Abstract
We prove a 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 good agreement with the SLAC data for the structure function F2p(W, Q2) for W2≤1.4 GeV2 and 9≤Q2≤30.7 GeV2.
Original language | English (US) |
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Journal | Physical review letters |
Volume | 87 |
Issue number | 2 |
DOIs | |
State | Published - Jun 20 2001 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy