No Sommerfeld resummation factor in e+e- -> ppbar ?
High Energy Physics - Phenomenology
2015-05-19 v1
Abstract
The Sommerfeld rescattering formula is compared to the e+e- -> ppbar BaBar data at threshold and above. While there is the expected Coulomb enhancement at threshold, two unexpected outcomes have been found: |G^p (4M_p^2)|= 1, like for a pointlike fermion, and moreover data show that the resummation factor in the Sommerfeld formula is not needed. Other e+e- -> baryon-antibaryon cross sections show a similar behavior near threshold.
Cite
@article{arxiv.1008.0542,
title = {No Sommerfeld resummation factor in e+e- -> ppbar ?},
author = {Rinaldo Baldini Ferroli and Simone Pacetti and Adriano Zallo},
journal= {arXiv preprint arXiv:1008.0542},
year = {2015}
}
Comments
9 pages, 6 figures