIC. We also investigate the effect of constructions on the derivative of equation of state $dw/da$, cosmic density parameter, CMB power spectrum $C^{TT}$ and matter spectra $P(k)$. We also find that Hubble tension may be related to the reionization process.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":" 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140691767","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-16DOI: 10.1088/1674-1137/ad3efe
B. Pang, Jiang Liu, Yang Zhang
Neutrinos from core-collapse supernovae are essential for the understanding of neutrino physics and stellar evolution. The dual-phase xenon dark matter detectors can provide a way to track explosions of galactic supernovae by detecting neutrinos through coherent elastic neutrino-nucleus scatterings. In this study, a variation of progenitor masses as well as explosion models are assumed to predict the neutrino fluxes and spectra, which result in the number of expected neutrino events ranging from 6.6 to 13.7 at a distance of 10 kpc over a 10-second duration with negligible backgrounds at PandaX-4T. Two specialized triggering alarms for monitoring supernova burst neutrinos are built. The efficiency of detecting supernova explosions at various distances in the Milky Way is estimated. These alarms will be implemented in the real-time supernova monitoring system at PandaX-4T in the near future, providing the astronomical communities with supernova early warnings. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
{"title":"Detecting Neutrinos from Supernova Bursts in PandaX-4T","authors":"B. Pang, Jiang Liu, Yang Zhang","doi":"10.1088/1674-1137/ad3efe","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3efe","url":null,"abstract":"\u0000 Neutrinos from core-collapse supernovae are essential for the understanding of neutrino physics and stellar evolution. The dual-phase xenon dark matter detectors can provide a way to track explosions of galactic supernovae by detecting neutrinos through coherent elastic neutrino-nucleus scatterings. In this study, a variation of progenitor masses as well as explosion models are assumed to predict the neutrino fluxes and spectra, which result in the number of expected neutrino events ranging from 6.6 to 13.7 at a distance of 10 kpc over a 10-second duration with negligible backgrounds at PandaX-4T. Two specialized triggering alarms for monitoring supernova burst neutrinos are built. The efficiency of detecting supernova explosions at various distances in the Milky Way is estimated. These alarms will be implemented in the real-time supernova monitoring system at PandaX-4T in the near future, providing the astronomical communities with supernova early warnings. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"4 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140695125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Possible light bosonic dark matter interactions with the Standard Model photon have been searched by microwave resonant cavities. In this paper, we demonstrate the cryogenic readout system calibration of a 7.138 GHz copper cavity with a loaded quality factor $Q_l=10^4$, operated at 22 mK temperature based on a dilution refrigerator. Our readout system consists of High Electron Mobility Transistors as cryogenic amplifiers at 4 K, plus room-temperature amplifiers and a spectrum analyzer for signal power detection. We test the system with a superconducting two-level system as a single-photon source in the microwave frequency regime and report an overall 95.6 dB system gain and -71.4 dB attenuation in the cavity's input channel. The effective noise temperature of the measurement system is 7.5 K. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
{"title":"Calibration of the Cryogenic Measurement System of a Resonant Haloscope Cavity","authors":"Dong He, Jie Fan, Xin Gao, Yu Gao, Nick Houston, Z. Ji, Yirong Jin, Chuang Li, Jinmian Li, Tianjun Li, Shi-hang Liu, Jia-Shu Niu, Zhihui Peng, Liang Sun, Zheng Sun, Jia Wang, Puxian Wei, Lina Wu, Zhongchen Xiang, Qiao-Qiao Yang, Chi Zhang, Wenxing Zhang, Xin Zhang, Dongning Zheng, Ruifeng Zheng, Jianhua Zhou","doi":"10.1088/1674-1137/ad4267","DOIUrl":"https://doi.org/10.1088/1674-1137/ad4267","url":null,"abstract":"\u0000 Possible light bosonic dark matter interactions with the Standard Model photon have been searched by microwave resonant cavities. In this paper, we demonstrate the cryogenic readout system calibration of a 7.138 GHz copper cavity with a loaded quality factor $Q_l=10^4$, operated at 22 mK temperature based on a dilution refrigerator. Our readout system consists of High Electron Mobility Transistors as cryogenic amplifiers at 4 K, plus room-temperature amplifiers and a spectrum analyzer for signal power detection. We test the system with a superconducting two-level system as a single-photon source in the microwave frequency regime and report an overall 95.6 dB system gain and -71.4 dB attenuation in the cavity's input channel. The effective noise temperature of the measurement system is 7.5 K. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"7 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140697949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-16DOI: 10.1088/1674-1137/ad3eff
Chao Zhang, Tao Zhu
The Horndeski theory gives the most general model of scalar-tensor theories. It draws a lot of attentions in recent years on its black holes, celestial dynamics, stability analysis, etc. It is important to notice that, for certain subclasses of Horndeski models, one can obtain analytic solutions to the background fields. This provides us with a good opportunity to investigate the corresponding stability problems in details. Specially, we may find out the constraints to the model or theory, under which the stability conditions can be satisfied. In this paper, we focus on a subclass of the Horndeski theory and a set of analytic background solutions are considered. On top of that, the odd-parity gravitational perturbation and the 2nd-order Lagrangian are investigated. With careful analysis, the instability is identified within the neighborhood of the event horizon. We are thus able to exclude a specific geometry for the model. It is interesting to notice that, such an instability is implanted in the structure of the corresponding Lagrangian, and will not be erased by simply adding numerical constraints on the coupling parameters. As a starting point of our research, this current work provides insights into further exploration of Horndeski theories.
{"title":"Linear instability of hairy black holes in Horndeski theory","authors":"Chao Zhang, Tao Zhu","doi":"10.1088/1674-1137/ad3eff","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3eff","url":null,"abstract":"\u0000 The Horndeski theory gives the most general model of scalar-tensor theories. It draws a lot of attentions in recent years on its black holes, celestial dynamics, stability analysis, etc. It is important to notice that, for certain subclasses of Horndeski models, one can obtain analytic solutions to the background fields. This provides us with a good opportunity to investigate the corresponding stability problems in details. Specially, we may find out the constraints to the model or theory, under which the stability conditions can be satisfied. In this paper, we focus on a subclass of the Horndeski theory and a set of analytic background solutions are considered. On top of that, the odd-parity gravitational perturbation and the 2nd-order Lagrangian are investigated. With careful analysis, the instability is identified within the neighborhood of the event horizon. We are thus able to exclude a specific geometry for the model. It is interesting to notice that, such an instability is implanted in the structure of the corresponding Lagrangian, and will not be erased by simply adding numerical constraints on the coupling parameters. As a starting point of our research, this current work provides insights into further exploration of Horndeski theories.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"7 22","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140697666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-15DOI: 10.1088/1674-1137/ad3e67
M. K. Jasim, S. Maurya, Abdelghani Errehymy, A. Jassim, K. Nisar, A. Abdel‐Aty
This paper focuses on investigating the physical properties and predicted radii of compact stars generated by Tolman--IV complexity-free model within the background of modified gravity theory, especially $f(mathcal{R},T)$-gravity theory, under complexity formalism for a spherically symmetric spacetime proposed by L. Herrera [Phys Rev D 97: 044010, 2018]. By solving the resulting set of differential equations, the explicit forms of the energy-momentum (EM) tensor components, including the density, radial pressure and tangential pressure, are obtained. The influence of the parameter $chi$ on various physical properties of the star has been thoroughly investigated. The model undergoes a series of rigorous tests to determine its physical relevance. The findings indicate that the model exhibits regularity, stability and features a surface with vanishing pressure. The boundary of this surface is determined by carefully selecting the parameter space. The complexity method employed in $f(mathcal{R},T)$ gravity offers an interesting approach for developing astrophysical models that are consistent with observable events as demonstrated by recent experiments. In this regard, we present a study that uses observational data from the GW190814 event, detected by the LIGO and Virgo observatories, to investigate the validity of the Tolman-IV model in $f(R, T)$ gravity. The analysis includes comparing the model's predictions with the observed characteristics of the compact object involved in the merger. In addition, data from two-millisecond pulsars, PSR J1614-2230 and PSR J0952-0607, are incorporated to further constrain theoretical theories. However, we present a diagram illustrating the relationship between the total mass and radius of the compact object candidates for different values of a parameter $chi$.
本文主要研究在L. Herrera提出的球对称时空复杂性形式主义下，修正引力理论，特别是$f(mathcal{R},T)$引力理论背景下，托尔曼--IV无复杂性模型产生的紧凑恒星的物理性质和预测半径[Phys Rev D 97: 044010, 2018]。通过求解得到的微分方程组，可以得到能量-动量（EM）张量分量的显式形式，包括密度、径向压力和切向压力。参数 $chi$ 对恒星各种物理性质的影响也得到了深入研究。该模型经过了一系列严格测试，以确定其物理相关性。研究结果表明，该模型具有规则性和稳定性，并有一个压力消失的表面。这个曲面的边界是通过精心选择参数空间确定的。在$f(mathcal{R},T)$引力中采用的复杂性方法为建立与近期实验所证明的可观测事件相一致的天体物理模型提供了一种有趣的方法。为此，我们利用 LIGO 和室女座天文台探测到的 GW190814 事件的观测数据，研究了 $f(R, T)$ 引力中托尔曼-IV 模型的有效性。分析包括比较该模型的预测值与所观测到的参与合并的紧凑天体的特征。此外，我们还纳入了 PSR J1614-2230 和 PSR J0952-0607 这两颗毫秒脉冲星的数据，以进一步约束理论。不过，我们给出了一张图，说明了不同参数值$chi$下候选紧凑天体的总质量和半径之间的关系。
{"title":"Physical properties and maximum allowable mass-radius relation of complexity-free compact stellar objects within modified $f(R,T)$ gravity formalism","authors":"M. K. Jasim, S. Maurya, Abdelghani Errehymy, A. Jassim, K. Nisar, A. Abdel‐Aty","doi":"10.1088/1674-1137/ad3e67","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3e67","url":null,"abstract":"\u0000 This paper focuses on investigating the physical properties and predicted radii of compact stars generated by Tolman--IV complexity-free model within the background of modified gravity theory, especially $f(mathcal{R},T)$-gravity theory, under complexity formalism for a spherically symmetric spacetime proposed by L. Herrera [Phys Rev D 97: 044010, 2018]. By solving the resulting set of differential equations, the explicit forms of the energy-momentum (EM) tensor components, including the density, radial pressure and tangential pressure, are obtained. The influence of the parameter $chi$ on various physical properties of the star has been thoroughly investigated. The model undergoes a series of rigorous tests to determine its physical relevance. The findings indicate that the model exhibits regularity, stability and features a surface with vanishing pressure. The boundary of this surface is determined by carefully selecting the parameter space. The complexity method employed in $f(mathcal{R},T)$ gravity offers an interesting approach for developing astrophysical models that are consistent with observable events as demonstrated by recent experiments. In this regard, we present a study that uses observational data from the GW190814 event, detected by the LIGO and Virgo observatories, to investigate the validity of the Tolman-IV model in $f(R, T)$ gravity. The analysis includes comparing the model's predictions with the observed characteristics of the compact object involved in the merger. In addition, data from two-millisecond pulsars, PSR J1614-2230 and PSR J0952-0607, are incorporated to further constrain theoretical theories. However, we present a diagram illustrating the relationship between the total mass and radius of the compact object candidates for different values of a parameter $chi$.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"43 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140699408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-12DOI: 10.1088/1674-1137/ad3ddd
Yan-Ju Zhang, Jin-Long Chang, Tai-Gang Liu
Vectorlike quarks~(VLQs) with masses at the TeV-scale have been predicted in many new physics scenarios beyond the Standard Model~(SM). Based on a simplified $left(X,Tright)$ doublet model including the exotic vectorlike $X$ quark~(VLQ-$X$) with electric charge $5/3$, we study the production of the VLQ-$X$ decaying into $tW$ at the future Compact Linear Collider~(CLIC) with $sqrt{s}=3$ TeV including the initial state radiation and beamstrahlung effects. We focus on the final signals including same-sign dilepton~(electrons or muons), at least one $b$-tagged jet and large missing transverse momentum. By performing a detailed signal-to-background analyses and detector simulations, we obtain the $2sigma$ exclusion capabilities and the $5sigma$ discovery reaches, respectively, on the mass of VLQ-$X$ $m_{X}$ and the relevant parameters~($Br(Xto tW)$ for $m_{X}<1500$~GeV and the coupling strength $g^{*}$ for $m_{X}geq1500$~GeV) for some typical luminosities at 3 TeV CLIC.
在许多超越标准模型（SM）的新物理情景中，都预言了质量达到TeV尺度的矢量类夸克（VLQs）。基于一个简化的$left(X,Tright)$双元模型，包括电荷为5/3$的奇异矢量类$X$夸克~（VLQ-$X$），我们研究了在未来的紧凑线性对撞机~（CLIC）上衰变为$tW$的VLQ-$X$的产生，其衰变速率为$sqrt{s}=3$ TeV，包括初始态辐射和束流效应。我们关注的最终信号包括：同位二轻子~（电子或μ介子）、至少一个$b$标记的射流和大的缺失横动量。通过详细的信号-背景分析和探测器模拟，我们得到了VLQ-$X$ $m_{X}$的质量和相关参数~（$Br(Xto tW)$用于$m_{X}<1500$~GeV，耦合强度$g^{*}$用于$m_{X}geq1500$~GeV）在3 TeV CLIC的一些典型光度下分别为2sigma$的排除能力和5sigma$的发现率。
{"title":"Search for an exotic vector-like $X$-quark in same-sign dilepton final states at future 3 TeV CLIC","authors":"Yan-Ju Zhang, Jin-Long Chang, Tai-Gang Liu","doi":"10.1088/1674-1137/ad3ddd","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3ddd","url":null,"abstract":"\u0000 Vectorlike quarks~(VLQs) with masses at the TeV-scale have been predicted in many new physics scenarios beyond the Standard Model~(SM). Based on a simplified $left(X,Tright)$ doublet model including the exotic vectorlike $X$ quark~(VLQ-$X$) with electric charge $5/3$, we study the production of the VLQ-$X$ decaying into $tW$ at the future Compact Linear Collider~(CLIC) with $sqrt{s}=3$ TeV including the initial state radiation and beamstrahlung effects. We focus on the final signals including same-sign dilepton~(electrons or muons), at least one $b$-tagged jet and large missing transverse momentum. By performing a detailed signal-to-background analyses and detector simulations, we obtain the $2sigma$ exclusion capabilities and the $5sigma$ discovery reaches, respectively, on the mass of VLQ-$X$ $m_{X}$ and the relevant parameters~($Br(Xto tW)$ for $m_{X}<1500$~GeV and the coupling strength $g^{*}$ for $m_{X}geq1500$~GeV) for some typical luminosities at 3 TeV CLIC.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"4 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140712157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-12DOI: 10.1088/1674-1137/ad3dde
J. Dai, H. Li, H. Miao, Jianyu 张剑宇 Zhang
The prospects to study hyperon-nuclei/nucleon interactions at BESIII and similar $e^+ e^-$ colliders are proposed in this work. Utilizing the large quantity of hyperons produced by the decay of 10 billion $J/psi$ and 2.7 billion $psi(3686)$ collected at BESIII, the cross sections of several specific elastic or inelastic hyperon-nuclei reactions can be measured via the scattering between the hyperons and the nucleus in the dense objects of BESIII detector. Subsequently, the cross sections of corresponding hyperon-nucleon interactions are able to be extracted with further phenomenological calculation. Furthermore, the interactions between antihyperon and nuclei/nucleon, including scattering and annihilation, can also be studied via the method proposed in this paper. The results will definitely benefit a lot the precise probe of the hyperon-nuclei/nucleon interactions and provide constraints for the studies of the potential of strong interaction, the origin of color confinement, the unified model for baryon-baryon interactions, and the internal structure of neutron stars. In addition, the desirable prospects of corresponding studies in the future Super Tau-Charm Factory (STCF) are discussed and estimated in this work. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
{"title":"Prospects to study hyperon-nucleon interactions at BESIII","authors":"J. Dai, H. Li, H. Miao, Jianyu 张剑宇 Zhang","doi":"10.1088/1674-1137/ad3dde","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3dde","url":null,"abstract":"\u0000 The prospects to study hyperon-nuclei/nucleon interactions at BESIII and similar $e^+ e^-$ colliders are proposed in this work. Utilizing the large quantity of hyperons produced by the decay of 10 billion $J/psi$ and 2.7 billion $psi(3686)$ collected at BESIII, the cross sections of several specific elastic or inelastic hyperon-nuclei reactions can be measured via the scattering between the hyperons and the nucleus in the dense objects of BESIII detector. Subsequently, the cross sections of corresponding hyperon-nucleon interactions are able to be extracted with further phenomenological calculation. Furthermore, the interactions between antihyperon and nuclei/nucleon, including scattering and annihilation, can also be studied via the method proposed in this paper. The results will definitely benefit a lot the precise probe of the hyperon-nuclei/nucleon interactions and provide constraints for the studies of the potential of strong interaction, the origin of color confinement, the unified model for baryon-baryon interactions, and the internal structure of neutron stars. In addition, the desirable prospects of corresponding studies in the future Super Tau-Charm Factory (STCF) are discussed and estimated in this work. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"4 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140708981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-11DOI: 10.1088/1674-1137/ad3d4b
Xiao-Yan Zhu, Song Luo, Wei Gao, Lin-Jing Qi, Ming Li, Xiao-Hua Li, Wenbin Lin
In the present work, taking the α particle preformation probabilities Pα from Xu et al. [Xu and Ren, Nucl. Phys. A 760,303, 2005], which were extracted by fitting the experimental half-lives of α decay, based on a phenomenological harmonic oscillator potential model (HOPM) [Bayrak, J Phys G 47:025102, 2020], refitting 178 α decay half-lives of even-even nuclei taken from the latest nuclear property table NUBASE2020, we obtain the only one adjustable parameter V0 = 162.6MeV in HOPM i.e. the depth of nuclear potential, while the corresponding root-mean-square (rms) deviation is σ = 0.322. Furthermore, for considering the contribution of centrifugal potential to unfavored α decay half-lives, adding a new term d(l(l+ 1))^0.5 (d and l are the adjustable parameter and orbital angular momentum taken away by emitted α particle) to the logarithmic form of favored α decay half-lives under the HOPM framework, we propose an improved simple model (ISM) for calculating favored and unfavored α decay half-lives. Fitting the experimental half-lives of 205 unfavored α decay, we obtain d = 0.381. Using the improved simple model, the unfavored α decay half-lives of 128 odd-A and 77 odd-odd nuclei are calculated, the results are improved by 54.2% and 53.6%, respectively, compared with HOPM. In addition, we extend ISM to predict the α decay half-lives of 144 nuclei with Z = 117,118,119 and 120. For comparison, the improved model with eight parameters (DUR) proposed by Deng et al. [Deng, Phys. Rev. C 101: 034307, 2020] and the modified universal decay law (MUDL) put forward by Soylu et al. [Soylu, Nucl. Phys. A 1013: 122221, 2021] are also used. The predictions of these models and/or formulas are basically consistent with each other.
在本研究中，采用 Xu 等人[Xu 和 Ren，Nucl.A 760,303, 2005]中通过拟合α衰变的实验半衰期而提取的，基于现象学谐振子势模型（HOPM）[Bayrak, J Phys G 47:025102, 2020]，重新拟合从最新核特性表 NUBASE2020 中提取的 178 个偶偶核的α衰变半衰期，我们得到了 HOPM 中唯一一个可调参数 V0 = 162.6MeV 即核势深度，而相应的均方根偏差为 σ = 0.322。此外，为了考虑离心势对不利α衰变半衰期的贡献，我们在 HOPM 框架下的有利α衰变半衰期对数形式中加入了一个新项 d(l(l+ 1))^0.5（d 和 l 分别是可调参数和发射α粒子带走的轨道角动量），从而提出了一个改进的简单模型（ISM），用于计算有利和不利α衰变半衰期。通过拟合 205 个不利α衰变的实验半衰期，我们得到了 d = 0.381。利用改进后的简单模型，计算了 128 个奇数-A 核和 77 个奇数-多原子核的非有利α衰变半衰期，结果比 HOPM 分别提高了 54.2% 和 53.6%。此外，我们还扩展了 ISM 预测 Z = 117、118、119 和 120 的 144 个原子核的 α 衰变半衰期。为了进行比较，我们还使用了 Deng 等人[Deng，Phys. Rev. C 101: 034307, 2020]提出的八参数改进模型（DUR）和 Soylu 等人[Soylu，Nucl. Phys. A 1013: 122221, 2021]提出的修正通用衰变定律（MUDL）。这些模型和/或公式的预测结果基本一致。
{"title":"An improved simple model for the α decay half-lives","authors":"Xiao-Yan Zhu, Song Luo, Wei Gao, Lin-Jing Qi, Ming Li, Xiao-Hua Li, Wenbin Lin","doi":"10.1088/1674-1137/ad3d4b","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3d4b","url":null,"abstract":"\u0000 In the present work, taking the α particle preformation probabilities Pα from Xu et al. [Xu and Ren, Nucl. Phys. A 760,303, 2005], which were extracted by fitting the experimental half-lives of α decay, based on a phenomenological harmonic oscillator potential model (HOPM) [Bayrak, J Phys G 47:025102, 2020], refitting 178 α decay half-lives of even-even nuclei taken from the latest nuclear property table NUBASE2020, we obtain the only one adjustable parameter V0 = 162.6MeV in HOPM i.e. the depth of nuclear potential, while the corresponding root-mean-square (rms) deviation is σ = 0.322. Furthermore, for considering the contribution of centrifugal potential to unfavored α decay half-lives, adding a new term d(l(l+ 1))^0.5 (d and l are the adjustable parameter and orbital angular momentum taken away by emitted α particle) to the logarithmic form of favored α decay half-lives under the HOPM framework, we propose an improved simple model (ISM) for calculating favored and unfavored α decay half-lives. Fitting the experimental half-lives of 205 unfavored α decay, we obtain d = 0.381. Using the improved simple model, the unfavored α decay half-lives of 128 odd-A and 77 odd-odd nuclei are calculated, the results are improved by 54.2% and 53.6%, respectively, compared with HOPM. In addition, we extend ISM to predict the α decay half-lives of 144 nuclei with Z = 117,118,119 and 120. For comparison, the improved model with eight parameters (DUR) proposed by Deng et al. [Deng, Phys. Rev. C 101: 034307, 2020] and the modified universal decay law (MUDL) put forward by Soylu et al. [Soylu, Nucl. Phys. A 1013: 122221, 2021] are also used. The predictions of these models and/or formulas are basically consistent with each other.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"85 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140712659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-11DOI: 10.1088/1674-1137/ad3d4d
Xinyu Shan
Using e+e- annihilation data corresponding to an integrated luminosity of 2.93 fb-1 taken at the center-of-mass energy √s=3.773 GeV with the BESIII detector, a joint amplitude analysis is performed on the decays D0→π+π-π+π- and D0→π+π-π0π0(non-η). The fit fractions of individual components are obtained, and large interferences among the dominant components of the decays D0→a1(1260)π, D0→π(1300)π, D0→ρ(770)ρ(770) and D0→2(ππ)S are found in both channels. With the obtained amplitude model, the CP-even fractions of D0→π+π-π+π- and D0→π+π-π0π0(non-η) are determined to be (75.2 ± 1.1stat. ± 1.5syst.)% and (68.9 ± 1.5stat. ± 2.4syst.)%, respectively. The branching fractions of D0→π+π-π+π- and D0→π+π-π0π0(non-η) are measured to be (0.688 ± 0.010stat. ± 0.010syst.)% and (0.951 ± 0.025stat. ± 0.021syst.)%, respectively. The amplitude analysis provides an important model for binning strategy in the measurements of the strong phase parameters of D0→4π when used to determine the CKM angle γ(Φ3) via the B-→DK- decay. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.
{"title":"Amplitude Analysis of the Decays D<sup>0</sup>→π<sup>+</sup>π<sup>-</sup>π<sup>+</sup>π<sup>-</sup> and π<sup>+</sup>π<sup>-</sup>π<sup>0</sup>π<sup>0</sup>","authors":"Xinyu Shan","doi":"10.1088/1674-1137/ad3d4d","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3d4d","url":null,"abstract":"\u0000 Using e+e- annihilation data corresponding to an integrated luminosity of 2.93 fb-1 taken at the center-of-mass energy √s=3.773 GeV with the BESIII detector, a joint amplitude analysis is performed on the decays D0→π+π-π+π- and D0→π+π-π0π0(non-η). The fit fractions of individual components are obtained, and large interferences among the dominant components of the decays D0→a1(1260)π, D0→π(1300)π, D0→ρ(770)ρ(770) and D0→2(ππ)S are found in both channels. With the obtained amplitude model, the CP-even fractions of D0→π+π-π+π- and D0→π+π-π0π0(non-η) are determined to be (75.2 ± 1.1stat. ± 1.5syst.)% and (68.9 ± 1.5stat. ± 2.4syst.)%, respectively. The branching fractions of D0→π+π-π+π- and D0→π+π-π0π0(non-η) are measured to be (0.688 ± 0.010stat. ± 0.010syst.)% and (0.951 ± 0.025stat. ± 0.021syst.)%, respectively. The amplitude analysis provides an important model for binning strategy in the measurements of the strong phase parameters of D0→4π when used to determine the CKM angle γ(Φ3) via the B-→DK- decay. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Article funded by SCOAP3 and published under licence by Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Science and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"36 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140713102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-04-09DOI: 10.1088/1674-1137/ad3c2e
liao qili, Jun Jiang
Sizable amounts of massive quarkonium events should be produced through $Z^0$ boson decays at a future super $Z$ factory. Such channels will provide a suitable platform to study the precisely properties of massive quarkonium. We show that sizable amounts of events for pair of the higher excited states quarkonia can also be produced at the super Z factory. Therefore, we make a further study on calculate the exclusive production of pair of the higher excited charmonium, pair of the higher excited bottomonium, and pair of the higher excited $B_c$ mesons via $e^+e^-to Z^0 to |(Qbar{Q^prime})[n]rangle + |(Q^prime bar{Q})[n']rangle$ ($Q,~Q^prime=c$- or $b$-quarks) at the future $Z$ factory under the NRQCD, where the $[n]$/$[n^prime]$ represents the color-singlet states $[n^1S_0], [n^3S_1],~[n^1P_1]$, and $[^3P_J]$ ($[n]=1,2,3;J=0,1,2$). The differential angle distribution of cross sections $dsigma/dcostheta$ is given. For a sound estimate, we discus the uncertainties of total cross sections caused by varying quark masses and the renormalization scale $mu$. The numerical results show that the future super $Z$ factory should be also a good platform to study the exclusive production of pair of the higher excited massive quarkonium.
在未来的超Z$工厂里，通过$Z^0$玻色子衰变应该会产生相当数量的大质量夸克鎓事件。这些通道将为研究大质量夸克鎓的精确性质提供一个合适的平台。我们的研究表明，在超级 Z 工厂也可以产生相当数量的高激发态夸克鎓对事件。因此，我们进一步研究了通过$e^+e^-to Z^0 to |(Qbar{Q^prime})[n]rangle + |(Q^prime bar{Q})[n']rangle$ （$Q、~Q^prime=c$-或$b$-夸克），其中$[n]$/$[n^prime]$代表未来$Z$工厂在NRQCD下的小色子态$[n^1S_0], [n^3S_1],~[n^1P_1]$, 以及$[^3P_J]$ ($[n]=1,2,3；J=0,1,2$).给出了横截面 $dsigma/dcostheta$ 的差分角度分布。为了进行合理估计，我们讨论了不同夸克质量和重正化尺度 $mu$ 引起的总截面的不确定性。数值结果表明，未来的超Z$工厂也应该是研究高激发大质量夸克鎓对排他性产生的良好平台。
{"title":"Production pair of higher excited massive quarkonium at super Z factory","authors":"liao qili, Jun Jiang","doi":"10.1088/1674-1137/ad3c2e","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3c2e","url":null,"abstract":"\u0000 Sizable amounts of massive quarkonium events should be produced through $Z^0$ boson decays at a future super $Z$ factory. Such channels will provide a suitable platform to study the precisely properties of massive quarkonium. We show that sizable amounts of events for pair of the higher excited states quarkonia can also be produced at the super Z factory. Therefore, we make a further study on calculate the exclusive production of pair of the higher excited charmonium, pair of the higher excited bottomonium, and pair of the higher excited $B_c$ mesons via $e^+e^-to Z^0 to |(Qbar{Q^prime})[n]rangle + |(Q^prime bar{Q})[n']rangle$ ($Q,~Q^prime=c$- or $b$-quarks) at the future $Z$ factory under the NRQCD, where the $[n]$/$[n^prime]$ represents the color-singlet states $[n^1S_0], [n^3S_1],~[n^1P_1]$, and $[^3P_J]$ ($[n]=1,2,3;J=0,1,2$). The differential angle distribution of cross sections $dsigma/dcostheta$ is given. For a sound estimate, we discus the uncertainties of total cross sections caused by varying quark masses and the renormalization scale $mu$. The numerical results show that the future super $Z$ factory should be also a good platform to study the exclusive production of pair of the higher excited massive quarkonium.","PeriodicalId":504778,"journal":{"name":"Chinese Physics C","volume":"66 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140721836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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