Diffractive $\varphi$ Production in a Perturbative QCD Model

Abstract

The elastic leptoproduction of $\varphi$ measured by the H1 collaboration at HERA is described by a perturbative QCD model, based on open $s\bar{s}$ production and parton hadron duality, proposed by Martin et al. We observe that both the total cross section and the ratio of the longitudinal and transverse cross sections are well reproduced with an effective strange-quark mass $m_s\sim 320-380$ MeV for various gluon distribution functions. Possible connection of the effective mass and the momentum dependent dynamical mass associated with dynamical breaking of chiral symmetry is also discussed.

Text revised, one figure added

References in corpus (8)

• HERA Collider Physics
• Q^2 dependence of diffractive vector meson electroproduction
• Measurement of elastic electroproduction of phi mesons at HERA
• Diffraction in Deep Inelastic Scattering
• The QCD description of diffractive processes
• Light Quark Masses 99
• Psi' to J/Psi Ratio in Diffractive Photoproduction
• Validity of the Color Dipole Approximation for Diffractive Production of Heavy Quarkonium