Study of the Mass and Spin-Parity of the Higgs Boson Candidate via Its Decays to Z Boson Pairs
- Chatrchyan, S.
- Khachatryan, V.
- Sirunyan, A. M.
- Tumasyan, A.
- Adam, W.
- Aguilo, E.
- Bergauer, T.
- Dragicevic, M.
- Eroe, J.
- Fabjan, C.
- Friedl, M.
- Fruehwirth, R.
- Ghete, V. M.
- Hoermann, N.
- Hrubec, J.
- Jeitler, M.
- Kiesenhofer, W.
- Knuenz, V.
- Krammer, M.
- Kraetschmer, I.
- Liko, D.
- Mikulec, I.
- Pernicka, M.
- Rabady, D.
- Rahbaran, B.
- Rohringer, C.
- Rohringer, H.
- Schoefbeck, R.
- Strauss, J.
- Taurok, A.
- Waltenberger, W.
- Wulz, C.E.
- Mossolov, V.
- Shumeiko, N.
- Gonzalez, J. Suarez
- Alderweireldt, S.
- Bansal, M.
- Bansal, S.
- Cornelis, T.
- De
DOIAbstract
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 fb(-1), 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. DOI: 10.1103/PhysRevLett.110.081803Physics, MultidisciplinarySCI(E)EI50ARTICLE8null11
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