Electromagnetic proton–neutron mass difference

Tomalak, Oleksandr

doi:10.1140/epjp/s13360-020-00413-9

Title: Electromagnetic proton–neutron mass difference

Journal Article · Tue May 19 00:00:00 EDT 2020 · European Physical Journal Plus

DOI:https://doi.org/10.1140/epjp/s13360-020-00413-9· OSTI ID:1546035

^[1]

Johannes Gutenberg Univ., Mainz (Germany); Univ. of Kentucky, Lexington, KY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

In this paper, we discuss the Cottingham formula and evaluate the proton–neutron electromagnetic mass difference exploiting the state-of-the-art phenomenological input.We decompose individual contributions to the mass splitting into Born, inelastic and subtraction terms. We evaluate the subtraction-function contribution connecting the input based on experimental data with the operator product expansion matched to QCD which allows us to avoid model dependence and to reduce errors of this contribution. We evaluate inelastic and Born terms accounting for modern low-$Q^2$ data.

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Research Organization:: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP); German Research Foundation (DFG); National Institute of Standards and Technology (NIST); Universities Research Association

Grant/Contract Number:: AC02-07CH11359; SC0019095

OSTI ID:: 1546035

Report Number(s):: arXiv:1810.02502; FERMILAB-PUB-19-216-V; oai:inspirehep.net:1697118

Journal Information:: European Physical Journal Plus, Vol. 135, Issue 6; ISSN 2190-5444

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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References (37)

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