dispersive evaluation of the d-term form factor in deeply virtual compton scattering

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ID: 157291
2014
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Abstract
We present a dispersive representation of the D-term form factor for hard exclusive reactions, using unsubtracted t-channel dispersion relations. The t-channel unitarity relation is saturated with the contribution of two-pion intermediate states, using the two-pion distributions amplitude for the γ⁎γ→ππ subprocess and reconstructing the ππ→NN¯ subprocess from available information on pion-nucleon partial-wave helicity amplitudes. Results for the D-term form factor as function of t as well as at t=0 are discussed in comparison with available model predictions and phenomenological parametrizations. Keywords: Dispersion relations, Deeply virtual Compton scattering, Generalized parton distributions
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pasquini2014physicsdispersive Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors B. Pasquini, M.V. Polyakov, M. Vanderhaeghen
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Journal ACS chemical biology
Year 2014
DOI
DOI not found
URL
http://www.sciencedirect.com/science/article/pii/S0370269314007709
Keywords
physics

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