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Measurement of differential cross sections for Z bosons produced in association with charm jets in pp collisions at √s = 13 TeV

  • Author(s): Sirunyan, AM;
  • Tumasyan, A;
  • Adam, W;
  • Bergauer, T;
  • Dragicevic, M;
  • Erö, J;
  • Escalante Del Valle, A;
  • Frühwirth, R;
  • Jeitler, M;
  • Krammer, N;
  • Lechner, L;
  • Liko, D;
  • Madlener, T;
  • Mikulec, I;
  • Pitters, FM;
  • Rad, N;
  • Schieck, J;
  • Schöfbeck, R;
  • Spanring, M;
  • Templ, S;
  • Waltenberger, W;
  • Wulz, CE;
  • Zarucki, M;
  • Chekhovsky, V;
  • Litomin, A;
  • Makarenko, V;
  • Suarez Gonzalez, J;
  • Darwish, MR;
  • De Wolf, EA;
  • Di Croce, D;
  • Janssen, X;
  • Kello, T;
  • Lelek, A;
  • Pieters, M;
  • Rejeb Sfar, H;
  • Van Haevermaet, H;
  • Van Mechelen, P;
  • Van Putte, S;
  • Van Remortel, N;
  • Blekman, F;
  • Bols, ES;
  • Chhibra, SS;
  • D’Hondt, J;
  • De Clercq, J;
  • Lontkovskyi, D;
  • Lowette, S;
  • Marchesini, I;
  • Moortgat, S;
  • Morton, A;
  • Python, Q;
  • Tavernier, S;
  • Van Doninck, W;
  • Van Mulders, P;
  • Beghin, D;
  • Bilin, B;
  • Clerbaux, B;
  • De Lentdecker, G;
  • Dorney, B;
  • Favart, L;
  • Grebenyuk, A;
  • Kalsi, AK;
  • Makarenko, I;
  • Moureaux, L;
  • Pétré, L;
  • Popov, A;
  • Postiau, N;
  • Starling, E;
  • Thomas, L;
  • Vander Velde, C;
  • Vanlaer, P;
  • Vannerom, D;
  • Wezenbeek, L;
  • Cornelis, T;
  • Dobur, D;
  • Gruchala, M;
  • Khvastunov, I;
  • Niedziela, M;
  • Roskas, C;
  • Skovpen, K;
  • Tytgat, M;
  • Verbeke, W;
  • Vermassen, B;
  • Vit, M;
  • Bruno, G;
  • Bury, F;
  • Caputo, C;
  • David, P;
  • Delaere, C;
  • Delcourt, M;
  • Donertas, IS;
  • Giammanco, A;
  • Lemaitre, V;
  • Mondal, K;
  • Prisciandaro, J;
  • Taliercio, A;
  • Teklishyn, M;
  • Vischia, P;
  • Wertz, S;
  • Wuyckens, S;
  • Alves, GA
  • et al.
Abstract

Measurements are presented of differential cross sections for the production of Z bosons in association with at least one jet initiated by a charm quark in pp collisions at s = 13 TeV. The data recorded by the CMS experiment at the LHC correspond to an integrated luminosity of 35.9 fb−1. The final states contain a pair of electrons or muons that are the decay products of a Z boson, and a jet consistent with being initiated by a charm quark produced in the hard interaction. Differential cross sections as a function of the transverse momentum pT of the Z boson and pT of the charm jet are compared with predictions from Monte Carlo event generators. The inclusive production cross section 405.4 ± 5.6 (stat) ± 24.3 (exp) ± 3.7 (theo) pb, is measured in a fiducial region requiring both leptons to have pseudorapidity |η| < 2.4 and pT> 10 GeV, at least one lepton with pT> 26 GeV, and a mass of the pair in the range 71–111 GeV, while the charm jet is required to have pT> 30 GeV and |η| < 2.4. These are the first measurements of these cross sections in proton-proton collisions at 13 TeV. [Figure not available: see fulltext.]

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