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Study of the Mass and Spin-Parity of the Higgs Boson Candidate via Its Decays to Z Boson Pairs

S. Chatrchyan et al. (CMS Collaboration)
Phys. Rev. Lett. 110, 081803 – Published 21 February 2013; Erratum Phys. Rev. Lett. 110, 189901 (2013)
Physics logo See Synopsis: Higgs-like Particle in a Mirror

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 17.3fb1, 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 μ 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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  • Received 29 December 2012

DOI:https://doi.org/10.1103/PhysRevLett.110.081803

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2013 CERN, for the CMS Collaboration

Erratum

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Higgs-like Particle in a Mirror

Published 21 February 2013

The particle thought to be the Higgs boson seems likely to pass an important identity check.

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Vol. 110, Iss. 8 — 22 February 2013

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