arXiv:1012.0030·v1·High Energy Physics — Phenomenology
Baryon to meson transition distribution amplitudes and their spectral representation
Bernard Pire · Kirill Semenov-Tian-Shansky · Lech Szymanowski
Abstract
We consider the problem of construction of a spectral representation for nucleon to meson transition distribution amplitudes (TDAs), non-diagonal matrix elements of nonlocal three quark light-cone operators between a nucleon and a meson states. We introduce the notion of quadruple distributions and generalize Radyshkin's factorized Ansatz for this issue. Modelling of baryon to meson TDAs in the complete domain of their definition opens the way to quantitative estimates of cross-sections for various hard exclusive reactions.
Comments: Talk presented at International Workshop on Diffraction in High-Energy Physics DIFFRACTION 2010, September 10 - 15, 2010 Otranto (Lecce), Italy. 4 pages