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arXiv · 1008.0542

No Sommerfeld resummation factor in e+e- -> ppbar ?

Rinaldo Baldini Ferroli·Simone Pacetti·Adriano Zallo
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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.

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Rinaldo Baldini Ferroli, Simone Pacetti, Adriano Zallo. 2010-08-03. No Sommerfeld resummation factor in e+e- -> ppbar ?. https://doi.org/10.1140/epja/i2012-12033-6

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