منابع مشابه
Charm quark mass
We report on the result for the charm quark mass as obtained from our lattice QCD computation in the quenched approximation. Our result is mMS c (mc) = 1.26(4)(12) GeV. PACS: 11.15.Ha (Lattice gauge theory), 12.38.Gc (Lattice QCD calculations), 14.65.Dw (Charmed quark)
متن کاملPrecise Determinations of the Charm Quark Mass
In this contribution two recent analyses for the extraction of the charm quark mass are discussed. Although they rely on completely different experimental and theoretical input the two methods provide the same final results for the charm quark mass and have an uncertainty of about 1%.
متن کاملBottom Quark Mass from Υ Mesons: Charm Mass Effects
The effects of the finite charm quark mass on bottom quark mass determinations from Υ sum rules are examined in detail. The charm quark mass effects are calculated at next-to-next-toleading order in the non-relativistic power counting for the Υ sum rules and at order αs for the determination of the bottom MS mass. For the bottom 1S mass, which is extracted from the Υ sum rules directly, we obta...
متن کاملThe charm quark mass from non-relativistic sum rules
We present an analysis to determine the charm quark mass from nonrelativistic sum rules, using a combined approach taking into account fixed-order and effective-theory calculations. Non-perturbative corrections as well as higher-order perturbative corrections are under control. For the PS mass we find mPS(0.7 GeV) = 1.50± 0.04 GeV which translates into a MS mass of m = 1.25± 0.04 GeV.
متن کاملCharm-quark mass from weighted finite energy QCD sum rules
The running charm-quark mass in the MS scheme is determined from weighted finite energy QCD sum rules (FESR) involving the vector current correlator. Only the short distance expansion of this correlator is used, together with integration kernels (weights) involving positive powers of s, the squared energy. The optimal kernels are found to be a simple pinched kernel, and polynomials of the Legen...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2002
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)01371-5