Isospin breaking in octet baryon mass splittings
نویسندگان
چکیده
منابع مشابه
Isospin splittings in the light-baryon octet from lattice QCD and QED.
While electromagnetic and up-down quark mass difference effects on octet baryon masses are very small, they have important consequences. The stability of the hydrogen atom against beta decay is a prominent example. Here, we include these effects by adding them to valence quarks in a lattice QCD calculation based on Nf=2+1 simulations with five lattice spacings down to 0.054 fm, lattice sizes up...
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Within the QCD sum-rule approach in an external field, we calculate the baryon matrix element of isovector-scalar current, HB = 〈B|uu−dd|B〉/2MB, for octet baryons, which appears in the response of the correlator of baryon interpolating fields to a constant isovector-scalar external field. The sum rules are obtained for a general baryon interpolating field with an appropriate form for the phenom...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2012
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.86.114511