Mass of the b quark from lattice NRQCD and lattice perturbation theory

Lee, A.J., Monahan, C.J., Horgan, R.R., Davies, C.T.H. , Dowdall, R.J. and Koponen, J. (2013) Mass of the b quark from lattice NRQCD and lattice perturbation theory. Physical Review D, 87(7), 074018. (doi: 10.1103/PhysRevD.87.074018)

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Publisher's URL: http://dx.doi.org/10.1103/PhysRevD.87.074018

Abstract

We present a determination of the b-quark mass accurate through O(α2s) in perturbation theory and including partial contributions at O(α3s). Nonperturbative input comes from the calculation of the Υ and Bs energies in lattice QCD, including the effect of u, d and s sea quarks. We use an improved NRQCD action for the b quark. This is combined with the heavy quark energy shift in NRQCD determined using a mixed approach of high-β simulation and automated lattice perturbation theory. Comparison with experiment enables the quark mass to be extracted: in the MS scheme we find mb(mb)=4.166(43)  GeV.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Dowdall, Dr Rachel and Koponen, Dr Jonna and Davies, Professor Christine
Authors: Lee, A.J., Monahan, C.J., Horgan, R.R., Davies, C.T.H., Dowdall, R.J., and Koponen, J.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Physical Review D
Publisher:American Physical Society
ISSN:1550-7998
ISSN (Online):1550-2368

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
481951Investigations in Quantum Chromodynamics and Physics Beyond the Standard ModelChristine DaviesScience & Technologies Facilities Council (STFC)ST/G00059X/1P&A - PHYSICS & ASTRONOMY
462271Precision results for particle physics from lattice QCD: Computing resources and software support for the UKQCD physics programme.Christine DaviesScience & Technologies Facilities Council (STFC)ST/H00887X/1P&A - PHYSICS & ASTRONOMY
573721Phenomenology from Lattice QCD and Collider PhysicsChristine DaviesScience & Technologies Facilities Council (STFC)ST/J000442/1P&A - PHYSICS & ASTRONOMY