Soft pion theorem for hard near threshold pion production

Details Soft pion theorem for hard near threshold pion production Soft pion theorem for hard near threshold pion production

2001-01-24

arxiv.org/abs/hep-ph/0101279v3

Phys.Rev.Lett. 87 (2001) 022001

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, revised version, more general analysis

Scientific paper

10.1103/PhysRevLett.87.022001

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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