Article
Physics, Multidisciplinary
Hao-Ze Tong, Hao-Song Li
Summary: In this study, the masses of the doubly bottom baryons and charmed-bottom baryons are investigated up to O(p(3)) in heavy baryon chiral perturbation theory. The unknown low energy constants in the quark model and lattice QCD are determined. The numerical results for the masses of these baryons are presented up to O(p(3)).
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Physics, Particles & Fields
Gabriela Barenboim, Jessica Turner, Ye-Ling Zhou
Summary: The study demonstrates that non-zero neutrino masses can be generated from gravitational interactions. By solving the Schwinger-Dyson equations, the scale of neutrino condensate and the number of new particle degrees of freedom required for gravitationally induced dynamical chiral symmetry breaking are determined. It is shown that for minimal beyond the Standard Model particle content, the condensation scale occurs close to the Planck scale.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Aaron Park, Su Houng Lee
Summary: In this study, we investigate the color-spin interaction energy of a quark, diquark, and baryon with their surrounding baryons and/or quark matter. We categorize all possible flavor and spin states of the resulting multiquark configuration in both flavor SU(2) and SU(3) symmetric cases. The findings suggest that the interaction energy is lowest for a single surrounding baryon for the baryon, but lowest for multiple baryons or a quark gas for the quark. The study also provides a quark model basis for the quarkyoniclike phase in dense matter.
Article
Physics, Particles & Fields
Hui-Hui Duan, Yong-Lu Liu, Ming-Qiu Huang
Summary: In this study, the semileptonic decay processes of Λ(b) -> Λ(c) are analyzed using the light-cone sum rule approach. The form factors of the Λ(b) baryon transition matrix element are calculated using the light-cone distribution amplitudes obtained from the QCD sum rule in the heavy quark effective field theory framework. The results are consistent with the newest experimental result and other theoretical calculations and predictions.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Physics, Particles & Fields
Hang Liu, Zhi-Peng Xing, Chang Yang
Summary: We study the semileptonic and nonleptonic decays of doubly heavy baryons induced by the s -> u transition. The hadronic form factors are calculated using the light front quark model, and we analyze the decay modes of doubly heavy baryons using helicity amplitudes. Our results provide benchmark values for various observables and suggest that these decays are likely detectable in experiments such as LHCb. The potential data accumulated in the future can further enhance our understanding of the decay mechanism in the presence of two heavy quarks.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Astronomy & Astrophysics
Volodymyr Vovchenko, Volker Koch
Summary: A framework is developed to relate proton number cumulants measured in heavy-ion collisions to baryon number susceptibilities. The experimental results suggest that the rapidity acceptance dependence of proton cumulants is consistent with a thermal emission model, and the extracted baryon number susceptibilities exhibit a hierarchical structure. However, considering the effect of baryon number conservation presents challenges in describing the experimental data at large rapidity acceptances.
Article
Astronomy & Astrophysics
R. N. Faustov, V. O. Galkin
Summary: In this study, the relativistic quark model based on the quark-diquark picture and the quasipotential approach in QCD is employed to investigate the properties of triply heavy baryons. The masses of Omega(ccc), Omega(bbb), Omega(ccb), and Omega(cbb) baryons in their ground and excited states are calculated, taking into account the orbital and radial excitations between the diquark and quark, as well as between the quarks inside the diquark. The internal structure of the diquark is consistently considered through the form factor of the diquark-gluon interaction, expressed by the overlap integral of the diquark wave functions. A detailed comparison with previous calculations is provided.
Article
Astronomy & Astrophysics
Sobhan Kazempour, Amin Rezaei Akbarieh, Emmanuel N. Saridakis
Summary: In this work, we extend the quasi-dilaton massive gravity theory by including the aether field. We demonstrate the existence of exact self-accelerating solutions in flat Friedmann-Lemaitre-Robertson-Walker geometry, characterized by an effective cosmological constant. Through perturbation analysis, we investigate the stability conditions for gravitational waves and the vector and scalar perturbations, showing the regions in the parameter space where the obtained solutions are free from ghost instabilities and strong coupling problem.
Article
Physics, Nuclear
Yan Miao, Hui Deng, Ke-Sheng Huang, Jing Gao, Yue-Long Shen
Summary: In this study, we calculate the transition form factors of Lambda(b) decaying into Lambda(c) using the framework of light-cone sum rules. We investigate different interpolation currents and distribution amplitude models, and present numerical predictions consistent with experimental data.
Article
Astronomy & Astrophysics
Zhen-Xing Zhao, Fu-Wei Zhang, Xiao-Hui Hu, Yu-Ji Shi
Summary: In this work, a three-quark picture is constructed using a bottom-up approach for baryons in a light-front quark model. The shape parameters, which characterize the momentum distribution inside a baryon, are determined with the help of the pole residue of the baryon. The relation between the three-quark picture and the diquark picture is clarified. When building the model, it is found that Lorentz boost plays a crucial role, and the bottom-up modeling approach can be generalized to multiquark states. Based on this, a unified theoretical framework for describing multiquark states may be established.
Article
Astronomy & Astrophysics
Stefan Groote, Mikhail A. Ivanov, Jurgen G. Korner, Valery E. Lyubovitskij, Pietro Santorelli, Chien-Thang Tran
Summary: In the semileptonic decays of heavy mesons and baryons, the lepton-mass dependence plays a role in the quadratic terms of the cosine distribution, known as the convexity parameter. This observation provides a way to test lepton universality independently of form-factor effects. By defining optimized partial rates, one can investigate how new physics effects may affect the identity of the rates in different lepton modes.
Article
Astronomy & Astrophysics
T. M. Aliev, S. Bilmis, M. Savci
Summary: In this study, we analyzed weak decays induced by J(P) = 1/2(+) -> 3/2(-) transitions and investigated the decay processes of bottom baryons. The form factors for the transitions were obtained and used to calculate the decay widths. Our findings were found to be consistent with experimental measurements and were compared with predictions from other approaches.
Article
Physics, Particles & Fields
Constanza Osses, Nelson Videla, Grigoris Panotopoulos
Summary: Research on cosmological inflation and its dynamics within the Randall-Sundrum II brane model, analyzing four representative small-field inflationary potentials, constraining parameters for a viable inflationary Universe, investigating consistency with the Swampland Criteria, and providing predictions for reheating duration and temperature.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Astronomy & Astrophysics
Hang Liu, Wei Wang, Zhi-Peng Xing
Summary: Inspired by recent anomalies in lepton flavor universalities, this study investigates baryonic form factors induced by heavy-to-light tensor currents. Using the light-front quark model, the tensor form factors are calculated, and momentum distributions are obtained using two parameterization forms. Numerical results for the form factors at q2 = 0 are derived, and parameters in q2 distributions are obtained through extrapolation. The findings are helpful for analyzing new physics contributions in heavy-to-light transitions.
Article
Astronomy & Astrophysics
Wei Wang, Zhi-Peng Xing
Summary: In this study, we analyze weak decays of the triply heavy baryon Omega(++)(ccc) and calculate the form factors for Omega(++)(ccc)-> Xi(++)(cc) / Omega(+)(cc) transitions using a light front quark model. We predict the decay branching fractions for semi-leptonic decays and investigate forward-backward asymmetry and angular distributions. We also estimate the branching fractions for a few color-allowed processes and highlight the importance of the Omega(++)(ccc)-> Omega(+)(cc)pi(+) channel for the discovery of Omega(++)(ccc). This analysis provides a useful reference for future experimental searches.
