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http://bura.brunel.ac.uk/handle/2438/17378
Title: | Measurement of associated Z + charm production in proton–proton collisions at √s=8TeV |
Authors: | Sirunyan, AM Tumasyan, A Adam, W Ambrogi, F Asilar, E Bergauer, T Brandstetter, J Brondolin, E Dragicevic, M Erö, J Flechl, M Friedl, M Frühwirth, R Ghete, VM Grossmann, J Hörmann, N Hrubec, J Jeitler, M König, A Krätschmer, I Liko, D Madlener, T Matsushita, T Mikulec, I Pree, E Rabady, D Rad, N Rohringer, H Schieck, J Spanring, M Spitzbart, D Strauss, J Waltenberger, W Wittmann, J Wulz, CE Zarucki, M Chekhovsky, V Mossolov, V Gonzalez, JS Shumeiko, N De Wolf, EA Janssen, X Lauwers, J Van De Klundert, M Van Haevermaet, H Van Mechelen, P Van Remortel, N Van Spilbeeck, A Zeid, SA Blekman, F D Hondt, J De Bruyn, I De Clercq, J Deroover, K Flouris, G Lowette, S Moortgat, S Moreels, L Olbrechts, A Python, Q Skovpen, K Tavernier, S Van Doninck, W Van Mulders, P Van Parijs, I Brun, H Clerbaux, B De Lentdecker, G Delannoy, H Fasanella, G Favart, L Goldouzian, R Grebenyuk, A Karapostoli, G Lenzi, T Luetic, J Maerschalk, T Marinov, A Randle-conde, A Seva, T Velde, CV Vanlaer, P Vannerom, D Yonamine, R Zenoni, F Zhang, F Cimmino, A Cornelis, T Dobur, D Fagot, A Gul, M Khvastunov, I Poyraz, D Salva, S Schöfbeck, R Tytgat, M Van Driessche, W Verbeke, W Zaganidis, N Bakhshiansohi, H |
Keywords: | CMS;Physics;SMP;Vector boson;Heavy flavour;Standard model physics |
Issue Date: | 2018 |
Publisher: | Springer Verlag |
Citation: | European Physical Journal C, 2018, 78 (4) |
Abstract: | © 2018, CERN for the benefit of the CMS collaboration. A study of the associated production of a Z boson and a charm quark jet (Z + c), and a comparison to production with a b quark jet (Z + b), in p p collisions at a centre-of-mass energy of 8TeV are presented. The analysis uses a data sample corresponding to an integrated luminosity of 19.7fb-1, collected with the CMS detector at the CERN LHC. The Z boson candidates are identified through their decays into pairs of electrons or muons. Jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays of charm hadrons. The measurements are performed in the kinematic region with two leptons with pTℓ>20GeV, | ηℓ| < 2.1 , 71<m111GeV, and heavy flavour jets with pTjet>25GeV and | ηjet| < 2.5. The Z + c production cross section is measured to be σ(pp→Z+c+X)B(Z→ℓ+ℓ-)=8.8±0.5(stat)±0.6(syst)pb. The ratio of the Z + c and Z + b production cross sections is measured to be σ(pp→Z+c+X)/σ(pp→Z+b+X)=2.0±0.2(stat)±0.2(syst). The Z + c production cross section and the cross section ratio are also measured as a function of the transverse momentum of the Z boson and of the heavy flavour jet. The measurements are compared with theoretical predictions. |
URI: | http://bura.brunel.ac.uk/handle/2438/17378 |
DOI: | http://dx.doi.org/10.1140/epjc/s10052-018-5752-x |
ISSN: | 1434-6044 http://dx.doi.org/10.1140/epjc/s10052-018-5752-x 1434-6052 |
Appears in Collections: | Dept of Electronic and Electrical Engineering Research Papers |
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