Unitary constraints on charged pion photoproduction at large p⊥
Journal Article
·
· Physics Letters. B
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Around $$\theta_{\pi}=$$90$$^\circ$$, the coupling to the $$\rho^\circ N$$ channel leads to a good accounting of the charged pion exclusive photoproduction cross section in the energy range 3 < Eγ < 10 GeV, where experimental data exist. Starting from a Regge Pole approach that successfully describes vector meson production, the singular part of the corresponding box diagrams (where the intermediate vector meson-baryon pair propagates on-shell) is evaluated without any further assumptions (unitarity). Such a treatment provides an explanation of the $$s^{-7}$$ scaling of the cross section. Furthermore, elastic rescattering of the charged pion improves the basic Regge pole model at forward and backward angles.
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
- Grant/Contract Number:
- AC05-06OR23177
- OSTI ID:
- 982215
- Alternate ID(s):
- OSTI ID: 21355790
- Report Number(s):
- DOE/OR/23177--1060; JLAB-THY--09-1112
- Journal Information:
- Physics Letters. B, Journal Name: Physics Letters. B Journal Issue: 2-3 Vol. 685; ISSN 0370-2693
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Exclusive π 0 electroproduction at W > 2 GeV with CLAS
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journal | August 2014 |
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