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Soft pion theorem for hard near threshold pion production

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arxiv hep-ph/0101279 v3 pith:CU4XR3L6 submitted 2001-01-24 hep-ph hep-exnucl-th

classification hep-phhep-exnucl-th
keywords piontheoremnearproductionsoftthresholdamplitudeshard
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We prove new soft pion theorem for the near threshold pion production by a hard electromagnetic probe. This theorem relates various near threshold pion production amplitudes to the nucleon distribution amplitudes. The new soft pion theorem is in a good agreement with the SLAC data for F_2^p(W,Q^2) for W^2 < 1.4 GeV^2 and 7 < Q^2 < 30.7 GeV^2.

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  1. Toward an advanced phenomenology of $\pi N$ transition distribution amplitudes

    hep-ph 2025-06 conditional novelty 7.0 of 10

    A flexible two-component model of pion-nucleon transition distribution amplitudes is fitted to CLAS data and used to predict cross-sections and three leading-twist spin asymmetries for backward pion electroproduction.

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