Measurement of the ZZ production cross section and Z → ℓ+ℓ−ℓ′+ℓ′− branching fraction in pp collisions at...
Author(s): Khachatryan, V; Sirunyan, AM; Tumasyan, A; Adam, W; Asilar, E; et al
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http://arks.princeton.edu/ark:/88435/pr1s60x| Abstract: | © 2016 The AuthorFour-lepton production in proton–proton collisions, pp→(Z/γ⁎)(Z/γ⁎)→ℓ+ℓ−ℓ′+ℓ′−, where ℓ,ℓ′=e or μ, is studied at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. The data sample corresponds to an integrated luminosity of 2.6 fb−1. The ZZ production cross section, σ(pp→ZZ)=14.6−1.8+1.9(stat)−0.3+0.5(syst)±0.2(theo)±0.4(lumi)pb, is measured for events with two opposite-sign, same-flavor lepton pairs produced in the mass region 60<mℓ+ℓ−,mℓ′+ℓ′−<120 GeV. The Z boson branching fraction to four leptons is measured to be B(Z→ℓ+ℓ−ℓ′+ℓ′−)=4.9−0.7+0.8 (stat)−0.2+0.3 (syst)−0.1+0.2(theo)±0.1(lumi)×10−6 for the four-lepton invariant mass in the range 80<mℓ+ℓ−ℓ′+ℓ′−<100 GeV and dilepton mass mℓ+ℓ−<4 GeV for all opposite-sign, same-flavor lepton pairs. The results are in agreement with standard model predictions. |
| Publication Date: | 10-Dec-2016 |
| Electronic Publication Date: | 27-Oct-2016 |
| Citation: | Khachatryan, V, Sirunyan, AM, Tumasyan, A, Adam, W, Asilar, E, Bergauer, T, Brandstetter, J, Brondolin, E, Dragicevic, M, Erö, J, Flechl, M, Friedl, M, Frühwirth, R, Ghete, VM, Hartl, C, Hörmann, N, Hrubec, J, Jeitler, M, König, A, Krätschmer, I, Liko, D, Matsushita, T, Mikulec, I, Rabady, D, Rad, N, Rahbaran, B, Rohringer, H, Schieck, J, Strauss, J, Treberer-Treberspurg, W, Waltenberger, W, Wulz, CE, Mossolov, V, Shumeiko, N, Suarez Gonzalez, J, Alderweireldt, S, De Wolf, EA, Janssen, X, Lauwers, J, Van De Klundert, M, Van Haevermaet, H, Van Mechelen, P, Van Remortel, N, Van Spilbeeck, A, Abu Zeid, S, Blekman, F, D'Hondt, J, Daci, N, De Bruyn, I, Deroover, K, Heracleous, N, Lowette, S, Moortgat, S, Moreels, L, Olbrechts, A, Python, Q, Tavernier, S, Van Doninck, W, Van Mulders, P, Van Parijs, I, Brun, H, Caillol, C, Clerbaux, B, De Lentdecker, G, Delannoy, H, Fasanella, G, Favart, L, Goldouzian, R, Grebenyuk, A, Karapostoli, G, Lenzi, T, Léonard, A, Luetic, J, Maerschalk, T, Marinov, A, Randle-conde, A, Seva, T, Vander Velde, C, Vanlaer, P, Yonamine, R, Zenoni, F, Zhang, F, Cimmino, A, Cornelis, T, Dobur, D, Fagot, A, Garcia, G, Gul, M, Poyraz, D, Salva, S, Schöfbeck, R, Tytgat, M, Van Driessche, W, Yazgan, E, Zaganidis, N, Bakhshiansohi, H, Beluffi, C, Bondu, O, Brochet, S, Bruno, G. (2016). Measurement of the ZZ production cross section and Z → ℓ<sup>+</sup>ℓ<sup>−</sup>ℓ<sup>′+</sup>ℓ<sup>′−</sup> branching fraction in pp collisions at s=13 TeV. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 763 (280 - 303. doi:10.1016/j.physletb.2016.10.054 |
| DOI: | doi:10.1016/j.physletb.2016.10.054 |
| ISSN: | 0370-2693 |
| Pages: | 280 - 303 |
| Type of Material: | Journal Article |
| Journal/Proceeding Title: | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
| Version: | Final published version. This is an open access article. |
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