Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-05-24
Eur.Phys.J.C22:31-38,2001
Physics
High Energy Physics
High Energy Physics - Phenomenology
LaTex, 8 pages, 4 figures (EPS)
Scientific paper
10.1007/s100520100791
Quark mass corrections to the tau hadronic width play a significant role only for the strange quark, hence providing a method for determining its mass. The experimental input is the vector plus axial-vector strange spectral function derived from a complete study of tau decays into strange hadronic final states performed by ALEPH. New results on strange decay modes from other experiments are also incorporated. The present analysis determines the strange quark mass at the Mtau mass scale using moments of the spectral function. Justified theoretical constraints are applied to the nonperturbative components and careful attention is paid to the treatment of the perturbative expansions of the moments which exhibit convergence problems. The result obtained, m_s(Mtau^2) = (120 +- 11_exp +- 8_Vus +- 19_th) MeV = (120^+21_-26) MeV, is stable over the scale from Mtau down to about 1.4 GeV. Evolving this result to customary scales yields m_s(1 GeV^2) = (160^+28_-35) MeV and m_s(4 GeV^2) = (116^+20_-25) MeV.
Chen Shouxin
Davier Michel
Gamiz Elvira
Hocker Andy
Pich Antonio
No associations
LandOfFree
Strange Quark Mass from the Invariant Mass Distribution of Cabibbo-Suppressed Tau Decays does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Strange Quark Mass from the Invariant Mass Distribution of Cabibbo-Suppressed Tau Decays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strange Quark Mass from the Invariant Mass Distribution of Cabibbo-Suppressed Tau Decays will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-98222