Abstract
A search for a very light Higgs boson decaying into a pair of tau leptons is presented within the framework of the next-to-minimal supersymmetric standard model. This search is based on a data set corresponding to an integrated luminosity of 19.7 inverse femtobarns of proton-proton collisions collected by the CMS experiment at a centre-of-mass energy of 8 TeV. The signal is defined by the production of either of the two lightest scalars, h[1] or h[2], via gluon-gluon fusion and subsequent decay into a pair of the lightest Higgs bosons, a[1] or h[1]. The h[1] or h[2] boson is identified with the observed state at a mass of 125 GeV. The analysis searches for decays of the a[1] (h[1]) states into pairs of tau leptons and covers a mass range for the a[1] (h[1]) boson of 4 to 8 GeV. The search reveals no significant excess in data above standard model background expectations, and an upper limit is set on the signal production cross section times branching fraction as a function of the a[1] (h[1]) boson mass. The 95% confidence level limit ranges from 4.5 pb at m(a[1]) (m(h[1])) = 8 GeV to 10.3 pb at m(a[1]) (m(h[1])) = 5 GeV.
Highlights
quantum chromodynamics (QCD) multijet tt Electroweak DataSignal acceptance A(gg → H(125) → φ1φ1 → 4τ ) 820 ± 320 1.2 ± 0.2 5.0 ± 4.7A simulation study shows that the sample of same-sign dimuon events selected as described in section 4, but without requiring a presence of one-prong τ candidates and without applying the isolation requirement for the muon-track systems, is dominated by QCD multiparton production, where 94% of all selected events contain b quarks in the final state
This search is based on a data set corresponding to an integrated luminosity of 19.7 fb−1 of proton-proton collisions collected by the CMS experiment at a centre-of-mass energy of 8 TeV
The analysis presented in this paper is motivated by the NMSSM scenarios that predict a very light h1 or a1 state with mass in the range 2mτ < mh1 < 2mb, where mτ is the mass of the τ lepton and mb is the mass of the b quark
Summary
This paper describes a search for the production of the H(125) boson, with its decay into a pair of light NMSSM Higgs bosons φ1. The search is performed for very light φ1 states, covering a mass range of 4 to 8 GeV Within this mass range the φ1 boson is expected to decay predominantly into a pair of τ leptons, φ1 → τ τ. The H(125) state can be produced with relatively high transverse momentum if a hard gluon is radiated from the initial-state gluons or the heavy-quark loop In this case, the separation between two φ1 bosons in azimuthal angle is reduced, while the separation in pseudorapidity η can still be large. With the exception of a few special QCD multijet samples discussed, are processed through a detailed simulation of the CMS detector, based on. Geant4 [61], and are reconstructed employing the same algorithms as for data
Sign-in/Register to view highlights & summary 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.
