Unitary constraints on charged pion photoproduction at large p⊥

doi:10.1016/j.physletb.2010.01.052

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

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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:

Laget, Jean-Marc ^[1]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Publication Date:: 2010-01-25

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.

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                    Laget, Jean-Marc. Unitary constraints on charged pion photoproduction at large p⊥.  United States.  doi:10.1016/j.physletb.2010.01.052.

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                    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.

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@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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DOI: 10.1016/j.physletb.2010.01.052

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