Pub Date : 2024-07-31DOI: 10.1088/1674-1137/ad3d4c
Liang-Kai Wu, 良凯 吴, Han Tang, 涵 汤, Ning Li, 宁 李, Xin-Yang Wang and 昕杨 王
We present a lattice QCD determination of masses of the conjectured H-dibaryon, denoted as , at nine different temperatures: 0.24, 0.63, 0.76, 0.84, 0.95, 1.09, 1.27, 1.52, and 1.90. The masses of baryons N, Σ, Ξ, and Λ at different temperatures were also computed. The simulations were performed on an anisotropic lattice with flavours of clover fermion at a quark mass corresponding to . The thermal ensembles were provided by the FASTSUM collaboration, whereas the zero temperature ensembles were provided by the Hadspec collaboration. We also calculated the spectral density of the correlation function of those particles. The spectral density distributions show a rich peak structure at the lowest temperature; at intermediate temperatures, the mass values of those particles obtained by the extrapolation method reflect a two-peak structure. While the spectral density for the octet baryon becomes smooth at 1.27, 1.52, and 1.90, the spectral density for the H-dibaryon becomes smooth at . At , the mass difference of the H-dibaryon and Λ pair, expressed as , was estimated to be MeV, which suggests the existence of a bound H-dibaryon state.
{"title":"Masses of the conjectured H-dibaryon at different temperatures*","authors":"Liang-Kai Wu, 良凯 吴, Han Tang, 涵 汤, Ning Li, 宁 李, Xin-Yang Wang and 昕杨 王","doi":"10.1088/1674-1137/ad3d4c","DOIUrl":"https://doi.org/10.1088/1674-1137/ad3d4c","url":null,"abstract":"We present a lattice QCD determination of masses of the conjectured H-dibaryon, denoted as , at nine different temperatures: 0.24, 0.63, 0.76, 0.84, 0.95, 1.09, 1.27, 1.52, and 1.90. The masses of baryons N, Σ, Ξ, and Λ at different temperatures were also computed. The simulations were performed on an anisotropic lattice with flavours of clover fermion at a quark mass corresponding to . The thermal ensembles were provided by the FASTSUM collaboration, whereas the zero temperature ensembles were provided by the Hadspec collaboration. We also calculated the spectral density of the correlation function of those particles. The spectral density distributions show a rich peak structure at the lowest temperature; at intermediate temperatures, the mass values of those particles obtained by the extrapolation method reflect a two-peak structure. While the spectral density for the octet baryon becomes smooth at 1.27, 1.52, and 1.90, the spectral density for the H-dibaryon becomes smooth at . At , the mass difference of the H-dibaryon and Λ pair, expressed as , was estimated to be MeV, which suggests the existence of a bound H-dibaryon state.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519022","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 : 2024-07-31DOI: 10.1088/1674-1137/ad4018
Qianchuan Wang, 乾川 王, Junji Jia and 俊基 贾
The periapsis shift of charged test particles in arbitrary static and spherically symmetric charged spacetimes are studied. Two perturbative methods, the near-circular approximation and post-Newtonian methods, are developed and shown to be very accurate when the results are determined to high orders. The near-circular approximation method is more precise when eccentricity e of the orbit is small, whereas the post-Newtonian method is more effective when orbit semilatus rectum p is large. Results from these two methods are shown to agree when both e is small and p is large. These results are then applied to the Reissner-Nordström spacetime, the Einstein-Maxwell-dilation gravity, and a charged wormhole spacetime. The effects of various parameters on the periapsis shift, particularly that of the electrostatic interaction, are carefully studied. The periapsis shift data of the solar-Mercury are then used to constrain the charges of the Sun and Mercury, and the data of the Sgr A*-S2 periapsis shift are used to determine, for the first time using this method, the constraints of the charges of Sgr A* and S2.
研究了带电测试粒子在任意静态和球对称带电时空中的周向位移。提出了两种微扰方法，即近圆近似法和后牛顿法，并证明当结果确定到高阶时，这两种方法非常精确。当轨道偏心率 e 较小时，近圆近似法更为精确，而当轨道半径 p 较大时，后牛顿法更为有效。结果表明，当 e 较小和 p 较大时，这两种方法的结果是一致的。然后将这些结果应用于赖斯纳-诺德斯特伦时空、爱因斯坦-麦克斯韦膨胀引力和带电虫洞时空。我们仔细研究了各种参数对近间隔位移的影响，特别是静电相互作用的影响。然后利用太阳-水星的近地点移动数据来约束太阳和水星的电荷，并利用 Sgr A*-S2 近地点移动的数据来确定 Sgr A* 和 S2 的电荷约束，这是第一次使用这种方法。
{"title":"Periapsis shift in spherically symmetric spacetimes and effects of electric interactions*","authors":"Qianchuan Wang, 乾川 王, Junji Jia and 俊基 贾","doi":"10.1088/1674-1137/ad4018","DOIUrl":"https://doi.org/10.1088/1674-1137/ad4018","url":null,"abstract":"The periapsis shift of charged test particles in arbitrary static and spherically symmetric charged spacetimes are studied. Two perturbative methods, the near-circular approximation and post-Newtonian methods, are developed and shown to be very accurate when the results are determined to high orders. The near-circular approximation method is more precise when eccentricity e of the orbit is small, whereas the post-Newtonian method is more effective when orbit semilatus rectum p is large. Results from these two methods are shown to agree when both e is small and p is large. These results are then applied to the Reissner-Nordström spacetime, the Einstein-Maxwell-dilation gravity, and a charged wormhole spacetime. The effects of various parameters on the periapsis shift, particularly that of the electrostatic interaction, are carefully studied. The periapsis shift data of the solar-Mercury are then used to constrain the charges of the Sun and Mercury, and the data of the Sgr A*-S2 periapsis shift are used to determine, for the first time using this method, the constraints of the charges of Sgr A* and S2.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141531267","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 : 2024-07-31DOI: 10.1088/1674-1137/ad34bc
Muhammad Arslan, Tahira Yasmeen, Saba Shafaq, Ishtiaq Ahmed and Muhammad Jamil Aslam
Recently, the experimental measurements of the branching ratios and different polarization asymmetries for processes occurring through flavor-changing-charged current transitions by BABAR, Belle, and LHCb have revealed some significant differences from the corresponding Standard Model (SM) predictions. This has triggered an interest to search for physics beyond the SM in the context of various new physics (NP) models and using the model-independent weak effective Hamiltonian (WEH). Assuming left-handed neutrinos, we add the dimension-six vector, (pseudo-)scalar, and tensor operators with complex Wilson coefficients (WCs) to the SM WEH. Using 60%, 30%, and 10% constraints resulting from the branching ratio of , we reassess the parametric space of these new physics WCs accommodating the current anomalies based on the most recent HFLAV data of and and Belle data of and . We find that the allowed parametric region of left-handed scalar couplings strongly depends on the constraints of the branching ratio, and the maximum pull from the SM predictions results from the <60% branching ratio limit. Also, the parametric region changes significantly if we extend the analysis by adding LHCb data of and . Furthermore, due to the large uncertainties in the measurements of and , we derive the sum rules which complement them with and . Using the best-fit points of the new complex WCs along with the latest measurements of , we predict the numerical values of the observable , , and from the sum rules. The simultaneous dependence of abovementioned physical observables on the NP WCs is established by plotting their correlation with and , which are useful to discriminate between various NP scenarios. We find that the most significant impact of NP results from the WC . Finally, we study the impact of these NP couplings on various angular and triple product asymmetries that could be measured in some ongoing and future experiments. The precise measurements of these observables are important to check the SM and extract the possible NP.
{"title":"Analysis of anomalies using weak effective Hamiltonian with complex couplings and their impact on various physical observables","authors":"Muhammad Arslan, Tahira Yasmeen, Saba Shafaq, Ishtiaq Ahmed and Muhammad Jamil Aslam","doi":"10.1088/1674-1137/ad34bc","DOIUrl":"https://doi.org/10.1088/1674-1137/ad34bc","url":null,"abstract":"Recently, the experimental measurements of the branching ratios and different polarization asymmetries for processes occurring through flavor-changing-charged current transitions by BABAR, Belle, and LHCb have revealed some significant differences from the corresponding Standard Model (SM) predictions. This has triggered an interest to search for physics beyond the SM in the context of various new physics (NP) models and using the model-independent weak effective Hamiltonian (WEH). Assuming left-handed neutrinos, we add the dimension-six vector, (pseudo-)scalar, and tensor operators with complex Wilson coefficients (WCs) to the SM WEH. Using 60%, 30%, and 10% constraints resulting from the branching ratio of , we reassess the parametric space of these new physics WCs accommodating the current anomalies based on the most recent HFLAV data of and and Belle data of and . We find that the allowed parametric region of left-handed scalar couplings strongly depends on the constraints of the branching ratio, and the maximum pull from the SM predictions results from the <60% branching ratio limit. Also, the parametric region changes significantly if we extend the analysis by adding LHCb data of and . Furthermore, due to the large uncertainties in the measurements of and , we derive the sum rules which complement them with and . Using the best-fit points of the new complex WCs along with the latest measurements of , we predict the numerical values of the observable , , and from the sum rules. The simultaneous dependence of abovementioned physical observables on the NP WCs is established by plotting their correlation with and , which are useful to discriminate between various NP scenarios. We find that the most significant impact of NP results from the WC . Finally, we study the impact of these NP couplings on various angular and triple product asymmetries that could be measured in some ongoing and future experiments. The precise measurements of these observables are important to check the SM and extract the possible NP.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519020","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 : 2024-07-31DOI: 10.1088/1674-1137/ad2a61
Ya Guo, 亚 郭, Hiroaki Nakajima, Wenbin Lin and 文斌 林
We study wave equations with various spins on the background of a general spherically symmetric spacetime. We obtain the unified expression of the Teukolsky-like master equations and the corresponding radial equations with the general spins. We also discuss the gauge dependence in the gravitational-wave equations, which have appeared in previous studies.
{"title":"Teukolsky-like equations with various spins in spherically symmetric spacetime*","authors":"Ya Guo, 亚 郭, Hiroaki Nakajima, Wenbin Lin and 文斌 林","doi":"10.1088/1674-1137/ad2a61","DOIUrl":"https://doi.org/10.1088/1674-1137/ad2a61","url":null,"abstract":"We study wave equations with various spins on the background of a general spherically symmetric spacetime. We obtain the unified expression of the Teukolsky-like master equations and the corresponding radial equations with the general spins. We also discuss the gauge dependence in the gravitational-wave equations, which have appeared in previous studies.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141504095","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 : 2024-07-31DOI: 10.1088/1674-1137/ad446a
T. M. Aliev, S. Bilmis and M. Savci
We estimate the coupling constants and decay widths of the partners of the hyperon, as discovered by the BELLE Collaboration, using the distribution amplitudes of the octet baryons within the light cone sum rules method. Our study includes a comparison of the obtained results for the relevant decay widths with those derived within the framework of the flavor analysis. We observe a good agreement between the predictions of both approaches. Moreover, our result on the decay width of is compatible with the existing experimental result within the uncertainties of the model predictions. These results can provide helpful insights for determining the nature of the partners of the baryon.
我们使用光锥和规则方法中的八重子分布振幅来估算 BELLE 协作发现的超子伙伴的耦合常数和衰变宽度。我们的研究包括将获得的相关衰变宽度结果与在味道分析框架内得出的结果进行比较。我们发现这两种方法的预测结果非常一致。此外，在模型预测的不确定性范围内，我们关于衰变宽度的结果与现有的实验结果是一致的。这些结果可以为确定重子伙伴的性质提供有益的启示。
{"title":"Analysis of strong decays of SU(3) partners of Ω(2012) baryon","authors":"T. M. Aliev, S. Bilmis and M. Savci","doi":"10.1088/1674-1137/ad446a","DOIUrl":"https://doi.org/10.1088/1674-1137/ad446a","url":null,"abstract":"We estimate the coupling constants and decay widths of the partners of the hyperon, as discovered by the BELLE Collaboration, using the distribution amplitudes of the octet baryons within the light cone sum rules method. Our study includes a comparison of the obtained results for the relevant decay widths with those derived within the framework of the flavor analysis. We observe a good agreement between the predictions of both approaches. Moreover, our result on the decay width of is compatible with the existing experimental result within the uncertainties of the model predictions. These results can provide helpful insights for determining the nature of the partners of the baryon.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141532642","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 : 2024-07-31DOI: 10.1088/1674-1137/ad47a8
Xiao-Rong Ma, 小荣 马, Shuai Sun, 帅 孙, Rong An, 荣 安, Li-Gang Cao and 李刚 曹
A correlation between the charge radii difference of mirror partner nuclei and the slope parameter L of symmetry energy has been built to ascertain the equation of state of isospin asymmetric nuclear matter. In this work, the influences of pairing correlations and isoscalar compression modulus on the are systematically investigated based on the Skyrme energy density functional theory. The calculated results suggest that the linear correlation between and L is decreased by the surface pairing correlations. The slope parameter deduced from the difference of charge radii of mirror-pair nuclei 32Ar-32Si, 36Ca-36S, 38Ca-38Ar, and 54Ni-54Fe falls into the range of − MeV, that is, the rather soft equation of state of asymmetric nuclear matter. Besides, the range of the slope parameter can also be influenced by the effective forces classified by various isoscalar incompressibility coefficients.
我们建立了镜像伙伴核的电荷半径差与对称能斜率参数 L 之间的相关性，从而确定了等空间不对称核物质的状态方程。在这项工作中，基于 Skyrme 能量密度泛函理论，系统地研究了配对相关性和等速压缩模量对等速压缩模量的影响。计算结果表明，表面配对相关性降低了和 L 之间的线性相关性。从镜像对核 32Ar-32Si、36Ca-36S、38Ca-38Ar 和 54Ni-54Fe 的电荷半径差推导出的斜率参数落在 - MeV 的范围内，即相当软的非对称核物质状态方程。此外，斜率参数的范围还可能受到按不同等压不可压缩系数分类的有效作用力的影响。
{"title":"Correlation between the charge radii difference in mirror partner nuclei and thesymmetry energy slope*","authors":"Xiao-Rong Ma, 小荣 马, Shuai Sun, 帅 孙, Rong An, 荣 安, Li-Gang Cao and 李刚 曹","doi":"10.1088/1674-1137/ad47a8","DOIUrl":"https://doi.org/10.1088/1674-1137/ad47a8","url":null,"abstract":"A correlation between the charge radii difference of mirror partner nuclei and the slope parameter L of symmetry energy has been built to ascertain the equation of state of isospin asymmetric nuclear matter. In this work, the influences of pairing correlations and isoscalar compression modulus on the are systematically investigated based on the Skyrme energy density functional theory. The calculated results suggest that the linear correlation between and L is decreased by the surface pairing correlations. The slope parameter deduced from the difference of charge radii of mirror-pair nuclei 32Ar-32Si, 36Ca-36S, 38Ca-38Ar, and 54Ni-54Fe falls into the range of − MeV, that is, the rather soft equation of state of asymmetric nuclear matter. Besides, the range of the slope parameter can also be influenced by the effective forces classified by various isoscalar incompressibility coefficients.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519023","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 : 2024-07-31DOI: 10.1088/1674-1137/ad39cf
Xuan Liu, 旋 刘, Jia-Jie Jiang, 佳杰 江, Xun Chen, 勋 陈, Mitsutoshi Fujita and Akira Watanabe
Gauge/gravity duality is used to study the properties of the doubly heavy baryon at finite rapidity and temperature in heavy-ion collisions. We investigate the impact of rapidity on string breaking and screening of and compare these effects with the results for in detail. Computations reveal that the string-breaking distances of and are close in the confined state, and the effects of rapidity and temperature on the string breaking are not significant. An interesting result shows that cannot be determined at sufficiently high temperatures and rapidities. However, can exist under any conditions as long as the separation distance is sufficiently small. Furthermore, the screening distances of and are compared at finite rapidity and temperature. Based on the above analysis, we infer that is more stable than at finite rapidity and temperature.
{"title":"Moving doubly heavy baryon in a strongly coupled plasma via holography*","authors":"Xuan Liu, 旋 刘, Jia-Jie Jiang, 佳杰 江, Xun Chen, 勋 陈, Mitsutoshi Fujita and Akira Watanabe","doi":"10.1088/1674-1137/ad39cf","DOIUrl":"https://doi.org/10.1088/1674-1137/ad39cf","url":null,"abstract":"Gauge/gravity duality is used to study the properties of the doubly heavy baryon at finite rapidity and temperature in heavy-ion collisions. We investigate the impact of rapidity on string breaking and screening of and compare these effects with the results for in detail. Computations reveal that the string-breaking distances of and are close in the confined state, and the effects of rapidity and temperature on the string breaking are not significant. An interesting result shows that cannot be determined at sufficiently high temperatures and rapidities. However, can exist under any conditions as long as the separation distance is sufficiently small. Furthermore, the screening distances of and are compared at finite rapidity and temperature. Based on the above analysis, we infer that is more stable than at finite rapidity and temperature.","PeriodicalId":10250,"journal":{"name":"Chinese Physics C","volume":null,"pages":null},"PeriodicalIF":3.6,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141519021","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}
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