The kaon off-shell generalized parton distributions and transverse momentum dependent parton distributions
arXiv:2509.01854 · doi:10.3390/particles8040085
Abstract
We investigate the off-shell generalized parton distributions (GPDs) {and transverse momentum dependent parton distributions (TMDs)} of kaons within the framework of the Nambu--Jona-Lasinio model, employing proper time regularization. {Compared to the pion case, the off-shell effects in kaons are of similar magnitude, modifying the GPDs by about --, which is notable. The absence of crossing symmetry leads to odd powers in the -moments of the off-shell GPDs, giving rise to new off-shell form factors.} We analyze the relations among these kaon off-shell form factors by analogy with electromagnetic form factors. Our results extend the off-shell GPDs from pions to kaons and simultaneously address the associated off-shell form factors. We also compare the off-shell and on-shell gravitational form factors of the kaon. In addition, the off-shell kaon TMD shows a stronger dependence on the momentum fraction than its on-shell counterpart.
11 pages, 12 figures; accepted by Particles
References in corpus (51)
- NJL-model analysis of dense quark matter
- Wave Functions, Evolution Equations and Evolution Kernels from Light-Ray Operators of QCD
- Generalized Parton Distributions
- Deeply Virtual Compton Scattering
- Nonforward Parton Distributions
- Hard Exclusive Reactions and the Structure of Hadrons
- Scaling Limit of Deeply Virtual Compton Scattering
- Off-Forward Parton Distributions
- Extended NJL Model for light and heavy mesons without q-qbar thresholds
- Timelike Compton scattering: exclusive photoproduction of lepton pairs
- Pion and Kaon Structure at the Electron-Ion Collider
- The Stability of Nuclear Matter in the Nambu-Jona-Lasinio Model
- Generalized parton distributions of the pion in chiral quark models and their QCD evolution
- Diquark confinement in an extended NJL model
- Generalized parton distributions of the pion in a Bethe-Salpeter approach
- Deeply Virtual Meson Production on the nucleon
- Role of diquark correlations and the pion cloud in nucleon elastic form factors
- Flavour dependence of the pion and kaon form factors and parton distribution functions
- Transversity quark distributions in a covariant quark-diquark model
- Gravitational form factors of light mesons
- NJL model on the light cone and pion structure function
- Exclusive production of a pair of high transverse momentum photons in pion-nucleon collisions for extracting generalized parton distributions
- Pion transverse momentum dependent parton distributions in the Nambu and Jona-Lasinio model
- Contact interaction analysis of pion GTMDs
- Towards a fitting procedure to deeply virtual meson production -- the next-to-leading order case --
- Critical endpoint in the presence of a chiral chemical potential
- TMDs of Spin-one Targets: Formalism and Covariant Calculations
- Measures of pion and kaon structure from generalised parton distributions
- Quark distrbutions in the nucleon based on a relativistic 3-body approach to the NJL model
- Axial vector diquark correlations in the nucleon: Structure functions and static properties
- First-time measurement of Timelike Compton Scattering
- Spatial and Momentum Imaging of the Pion and Kaon
- Pion Parton Distributions in a non local Lagrangian
- Rho meson form factors in a confining Nambu--Jona-Lasinio model
- An introductory lecture on Generalised Parton Distributions
- A Model for the Off-forward Structure Functions of the Pion
- Dressed Quark Mass Dependence of Pion and Kaon Form Factors
- Determination of the generalized parton distributions through the analysis of the world electron scattering data considering two-photon exchange corrections
- Charge Symmetry Breaking Effects in Pion and Kaon Structure
- Baryon Octet Electromagnetic Form Factors in a confining NJL model
- Pion nucleus Drell-Yan process and parton transverse momentum in the pion
- NLO corrections to the deeply virtual meson production revisited: impact on the extraction of generalized parton distributions
- Off-shell generalized parton distributions and form factors of the pion
- Determination of generalized parton distributions through a simultaneous analysis of axial form factor and wide-angle Compton scattering data
- Exclusive dilepton production via timelike Compton scattering in heavy ion collisions
- Regularization dependence of pion generalised parton distributions
- Generalized quasi, Ioffe-time, and pseudo quark distributions of the pion in the Nambu--Jona-Lasinio model
- Timelike Compton scattering in ultraperipheral collisions
- Scalar, Vector and Tensor Form Factors of Pion and Kaon
- Parton distribution functions of ground state mesons composed of or quarks
- Tomography of the Rho meson in the QCD Instanton Vacuum: Transverse Momentum Dependent Parton Distribution Functions