The Strange Quark Mass From Finite Energy Sum Rules
نویسنده
چکیده
The strange quark mass is determined from a study of the correlator 〈0|T (
منابع مشابه
Tau-Decay Determination of the Strange Quark Mass
The precise numerical value of the strange quark mass is a controversial issue, with important implications for low-energy phenomenology. The Particle Data Group [1] quotes a rather wide range of ms values, reflecting the large uncertainties in the present determinations of this parameter from QCD Sum Rules and Lattice calculations. The high precision data on tau decays [2] collected at LEP and...
متن کاملThe strange quark mass from scalar sum rules updated
A precise determination of the strange quark mass, being one of the fundamental parameters in the Standard Model (SM), is of paramount interest in several areas of present day particle phenomenology. Until today two main methods have been employed to achieve this task. QCD sum rules [2] have been applied to various channels containing strange quantum numbers, in particular the scalar channel th...
متن کاملBottom-quark mass from finite energy QCD sum rules
Finite energy QCD sum rules involving both inverse and positive moment integration kernels are employed to determine the bottom quark mass. The result obtained in the MS scheme at a reference scale of 10GeV is mb(10GeV) = 3623(9)MeV. This value translates into a scale invariant mass mb(mb) = 4171(9)MeV. This result has the lowest total uncertainty of any method, and is less sensitive to a numbe...
متن کاملمحاسبه ساختار ستاره کوارکی
In this paper, we have considered that the strange-star consists of quark matter from its center to surface. For quark matter, we have used two models, the MIT bag model and string-flip like model. In the bag model, the energy of the system has been considered the kinetic energy of the particles of system in addition to a constant B. We have considered two states for B, one of them is constant...
متن کاملThe Strange-Quark Mass From QCD Sum Rules: An Update
Three different ways of determining the strange quark mass using QCD sum rules are reviewed. First, from a QCD sum rule determination of the up and down quark masses, together with the current algebra ratio ms/(mu+ md). Second and third, from QCD sum rules involving the strangeness changing vector and axial-vector current divergences, respectively. Present results are encompassed in the value: ...
متن کامل