Hadron tomography studies by generalized parton distributions and distribution amplitudes
1 KEK Theory Center, Institute of Particle and Nuclear Studies, KEK and Department of Particle and Nuclear Physics, Graduate University for Advanced Studies, 1-1, Ooho, Tsukuba, Ibaraki, 305-0801, Japan
2 J-PARC Branch, KEK Theory Center, Institute of Particle and Nuclear Studies, KEK and Theory Group, Particle and Nuclear Physics Division, J-PARC Center, 203-1, Shirakata, Tokai, Ibaraki, 319-1106, Japan
Published online: 12 April 2017
We discuss hadron-tomography studies for the nucleon and exotic hadrons by high-energy hadron reactions. First, the constituent-counting rule is explained for determining internal quark configurations of exotic-hadron candidates by scaling properties of high-energy exclusive cross sections. Next, possibilities are discussed for investigating the generalized parton distributions (GPDs) of the nucleon and exotic hadrons at J-PARC. In particular, we study hadronic 2 → 3 process p + p → N + π + B, exclusive Drell-Yan process, and exotic-hadron GPDs. For determining three-dimensional structure of unstable exotic hadrons, we consider s-t crossed quantities of the GPDs called generalized distribution amplitudes (GDAs), which can be investigated at KEKB.We explain possible studies of the GDAs by two-photon processes.
© The Authors, published by EDP Sciences, 2017
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