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 17.3fb-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 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.
- Publication:
-
Physical Review Letters
- Pub Date:
- February 2013
- DOI:
- 10.1103/PhysRevLett.110.081803
- arXiv:
- arXiv:1212.6639
- Bibcode:
- 2013PhRvL.110h1803C
- Keywords:
-
- 14.80.Bn;
- 12.60.-i;
- 13.85.Qk;
- 13.88.+e;
- Standard-model Higgs bosons;
- Models beyond the standard model;
- Inclusive production with identified leptons photons or other nonhadronic particles;
- Polarization in interactions and scattering;
- High Energy Physics - Experiment
- E-Print:
- Submitted to Phys. Rev. Lett. Final version