Bibcode
Sirunyan, A. M.; Tumasyan, A.; Adam, W.; Ambrogi, F.; Asilar, E.; Bergauer, T.; Brandstetter, J.; Brondolin, E.; Dragicevic, M.; Erö, J.; Escalante Del Valle, A.; Flechl, M.; Friedl, M.; Frühwirth, R.; Ghete, V. M.; Grossmann, J.; Hrubec, J.; Jeitler, M.; König, A.; Krammer, N.; Krätschmer, I.; Liko, D.; Madlener, T.; Mikulec, I.; Pree, E.; Rad, N.; Rohringer, H.; Schieck, J.; Schöfbeck, R.; Spanring, M.; Spitzbart, D.; Waltenberger, W.; Wittmann, J.; Wulz, C.-E.; Zarucki, M.; Chekhovsky, V.; Mossolov, V.; Suarez Gonzalez, J.; De Wolf, E. A.; Di Croce, D.; Janssen, X.; Lauwers, J.; Van De Klundert, M.; Van Haevermaet, H.; Van Mechelen, P.; Van Remortel, N.; Abu Zeid, S.; Blekman, F.; D'Hondt, J.; De Bruyn, I.; De Clercq, J.; Deroover, K.; Flouris, G.; Lontkovskyi, D.; Lowette, S.; Marchesini, I.; Moortgat, S.; Moreels, L.; Python, Q.; Skovpen, K.; Tavernier, S.; Van Doninck, W.; Van Mulders, P.; Van Parijs, I.; Beghin, D.; Bilin, B.; Brun, H.; Clerbaux, B.; De Lentdecker, G.; Delannoy, H.; Dorney, B.; Fasanella, G.; Favart, L.; Goldouzian, R.; Grebenyuk, A.; Lenzi, T.; Luetic, J.; Maerschalk, T.; Marinov, A.; Seva, T.; Starling, E.; Vander Velde, C.; Vanlaer, P.; Vannerom, D.; Yonamine, R.; Zenoni, F.; Zhang, F.; Cimmino, A.; Cornelis, T.; Dobur, D.; Fagot, A.; Gul, M.; Khvastunov, I.; Poyraz, D.; Roskas, C.; Salva, S.; Tytgat, M.; Verbeke, W.; Zaganidis, N.; Bakhshiansohi, H. et al.
Referencia bibliográfica
Journal of Instrumentation, Volume 13, Issue 05, pp. P05011 (2018).
Fecha de publicación:
5
2018
Número de citas
746
Número de citas referidas
479
Descripción
Many measurements and searches for physics beyond the standard model at
the LHC rely on the efficient identification of heavy-flavour jets, i.e.
jets originating from bottom or charm quarks. In this paper, the
discriminating variables and the algorithms used for heavy-flavour jet
identification during the first years of operation of the CMS experiment
in proton-proton collisions at a centre-of-mass energy of 13 TeV, are
presented. Heavy-flavour jet identification algorithms have been
improved compared to those used previously at centre-of-mass energies of
7 and 8 TeV. For jets with transverse momenta in the range expected in
simulated bar t events, these new developments result in an efficiency
of 68% for the correct identification of a b jet for a probability of 1%
of misidentifying a light-flavour jet. The improvement in relative
efficiency at this misidentification probability is about 15%, compared
to previous CMS algorithms. In addition, for the first time algorithms
have been developed to identify jets containing two b hadrons in
Lorentz-boosted event topologies, as well as to tag c jets. The large
data sample recorded in 2016 at a centre-of-mass energy of 13 TeV has
also allowed the development of new methods to measure the efficiency
and misidentification probability of heavy-flavour jet identification
algorithms. The b jet identification efficiency is measured with a
precision of a few per cent at moderate jet transverse momenta (between
30 and 300 GeV) and about 5% at the highest jet transverse momenta
(between 500 and 1000 GeV).