Search for Higgs Boson and Observation of Z Boson through Their Decay into a Charm Quark-Antiquark Pair in Boosted Topologies in Proton-Proton Collisions at √s = 13 TeV
Abstract
A search for the standard model (SM) Higgs boson (H) produced with transverse momentum (p_T) greater than 450 GeV and decaying to a charm quark-antiquark (cc¯) pair is presented. The search is performed using proton-proton collision data collected at √s = 13 TeV by the CMS experiment at the LHC, corresponding to an integrated luminosity of 138 fb⁻¹. Boosted H → cc¯ decay products are reconstructed as a single large-radius jet and identified using a deep neural network charm tagging technique. The method is validated by measuring the Z → cc¯ decay process, which is observed in association with jets at high p_T for the first time with a signal strength of 1.00₋₀.₁₄⁺⁰.¹⁷(syst) ± 0.08(theo) ± 0.06(stat), defined as the ratio of the observed process rate to the SM expectation. The observed (expected) upper limit on σ(H)B(H → cc¯) is set at 47 (39) times the SM prediction at 95% confidence level. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000637812Publication status
publishedExternal links
Journal / series
Physical Review LettersVolume
Pages / Article No.
Publisher
American Physical SocietySubject
Charm quark; Higgs bosons; W & Z bosons; Hadron collidersOrganisational unit
03904 - Wallny, Rainer / Wallny, Rainer
03593 - Dissertori, Günther / Dissertori, Günther
09720 - de Cosa, Annapaola / de Cosa, Annapaola
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