πNTDAs from charmonium production in association with a forward pion at P̅ANDA

B Ma,B Pire,L Szymanowski,K Semenov-Tian-Shansky

doi:10.1051/epjconf/20147305006

Abstract

Charmonium production in association with a forward or backward pion in nucleon-antinucleon annihilation is one of the most promising reaction to access nucleon-to-pion transition distribution amplitudes (TDAs) at PANDA. We briefly review the description of this reaction in terms of \pi N TDAs within the collinear factorization approach and present the first results of dedicated feasibility studies for the PANDA experimental setup.

Highlights

Baryon-to-meson transition distribution amplitudes (TDAs) [1,2,3,4,5,6,7] are universal non-perturbative objects which share common features both with generalized parton distributions (GPDs) and baryon distribution amplitudes (DAs) and arise in the collinear factorized description of several classes of hard exclusive reactions.Dedicated studies of hard exclusive reactions providing access to baryon-to-meson TDAs were suggested [8] as a part of the future experimental program of P ANDA facility [9], which is currently under construction at GSI-FAIR
We briefly review the description of this reaction in terms of N TDAs within the collinear factorization approach and present the first results of dedicated feasibility studies for the P ANDA experimental setup
Detailed feasibility studies of the corresponding reactions are of major importance since measurements at P ANDA will give the unique opportunity to check explicitly the universality [11] of baryon-to-meson TDAs providing information on the time-like regime, which is complementary to that from the lepton beam induced reactions, which can be studied e.g. at JLab [2, 6]

Summary

Introduction

Baryon-to-meson transition distribution amplitudes (TDAs) [1,2,3,4,5,6,7] are universal non-perturbative objects which share common features both with generalized parton distributions (GPDs) and baryon distribution amplitudes (DAs) and arise in the collinear factorized description of several classes of hard exclusive reactions.Dedicated studies of hard exclusive reactions providing access to baryon-to-meson TDAs were suggested [8] as a part of the future experimental program of P ANDA facility [9], which is currently under construction at GSI-FAIR. Charmonium production in association with a forward or backward pion in nucleon-antinucleon annihilation is one of the most promising reaction to access nucleonto-pion transition distribution amplitudes (TDAs) at P ANDA. We briefly review the description of this reaction in terms of N TDAs within the collinear factorization approach and present the first results of dedicated feasibility studies for the P ANDA experimental setup.

Results

Conclusion