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Search for ZZ resonances in the 2?2? final state in proton-proton collisions at 13 TeV

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.

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 Autoría: Sirunyan A., 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., 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

 Fuente: Journal of High Energy Physics, Vol. 2018, Num. 03, Art. Num. 003

Editorial: Springer Verlag

 Fecha de publicación: 05/03/2018

Nº de páginas: 39

Tipo de publicación: Artículo de Revista

 DOI: 10.1007/JHEP03(2018)003

ISSN: 1126-6708,1029-8479

Url de la publicación: https://doi.org/10.1007/JHEP03(2018)003