Roy, D. P. (1969) Gauge invariance, duality, and Nα-Nγ exchange degeneracy in photoproduction Physical Review Letters, 23 (24). pp. 1417-1419. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v23/i24/p1417_1
Related URL: http://dx.doi.org/10.1103/PhysRevLett.23.1417
Abstract
From gauge invariance and duality we obtain an exchange degeneracy between Nα and Nγ contributions to pion photoproduction, which is exact for u=M2 but approximate for u≈0. This may account for the absence of the wrong-signature dip in backward photoproduction.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 42811 |
| Deposited On: | 06 Jun 2011 13:01 |
| Last Modified: | 06 Jun 2011 13:01 |
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