منابع مشابه
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An empirically successful mass formula derived long ago from hadronic string models is not explained by symmetries of the QCD lagrangian. Consider that M2 ρ − M2 π = M2 K∗ − M2 K to a few percent accuracy. We derive this and other equal spacing relations using chiral symmetry and a novel Z2 symmetry. We offer an interpretation of this Z2 symmetry as a manifestation of chiral anomalies in a gaug...
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We study electromagnetic mass splittings of charmed baryons. We point out discrepancies among theoretical predictions in non-relativistic potential models; none of these predictions seems supported by experimental data. A new calculation is presented. Quite a successful phenomenology has been obtained using non-relativistic potential models built in order to describe the low-energy limit of QCD...
متن کاملRadiative corrections to sfermion mass splittings.
We study the one-loop radiative corrections to the SU(2) breaking mass splittings between sfermions in SU(2) doublets in the Minimal Supersymmetric Standard Model. At tree-level, the differences of mass squared m f̃1L −m f̃2L of SU(2) doublet sfermions (f̃1, f̃2)L in the first two generations are determined by tanβ, and are universal to sleptons and squarks. The radiative correction, however, break...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1998
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.59.036001