Ground-state energy of pionic hydrogen to one loop

A. Rusetsky (Bern University; Comenius University); E. Lipartia (Lund University; J. Gasser (Bern University); JINR Dubna; M.A. Ivanov (JINR Dubna); M. Mojzis (Massachusetts University; Tbilisi University)

REVIEW

Ground-state energy of pionic hydrogen to one loop

Not yet reviewed by Pith; the record is open.

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv hep-ph/0206068 v2 submitted 2002-06-06 hep-ph

J. Gasser (Bern University) , M.A. Ivanov (JINR Dubna) , E. Lipartia (Lund University , JINR Dubna , Tbilisi University) , M. Mojzis (Massachusetts University , Comenius University) , A. Rusetsky (Bern University This is my paper · ORCID

classification hep-ph

keywords energyexpansionframeworkground-statehydrogenlow-energynext-to-leadingorder

0 comments

read the original abstract

We investigate the ground-state energy of the pi- p atom (pionic hydrogen) in the framework of QCD+QED. In particular, we evaluate the strong energy-level shift. We perform the calculation at next-to-leading order in the low-energy expansion in the framework of the relevant effective field theory. The result provides a relation between the strong energy shift and the pion-nucleon S-wave scattering lengths - evaluated in pure QCD - at next-to-leading order in isospin breaking and in the low-energy expansion. We compare our result with available model calculations.

Discussion (0). Continue with ORCID to comment.

Pith tools