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Abstract
Decays of the 125 GeV Higgs boson into a Z boson and a ρ
0
(770) or φ(1020)
meson are searched for using proton-proton collision data collected by the CMS experiment
at the LHC at √
s = 13 TeV. The analysed data set corresponds to an integrated luminosity
of 137 fb−1
. Events are selected in which the Z boson decays into a pair of electrons or a
pair of muons, and the ρ and φ mesons decay into pairs of pions and kaons, respectively.
No significant excess above the background model is observed. As different polarization
states are possible for the decay products of the Z boson and ρ or φ mesons, affecting the
signal acceptance, scenarios in which the decays are longitudinally or transversely polarized
are considered. Upper limits at the 95% confidence level on the Higgs boson branching
fractions into Zρ and Zφ are determined to be 1.04–1.31% and 0.31–0.40%, respectively,
where the ranges reflect the considered polarization scenarios; these values are 740–940
and 730–950 times larger than the respective standard model expectations. These results
constitute the first experimental limits on the two decay channels.
0
(770) or φ(1020)
meson are searched for using proton-proton collision data collected by the CMS experiment
at the LHC at √
s = 13 TeV. The analysed data set corresponds to an integrated luminosity
of 137 fb−1
. Events are selected in which the Z boson decays into a pair of electrons or a
pair of muons, and the ρ and φ mesons decay into pairs of pions and kaons, respectively.
No significant excess above the background model is observed. As different polarization
states are possible for the decay products of the Z boson and ρ or φ mesons, affecting the
signal acceptance, scenarios in which the decays are longitudinally or transversely polarized
are considered. Upper limits at the 95% confidence level on the Higgs boson branching
fractions into Zρ and Zφ are determined to be 1.04–1.31% and 0.31–0.40%, respectively,
where the ranges reflect the considered polarization scenarios; these values are 740–940
and 730–950 times larger than the respective standard model expectations. These results
constitute the first experimental limits on the two decay channels.
| Datum van beschikbaarheid | 15 sep 2020 |
|---|---|
| Uitgever | HEPData |
Format
- Format
-
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iBOF/23/074: Ontsluiten van de charm-Higgs koppeling bij de LHC
D'Hondt, J., Lowette, S., Van Mechelen, P. & Dobur, D.
1/01/23 → 31/12/26
Project: Fundamenteel
-
Onderzoekersoutput
- 1 Article
-
Search for decays of the 125 GeV Higgs boson into a Z boson and a $ρ$ or $φ$ meson
Collaboration, CMS., Blekman, F., Bols, E. S., Chhibra, S. S., D'Hondt, J., De Clercq, J., Lontkovskyi, D., Lowette, S., Marchesini, I., Moortgat, S., Morton, A., Python, Q., Tavernier, S., Van Doninck, W., Van Mulders, P., Burns, D. J. P., Burns, D. & Burns, D. J. P., 10 nov 2020, In: JHEP. 2020, 11, 42 blz., 39.Onderzoeksoutput: Article › peer review
Open AccessBestand6 Citaten (Scopus)55 Downloads (Pure)