Collider Cross Talk

Higgs spin results from ATLAS and CMS

by Bruno Lenzi (CERN) , Alessio Bonato (CERN)

Europe/Zurich
4-2-011 - TH common room (CERN)

4-2-011 - TH common room

CERN

40
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Description
Studies are described characterizing the spin and parity of the observed Higgs boson by ATLAS and CMS, including ~5 fb-1 of data collected at sqrt(s)=7 TeV and ~20-21 fb-1 at 8 TeV. Results are presented using the H->ZZ->4l and H->WW->2l2nu final states in both ATLAS and CMS, as well as the H->gamma gamma final state in ATLAS. The ATLAS ZZ results exclude spin-parity hypotheses of 0- and 1+ at greater than 97% CL when compared to the 0+ hypothesis, and the CMS ZZ results exclude the 2+ hypothesis with minimal couplings to vector bosons at greater than 98% CL, and the 0-, 1+, and 1- hypothesis at greater than 99.8% CL with respect to the 0+ hypothesis. The ATLAS WW results exclude the 2+ hypothesis with minimal couplings at 95% CL with respect to 0+. The ATLAS di-photon results exclude the 2+ hypothesis with minimal couplings and pure gluon fusion production at greater than 95% CL. Additional spin-parity hypotheses which have been tested give of an observed separation of less than 2 sigma from the 0+ hypothesis. The spin and parity of the observed Higgs boson are consistent with the Standard Model compared to all of the alternative models which have been tested.
ATLAS-CONF-2013-013
ATLAS-CONF-2013-029
ATLAS-CONF-2013-031
CMS-PAS-HIG-13-002
CMS-PAS-HIG-13-003