Threshold neutral pion photoproduction off the tri-nucleon to O(q^4)
Nuclear Theory
2013-02-22 v2 High Energy Physics - Phenomenology
Abstract
We calculate electromagnetic neutral pion production off tri-nucleon bound states (3H, 3He) at threshold in chiral nuclear effective field theory to fourth order in the standard heavy baryon counting. We show that the fourth order two-nucleon corrections to the S-wave multipoles at threshold are very small. This implies that a precise measurement of the S-wave cross section for neutral pion production off 3He allows for a stringent test of the chiral perturbation theory prediction for the S-wave electric multipole E_{0+}^{pi0 n}.
Keywords
Cite
@article{arxiv.1209.2661,
title = {Threshold neutral pion photoproduction off the tri-nucleon to O(q^4)},
author = {Mark Lenkewitz and Evgeny Epelbaum and H. -W. Hammer and Ulf-G. Meißner},
journal= {arXiv preprint arXiv:1209.2661},
year = {2013}
}
Comments
17 pages, 5 figures, title changed, final version to appear in EPJA. arXiv admin note: substantial text overlap with arXiv:1103.3400