Probing axial quark generalized parton distributions through exclusive photoproduction of a γπ± pair with a large invariant mass

A bstract Exclusive photoproduction of a γπ ± pair in the kinematics where the pair has a large invariant mass and the final nucleon has a small transverse momentum is described in the collinear factorization framework. The scattering amplitude is calculated at leading order in α s and the different...

Full description

Saved in:
Bibliographic Details
Published inThe journal of high energy physics Vol. 2018; no. 11; pp. 1 - 44
Main Authors Duplančić, G., Passek-Kumerički, K., Pire, B., Szymanowski, L., Wallon, S.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2018
Springer Nature B.V
SpringerOpen
Subjects
Classical and Quantum Gravitation
Cross-sections
Elementary Particles
High energy physics
Invariants
Kinematics
Photoproduction
Physics
Physics and Astronomy
QCD Phenomenology
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Regular Article - Theoretical Physics
Relativity Theory
Scattering amplitude
String Theory
Transverse momentum
QCD Phenomenology
Online AccessGet full text

Cover

More Information
Summary:A bstract Exclusive photoproduction of a γπ ± pair in the kinematics where the pair has a large invariant mass and the final nucleon has a small transverse momentum is described in the collinear factorization framework. The scattering amplitude is calculated at leading order in α s and the differential cross sections for the process are estimated in the kinematics of the JLab 12-GeV experiments. The order of magnitude of the predicted cross-sections seems sufficient for a dedicated experiment to be performed. The process turns out to be very sensitive to the axial generalized parton distribution combination H ˜ u − H ˜ d .
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP11(2018)179