Abstract
The study of the spin-parity and tensor structure of the interactions of the recently discovered Higgs boson is performed using the H to ZZ, Z gamma*, gamma* gamma* to 4 l, H to WW to l nu l nu, and H to gamma gamma decay modes. The full dataset recorded by the CMS experiment during the LHC Run 1 is used, corresponding to an integrated luminosity of up to 5.1 inverse femtobarns at a center-of-mass energy of 7 TeV and up to 19.7 inverse femtobarns at 8 TeV. A wide range of spin-two models is excluded at a 99% confidence level or higher, or at a 99.87% confidence level for the minimal gravity-like couplings, regardless of whether assumptions are made on the production mechanism. Any mixed-parity spin-one state is excluded in the ZZ and WW modes at a greater than 99.999% confidence level. Under the hypothesis that the resonance is a spin-zero boson, the tensor structure of the interactions of the Higgs boson with two vector bosons ZZ, Z gamma, gamma gamma, and WW is investigated and limits on eleven anomalous contributions are set. Tighter constraints on anomalous HVV interactions are obtained by combining the HZZ and HWW measurements. All observations are consistent with the expectations for the standard model Higgs boson with the quantum numbers J[PC]=0[++].
Highlights
The observation of a new boson [1,2,3] with a mass around 125 GeV and properties consistent with the standard model (SM) Higgs boson [4,5,6,7,8,9,10] was reported by the ATLAS and CMS Collaborations in 2012
The discovery was followed by a comprehensive set of measurements [11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27] of its properties to determine if the new boson follows the SM predictions or if there are indications for physics beyond the SM (BSM)
The results showed that the spin-parity properties of the new boson are consistent with the expectations for the scalar SM Higgs boson
Summary
The observation of a new boson [1,2,3] with a mass around 125 GeV and properties consistent with the standard model (SM) Higgs boson [4,5,6,7,8,9,10] was reported by the ATLAS and CMS Collaborations in 2012. An extended study of the spin-parity properties of the Higgs boson and of the tensor structure of its interactions with electroweak gauge bosons is presented using the H → ZZ, ZγÃ, γÃγà → 4l, where the interference between the three intermediate states is included, and H → WW → lνlν decay modes at the CMS experiment. The analysis is based on theoretical and phenomenological studies that describe the couplings of a Higgs-like boson to two gauge bosons They provide techniques and ideas for measuring the spin and CP properties of a particle interacting with vector bosons [28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
