Precision determination of heavy quark masses and the strong coupling constant

doi:10.1016/S0370-2693(03)00276-4

	Precision determination of heavy quark masses and the strong coupling constant
	Erler, J ; Luo, MX
刊名	PHYSICS LETTERS B
	2003-04-17
卷号	558 页码:125-131
ISSN号	0370-2693
DOI	10.1016/S0370-2693(03)00276-4
英文摘要	We present a new QCD sum rule with high sensitivity to the continuum regions of charm and bottom quark pair production. Combining this sum rule with existing ones yields very stable results for the (MS) over bar quark masses, (m) over cap (c)((m) over cap (c)) and (m) over cap (b)((m) over cap (b)). We introduce a phenomenological parametrization of the continuum interpolating smoothly between the pseudoscalar threshold and asymptotic quark regions. Comparison of our approach with recent BES data allows for a robust theoretical error estimate. The parametric uncertainty due to alpha(s) is reduced by performing a simultaneous fit to the most precise sum rules and other high precision observables. This includes a new evaluation of the lifetime of the tau lepton, tau(tau), serving as a strong constraint on alpha(s). Our results are (m) over cap (c)((m) over cap (c)) = 1.289(-0.045)(+0.040) GeV, (m) over cap (b)((m) over cap (b)) = 4.207(-0.031)(+0.030) GeV (with a correlation of 29%), and alpha(s)(M-Z)[tau(tau)] = 0.1221(-0.0023)(+0.0026). (C) 2003 Elsevier Science B.V. All rights reserved.
WOS关键词	QCD SUM-RULES ; ELECTROWEAK RADIATIVE-CORRECTIONS ; RENORMALIZATION-GROUP ANALYSIS ; TO-LEADING ORDER ; TAU-LEPTON DECAY ; CURRENT CORRELATORS ; CHARM-QUARK ; O(ALPHA(2)(S)) ; POLARIZATION ; ALPHA(S)
WOS研究方向	Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000182008800001
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/39088]
专题	中国科学院近代物理研究所
通讯作者	Erler, J
作者单位	1.Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA 2.Univ Nacl Autonoma Mexico, Inst Fis, Mexico City 01000, DF, Mexico 3.Zhejiang Univ, Inst Modern Phys, Dept Phys, Hangzhou 310027, Peoples R China
推荐引用方式 GB/T 7714	Erler, J,Luo, MX. Precision determination of heavy quark masses and the strong coupling constant[J]. PHYSICS LETTERS B,2003,558:125-131.
APA	Erler, J,&Luo, MX.(2003).Precision determination of heavy quark masses and the strong coupling constant.PHYSICS LETTERS B,558,125-131.
MLA	Erler, J,et al."Precision determination of heavy quark masses and the strong coupling constant".PHYSICS LETTERS B 558(2003):125-131.