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28 March 2024
 
  » arxiv » 1008.0721

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A spectral representation for baryon to meson and baryon to photon transition distribution amplitudes
Bernard Pire ; Kirill Semenov-Tian-Shansky ; Lech Szymanowski ;
Date 4 Aug 2010
AbstractWe construct a spectral representation for the transition distribution amplitudes (TDAs), i.e. matrix elements of three quark correlators which arise e.g. in the description of baryon to meson and baryon to photon transitions within the factorization approach to hard exclusive reactions. We generalize for these quantities the notion of double distributions introduced in the context of generalized parton distributions. We propose the generalization of A.Radyushkin’s factorized Ansatz for the case of baryon to meson and baryon to photon TDAs. Our construction opens the way to modeling of baryon to meson and baryon to photon TDAs in their complete domain of definition and quantitative estimates of cross-sections for various hard exclusive reactions.
Source arXiv, 1008.0721
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