Pub Date : 2023-10-06DOI: 10.1142/s0217751x23501506
Ankita Kakoti, Bichitra Bijay Boruah, Mrinal Kumar Das
In this paper, we have realized the left-right symmetric model with modular symmetry. We have used $Gamma$(3) modular group which is isomorphic to non-abelian discrete symmetry group $A_4$. The advantage of using modular symmetry is the non-requirement for the use of extra particles called 'flavons'. In this model, the Yukawa couplings are expressed in terms of modular forms $(Y_1,Y_2,Y_3)$. In this work, we have studied minimal Left-Right Symmetric Model for both type-I and type-II dominances. Here, we have calculated the values for the Yukawa couplings and then plotted it against the sum of the neutrino masses. The results obtained are well within the experimental limits for the desired values of sum of neutrino masses. We have also briefly analyzed the effects of the implications of modular symmetry on neutrinoless double beta decay with the new physics contributions within Left-Right Symmetric Model.
{"title":"Minimal Left-Right Symmetric Model with <i>A</i><sub>4</sub> modular symmetry","authors":"Ankita Kakoti, Bichitra Bijay Boruah, Mrinal Kumar Das","doi":"10.1142/s0217751x23501506","DOIUrl":"https://doi.org/10.1142/s0217751x23501506","url":null,"abstract":"In this paper, we have realized the left-right symmetric model with modular symmetry. We have used $Gamma$(3) modular group which is isomorphic to non-abelian discrete symmetry group $A_4$. The advantage of using modular symmetry is the non-requirement for the use of extra particles called 'flavons'. In this model, the Yukawa couplings are expressed in terms of modular forms $(Y_1,Y_2,Y_3)$. In this work, we have studied minimal Left-Right Symmetric Model for both type-I and type-II dominances. Here, we have calculated the values for the Yukawa couplings and then plotted it against the sum of the neutrino masses. The results obtained are well within the experimental limits for the desired values of sum of neutrino masses. We have also briefly analyzed the effects of the implications of modular symmetry on neutrinoless double beta decay with the new physics contributions within Left-Right Symmetric Model.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135350368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-10-06DOI: 10.1142/s0217751x23501518
A. Naveena Kumara, Shreyas Punacha, Kartheek Hegde, C. L. Ahmed Rizwan, K.M. Ajith, Md Sabir Ali
Employing the free energy landscape, we study the phase transition and its dynamics for a class of regular black holes in Anti-de Sitter spacetime governed by the coupling of non-linear electrodynamics, which reduces to Hayward and Bardeen solutions for particular values of spacetime parameters. The Fokker-Planck equation is solved numerically by imposing the reflecting boundary condition and a suitable initial condition, using which, we investigate the probabilistic evolution of regular AdS black holes. In this approach, the on-shell Gibbs free energy is treated as a function of the radius of the event horizon, which happens to be the order parameter of the phase transition. The numerical solution is also obtained for the absorbing boundary condition. The dynamics of switching between the coexistence small black hole phase and large black hole phase due to the thermal fluctuation is probed by calculating the first passage time. The effect of temperature on the dynamical process is also investigated.
{"title":"Dynamics and kinetics of phase transition for regular AdS black holes in general relativity coupled to non-linear electrodynamics","authors":"A. Naveena Kumara, Shreyas Punacha, Kartheek Hegde, C. L. Ahmed Rizwan, K.M. Ajith, Md Sabir Ali","doi":"10.1142/s0217751x23501518","DOIUrl":"https://doi.org/10.1142/s0217751x23501518","url":null,"abstract":"Employing the free energy landscape, we study the phase transition and its dynamics for a class of regular black holes in Anti-de Sitter spacetime governed by the coupling of non-linear electrodynamics, which reduces to Hayward and Bardeen solutions for particular values of spacetime parameters. The Fokker-Planck equation is solved numerically by imposing the reflecting boundary condition and a suitable initial condition, using which, we investigate the probabilistic evolution of regular AdS black holes. In this approach, the on-shell Gibbs free energy is treated as a function of the radius of the event horizon, which happens to be the order parameter of the phase transition. The numerical solution is also obtained for the absorbing boundary condition. The dynamics of switching between the coexistence small black hole phase and large black hole phase due to the thermal fluctuation is probed by calculating the first passage time. The effect of temperature on the dynamical process is also investigated.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135350375","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-10-01DOI: 10.1142/s0217751x23501440
Wenyu Wang, Wu-Long Xu, Jin Min Yang
In direct dark matter (DM) detection via scattering off the electrons, the momentum transfer plays a crucial role. Previous work showed that for self-interacting DM, if the DM particle has a size (the so-called puffy DM), the radius effect could dominate the momentum transfer and become another source of velocity dependence for self-scattering cross-section. In this work, we investigate the direct detection of puffy DM particles with different radii through electron recoil. We find that comparing with the available experimental exclusion limits dominated by the mediator effect for XENON10, XENON100 and XENON1T, the constraints on the puffy DM-electron scattering cross-section become much weaker for large radius DM particles. For small-radius DM particles, the constraints remain similar to the point-like DM case.
{"title":"Direct detection of finite-size dark matter via electron recoil","authors":"Wenyu Wang, Wu-Long Xu, Jin Min Yang","doi":"10.1142/s0217751x23501440","DOIUrl":"https://doi.org/10.1142/s0217751x23501440","url":null,"abstract":"In direct dark matter (DM) detection via scattering off the electrons, the momentum transfer plays a crucial role. Previous work showed that for self-interacting DM, if the DM particle has a size (the so-called puffy DM), the radius effect could dominate the momentum transfer and become another source of velocity dependence for self-scattering cross-section. In this work, we investigate the direct detection of puffy DM particles with different radii through electron recoil. We find that comparing with the available experimental exclusion limits dominated by the mediator effect for XENON10, XENON100 and XENON1T, the constraints on the puffy DM-electron scattering cross-section become much weaker for large radius DM particles. For small-radius DM particles, the constraints remain similar to the point-like DM case.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135274980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-10-01DOI: 10.1142/s0217751x23410075
Rohit Tiwari, Juhi Oudichhya, Ajay Kumar Rai
The mass spectra of light-heavy tetraquarks [Formula: see text] ([Formula: see text]) are computed in a nonrelativistic diquark model with one-gluon exchange plus confining potential. In the diquark model, a [Formula: see text] state is regarded to be made of a light-heavy diquark ([Formula: see text]) and an antidiquark [Formula: see text] in antitriplet and triplet color configuration, respectively. The masses of charm mesons were calculated in order to fit the model parameters used to create the masses of tetraquarks and therefore enhance the model’s reliability. The masses of [Formula: see text] tetra-quark states are determined to be in the range of 3.8–4.7[Formula: see text]GeV, which is consistent with the experimentally reported charmonium-like states. In particular, the [Formula: see text], [Formula: see text] and [Formula: see text] tetraquarks, which have been seen experimentally, may all be described by our model.
{"title":"Mass-Spectra of Light-Heavy Tetraquarks","authors":"Rohit Tiwari, Juhi Oudichhya, Ajay Kumar Rai","doi":"10.1142/s0217751x23410075","DOIUrl":"https://doi.org/10.1142/s0217751x23410075","url":null,"abstract":"The mass spectra of light-heavy tetraquarks [Formula: see text] ([Formula: see text]) are computed in a nonrelativistic diquark model with one-gluon exchange plus confining potential. In the diquark model, a [Formula: see text] state is regarded to be made of a light-heavy diquark ([Formula: see text]) and an antidiquark [Formula: see text] in antitriplet and triplet color configuration, respectively. The masses of charm mesons were calculated in order to fit the model parameters used to create the masses of tetraquarks and therefore enhance the model’s reliability. The masses of [Formula: see text] tetra-quark states are determined to be in the range of 3.8–4.7[Formula: see text]GeV, which is consistent with the experimentally reported charmonium-like states. In particular, the [Formula: see text], [Formula: see text] and [Formula: see text] tetraquarks, which have been seen experimentally, may all be described by our model.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135368095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-09-29DOI: 10.1142/s0217751x23501464
B. K. Panda, S. Panda, A. K. Panda
{"title":"Mass Splitting and Decay Properties of B, B<sub>s</sub> and B<sub>c</sub> Mesons in a Dirac Formalism","authors":"B. K. Panda, S. Panda, A. K. Panda","doi":"10.1142/s0217751x23501464","DOIUrl":"https://doi.org/10.1142/s0217751x23501464","url":null,"abstract":"","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135133422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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}
{"title":"Surrogate Model of Particle Accelerators using Encoder-Decoder Neural Networks with Physical Regularization","authors":"Kunxiang Sun, Xiaolong Chen, Xiaoying Zhao, Xin Qi, Zhijun Wang, Yuan He","doi":"10.1142/s0217751x23501452","DOIUrl":"https://doi.org/10.1142/s0217751x23501452","url":null,"abstract":"","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135154394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-09-18DOI: 10.1142/s0217751x23501439
V. M. Khatsymovsky
This article is in the spirit of our work on the consequences of the Regge calculus, where some edge length scale arises as an optimal initial point of the perturbative expansion after functional integration over connection. Now consider the perturbative expansion itself. To obtain an algorithmizable diagram technique, we consider the simplest periodic simplicial structure with a frozen part of the variables ("hypercubic"). After functional integration over connection, the system is described by the metric $g_{lambda mu}$ at the sites. We parameterize $g_{lambda mu}$ so that the functional measure becomes Lebesgue. The discrete diagrams are finite and reproduce (for ordinary, non-Planck external momenta) those continuum counterparts that are finite. We give the parametrization of $g_{lambda mu}$ up to terms, providing, in particular, additional three-graviton and two-graviton-two-matter vertices, which can give additional one-loop corrections to the Newtonian potential. The edge length scale is $sim sqrt{ eta }$, where $eta$ defines the free factor $ ( - det | g_{lambda mu} | )^{ eta / 2}$ in the measure and should be a large parameter to ensure the true action after integration over connection. We verify the important fact that the perturbative expansion does not contain increasing powers of $eta$ if its initial point is chosen close enough to the maximum point of the measure, thus justifying this choice.
{"title":"On the gravitational diagram technique in the discrete setup","authors":"V. M. Khatsymovsky","doi":"10.1142/s0217751x23501439","DOIUrl":"https://doi.org/10.1142/s0217751x23501439","url":null,"abstract":"This article is in the spirit of our work on the consequences of the Regge calculus, where some edge length scale arises as an optimal initial point of the perturbative expansion after functional integration over connection. Now consider the perturbative expansion itself. To obtain an algorithmizable diagram technique, we consider the simplest periodic simplicial structure with a frozen part of the variables (\"hypercubic\"). After functional integration over connection, the system is described by the metric $g_{lambda mu}$ at the sites. We parameterize $g_{lambda mu}$ so that the functional measure becomes Lebesgue. The discrete diagrams are finite and reproduce (for ordinary, non-Planck external momenta) those continuum counterparts that are finite. We give the parametrization of $g_{lambda mu}$ up to terms, providing, in particular, additional three-graviton and two-graviton-two-matter vertices, which can give additional one-loop corrections to the Newtonian potential. The edge length scale is $sim sqrt{ eta }$, where $eta$ defines the free factor $ ( - det | g_{lambda mu} | )^{ eta / 2}$ in the measure and should be a large parameter to ensure the true action after integration over connection. We verify the important fact that the perturbative expansion does not contain increasing powers of $eta$ if its initial point is chosen close enough to the maximum point of the measure, thus justifying this choice.","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135154401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-09-15DOI: 10.1142/s0217751x23501415
A. Atangana Likene, J. M. Ema'a Ema'a, P. Ele Abiama, G. H. Ben-Bolie
{"title":"Quark confinement in Schwarzchild-like space-time with a metric generated by a non-gravitational Yukawa-like strong field","authors":"A. Atangana Likene, J. M. Ema'a Ema'a, P. Ele Abiama, G. H. Ben-Bolie","doi":"10.1142/s0217751x23501415","DOIUrl":"https://doi.org/10.1142/s0217751x23501415","url":null,"abstract":"","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135437632","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-09-15DOI: 10.1142/s0217751x23501403
M. O. Ribas, L. C. Bail, F. P. Devecchi
{"title":"Mapping between eras in scale-covariant gravity with a van der Waals cosmological source","authors":"M. O. Ribas, L. C. Bail, F. P. Devecchi","doi":"10.1142/s0217751x23501403","DOIUrl":"https://doi.org/10.1142/s0217751x23501403","url":null,"abstract":"","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135437980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 : 2023-09-15DOI: 10.1142/s0217751x23501427
Behnam Mohammadi, Elnaz Amirkhanlou
{"title":"Estimates of charm-mixing parameters in two body charm decays","authors":"Behnam Mohammadi, Elnaz Amirkhanlou","doi":"10.1142/s0217751x23501427","DOIUrl":"https://doi.org/10.1142/s0217751x23501427","url":null,"abstract":"","PeriodicalId":50309,"journal":{"name":"International Journal of Modern Physics a","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135437983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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