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Type: Journal article
Title: Lattice determination of Sigma-Lambda mixing
Author: Horsley, R.
Najjar, J.
Nakamura, Y.
Perlt, H.
Pleiter, D.
Rakow, P.
Schierholz, G.
Schiller, A.
Stüben, H.
Zanotti, J.
Citation: Physical Review D, 2015; 91(7):074512-1-074512-22
Publisher: American Physical Society
Issue Date: 2015
ISSN: 1550-7998
Statement of
R. Horsley, J. Najjar, Y. Nakamura, H. Perlt, D. Pleiter, P.E.L. Rakow, G. Schierholz, A. Schiller, H. Stüben, and J.M. Zanotti
Abstract: Isospin breaking effects in baryon octet (and decuplet) masses are due to a combination of up and down quark mass differences and electromagnetic effects and lead to small mass splittings. Between the Sigma and Lambda this mass splitting is much larger, this being mostly due to their different wave functions. However when isospin is broken, there is a mixing between these states. We describe the formalism necessary to determine the QCD mixing matrix and hence find the mixing angle and mass splitting between the Sigma and Lambda particles due to QCD effects.
Rights: © 2015 American Physical Society
RMID: 0030028348
DOI: 10.1103/PhysRevD.91.074512
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Appears in Collections:Physics publications

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