Exclusive production of $\varphi$ meson in the ${\gamma }^{\ast }p\to \varphi p$ reaction at large photon virtualities within $k_T$-factorization approach

Abstract

We apply the $k_T$-factorization approach to the production of $\varphi$ meson in deep-inelastic scattering. The helicity-conserving ${\gamma }^{\ast }(T,L)\to \varphi$ impact factor is calculated for longitudinal and transverse photon polarization using $\varphi$ meson distribution amplitudes. Different unintegrated gluon distributions are used in the calculations. The formalism for massless quarks/antiquarks gives too large transverse and longitudinal cross sections for photon virtualities below $Q^2\sim 8{\mathrm{GeV}}^2$. We suggest how to improve the description of the HERA data by introducing effective strange quark masses into the formalism. We derive the corresponding massive impact factor by comparing to the light-cone wave function representation used in previous $k_T$-factorization calculations and the color-dipole approaches. As a byproduct we present expressions for higher twist-amplitudes as weighted integrals over the light-cone wave function. The quark mass $m_q\approx 0.5$ GeV allows to improve the description of both longitudinal and transverse cross section down to $Q^2\sim$ 4 GeV${}^2$. We present also the polarized cross section ratio ${\sigma }_L/{\sigma }_T$ and the behavior of the total cross section ${\sigma }_{tot}={\sigma }_L+{\sigma }_T$ as a function of photon virtuality.

16 pages, 12 figures

References in corpus (17)

• Saturation Effects in Deep Inelastic Scattering at low $Q^2$ and its Implications on Diffraction
• Higher Twist Distribution Amplitudes of Vector Mesons in QCD: Formalism and Twist Three Distributions
• Off-diagonal distributions fixed by diagonal partons at small $x$ and $\xi$
• Colour dipoles and rho, phi electroproduction
• Diffractive Electroproduction of rho and phi Mesons at HERA
• Diffractive Vector Meson Production at HERA: from Soft to Hard QCD
• QCD factorization of exclusive processes beyond leading twist: gamma*T -> rhoT impact factor with twist three accuracy
• Electroproduction of two light vector mesons in the next-to-leading approximation
• Anatomy of the differential gluon structure function of the proton from the experimental data on F_2p
• Parton distribution amplitudes of light vector mesons
• Measurement of elastic electroproduction of phi mesons at HERA
• Splitting the pomeron into two jets: a novel process at HERA
• A phenomenological study of helicity amplitudes of high energy exclusive leptoproduction of the rho meson
• The impact factor for the virtual photon to light vector meson transition
• The diffraction cone for exclusive vector meson production in deep inelastic scattering
• Exclusive photoproduction of $\varphi$ meson in $\gamma p\to \varphi p$ and $pp\to p\varphi p$ reactions
• Exclusive production of $\omega$ meson in proton-proton collisions at high energies

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