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Abstract: The first measurement of the jet mass mjet of top quark jets produced in t t ¯ events from pp collisions at s=8TeV is reported for the jet with the largest transverse momentum pT in highly boosted hadronic top quark decays. The data sample, collected with the CMS detector, corresponds to an integrated luminosity of 19.7fb-1. The measurement is performed in the lepton+jets channel in which the products of the semileptonic decay t ? b W with W ? ?? where ? is an electron or muon, are used to select t t ¯ events with large Lorentz boosts. The products of the fully hadronic decay t ? b W with W ? q q ¯ ? are reconstructed using a single Cambridge?Aachen jet with distance parameter R= 1.2 , and pT> 400 GeV. The t t ¯ cross section as a function of mjet is unfolded at the particle level and is used to test the modelling of highly boosted top quark production. The peak position of the mjet distribution is sensitive to the top quark mass mt, and the data are used to extract a value of mt to assess this sensitivity.
Fuente: European Physical Journal C, Vol. 77, Iss. 07, Art. Num. 467 (2017)
Publisher: Springer New York LLC
Publication date: 01/07/2017
No. of pages: 28
Publication type: Article
DOI: 10.1140/epjc/s10052-017-5030-3
ISSN: 1434-6044,1434-6052
Publication Url: https://doi.org/10.1140/epjc/s10052-017-5030-3
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
ESTEBAN CURRAS RIVERA
MARCOS FERNANDEZ GARCIA
JUAN GARCIA FERRERO
GERVASIO GOMEZ GRAMUGLIO
MARIA AMPARO LOPEZ VIRTO
JESUS MARCO DE LUCAS
CELSO MARTINEZ RIVERO
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LUCA SCODELLARO
NICOLO TREVISANI
IVAN VILA ALVAREZ
ROCIO VILAR CORTABITARTE
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