In this paper,we study the ρ-meson electromagnetic form factors(EMFFs)within the framework of the light-front quark model.The physical form factors G_(C,M,Q)(Q^(2))of the ρ-meson,as well as the charged square radius...In this paper,we study the ρ-meson electromagnetic form factors(EMFFs)within the framework of the light-front quark model.The physical form factors G_(C,M,Q)(Q^(2))of the ρ-meson,as well as the charged square radius<r^(2)>,the magnetic moment μ,and the quadrupole moment Q,are calculated,which describe the behaviors of EMFFs at zero momentum transfer.Using the type-Ⅱ replacement,we find that the zero-mode does contribute zero to the matrix element S_(00)^(+).It is found that the“M→M_(0)”replacement improves the angular condition remarkably,which permits different prescriptions of ρ-meson EMFFs to give the consistent results.The residual tiny violation of angular condition needs other explanations beyond the zero-mode contributions.Our results indicate that the relativistic effects or interaction internal structure are weaken in the zero-binding limit.This work is also applicable to other spin-1 particles.展开更多
A main goal of hadron physics is to understand the internal structure of mesons from their quark constituents.The electromagnetic form factors(EMFFs)serve as direct probes of the spatial distribution of charge and cur...A main goal of hadron physics is to understand the internal structure of mesons from their quark constituents.The electromagnetic form factors(EMFFs)serve as direct probes of the spatial distribution of charge and current,thereby providing essential insights into quark dynamics.Pseudoscalar mesons,for instance,pions and kaons,provide relatively clean systems for such investigations owing to their spinless character.The EMFFs of light mesons at low momentum transfers have been precisely measured,while the ones of heavy mesons and those at large momentum transfers remain largely uncertain,leaving gaps in understanding hadronic structure.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.11875122,12175025,and 12147102)Tongling University Talent Program(Grant No.R23100)。
文摘In this paper,we study the ρ-meson electromagnetic form factors(EMFFs)within the framework of the light-front quark model.The physical form factors G_(C,M,Q)(Q^(2))of the ρ-meson,as well as the charged square radius<r^(2)>,the magnetic moment μ,and the quadrupole moment Q,are calculated,which describe the behaviors of EMFFs at zero momentum transfer.Using the type-Ⅱ replacement,we find that the zero-mode does contribute zero to the matrix element S_(00)^(+).It is found that the“M→M_(0)”replacement improves the angular condition remarkably,which permits different prescriptions of ρ-meson EMFFs to give the consistent results.The residual tiny violation of angular condition needs other explanations beyond the zero-mode contributions.Our results indicate that the relativistic effects or interaction internal structure are weaken in the zero-binding limit.This work is also applicable to other spin-1 particles.
文摘A main goal of hadron physics is to understand the internal structure of mesons from their quark constituents.The electromagnetic form factors(EMFFs)serve as direct probes of the spatial distribution of charge and current,thereby providing essential insights into quark dynamics.Pseudoscalar mesons,for instance,pions and kaons,provide relatively clean systems for such investigations owing to their spinless character.The EMFFs of light mesons at low momentum transfers have been precisely measured,while the ones of heavy mesons and those at large momentum transfers remain largely uncertain,leaving gaps in understanding hadronic structure.
