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Title: Primakoff effect in η-photoproduction off protons

Abstract

In this paper, we analyse data on forward η -meson photoproduction off a proton target and extract the η → γγ decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our analysis is strongly constrained because it is fixed from a global fit to available γp → pη data for differential cross-sections and polarizations. Finally, we compare our results with present information on the two-photon η-decay from the literature. We provide predictions for future PrimEx experiments at Jefferson Laboratory in order to motivate further studies.

Authors:
;  [1];  [1];  [2]
  1. Forschungszentrum Julich, Julich (Germany)
  2. Univ. Bonn, Bonn (Germany); Forschungszentrum Julich, Julich (Germany)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1005092
Report Number(s):
JLAB-THY-10-1126; DOE/OR/23177-1123; arXiv:1001.0646
Journal ID: ISSN 1434-6001; TRN: US1101082
Grant/Contract Number:  
AC05-06OR23177
Resource Type:
Accepted Manuscript
Journal Name:
European Physical Journal. A
Additional Journal Information:
Journal Volume: 44; Journal Issue: 2; Journal ID: ISSN 1434-6001
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; CEBAF ACCELERATOR; DECAY; DIFFERENTIAL CROSS SECTIONS; PHOTOPRODUCTION; PRIMAKOFF EFFECT; PROTONS; TARGETS

Citation Formats

A. Sibirtsev, Haidenbauer, J., Krewald, S., and MeiBner, U. -G. Primakoff effect in η-photoproduction off protons. United States: N. p., 2010. Web. doi:10.1140/epja/i2010-10961-7.
A. Sibirtsev, Haidenbauer, J., Krewald, S., & MeiBner, U. -G. Primakoff effect in η-photoproduction off protons. United States. doi:10.1140/epja/i2010-10961-7.
A. Sibirtsev, Haidenbauer, J., Krewald, S., and MeiBner, U. -G. Fri . "Primakoff effect in η-photoproduction off protons". United States. doi:10.1140/epja/i2010-10961-7. https://www.osti.gov/servlets/purl/1005092.
@article{osti_1005092,
title = {Primakoff effect in η-photoproduction off protons},
author = {A. Sibirtsev and Haidenbauer, J. and Krewald, S. and MeiBner, U. -G.},
abstractNote = {In this paper, we analyse data on forward η -meson photoproduction off a proton target and extract the η → γγ decay width utilizing the Primakoff effect. The hadronic amplitude that enters into our analysis is strongly constrained because it is fixed from a global fit to available γp → pη data for differential cross-sections and polarizations. Finally, we compare our results with present information on the two-photon η-decay from the literature. We provide predictions for future PrimEx experiments at Jefferson Laboratory in order to motivate further studies.},
doi = {10.1140/epja/i2010-10961-7},
journal = {European Physical Journal. A},
number = 2,
volume = 44,
place = {United States},
year = {2010},
month = {3}
}

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Cited by: 6 works
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