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Title: Unitary constraints on charged pion photoproduction at large p⊥

Abstract

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 < E γ < 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.

Authors:
 [1]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
982215
Report Number(s):
JLAB-THY-09-1112; DOE/OR/23177-1060
Journal ID: ISSN 0370-2693; TRN: US201013%%913
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 685; Journal Issue: 2-3; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ACCOUNTING; BASIC; COUPLING; CROSS SECTIONS; DIAGRAMS; ENERGY RANGE; EXPERIMENTAL DATA; PHOTOPRODUCTION; PIONS; PRODUCTION; REGGE POLES; RESCATTERING; SCALING; UNITARITY; VECTOR MESONS; VECTORS

Citation Formats

Laget, Jean-Marc. Unitary constraints on charged pion photoproduction at large p⊥. United States: N. p., 2010. Web. doi:10.1016/j.physletb.2010.01.052.
Laget, Jean-Marc. Unitary constraints on charged pion photoproduction at large p⊥. United States. doi:10.1016/j.physletb.2010.01.052.
Laget, Jean-Marc. Mon . "Unitary constraints on charged pion photoproduction at large p⊥". United States. doi:10.1016/j.physletb.2010.01.052. https://www.osti.gov/servlets/purl/982215.
@article{osti_982215,
title = {Unitary constraints on charged pion photoproduction at large p⊥},
author = {Laget, Jean-Marc},
abstractNote = {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.},
doi = {10.1016/j.physletb.2010.01.052},
journal = {Physics Letters. Section B},
number = 2-3,
volume = 685,
place = {United States},
year = {2010},
month = {1}
}

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