Lattice determination of Sigma-Lambda mixing

Horsley, R, Najjar, J, Nakamura, Y, Perlt, H, Pleiter, D, Rakow, Paul ORCID: 0000-0003-4486-2158, Schierholz, G, Schiller, A, Stüben, H and Zanotti, JM (2015) Lattice determination of Sigma-Lambda mixing. Physical Review D, 91 (7). 074512-1-074512-22.

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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.

Item Type:	Article
Additional Information:	40 pages, 5 figures, published version
Uncontrolled Keywords:	hep-lat, hep-lat, hep-ph
Depositing User:	Symplectic Admin
Date Deposited:	07 Dec 2018 14:31
Last Modified:	19 Jan 2023 01:09
DOI:	10.1103/PhysRevD.91.074512
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3029664