Probing the nucleon's transversity and the photon's distribution amplitude in lepton pair photoproduction

Abstract

We describe a new way to access the chiral odd transversity parton distribution in the proton through the photoproduction of lepton pairs. The basic ingredient is the interference of the usual Bethe Heitler or Drell-Yan amplitudes with the amplitude of a process, where the photon couples to quarks through its chiral-odd distribution amplitude, which is normalized to the magnetic susceptibility of the QCD vacuum. A promising phenomenology of single and double spin observables emerges from the unusual features of this amplitude.

arXiv comment4 pages, 1 figure. Version 2 slightly modified, to be published in Phys. Rev. Letters; a few references added

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Cited by in corpus (15)

• Numerical study of chiral symmetry breaking in non-Abelian gauge theory with background magnetic field
• Magnetic Susceptibility of the Quark Condensate and Polarization from Chiral Models
• Chiral magnetization of non-Abelian vacuum: a lattice study
• The Chiral Magnetic Effect and chiral symmetry breaking in SU(3) quenched lattice gauge theory
• Hard photoproduction of a diphoton with a large invariant mass
• Photoproduction of a pi rhoT pair with a large invariant mass and transversity generalized parton distribution
• Quark Matter in a Strong Magnetic Background
• Neutrino-production of a charmed meson and the transverse spin structure of the nucleon
• Successes and Failures of a More Comprehensive Hard Wall AdS/QCD
• Transverse strange quark spin structure of the nucleon
• QCD magnetic susceptibility at finite temperature beyond the chiral limit
• Photon Distribution Amplitudes in nonlocal chiral quark model
• Gluon poles and photon distribution amplitudes in Drell-Yan-like processes
• Chiral-odd generalized parton distributions for the low-lying octet baryons
• New ways to access the transverse spin content of the nucleon