Unitary constraints on charged pion photoproduction at large p⊥

Laget, Jean-Marc

doi:10.1016/j.physletb.2010.01.052

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

Journal Article · Mon Jan 25 00:00:00 UTC 2010 · Physics Letters. B

DOI: https://doi.org/10.1016/j.physletb.2010.01.052 · OSTI ID:982215

Laget, Jean-Marc ^[1]

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 < 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.

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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

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

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Pion photoproduction on few body systems Laget, J. Physics Reports, Vol. 69, Issue 1 https://doi.org/10.1016/0370-1573(81)90164-2	journal	March 1981
Energy dependence of the elastic diffraction slopes Lasinski, T.; Levi Setti, R.; Schwarzschild, B. Nuclear Physics B, Vol. 37, Issue 1 https://doi.org/10.1016/0550-3213(71)90316-6	journal	February 1972
Perturbative QCD predictions for large momentum transfer photoproduction Farrar, Glennys R.; Huleihel, Khadra; Zhang, Huayi Nuclear Physics B, Vol. 349, Issue 3 https://doi.org/10.1016/0550-3213(91)90391-A	journal	February 1991
Photoproduction of vector mesons at large momentum transfer Laget, J. -M. Physics Letters B, Vol. 489, Issue 3-4 https://doi.org/10.1016/S0370-2693(00)00945-X	journal	September 2000
Real and virtual Compton scattering in a Regge approach Cano, F.; Laget, J. -M Physics Letters B, Vol. 551, Issue 3-4 https://doi.org/10.1016/S0370-2693(02)03075-7	journal	January 2003
Pseudoscalar meson photoproduction at high energies: from the Regge regime to the hard scattering regime Guidal, M.; Laget, J. -M.; Vanderhaeghen, M. Physics Letters B, Vol. 400, Issue 1-2 https://doi.org/10.1016/S0370-2693(97)00354-7	journal	May 1997
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Space-time structure of hard-scattering processes Laget, J. M. Physical Review D, Vol. 70, Issue 5 https://doi.org/10.1103/PhysRevD.70.054023	journal	September 2004
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Signatures of the handbag mechanism in wide-angle photoproduction of pseudoscalar mesons Huang, H. W.; Jakob, R.; Kroll, P. The European Physical Journal C, Vol. 33, Issue 1 https://doi.org/10.1140/epjc/s2003-01576-6	journal	March 2004

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Exclusive π 0 electroproduction at W > 2 GeV with CLAS Bedlinskiy, I.; Kubarovsky, V.; Niccolai, S. Physical Review C, Vol. 90, Issue 2 https://doi.org/10.1103/physrevc.90.025205	journal	August 2014

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

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