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Title: Unitary constraints on neutral pion electroproduction

At large virtuality $Q^2$, the coupling to the vector meson production channels provides us with a natural explanation of the surprisingly large cross section of the neutral pion electroproduction recently measured at Jefferson Laboratory, without destroying the good agreement between the Regge pole model and the data at the real photon point. Lastly, elastic rescattering of the $$\pi^0$$ provides us with a way to explain why the node, that appears at $$t\sim -0.5$$~GeV$^2$ at the real photon point, disappears as soon as $Q^2$ differs from zero.
Authors:
 [1]
  1. Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Publication Date:
OSTI Identifier:
1003852
Report Number(s):
JLAB-THY--10-1161; DOE/OR/23177--1193; arXiv:1004.1949
Journal ID: ISSN 0370-2693; PYLBAJ; TRN: US1100526
Grant/Contract Number:
AC05-06OR23177
Type:
Accepted Manuscript
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 695; Journal Issue: 1-4; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; CEBAF ACCELERATOR; CROSS SECTIONS; ELECTROPRODUCTION; PHOTONS; PIONS; PIONS NEUTRAL; PRODUCTION; REGGE POLES; RESCATTERING; VECTOR MESONS exclusive photo-production; Regge poles and cuts