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Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs

Abstract : A study is presented of the mass and spin-parity of the new boson recently observed at the LHC at a mass near 125 GeV. An integrated luminosity of 17.3 inverse femtobarns, collected by the CMS experiment in proton-proton collisions at center-of-mass energies of 7 and 8 TeV, is used. The measured mass in the ZZ channel, where both Z bosons decay to e or mu pairs, is 126.2 +/- 0.6 (stat.) +/- 0.2 (syst.) GeV. The angular distributions of the lepton pairs in this channel are sensitive to the spin-parity of the boson. Under the assumption of spin 0, the present data are consistent with the pure scalar hypothesis, while disfavoring the pure pseudoscalar hypothesis.
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http://hal.in2p3.fr/in2p3-00794202
Contributor : Sylvie Flores <>
Submitted on : Monday, February 25, 2013 - 12:08:26 PM
Last modification on : Wednesday, November 25, 2020 - 4:10:43 PM

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S. Chatrchyan, M. Besançon, S. Choudhury, F. Couderc, M. Dejardin, et al.. Study of the mass and spin-parity of the Higgs boson candidate via its decays to Z boson pairs. Physical Review Letters, American Physical Society, 2012, 110, pp.081803. ⟨10.1103/PhysRevLett.110.081803⟩. ⟨in2p3-00794202⟩

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