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Title: Two-photon exchange corrections to the pion form factor

Abstract

Here, we compute two-photon exchange corrections to the electromagnetic form factor of the pion, taking into account the finite size of the pion. Compared to the soft-photon approximation for the infrared divergent contribution which neglects hadron structure effects, the corrections are found to be ≲ 1% for small Q 2 (Q 2 < 0.1 GeV 2), but increase to several percent for Q 2 ≳ 1 GeV 2 at extreme backward angles.

Authors:
;  [1];  [2]
+ Show Author Affiliations
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Univ. of Utrecht (Netherlands)
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:
983652
Report Number(s):
JLAB-THY-09-1106; arXiv:0911.3619; DOE/OR/23177-1050
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US1004596
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review. C, Nuclear Physics
Additional Journal Information:
Journal Volume: 81; Journal ID: ISSN 0556-2813
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; APPROXIMATIONS; ELECTROMAGNETIC FORM FACTORS; FORM FACTORS; HADRONS; PIONS

Citation Formats

Peter G. Blunden, Melnitchouk, Wally, and Tjon, John A. Two-photon exchange corrections to the pion form factor. United States: N. p., 2010. Web. doi:10.1103/PhysRevC.81.018202.
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Peter G. Blunden, Melnitchouk, Wally, & Tjon, John A. Two-photon exchange corrections to the pion form factor. United States. doi:10.1103/PhysRevC.81.018202.
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Peter G. Blunden, Melnitchouk, Wally, and Tjon, John A. Wed . "Two-photon exchange corrections to the pion form factor". United States. doi:10.1103/PhysRevC.81.018202. https://www.osti.gov/servlets/purl/983652.
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@article{osti_983652,
title = {Two-photon exchange corrections to the pion form factor},
author = {Peter G. Blunden and Melnitchouk, Wally and Tjon, John A.},
abstractNote = {Here, we compute two-photon exchange corrections to the electromagnetic form factor of the pion, taking into account the finite size of the pion. Compared to the soft-photon approximation for the infrared divergent contribution which neglects hadron structure effects, the corrections are found to be ≲ 1% for small Q2 (Q2 < 0.1 GeV2), but increase to several percent for Q2 ≳ 1 GeV2 at extreme backward angles.},
doi = {10.1103/PhysRevC.81.018202},
journal = {Physical Review. C, Nuclear Physics},
number = ,
volume = 81,
place = {United States},
year = {2010},
month = {1}
}
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Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI:  10.1103/PhysRevC.81.018202
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Cited by: 11 works
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