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| 題名: | Measurement of the ZZ production cross section and Z → ℓ+ℓ−ℓ′+ℓ′− branching fraction in pp collisions at s=13 TeV |
| 作者: | 林宗泰;Sirunyan, A.M.;Hartl, C.;Jeitler, M.;Mossolov, V.;Chinellato, J.;Aleksandrov, A.;Liu, Z.;Qian, S.J.;Florez, C.;Rykaczewski, H.;Carrera Jarrin, E.;Kadastik, M.;Luukka, P.;Tuuva, T.;Gras, P.;Chapon, E.;Buttignol, M.;Chabert, E.C.;Fontaine, J.-C.;Courbon, B.;Heister, A.;Schulte, J.F.;Sonnenschein, L.;Stahl, A.;Beernaert, K.;Karacheban, O.;Spannagel, S.;Dreyer, T.;Roscher, F.;Trocsanyi, Z.L.;Kaur, M.;Mittal, M.;Dewanjee, R.K.;Safarzadeh, B.;Rossi, A.M.;Lacaprara, S.;Zumerle, G.;Androsov, K.;Organtini, G.;Jo, Y.;De La Cruz-Burelo, E.;Butler, P.H.;Hassan, Q.;Matveev, V.;Moisenz, P.;Skatchkov, N.;Golovtsov, V.;Rusakov, S.V.;Ryutin, R.;Calvo, E.;Missiroli, M.;González Fernández, J.R.;Lopez Virto, A.;D'Alfonso, M.;Funk, W.;Mersi, S.;Pape, L.;Takahashi, Y.;Kaestli, H.C.;Meister, D.;Canelli, M.F.;Singh, G.;Dozen, C.;Girgis, S.;Petyt, D.;Lane, R.;Raymond, D.M.;Cooper, S.I.;Heintz, U.;Conway, R.;Yates, B.R.;Newman, H.B.;Zhu, R.Y.;Vorobiev, I.;Johnson, A.;Zientek, M.;Apollinari, G.;Burkett, K.;Cihangir, S.;Liu, T.;Nahn, S.;Diamond, B.;Gerber, C.E.;Clarida, W.;Yi, K.;Makouski, M.;Saini, L.K.;Ferraioli, C.;Kolberg, T.;Iiyama, Y.;Levin, A.;Avdeeva, E.;Harrington, C.;Parker, A.;Ji, W.;Contreras-Campana, E.;Gershtein, Y.;Gómez Espinosa, T.A.;Sun, X.;Dasu, S. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | CMS;Electroweak;Physics |
| 日期: | 2016-12-10 |
| 上傳時間: | 2026-04-23 12:23:04 (UTC+8) |
| 出版者: | United States: Elsevier B.V |
| 摘要: | 摘要： Four-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.
出版者： United States: Elsevier B.V
出版日期： 2016-12-01
出處： Physics letters. B, 2016-12, Vol.763 (C), p.280-303
資源來源： Elsevier ScienceDirect Journals: Bodleian Libraries collection
版權： 2016 The Author
識別號： ISSN: 0370-2693
識別號： EISSN: 1873-2445
識別號： DOI: 10.1016/j.physletb.2016.10.054 |
| 顯示於類別: | [物理學系] 期刊論文
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