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Search for ZZ resonances in the 2ℓ2ν final state in proton-proton collisions at 13 TeV
Date Issued
01-03-2018
Author(s)
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Asilar, E.
Bergauer, T.
Brandstetter, J.
Brondolin, E.
Dragicevic, M.
Erö, J.
Escalante Del Valle, A.
Flechl, M.
Friedl, M.
Frühwirth, R.
Ghete, V. M.
Grossmann, J.
Hrubec, J.
Jeitler, M.
König, A.
Krammer, N.
Krätschmer, I.
Liko, D.
Madlener, T.
Mikulec, I.
Pree, E.
Rad, N.
Rohringer, H.
Schieck, J.
Schöfbeck, R.
Spanring, M.
Spitzbart, D.
Taurok, A.
Waltenberger, W.
Wittmann, J.
Wulz, C. E.
Zarucki, M.
Chekhovsky, V.
Mossolov, V.
Suarez Gonzalez, J.
De Wolf, E. A.
Di Croce, D.
Janssen, X.
Lauwers, J.
Van De Klundert, M.
Van Haevermaet, H.
Van Mechelen, P.
Van Remortel, N.
Abu Zeid, S.
Blekman, F.
D’Hondt, J.
De Bruyn, I.
De Clercq, J.
Deroover, K.
Flouris, G.
Lontkovskyi, D.
Lowette, S.
Marchesini, I.
Moortgat, S.
Moreels, L.
Python, Q.
Skovpen, K.
Tavernier, S.
Van Doninck, W.
Van Mulders, P.
Van Parijs, I.
Beghin, D.
Bilin, B.
Brun, H.
Clerbaux, B.
De Lentdecker, G.
Delannoy, H.
Dorney, B.
Fasanella, G.
Favart, L.
Goldouzian, R.
Grebenyuk, A.
Kalsi, A. K.
Lenzi, T.
Luetic, J.
Maerschalk, T.
Marinov, A.
Seva, T.
Starling, E.
Vander Velde, C.
Vanlaer, P.
Vannerom, D.
Yonamine, R.
Zenoni, F.
Cornelis, T.
Dobur, D.
Fagot, A.
Gul, M.
Khvastunov, I.
Poyraz, D.
Roskas, C.
Salva, S.
Tytgat, M.
Verbeke, W.
Zaganidis, N.
Bakhshiansohi, H.
Abstract
A search for heavy resonances decaying to a pair of Z bosons is performed using data collected with the CMS detector at the LHC. Events are selected by requiring two oppositely charged leptons (electrons or muons), consistent with the decay of a Z boson, and large missing transverse momentum, which is interpreted as arising from the decay of a second Z boson to two neutrinos. The analysis uses data from proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb−1. The hypothesis of a spin-2 bulk graviton (X) decaying to a pair of Z bosons is examined for 600 ≤ mX ≤ 2500 GeV and upper limits at 95% confidence level are set on the product of the production cross section and branching fraction of X → ZZ ranging from 100 to 4 fb. For bulk graviton models characterized by a curvature scale parameter k˜ = 0.5 in the extra dimension, the region mXOpenSPiltSPi 800 GeV is excluded, providing the most stringent limit reported to date. Variations of the model considering the possibility of a wide resonance produced exclusively via gluon-gluon fusion or q q ¯ annihilation are also examined.[Figure not available: see fulltext.].
Volume
2018