Determination of the b-quark mass mb from the angular screening effects in the ATLAS b-jet shape data

The dependence of jet shapes in tt¯ events on the b-quark mass and the strong coupling is investigated. To this end, the Pythia Monte Carlo generator is used to produce samples of tt¯ events in pp collisions at s=7TeV, performing a scan over the values for the shower QCD scale Λs and the b-quark mas...

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Bibliographic Details
Published inNuclear physics. B Vol. 889; no. C; pp. 401 - 418
Main Authors Llorente, Javier, Cantero, Josu
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.12.2014
Elsevier
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Summary:The dependence of jet shapes in tt¯ events on the b-quark mass and the strong coupling is investigated. To this end, the Pythia Monte Carlo generator is used to produce samples of tt¯ events in pp collisions at s=7TeV, performing a scan over the values for the shower QCD scale Λs and the b-quark mass mb. The obtained jet shapes are compared with recently published data from the ATLAS Collaboration. From fits to the light-jet data, the Monte Carlo shower scale is determined, while the b-quark mass is extracted using the b-jet shapes. The result for the mass of the b-quark is mb=4.86−0.42+0.49GeV.
ISSN:0550-3213
1873-1562
DOI:10.1016/j.nuclphysb.2014.10.021