Please use this identifier to cite or link to this item: 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 Computer Engineering Research Papers

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