Renormalization group improved ms and ¦Vus¦determination from hadronic t decays

被引：3

作者：

Ananthanarayan, B. ^{[1
]}

Das, Diganta ^{[2
]}

Khan, M. S. A. Alam ^{[1
]}

机构：

[1] Indian Inst Sci, Ctr High Energy Phys, Bangalore 560012, Karnataka, India

[2] Int Inst Informat Technol, Ctr Computat Nat Sci & Bioinformat, Hyderabad 500032, India

来源：

PHYSICAL REVIEW D | 2022年 / 106卷 / 11期

关键词：

QCD SUM-RULES; ELECTROWEAK RADIATIVE-CORRECTIONS; QUARK SCALAR CURRENTS; SPECTRAL FUNCTIONS; BETA-FUNCTION; TAU-DECAYS; VACUUM POLARIZATION; ANOMALOUS DIMENSION; E+E-ANNIHILATION; GAUGE-THEORIES;

D O I：

10.1103/PhysRevD.106.114036

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We determine the strange quark mass (m(s)) and quark mixing element broken vertical bar V-us broken vertical bar, and their joint determination from the Cabibbo suppressed hadronic tau decays in various perturbative schemes. We improve this analysis compared to the previous analysis based on the optimal renormalization or the renormalization group summed perturbation theory (RGSPT) scheme by replacing the theoretical longitudinal contributions with phenomenological parametrization; the RGSPT coefficients are used for the dimension-4 Adler functions. The improved analysis results in the extraction of m(s) (2 GeV) = 98 +/- 19MeV and vertical bar V-us broken vertical bar = 0.2191 +/- 0.0043 from the RGSPT scheme.

引用

页数：25

共 50 条

[1] |Vus| and ms from hadronic tau decays
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[9] DETERMINATION OF THE STRONG COUPLING FROM HADRONIC TAU DECAYS USING RENORMALIZATION GROUP SUMMED PERTURBATION THEORY
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[10] ms from hadronic τ decays
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