skip to main content

DOE PAGESDOE PAGES

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

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.
Authors:
;  [1] ;  [2]
  1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  2. Univ. of Utrecht (Netherlands)
Publication Date:
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
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)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; APPROXIMATIONS; ELECTROMAGNETIC FORM FACTORS; FORM FACTORS; HADRONS; PIONS