Abstract
A search for a narrow-width resonance decaying into two Higgs bosons, each decaying into a bottom quark-antiquark pair, is presented. The search is performed using proton-proton collision data corresponding to an integrated luminosity of 35.9 fb−1 at sqrt{s}=13 TeV recorded by the CMS detector at the LHC. No evidence for such a signal is observed. Upper limits are set on the product of the production cross section for the resonance and the branching fraction for the selected decay mode in the resonance mass range from 260 to 1200 GeV.
Highlights
Detector and simulated samplesThe central feature of the CMS apparatus is a superconducting solenoid of 6 m internal diameter, providing a magnetic field of 3.8 T
No evidence for a signal is observed and upper limits at 95% confidence level on the production cross section for spin-0 and spin-2 resonances in the mass range from 260 to 1200 GeV are set. These cross-section limits are translated into an exclusion at 95% confidence level of a bulk KK-graviton in the mass ranges of 320–450 GeV and 480–720 GeV
The corresponding excluded mass ranges for a radion are 260–280 GeV, 300–450 GeV and 480–1120 GeV. This analysis outperforms a similar search by CMS using 17.9 fb−1 collected at 8 TeV [15] and extends the sensitivity to the gluon fusion production of a radion with decay constant Λ = 3 TeV and to bulk graviton with κ set to 0.5MPl
Summary
The central feature of the CMS apparatus is a superconducting solenoid of 6 m internal diameter, providing a magnetic field of 3.8 T. Simulated samples of signal events are produced using various Monte Carlo (MC) event generators, with the CMS detector response modeled using the Geant4 [24] program. To model the production of a generic narrow-width spin-0 resonance, we use an MC simulation of the bulk radion produced through gluon fusion. We evaluate the signal efficiencies for a narrow-width spin-2 resonance from a separate simulation of the first excitation of a bulk KK graviton produced through gluon fusion and forced to decay to a pair of Higgs bosons with the parameters reported in ref. Bulk graviton and radion signal events are simulated with masses in the range 260–1200 GeV and widths of 1 MeV (narrow-width approximation), using the MadGraph amc@nlo 2.3.3 [26] event generator at leading order (LO). Simulated events are weighted to match the number of pp interactions per event in data
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.
