Pub Date : 2024-07-01DOI: 10.1088/1674-1137/ad5d63
Ayushi Awasthi, Arushi Sharma, Ishwar Kant, O. Sastri
In this work, our goal is to construct inverse potentials for various $ell$-channels of neutron-proton scattering using piece-wise smooth Morse function as a reference. The phase equations for single-channel states and the coupled ones of multi-channel scattering have been solved numerically using the Runge-kutta 5$^{th}$ order method. We employ a piece-wise smooth reference potential comprising three Morse functions as initial input. Leveraging a machine learning-based Genetic Algorithm (GA), we optimize the model parameters to minimize the mean-squared error between simulated and anticipated phase shifts. Remarkably, our approach yields inverse potentials for both single and multi-channel scattering, achieving a convergence to a mean-squared error of $leq 10^{-3}$. The resulting scattering lengths `$a_0$' and effective ranges `$r$' for $^3S_1$ and $^1S_0$ states, expressed as [$a_0$, $r$], are found to be [5.445(5.424), 1.770(1.760)] $fm$ and [-23.741(-23.749), 2.63(2.81)] $fm$, respectively, in excellent agreement with experimental values. Furthermore, the calculated total scattering cross-sections exhibit a remarkable accord with experimental counterparts, having a percentage error of less than 1$%$. This computational approach is easily extendible to obtaining interaction potentials for charged particles scattering.
{"title":"High-precision inverse potentials for neutron-proton scattering using piece-wise smooth Morse functions","authors":"Ayushi Awasthi, Arushi Sharma, Ishwar Kant, O. Sastri","doi":"10.1088/1674-1137/ad5d63","DOIUrl":"https://doi.org/10.1088/1674-1137/ad5d63","url":null,"abstract":"\u0000 In this work, our goal is to construct inverse potentials for various $ell$-channels of neutron-proton scattering using piece-wise smooth Morse function as a reference. The phase equations for single-channel states and the coupled ones of multi-channel scattering have been solved numerically using the Runge-kutta 5$^{th}$ order method. We employ a piece-wise smooth reference potential comprising three Morse functions as initial input. Leveraging a machine learning-based Genetic Algorithm (GA), we optimize the model parameters to minimize the mean-squared error between simulated and anticipated phase shifts. Remarkably, our approach yields inverse potentials for both single and multi-channel scattering, achieving a convergence to a mean-squared error of $leq 10^{-3}$. The resulting scattering lengths `$a_0$' and effective ranges `$r$' for $^3S_1$ and $^1S_0$ states, expressed as [$a_0$, $r$], are found to be [5.445(5.424), 1.770(1.760)] $fm$ and [-23.741(-23.749), 2.63(2.81)] $fm$, respectively, in excellent agreement with experimental values. Furthermore, the calculated total scattering cross-sections exhibit a remarkable accord with experimental counterparts, having a percentage error of less than 1$%$. This computational approach is easily extendible to obtaining interaction potentials for charged particles scattering.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141710985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-01DOI: 10.1088/1674-1137/ad3b7e
Rui-Hong Yue, Kai-Qiang Qian, Bo Liu, De-Cheng Zou
Considering the nonminimal coupling of the dilaton field to the massive graviton field in Maxwell-dilaton-massive gravity, we obtain a class of analytical solutions of charged black holes, which are neither asymptotically flat nor (A)dS. The calculated thermodynamic quantities, such as mass, temperature, and entropy, verify the validity of the first law of black hole thermodynamics. Moreover, we further investigate the critical behaviors of these black holes in the grand canonical and canonical ensembles and find a novel critical phenomenon never before observed, known as the "reverse" reentrant phase transition with a tricritical point. It implies that the system undergoes a novel "SBH-LBH-SBH" phase transition process and is the reverse of the "LBH-SBH-LBH" process observed in reentrant phase transitions.
{"title":"Thermodynamics of charged black holes in Maxwell-dilaton-massive gravity* * Supported by the National Key Research and Development Program of China (2020YFC2201400). D. C. Zou is supported by the National Natural Science Foundation of China (12365009), and the Natural Science Foundation of Jiangxi Province, China (20232BAB201039)","authors":"Rui-Hong Yue, Kai-Qiang Qian, Bo Liu, De-Cheng Zou","doi":"10.1088/1674-1137/ad3b7e","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3b7e","url":null,"abstract":"Considering the nonminimal coupling of the dilaton field to the massive graviton field in Maxwell-dilaton-massive gravity, we obtain a class of analytical solutions of charged black holes, which are neither asymptotically flat nor (A)dS. The calculated thermodynamic quantities, such as mass, temperature, and entropy, verify the validity of the first law of black hole thermodynamics. Moreover, we further investigate the critical behaviors of these black holes in the grand canonical and canonical ensembles and find a novel critical phenomenon never before observed, known as the \"reverse\" reentrant phase transition with a tricritical point. It implies that the system undergoes a novel \"SBH-LBH-SBH\" phase transition process and is the reverse of the \"LBH-SBH-LBH\" process observed in reentrant phase transitions.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/1674-1137/ad39cc
Wei Jiang, 威 蒋, Yan-jun Chen and 晏军 陈
We explore the properties of 4110 nuclides from to with the Sky3D code and the composition of the outer crust in magnetars under extreme magnetic fields. The effects of the variation in nuclear masses due to magnetic fields on the outer crust are comprehensively studied. The neutron-drip transition pressure, equation of state, and neutron fraction in the outer crust are also discussed.
{"title":"Role of magnetic fields on the outer crust in a magnetar*","authors":"Wei Jiang, 威 蒋, Yan-jun Chen and 晏军 陈","doi":"10.1088/1674-1137/ad39cc","DOIUrl":"https://doi.org/10.1088/1674-1137/ad39cc","url":null,"abstract":"We explore the properties of 4110 nuclides from to with the Sky3D code and the composition of the outer crust in magnetars under extreme magnetic fields. The effects of the variation in nuclear masses due to magnetic fields on the outer crust are comprehensively studied. The neutron-drip transition pressure, equation of state, and neutron fraction in the outer crust are also discussed.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141193903","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We investigate the dynamic and thermodynamic laws governing rotating regular black holes. By analyzing dynamic properties, i.e., the interaction between scalar particles and rotating regular black holes, we establish the criteria that determine whether such black holes satisfy the laws of thermodynamics. In addition, we provide the general form of conserved quantities related to rotating regular black holes, including the relevant flows associated with neutral scalar particles. Meanwhile, we reexamine the relationship between the third law of thermodynamics and weak cosmic censorship conjecture for rotating regular black holes. Based on the abovementioned criteria, we discuss the laws of thermodynamics for three models of rotating regular black holes: Rotating Hayward black holes, Kerr black-bounce solutions, and loop quantum gravity black holes. Our findings indicate that none of the three models satisfies the first law of thermodynamics. In particular, the first and third models fail to comply with the three laws of thermodynamics, whereas the second model satisfies only the second and third laws of thermodynamics. Finally, we attempt to rescue the laws of thermodynamics by modifying entropy or extending the phase space. However, the two scenarios cannot ensure the three laws of thermodynamics in the three models, which reveals an unusual property of rotating regular black holes.
{"title":"Preliminary analyses of the dynamics and thermodynamics of rotating regular black holes*","authors":"Hao Yang, 昊 杨, Chang-Jiang Yu, 长江 余, Yan-Gang Miao and 炎刚 缪","doi":"10.1088/1674-1137/ad34c1","DOIUrl":"https://doi.org/10.1088/1674-1137/ad34c1","url":null,"abstract":"We investigate the dynamic and thermodynamic laws governing rotating regular black holes. By analyzing dynamic properties, i.e., the interaction between scalar particles and rotating regular black holes, we establish the criteria that determine whether such black holes satisfy the laws of thermodynamics. In addition, we provide the general form of conserved quantities related to rotating regular black holes, including the relevant flows associated with neutral scalar particles. Meanwhile, we reexamine the relationship between the third law of thermodynamics and weak cosmic censorship conjecture for rotating regular black holes. Based on the abovementioned criteria, we discuss the laws of thermodynamics for three models of rotating regular black holes: Rotating Hayward black holes, Kerr black-bounce solutions, and loop quantum gravity black holes. Our findings indicate that none of the three models satisfies the first law of thermodynamics. In particular, the first and third models fail to comply with the three laws of thermodynamics, whereas the second model satisfies only the second and third laws of thermodynamics. Finally, we attempt to rescue the laws of thermodynamics by modifying entropy or extending the phase space. However, the two scenarios cannot ensure the three laws of thermodynamics in the three models, which reveals an unusual property of rotating regular black holes.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141198042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We present that by predicting the spectrum in discrete space from the phase shift in continuous space, the neural network can remarkably reproduce the numerical Lüscher's formula to a high precision. The model-independent property of the Lüscher's formula is naturally realized by the generalizability of the neural network. This exhibits the great potential of the neural network to extract model-independent relation between model-dependent quantities, and this data-driven approach could greatly facilitate the discovery of the physical principles underneath the intricate data.
{"title":"Rediscovery of numerical Lüscher's formula from the neural network*","authors":"Yu Lu, 宇 陆, Yi-Jia Wang, 一佳 王, Ying Chen, 莹 陈, Jia-Jun Wu and 佳俊 吴","doi":"10.1088/1674-1137/ad3b9c","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3b9c","url":null,"abstract":"We present that by predicting the spectrum in discrete space from the phase shift in continuous space, the neural network can remarkably reproduce the numerical Lüscher's formula to a high precision. The model-independent property of the Lüscher's formula is naturally realized by the generalizability of the neural network. This exhibits the great potential of the neural network to extract model-independent relation between model-dependent quantities, and this data-driven approach could greatly facilitate the discovery of the physical principles underneath the intricate data.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/1674-1137/ad4268
Kun Wang, 坤 王, Jingya Zhu and 经亚 朱
Motivated by experimental hints and theoretical frameworks indicating the existence of an extended Higgs sector, we explore the feasibility of detecting a 95 GeV light Higgs boson decaying into a diphoton within the minimal dilaton model at the 14 TeV LHC. Initially, we identify the correlations between the production cross section, decay branching ratios, and model parameters, e.g., the scalar mixing angle . Subsequently, we utilize Monte Carlo simulations to generate the signal of the light Higgs boson via the process, along with the corresponding backgrounds. To effectively separate the signal from the dominant backgrounds , we employ a meticulous cut-based selection process. Ultimately, we find that with an integrated luminosity of , the regions of can be covered over the level.
实验提示和理论框架表明存在一个扩展的希格斯扇区，受此激励，我们探索了在 14 TeV 大型强子对撞机上探测 95 GeV 轻希格斯玻色子在最小稀拉顿模型中衰变为双光子的可行性。首先，我们确定了产生截面、衰变分支比和模型参数（如标量混合角）之间的相关性。随后，我们利用蒙特卡洛模拟，通过该过程产生轻希格斯玻色子信号以及相应的背景。为了有效地将信号与主要背景分离开来，我们采用了一种细致的基于剪切的选择过程。最终，我们发现，在综合光度为 ，的区域可以覆盖整个水平。
{"title":"95 GeV light Higgs in the top-pair-associated diphoton channel at the LHC in the minimal dilaton model*","authors":"Kun Wang, 坤 王, Jingya Zhu and 经亚 朱","doi":"10.1088/1674-1137/ad4268","DOIUrl":"https://doi.org/10.1088/1674-1137/ad4268","url":null,"abstract":"Motivated by experimental hints and theoretical frameworks indicating the existence of an extended Higgs sector, we explore the feasibility of detecting a 95 GeV light Higgs boson decaying into a diphoton within the minimal dilaton model at the 14 TeV LHC. Initially, we identify the correlations between the production cross section, decay branching ratios, and model parameters, e.g., the scalar mixing angle . Subsequently, we utilize Monte Carlo simulations to generate the signal of the light Higgs boson via the process, along with the corresponding backgrounds. To effectively separate the signal from the dominant backgrounds , we employ a meticulous cut-based selection process. Ultimately, we find that with an integrated luminosity of , the regions of can be covered over the level.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Here, we study the quantum coherence of N-partite Greenberger-Horne-Zeilinger (GHZ) and W states in the multiverse consisting of N causally disconnected de Sitter spaces. Interestingly, N-partite coherence increases monotonically with curvature, whereas the curvature effect destroys quantum entanglement and discord, indicating that the curvature effect is beneficial to quantum coherence and harmful to quantum correlations in the multiverse. We find that with an increase in n expanding de Sitter spaces, the N-partite coherence of the GHZ state increases monotonically for any curvature, whereas the quantum coherence of the W state decreases or increases monotonically depending on the curvature. We find a distribution relationship, which indicates that the correlated coherence of the N-partite W state is equal to the sum of all bipartite correlated coherence in the multiverse. Multipartite coherence exhibits unique properties in the multiverse, suggesting that it may provide some evidence for the existence of the multiverse.
在这里，我们研究了由N个因果断开的德西特空间组成的多重宇宙中N个部分格林伯格-霍恩-蔡林格（GHZ）态和W态的量子相干性。有趣的是，N部分相干性随曲率的增加而单调增加，而曲率效应则会破坏量子纠缠和不和谐，这表明曲率效应对多元宇宙中的量子相干性有利而对量子相关性有害。我们发现，随着扩展德西特空间 n 的增加，在任何曲率下，GHZ 状态的 N 部分相干性都会单调增加，而 W 状态的量子相干性则会根据曲率的不同而单调减少或增加。我们发现了一种分布关系，它表明 N 方 W 态的相关相干性等于多重宇宙中所有双方相关相干性的总和。多方相干性在多元宇宙中表现出独特的性质，这表明它可能为多元宇宙的存在提供了一些证据。
{"title":"Curvature-enhanced multipartite coherence in the multiverse*","authors":"Shu-Min Wu, 树民 吴, Chun-Xu Wang, 春旭 王, Rui-Di Wang, 锐迪 王, Jin-Xuan Li, 金璇 李, Xiao-Li Huang, 晓理 黄, Hao-Sheng Zeng and 浩生 曾","doi":"10.1088/1674-1137/ad32bf","DOIUrl":"https://doi.org/10.1088/1674-1137/ad32bf","url":null,"abstract":"Here, we study the quantum coherence of N-partite Greenberger-Horne-Zeilinger (GHZ) and W states in the multiverse consisting of N causally disconnected de Sitter spaces. Interestingly, N-partite coherence increases monotonically with curvature, whereas the curvature effect destroys quantum entanglement and discord, indicating that the curvature effect is beneficial to quantum coherence and harmful to quantum correlations in the multiverse. We find that with an increase in n expanding de Sitter spaces, the N-partite coherence of the GHZ state increases monotonically for any curvature, whereas the quantum coherence of the W state decreases or increases monotonically depending on the curvature. We find a distribution relationship, which indicates that the correlated coherence of the N-partite W state is equal to the sum of all bipartite correlated coherence in the multiverse. Multipartite coherence exhibits unique properties in the multiverse, suggesting that it may provide some evidence for the existence of the multiverse.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-30DOI: 10.1088/1674-1137/ad3c2d
Tianshu Wu, 天枢 吴, Yiqian Chen and 一千 陈
This paper investigates observable signatures of hot spots orbiting Reissner-Nordström (RN) black holes and naked singularities. For an RN black hole, we find two discernible lensing image tracks in time integrated images, capturing a complete orbit of hot spots and a image shadow within the critical curve where photons with a small impact parameter fall into the event horizon. Conversely, in RN singularities, additional image tracks can be found within the critical curve, originating from photons reflected by the infinitely high effective potential well. Moreover, we find incomplete and converging tracks from the time integrated images of hot spot orbiting RN singularities that have no photon sphere. The presence of these additional image tracks significantly influences temporal magnitudes at their local maxima, enabling us to differentiate between RN black holes and RN naked singularities.
{"title":"Distinguishing the observational signatures of hot spots orbiting Reissner-Nordström spacetime*","authors":"Tianshu Wu, 天枢 吴, Yiqian Chen and 一千 陈","doi":"10.1088/1674-1137/ad3c2d","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3c2d","url":null,"abstract":"This paper investigates observable signatures of hot spots orbiting Reissner-Nordström (RN) black holes and naked singularities. For an RN black hole, we find two discernible lensing image tracks in time integrated images, capturing a complete orbit of hot spots and a image shadow within the critical curve where photons with a small impact parameter fall into the event horizon. Conversely, in RN singularities, additional image tracks can be found within the critical curve, originating from photons reflected by the infinitely high effective potential well. Moreover, we find incomplete and converging tracks from the time integrated images of hot spot orbiting RN singularities that have no photon sphere. The presence of these additional image tracks significantly influences temporal magnitudes at their local maxima, enabling us to differentiate between RN black holes and RN naked singularities.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141165745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-14DOI: 10.1088/1674-1137/ad582a
Binbin Yan
The proton-proton ($pp$) fusion chain dominates the neutrino production from the Sun. The uncertainty of the predicted $pp$ neutrino flux is at the sub-percent level, whereas that of the best measurement is $mathcal{O}(10%)$. In this paper, we present the first result to measure the solar $pp$ neutrinos in the electron recoil energy range from 24 to 144 keV, using the PandaX-4T commissioning data with 0.63 tonne$times$year exposure. The $pp$ neutrino flux is determined to be $(8.0 pm 3.9 ,{rm{(stat)}} pm 10.0 ,{rm{(syst)}} )times 10^{10}, $$rm{s}^{-1} rm{cm}^{-2}$, consistent with Standard Solar Model and existing measurements, corresponding to a flux upper limit of $23.3times 10^{10}, $$rm{s}^{-1} rm{cm}^{-2}$ at 90% C.L.. 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":"Measurement of Solar $pp$ Neutrino Flux using Electron Recoil Data from PandaX-4T Commissioning Run","authors":"Binbin Yan","doi":"10.1088/1674-1137/ad582a","DOIUrl":"https://doi.org/10.1088/1674-1137/ad582a","url":null,"abstract":"\u0000 The proton-proton ($pp$) fusion chain dominates the neutrino production from the Sun. The uncertainty of the predicted $pp$ neutrino flux is at the sub-percent level, whereas that of the best measurement is $mathcal{O}(10%)$. In this paper, we present the first result to measure the solar $pp$ neutrinos in the electron recoil energy range from 24 to 144 keV, using the PandaX-4T commissioning data with 0.63 tonne$times$year exposure. The $pp$ neutrino flux is determined to be $(8.0 pm 3.9 ,{rm{(stat)}} pm 10.0 ,{rm{(syst)}} )times 10^{10}, $$rm{s}^{-1} rm{cm}^{-2}$, consistent with Standard Solar Model and existing measurements, corresponding to a flux upper limit of $23.3times 10^{10}, $$rm{s}^{-1} rm{cm}^{-2}$ at 90% C.L.. 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":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141341359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-13DOI: 10.1088/1674-1137/ad57a6
Anshul Dadwal, Xiao-Tao He
A variable moment of inertia (VMI) inspired interacting boson model (IBM), which includes many-body interactions and a perturbation possessing the SO(5) (or SU(5)) symmetry is used to investigate the rotational bands of the $Asim 250$ mass region. A novel modification is introduced, extending the Arima coefficient to the third order. This study is dedicated to the quantitative analysis of evolving trends in intraband $gamma$-transition energy, kinematic, and the dynamic moment of inertia within the rotational bands of $^{244}$Pu and $^{248}$Cm. The computed outcomes exhibit an exceptional degree of agreement with experimental observations across various conditions. The significance of including a higher-order Arima coefficient is further examined by contrasting it with the previously suggested model. The calculated results demonstrate the significance of both the anti-pairing and pairing effects in the evolution of the dynamic moment of inertia. Additionally, these insights reveal the importance of a newly introduced parameter in accurately depicting complex nuclear behaviors such as back-bending, up-bending, and the downturn in the moment of inertia.
{"title":"Description of moment of inertia and the interplay between anti-pairing and pairing correlations in $^{244}$Pu and $^{248}$Cm","authors":"Anshul Dadwal, Xiao-Tao He","doi":"10.1088/1674-1137/ad57a6","DOIUrl":"https://doi.org/10.1088/1674-1137/ad57a6","url":null,"abstract":"\u0000 A variable moment of inertia (VMI) inspired interacting boson model (IBM), which includes many-body interactions and a perturbation possessing the SO(5) (or SU(5)) symmetry is used to investigate the rotational bands of the $Asim 250$ mass region. A novel modification is introduced, extending the Arima coefficient to the third order. This study is dedicated to the quantitative analysis of evolving trends in intraband $gamma$-transition energy, kinematic, and the dynamic moment of inertia within the rotational bands of $^{244}$Pu and $^{248}$Cm. The computed outcomes exhibit an exceptional degree of agreement with experimental observations across various conditions. The significance of including a higher-order Arima coefficient is further examined by contrasting it with the previously suggested model. The calculated results demonstrate the significance of both the anti-pairing and pairing effects in the evolution of the dynamic moment of inertia. Additionally, these insights reveal the importance of a newly introduced parameter in accurately depicting complex nuclear behaviors such as back-bending, up-bending, and the downturn in the moment of inertia.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141350039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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