Journal Article

FZJ-2016-07890

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Isospin splittings of meson and baryon masses from three-flavor lattice QCD + QED

Horsley, R. ; Nakamura, Y. ; Perlt, H. ; Pleiter, D.FZJ* ; Rakow, P. E. L. ; Schierholz, G. (Corresponding author) ; Schiller, A. ; Stokes, R. ; Stüben, H. ; Young, R. D. ; Zanotti, J. M.

2016
IOP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/0954-3899/43/10/10LT02

Abstract: Lattice QCD simulations are now reaching a precision where isospin breaking effects become important. Previously, we have developed a program to systematically investigate the pattern of flavor symmetry beaking within QCD and successfully applied it to meson and baryon masses involving up, down and strange quarks. In this Letter we extend the calculations to QCD + QED and present our first results on isospin splittings in the pseudoscalar meson and baryon octets. In particular, we obtain the nucleon mass difference of Mn - Mp = 1.35(18)(8)MeV and the electromagnetic contribution to the pion splitting Mπ+ Mπ4.60(20)MeV. Further we report first determination of the separation between strong and electromagnetic contributions in the MS scheme.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)
2. John von Neumann - Institut für Computing (NIC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)
2. Hadron physics from lattice QCD + QED (hde07_20161101) (hde07_20161101)

Appears in the scientific report 2016

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Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz ; No Authors Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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