Electroproduction of tensor mesons in QCD

Abstract

Due to multiple possible polarizations hard exclusive production of tensor mesons by virtual photons or in heavy meson decays offers interesting possibilities to study the helicity structure of the underlying short-distance process. Motivated by the first measurement of the transition form factor ${\gamma }^{\ast }\gamma \to f_2(1270)$ at large momentum transfers by the BELLE collaboration we present an improved QCD analysis of this reaction in the framework of collinear factorization including contributions of twist-three quark-antiquark-gluon operators and an estimate of soft end-point corrections using light-cone sum rules. The results appear to be in a very good agreement with the data, in particular the predicted scaling behavior is reproduced in all cases.

arXiv comment27 pages, 5 figures

References in corpus (22)

• The Uses of Conformal Symmetry in QCD
• Measurement of the gamma gamma* --> pi0 transition form factor
• Probing partonic structure in gamma* gamma -> pi pi near threshold
• Measurement of gamma gamma* --> pi0 transition form factor at Belle
• Towards the glueball spectrum from unquenched lattice QCD
• Twist-3 Distribution Amplitudes of K* and phi Mesons
• Exclusive production of pion pairs in gamma^* gamma collisions at large Q^2
• Measurement of the gamma gamma* --> eta and gamma gamma* --> eta' transition form factors
• Twist-4 Distribution Amplitudes of the K${}^{\ast }$ and $\varphi$ Mesons in QCD
• Helicity-Flip Off-Foward Parton Distributions of the Nucleon
• Meson--photon transition form factors and resonance cross-sections in e^+ e^- collisions
• High-statistics measurement of neutral-pion pair production in two-photon collisions
• High-statistics measurement of neutral-pion pair production in two-photon collisions
• Measurement of the eta and etaprime transition form factors at q^2=112 GeV^2
• Study of ${\pi }^0$ pair production in single-tag two-photon collisions
• Properties of the tensor mesons $f_2(1270)$ and $f_2^{\prime }(1525)$
• B to Light Tensor Meson Form Factors Derived from Light-Cone Sum Rules
• NLO corrections and contribution of a tensor gluon operator to the process ${\gamma }^{\ast }\gamma \to \pi \pi$
• Hard Exclusive Production of Tensor Mesons
• Exclusive Radiative Decays of Upsilon in SCET
• Power corrections to the process $\gamma {\gamma }^{\ast }\to \pi \pi$ in the Light-Cone Sum Rules approach
• Study of the $f_2(1270)$ and $a_2(1320)$ resonances in ${\gamma }^{\ast }(Q^2)\gamma$ collisions

Cited by in corpus (8)

• Hadron tomography by generalized distribution amplitudes in pion-pair production process ${\gamma }^{\ast }\gamma \to {\pi }^0{\pi }^0$ and gravitational form factors for pion
• Asymptotic behavior of meson transition form factors
• Subleading power corrections to the pion-photon transition form factor in QCD
• A study of the gamma* - f0(980) transition form factors
• Perturbative QCD Analysis of Exclusive Processes $e^{+}{e}^{-}\to VP$ and $e^{+}{e}^{-}\to TP$
• B $\to f_2(1270)$ form factors with light-cone sum rules
• Production of $f_2(1270)$ meson in $pp$ collisions at the LHC via gluon-gluon fusion in the $k_t$-factorization approach
• Tensor Meson Pole contributions to the HLbL piece of $a_{\mu }$ within R$\chi$T