Pub Date : 2024-04-01DOI: 10.1088/1674-1137/ad243d
Dong-Meng Zhang, Xiao-Yuan Hu, Lin-Jing Qi, Hong-Ming Liu, Ming Li, Xiao-Hua Li
In this study, proton emission half-lives were investigated for deformed proton emitters with based on the presented deformed Gamow-like model, where the deformation effect was included in the Coulomb potential. The experimental half-lives of proton emitters can be reproduced within a factor of 3.45. For comparison, the results from the universal decay law and the new Geiger-Nuttall law are also presented. Furthermore, the relevance of the half-lives to the angular momentum l for 117La, 121Pr, 135Tb, and 141Ho were analyzed, and the corresponding possible values of l were proposed: l = 3, 3, 4, 4.
在这项研究中，根据所提出的变形伽莫样模型，对变形质子发射器的质子发射半衰期进行了研究，在该模型中，库仑势中包含了变形效应。质子发射器的实验半衰期可在 3.45 倍的范围内重现。为了进行比较，还介绍了通用衰变定律和新的盖革-努塔尔定律的结果。此外，还分析了 117La、121Pr、135Tb 和 141Ho 的半衰期与角动量 l 的相关性，并提出了相应的可能 l 值：l = 3、3、4、4。
{"title":"Theoretical calculations of proton emission half-lives based on a deformed Gamow-like model* * Supported in part by the National Natural Science Foundation of China (12175100, 11975132), the Construct Program of the Key Discipline in Hunan Province, the Research Foundation of Education Bureau of Hunan Province, China (21B0402, 18A237), the Natural Science Foundation of Hunan Province, China (2018JJ2321), the Innovation Group of Nuclear and Particle Physics in USC, the Shandong Province Natural Science Foundation, China (ZR2022JQ04), the Hunan Provincial Innovation Foundation For Postgraduate (CX20220993), and the Opening Project of Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China (2019KFZ10).","authors":"Dong-Meng Zhang, Xiao-Yuan Hu, Lin-Jing Qi, Hong-Ming Liu, Ming Li, Xiao-Hua Li","doi":"10.1088/1674-1137/ad243d","DOIUrl":"https://doi.org/10.1088/1674-1137/ad243d","url":null,"abstract":"In this study, proton emission half-lives were investigated for deformed proton emitters with <inline-formula>\u0000<tex-math><?CDATA $ 53leq Z leq 83 $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_4_044102_M1.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> based on the presented deformed Gamow-like model, where the deformation effect was included in the Coulomb potential. The experimental half-lives of proton emitters can be reproduced within a factor of 3.45. For comparison, the results from the universal decay law and the new Geiger-Nuttall law are also presented. Furthermore, the relevance of the half-lives to the angular momentum <italic toggle=\"yes\">l</italic> for <sup>117</sup>La, <sup>121</sup>Pr, <sup>135</sup>Tb, and <sup>141</sup>Ho were analyzed, and the corresponding possible values of <italic toggle=\"yes\">l</italic> were proposed: <italic toggle=\"yes\">l </italic>= 3, 3, 4, 4.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"31 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140311146","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 : 2024-03-01DOI: 10.1088/1674-1137/ad1b3d
Sihan Zhang, Xiaobin Wang, Tao Lin, Lei Chang
A new method based on the maximum entropy principle for reconstructing the parton distribution function (PDF) from moments is proposed. Unlike traditional methods, the new method does not require any artificial assumptions. For the case of moments with errors, we introduce Gaussian functions to soften the constraints of moments. Through a series of tests, the effectiveness and reconstruction efficiency of this new method are evaluated comprehensively, demonstrating that this method is reasonable and can achieve high-quality reconstruction with at least the first six moments as input. Finally, we select a set of lattice quantum chromodynamics (QCD) results regarding moments as input and provide reasonable reconstruction results for the pion.
{"title":"Reconstructing parton distribution function based on maximum entropy method* * Supported by Key Project for Undergraduate Teaching Reform and Quality Enhancement Research Plan in Ordinary Colleges and Universities in Tianjin (A231005505)","authors":"Sihan Zhang, Xiaobin Wang, Tao Lin, Lei Chang","doi":"10.1088/1674-1137/ad1b3d","DOIUrl":"https://doi.org/10.1088/1674-1137/ad1b3d","url":null,"abstract":"A new method based on the maximum entropy principle for reconstructing the parton distribution function (PDF) from moments is proposed. Unlike traditional methods, the new method does not require any artificial assumptions. For the case of moments with errors, we introduce Gaussian functions to soften the constraints of moments. Through a series of tests, the effectiveness and reconstruction efficiency of this new method are evaluated comprehensively, demonstrating that this method is reasonable and can achieve high-quality reconstruction with at least the first six moments as input. Finally, we select a set of lattice quantum chromodynamics (QCD) results regarding moments as input and provide reasonable reconstruction results for the pion.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"4 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140005075","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 : 2024-03-01DOI: 10.1088/1674-1137/ad18d3
Niu Li, Si-Na Wei, Rong-Yao Yang, Jing Ye, Wei-Zhou Jiang
We investigate the effects of the σ meson mass (), symmetry energy, and slope of the symmetry energy on the neutron star core-crust transition density and the crustal moment of inertia () in the nonlinear relativistic Hartree approach (RHA), which includes vacuum polarization. Although the core-crust transition density (), pressure (), and neutron star radius (R), which are all dependent on the symmetry energy, contribute to determining , we find that changing only the slope of symmetry energy within a reasonable range is not sufficient to reach % to achieve the large glitches of the Vela pulsar. However, since all three factors (, , and R) increase with the increase in through scalar vacuum polarization, adjusting can easily achieve %.
{"title":"Neutron star core-crust transition and the crustal moment of inertia in the nonlinear relativistic Hartree approximation* * Supported in part by the National Natural Science Foundation of China (11775049, 12375112)","authors":"Niu Li, Si-Na Wei, Rong-Yao Yang, Jing Ye, Wei-Zhou Jiang","doi":"10.1088/1674-1137/ad18d3","DOIUrl":"https://doi.org/10.1088/1674-1137/ad18d3","url":null,"abstract":"We investigate the effects of the <italic toggle=\"yes\">σ</italic> meson mass (<inline-formula>\u0000<tex-math><?CDATA $ m_sigma $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M1.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>), symmetry energy, and slope of the symmetry energy on the neutron star core-crust transition density and the crustal moment of inertia (<inline-formula>\u0000<tex-math><?CDATA $ Delta I/I $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M2.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>) in the nonlinear relativistic Hartree approach (RHA), which includes vacuum polarization. Although the core-crust transition density (<inline-formula>\u0000<tex-math><?CDATA $ rho_{t} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M3.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>), pressure (<inline-formula>\u0000<tex-math><?CDATA $ P_{t} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M4.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>), and neutron star radius (<italic toggle=\"yes\">R</italic>), which are all dependent on the symmetry energy, contribute to determining <inline-formula>\u0000<tex-math><?CDATA $ Delta I/I $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M5.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, we find that changing only the slope of symmetry energy within a reasonable range is not sufficient to reach <inline-formula>\u0000<tex-math><?CDATA $Delta I/Igeq7$?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M6.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>% to achieve the large glitches of the Vela pulsar. However, since all three factors (<inline-formula>\u0000<tex-math><?CDATA $ rho_{t} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M7.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, <inline-formula>\u0000<tex-math><?CDATA $ P_{t} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M8.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, and <italic toggle=\"yes\">R</italic>) increase with the increase in <inline-formula>\u0000<tex-math><?CDATA $ m_sigma $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M9.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> through scalar vacuum polarization, adjusting <inline-formula>\u0000<tex-math><?CDATA $ m_sigma $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M10.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> can easily achieve <inline-formula>\u0000<tex-math><?CDATA $Delta I/Igeq7$?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034105_M11.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>%.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"3 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139771635","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}
Wobbling motion in a system comprising a triaxial rotor and a single quasiparticle is studied employing the particle-rotor model. The energy spectra, wobbling frequencies, electromagnetic transition probabilities, g-factors, angular momentum components, spin coherent state maps, and static quadrupole moments are investigated. These investigations were conducted with regard to the Fermi surface transitioning from the lowest orbit to the highest one. As the Fermi surface increases, notable transformations occur in the wobbling mode. Initially, the mode exhibits a transverse revolution around the short axis of the nucleus. However, as the Fermi surface continues to increase, the mode gradually shifts to a longitudinal revolution around the intermediate axis. Eventually, it transitions to a transverse revolution around the long axis. Notably, the stability of the long axis transverse mode diminishes relative to its counterpart along the short axis as the total angular momentum increases at .
{"title":"Wobbling motion for a triaxial rotor plus a single quasiparticle* * Supported by the National Natural Science Foundation of China (12205103, 12175071)","authors":"Si-Hua Li, Hua-Ming Dai, Qi-Bo Chen, Xian-Rong Zhou","doi":"10.1088/1674-1137/ad18d2","DOIUrl":"https://doi.org/10.1088/1674-1137/ad18d2","url":null,"abstract":"Wobbling motion in a system comprising a triaxial rotor and a single quasiparticle is studied employing the particle-rotor model. The energy spectra, wobbling frequencies, electromagnetic transition probabilities, <italic toggle=\"yes\">g</italic>-factors, angular momentum components, spin coherent state maps, and static quadrupole moments are investigated. These investigations were conducted with regard to the Fermi surface transitioning from the lowest <inline-formula>\u0000<tex-math><?CDATA $ h_{11/2} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034102_M1.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> orbit to the highest one. As the Fermi surface increases, notable transformations occur in the wobbling mode. Initially, the mode exhibits a transverse revolution around the short axis of the nucleus. However, as the Fermi surface continues to increase, the mode gradually shifts to a longitudinal revolution around the intermediate axis. Eventually, it transitions to a transverse revolution around the long axis. Notably, the stability of the long axis transverse mode diminishes relative to its counterpart along the short axis as the total angular momentum increases at <inline-formula>\u0000<tex-math><?CDATA $ gamma=20^circ $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_034102_M2.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"97 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139771516","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 : 2024-03-01DOI: 10.1088/1674-1137/ad1a0c
Wen-Hao Wu, Yong Tang
General relativity has been very successful since its proposal more than a century ago. However, various cosmological observations and theoretical consistency still motivate us to explore extended gravity theories. Horndeski gravity stands out as one attractive theory by introducing only one scalar field. Here we formulate the post-Newtonian effective field theory of Horndeski gravity and investigate the conservative dynamics of inspiral compact binary systems. We calculate the leading effective Lagrangian for a compact binary and obtain the periastron advance per period. In particular, we apply our analytical calculation to two binary systems, PSR B 1534+12 and PSR J0737-3039, and constrain the relevant model parameters. This theoretical framework can also be systematically extended to higher orders.
广义相对论自一个多世纪前提出以来一直非常成功。然而，各种宇宙学观测结果和理论一致性仍然促使我们探索扩展引力理论。霍恩德斯基引力只引入了一个标量场，是一种极具吸引力的理论。在这里，我们提出了霍恩德斯基引力的后牛顿有效场理论，并研究了吸积紧凑双星系统的保守动力学。我们计算了紧凑双星的前导有效拉格朗日，并得到了每个周期的周天推进量。特别是，我们将分析计算应用于两个双星系统--PSR B 1534+12 和 PSR J0737-3039，并约束了相关的模型参数。这一理论框架还可以系统地扩展到更高阶。
{"title":"Post-Newtonian binary dynamics in the effective field theory of Horndeski gravity* * Supported by National Key Research and Development Program of China (2021YFC2201901) and National Natural Science Foundation of China (12147103, 11851302)","authors":"Wen-Hao Wu, Yong Tang","doi":"10.1088/1674-1137/ad1a0c","DOIUrl":"https://doi.org/10.1088/1674-1137/ad1a0c","url":null,"abstract":"General relativity has been very successful since its proposal more than a century ago. However, various cosmological observations and theoretical consistency still motivate us to explore extended gravity theories. Horndeski gravity stands out as one attractive theory by introducing only one scalar field. Here we formulate the post-Newtonian effective field theory of Horndeski gravity and investigate the conservative dynamics of inspiral compact binary systems. We calculate the leading effective Lagrangian for a compact binary and obtain the periastron advance per period. In particular, we apply our analytical calculation to two binary systems, PSR B 1534+12 and PSR J0737-3039, and constrain the relevant model parameters. This theoretical framework can also be systematically extended to higher orders.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"16 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140005057","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}
Black holes (BHs) exhibiting coordinate singularities but lacking essential singularities throughout the spacetime are referred to as regular black holes (RBHs). The initial formulation of RBHs was presented by Bardeen, who considered the Einstein equation coupled with a nonlinear electromagnetic field. In this study, we investigate the gravitational perturbations, including the axial and polar sectors, of the Bardeen (Anti-) de Sitter black holes. We derive the master equations with source terms for both axial and polar perturbations and subsequently compute the quasinormal modes (QNMs) through numerical methods. For the Bardeen de Sitter black hole, we employ the 6th-order WKB approach. The numerical results reveal that the isospectrality is broken in this case. Conversely, the QNM frequencies are calculated using the HH method for the Bardeen Anti-de Sitter black hole.
{"title":"Quasinormal modes and isospectrality of Bardeen (Anti-) de Sitter black holes* * Supported by the the Natural Science Foundation of Hunan Province, China (2022JJ40262), and the National Natural Science Foundation of China (12375046, 12205254)","authors":"Ying Zhao, Wentao Liu, Chao Zhang, Xiongjun Fang, Jiliang Jing","doi":"10.1088/1674-1137/ad1ed8","DOIUrl":"https://doi.org/10.1088/1674-1137/ad1ed8","url":null,"abstract":"Black holes (BHs) exhibiting coordinate singularities but lacking essential singularities throughout the spacetime are referred to as regular black holes (RBHs). The initial formulation of RBHs was presented by Bardeen, who considered the Einstein equation coupled with a nonlinear electromagnetic field. In this study, we investigate the gravitational perturbations, including the axial and polar sectors, of the Bardeen (Anti-) de Sitter black holes. We derive the master equations with source terms for both axial and polar perturbations and subsequently compute the quasinormal modes (QNMs) through numerical methods. For the Bardeen de Sitter black hole, we employ the 6th-order WKB approach. The numerical results reveal that the isospectrality is broken in this case. Conversely, the QNM frequencies are calculated using the HH method for the Bardeen Anti-de Sitter black hole.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"100 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140005058","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 : 2024-03-01DOI: 10.1088/1674-1137/ad1cdb
G.R. Boroun, B. Rezaei, F. Abdi
An analytical study with respect to the nonlinear corrections for the nuclear gluon distribution function in the next-to-leading order approximation at small x is presented. We consider the nonlinear corrections to the nuclear gluon distribution functions at low values of x and using the parametrization and the nuclear modification factors obtained from the Khanpour-Soleymaninia-Atashbar-Spiesberger-Guzey model. The CT18 gluon distribution is used for the baseline proton gluon density at . We discuss the behavior of the gluon densities in the next-to-leading order and the next-to-next-to-leading order approximations at the initial scale , as well as the modifications due to the nonlinear corrections. We find that the QCD nonlinear corrections are more significant for the next-to-leading order accuracy than the next-to-next-to-leading order for light and heavy nuclei. The results of the nonlinear GLR-MQ evolution equation are similar to those obtained with the Rausch-Guzey-Klasen gluon upward and downward evolutions within the uncertainties. The magnitude of the gluon distribution with the nonlinear corrections increases with a decrease in x and an increase in atomic number A.
本文介绍了对小 x 值下次导阶近似核胶子分布函数非线性修正的分析研究。我们考虑了低 x 值时核胶子分布函数的非线性修正，并使用了从 Khanpour-Soleymaninia-Atashbar-Spiesberger-Guzey 模型获得的参数化和核修正因子。我们使用 CT18 胶子分布来计算基线质子胶子密度。我们讨论了胶子密度在初始尺度下的次领先阶近似和次领先阶近似的行为，以及非线性修正引起的变化。我们发现，对于轻核和重核而言，QCD 非线性修正对于次导阶精度的影响比次邻导阶更大。非线性 GLR-MQ 演变方程的结果与劳施-古泽-克拉斯恩胶子向上和向下演化方程的结果相似，都在不确定范围之内。随着 x 的减小和原子序数 A 的增大，非线性修正的胶子分布幅度也随之增大。
{"title":"Nonlinear corrections for the nuclear gluon distribution in eA processes","authors":"G.R. Boroun, B. Rezaei, F. Abdi","doi":"10.1088/1674-1137/ad1cdb","DOIUrl":"https://doi.org/10.1088/1674-1137/ad1cdb","url":null,"abstract":"An analytical study with respect to the nonlinear corrections for the nuclear gluon distribution function in the next-to-leading order approximation at small <italic toggle=\"yes\">x</italic> is presented. We consider the nonlinear corrections to the nuclear gluon distribution functions at low values of <italic toggle=\"yes\">x</italic> and <inline-formula>\u0000<tex-math><?CDATA $ Q^{2} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033107_M1.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> using the parametrization <inline-formula>\u0000<tex-math><?CDATA $ F_{2}(x,Q^{2}) $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033107_M2.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>and the nuclear modification factors obtained from the Khanpour-Soleymaninia-Atashbar-Spiesberger-Guzey model. The CT18 gluon distribution is used for the baseline proton gluon density at <inline-formula>\u0000<tex-math><?CDATA $ Q_{0}^{2}=1.69; {rm{GeV}}^2 $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033107_M3.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>. We discuss the behavior of the gluon densities in the next-to-leading order and the next-to-next-to-leading order approximations at the initial scale <inline-formula>\u0000<tex-math><?CDATA $ Q_{0}^{2} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033107_M4.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, as well as the modifications due to the nonlinear corrections. We find that the QCD nonlinear corrections are more significant for the next-to-leading order accuracy than the next-to-next-to-leading order for light and heavy nuclei. The results of the nonlinear GLR-MQ evolution equation are similar to those obtained with the Rausch-Guzey-Klasen gluon upward and downward evolutions within the uncertainties. The magnitude of the gluon distribution with the nonlinear corrections increases with a decrease in <italic toggle=\"yes\">x</italic> and an increase in atomic number A.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140005064","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 : 2024-03-01DOI: 10.1088/1674-1137/ad181c
Qi Xin, Zhi-Gang Wang
In this study, we apply the QCD sum rules to investigate the vector fully-light tetraquark states with an explicit <italic toggle="yes">P</italic>-wave between the diquark and antidiquark pairs. We observed that the <inline-formula><tex-math><?CDATA $ Cgamma_alphaotimesstackrel{leftrightarrow}{partial}_muotimesgamma^alpha C $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M1.jpg" xlink:type="simple"></inline-graphic></inline-formula> (or <inline-formula><tex-math><?CDATA $ Cgamma_alphaotimesstackrel{leftrightarrow}D_muotimesgamma^alpha C $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M2.jpg" xlink:type="simple"></inline-graphic></inline-formula>) type current with fully-strange quarks couples potentially to a tetraquark state with a mass <inline-formula><tex-math><?CDATA $ 2.16 pm 0.14 ,{rm{GeV}} $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M3.jpg" xlink:type="simple"></inline-graphic></inline-formula>, which supports assigning <inline-formula><tex-math><?CDATA $ Y(2175)/phi(2170) $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M4.jpg" xlink:type="simple"></inline-graphic></inline-formula> as the diquark-antidiquark type tetraquark state with <inline-formula><tex-math><?CDATA $J^{PC}=1^{--}$?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M5.jpg" xlink:type="simple"></inline-graphic></inline-formula>. The <inline-formula><tex-math><?CDATA $ qsbar{q}bar{s} $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M6.jpg" xlink:type="simple"></inline-graphic></inline-formula> and <inline-formula><tex-math><?CDATA $ ssbar{s}bar{s} $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M7.jpg" xlink:type="simple"></inline-graphic></inline-formula> vector tetraquark states with the structure <inline-formula><tex-math><?CDATA $ Cgamma_muotimes stackrel{leftrightarrow}{partial}_alpha otimesgamma^alpha C + Cgamma^alpha otimesstackrel{leftrightarrow}{partial}_alpha otimesgamma_mu $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M8.jpg" xlink:type="simple"></inline-graphic></inline-formula> (or <inline-formula><tex-math><?CDATA $ Cgamma_muotimes stackrel{leftrightarrow}D_alpha otimesgamma^alpha C + Cgamma^alpha otimesstackrel{leftrightarrow}D_alpha otimesgamma_mu $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M9.jpg" xlink:type="simple"></inline-graphic></inline-formula>) are consistent with <inline-formula><tex-math><?CDATA $ X(2200) $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M10.jpg" xlink:type="simple"></inline-graphic></inline-formula> and <inline-formula><tex-math><?CDATA $ X(2400) $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M11.jpg" xlink:type="simple"></inline-graphic></inline-formula>, respectively, which lie in the region from <inline-formula><tex-math><?CDATA $ 2.20 $?></tex-math><inline-graphic xlink:href="cpc_48_3_033104_M12.jpg" xlink:type="simple"></inline-graphic></inline-formula> to <inline-formula><tex
在这项研究中，我们应用 QCD 和规则研究了二夸克和反夸克对之间具有明确 P 波的矢量全轻四夸克态。我们观察到，具有全奇异夸克的（或）型电流有可能耦合到质量为Ⅳ的四夸克态，这支持把质量为Ⅴ的二夸克-反夸克型四夸克态归入Ⅳ型四夸克态。结构为 （或 ）的矢量四夸克态和结构为 （或 ）的矢量四夸克态分别与 （或 ）和 （或 ）相一致，它们位于从 到 的区域。 具有明确 P 波的完全奇异矢量四夸克态的质量中心值大约为 （或 ）。同时还给出了对其他具有和不具有隐奇异结构的全轻矢量四夸克态的预测。
{"title":"Fully-light vector tetraquark states with explicit P-wave via QCD sum rules* * Supported by National Natural Science Foundation (12175068) and Postgraduate Students Innovative Capacity Foundation of Hebei Education Department (CXZZBS2023146)","authors":"Qi Xin, Zhi-Gang Wang","doi":"10.1088/1674-1137/ad181c","DOIUrl":"https://doi.org/10.1088/1674-1137/ad181c","url":null,"abstract":"In this study, we apply the QCD sum rules to investigate the vector fully-light tetraquark states with an explicit <italic toggle=\"yes\">P</italic>-wave between the diquark and antidiquark pairs. We observed that the <inline-formula>\u0000<tex-math><?CDATA $ Cgamma_alphaotimesstackrel{leftrightarrow}{partial}_muotimesgamma^alpha C $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M1.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> (or <inline-formula>\u0000<tex-math><?CDATA $ Cgamma_alphaotimesstackrel{leftrightarrow}D_muotimesgamma^alpha C $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M2.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>) type current with fully-strange quarks couples potentially to a tetraquark state with a mass <inline-formula>\u0000<tex-math><?CDATA $ 2.16 pm 0.14 ,{rm{GeV}} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M3.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, which supports assigning <inline-formula>\u0000<tex-math><?CDATA $ Y(2175)/phi(2170) $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M4.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> as the diquark-antidiquark type tetraquark state with <inline-formula>\u0000<tex-math><?CDATA $J^{PC}=1^{--}$?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M5.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>. The <inline-formula>\u0000<tex-math><?CDATA $ qsbar{q}bar{s} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M6.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> and <inline-formula>\u0000<tex-math><?CDATA $ ssbar{s}bar{s} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M7.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> vector tetraquark states with the structure <inline-formula>\u0000<tex-math><?CDATA $ Cgamma_muotimes stackrel{leftrightarrow}{partial}_alpha otimesgamma^alpha C + Cgamma^alpha otimesstackrel{leftrightarrow}{partial}_alpha otimesgamma_mu $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M8.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> (or <inline-formula>\u0000<tex-math><?CDATA $ Cgamma_muotimes stackrel{leftrightarrow}D_alpha otimesgamma^alpha C + Cgamma^alpha otimesstackrel{leftrightarrow}D_alpha otimesgamma_mu $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M9.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>) are consistent with <inline-formula>\u0000<tex-math><?CDATA $ X(2200) $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M10.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> and <inline-formula>\u0000<tex-math><?CDATA $ X(2400) $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M11.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, respectively, which lie in the region from <inline-formula>\u0000<tex-math><?CDATA $ 2.20 $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_3_033104_M12.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> to <inline-formula>\u0000<tex","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"26 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139771640","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 : 2024-02-01DOI: 10.1088/1674-1137/ad1028
J. H. Khushvaktov, M. A. Demichev, D. L. Demin, S. A. Evseev, M. I. Gostkin, V. V. Kobets, F. A. Rasulova, S. V. Rozov, E. T. Ruziev, A. A. Solnyshkin, T. N. Tran, E. A. Yakushev, B. S. Yuldashev
The yields of photonuclear reactions in the 107Ag, 113In, and 115In nuclei were measured. Monte Carlo simulations were performed using the Geant4 code, and the results were compared with the experimental values. The isomeric ratios of the yields in the reactions 107Ag(γ, n)106m,gAg and 113In(γ, n)112m,gIn were determined, and the cross sections for the reactions 107Ag(γ, n)106gAg and 107Ag(γ, 2n)105Ag at an energy of 20 MeV were calculated based on the experimental data.
{"title":"Interaction of photons with silver and indium nuclei at energies up to 20 MeV* * The authors express their gratitude to the team of the LINAC-200 electron accelerator and the management of the Joint Institute for Nuclear Research for their support in conducting the experiments.","authors":"J. H. Khushvaktov, M. A. Demichev, D. L. Demin, S. A. Evseev, M. I. Gostkin, V. V. Kobets, F. A. Rasulova, S. V. Rozov, E. T. Ruziev, A. A. Solnyshkin, T. N. Tran, E. A. Yakushev, B. S. Yuldashev","doi":"10.1088/1674-1137/ad1028","DOIUrl":"https://doi.org/10.1088/1674-1137/ad1028","url":null,"abstract":"The yields of photonuclear reactions in the <sup>107</sup>Ag, <sup>113</sup>In, and <sup>115</sup>In nuclei were measured. Monte Carlo simulations were performed using the Geant4 code, and the results were compared with the experimental values. The isomeric ratios of the yields in the reactions <sup>107</sup>Ag(<italic toggle=\"yes\">γ</italic>, <italic toggle=\"yes\">n</italic>)<sup>106<italic toggle=\"yes\">m</italic>,<italic toggle=\"yes\">g</italic>\u0000</sup>Ag and <sup>113</sup>In(<italic toggle=\"yes\">γ</italic>, <italic toggle=\"yes\">n</italic>)<sup>112<italic toggle=\"yes\">m</italic>,<italic toggle=\"yes\">g</italic>\u0000</sup>In were determined, and the cross sections for the reactions <sup>107</sup>Ag(<italic toggle=\"yes\">γ</italic>, <italic toggle=\"yes\">n</italic>)<sup>106<italic toggle=\"yes\">g</italic>\u0000</sup>Ag and <sup>107</sup>Ag(<italic toggle=\"yes\">γ</italic>, 2<italic toggle=\"yes\">n</italic>)<sup>105</sup>Ag at an energy of 20 MeV were calculated based on the experimental data.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"197 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139507021","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 : 2024-01-01DOI: 10.1088/1674-1137/ad0e03
Gang Lü, Chang-Chang Zhang, Yan-Lin Zhao, Li-Ying Zhang
We investigate CP violation in the decay process by considering the interference effects of , , and within the framework of the perturbative QCD method (P refers to π, K, η, and pseudoscalar mesons). We analyze the mixings of , , and and provide the amplitudes of the quasi-two-body decay processes. The CP violation for the decay process is obvious in the ranges of the three vector meson interferences. Meanwhile, the localized CP violation can be found to compare with the experimental results from the three-body decay process at the LHC in the near future.
{"title":"Resonant contribution of the three-body decay process in perturbative QCD* * Supported by the Natural Science Foundation of Henan Province, China (232300420115).","authors":"Gang Lü, Chang-Chang Zhang, Yan-Lin Zhao, Li-Ying Zhang","doi":"10.1088/1674-1137/ad0e03","DOIUrl":"https://doi.org/10.1088/1674-1137/ad0e03","url":null,"abstract":"We investigate <italic toggle=\"yes\">CP</italic> violation in the decay process <inline-formula>\u0000<tex-math><?CDATA $ bar B_{s} rightarrow phi(rho,omega) P rightarrow K^{+}K^{-}P $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M2.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> by considering the interference effects of <inline-formula>\u0000<tex-math><?CDATA $ phirightarrow K^{+}K^{-} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M3.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, <inline-formula>\u0000<tex-math><?CDATA $ rhorightarrow K^{+}K^{-} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M4.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, and <inline-formula>\u0000<tex-math><?CDATA $ omegarightarrow K^{+}K^{-} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M5.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>within the framework of the perturbative QCD method (<italic toggle=\"yes\">P</italic> refers to <italic toggle=\"yes\">π</italic>, <italic toggle=\"yes\">K</italic>, <italic toggle=\"yes\">η</italic>, and <inline-formula>\u0000<tex-math><?CDATA $ eta' $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M6.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> pseudoscalar mesons). We analyze the mixings of <inline-formula>\u0000<tex-math><?CDATA $ phi-rho^{0} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M7.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, <inline-formula>\u0000<tex-math><?CDATA $ phi-omega $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M8.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula>, and <inline-formula>\u0000<tex-math><?CDATA $ omega-rho^{0} $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M9.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> and provide the amplitudes of the quasi-two-body decay processes. The <italic toggle=\"yes\">CP</italic> violation for the <inline-formula>\u0000<tex-math><?CDATA $ bar B_{s} rightarrow K^{+}K^{-} P $?></tex-math>\u0000<inline-graphic xlink:href=\"cpc_48_1_013103_M10.jpg\" xlink:type=\"simple\"></inline-graphic>\u0000</inline-formula> decay process is obvious in the ranges of the three vector meson interferences. Meanwhile, the localized <italic toggle=\"yes\">CP</italic> violation can be found to compare with the experimental results from the three-body decay process at the LHC in the near future.","PeriodicalId":10250,"journal":{"name":"中国物理C","volume":"79 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139095537","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：