Test of the flavour independence of αs using next-to-leading order calculations for heavy quarks

Kartvelishvili, Vakhtang (1999) Test of the flavour independence of αs using next-to-leading order calculations for heavy quarks. European Physical Journal C: Particles and Fields, 11 (4). pp. 643-659. ISSN 1434-6044

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Abstract

We present a test of the flavour independence of the strong coupling constant for charm and bottom quarks with respect to light (uds) quarks, based on a hadronic event sample obtained with the OPAL detector at LEP. Five observables related to global event shapes were used to measure αs in three flavour tagged samples (uds, c and b). The event shape distributions were fitted by O(α2s) calculations of jet production taking into account mass effects for the c and b quarks. We find: αcs/αuds = 0.997 ± 0.038 (stat.) ± 0.030 (syst.) ± 0.012 (theory) and αbs/αuds = 0.993 ± 0.008 (stat.) ± 0.006 (syst.) ± 0.011 (theory).

Item Type:
Journal Article
Journal or Publication Title:
European Physical Journal C: Particles and Fields
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2200/2201
Subjects:
ID Code:
82828
Deposited By:
Deposited On:
14 Nov 2016 10:50
Refereed?:
Yes
Published?:
Published
Last Modified:
11 Mar 2020 05:41