This paper describes the search for a high-mass narrow-width scalar particle decaying into a Z boson and a photon. The analysis is performed using proton-proton collision data recorded with the CMS detector at the LHC at center-of-mass energies of 8 and 13TeV, corresponding to integrated luminosities of 19.7 and 2.7 fb(-1), respectively. The Z bosons are reconstructed from opposite-sign electron or muon pairs. No statistically signi fi cant deviation from the standard model predictions has been found in the 200-2000 GeV mass range. Upper limits at 95% con fi dence level have been derived on the product of the scalar particle production cross section and the branching fraction of the Z decaying into electrons or muons, which range from 280 to 20 fb for resonance masses between 200 and 2000 GeV.

Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., et al. (2017). Search for high-mass Zγ resonances in e⁺e⁻γ and μ⁺μ⁻γ final states in proton-proton collisions at √s=8 and 13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2017(1) [10.1007/JHEP01(2017)076].

Search for high-mass Zγ resonances in e⁺e⁻γ and μ⁺μ⁻γ final states in proton-proton collisions at √s=8 and 13 TeV

CIOCCI, MARIA AGNESE;MESSINEO, ALBERTO MARIA;
2017-01-01

Abstract

This paper describes the search for a high-mass narrow-width scalar particle decaying into a Z boson and a photon. The analysis is performed using proton-proton collision data recorded with the CMS detector at the LHC at center-of-mass energies of 8 and 13TeV, corresponding to integrated luminosities of 19.7 and 2.7 fb(-1), respectively. The Z bosons are reconstructed from opposite-sign electron or muon pairs. No statistically signi fi cant deviation from the standard model predictions has been found in the 200-2000 GeV mass range. Upper limits at 95% con fi dence level have been derived on the product of the scalar particle production cross section and the branching fraction of the Z decaying into electrons or muons, which range from 280 to 20 fb for resonance masses between 200 and 2000 GeV.
2017
Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., et al. (2017). Search for high-mass Zγ resonances in e⁺e⁻γ and μ⁺μ⁻γ final states in proton-proton collisions at √s=8 and 13 TeV. JOURNAL OF HIGH ENERGY PHYSICS, 2017(1) [10.1007/JHEP01(2017)076].
File in questo prodotto:
File Dimensione Formato  
JHEP01(2017)076.pdf

accesso aperto

Tipologia: PDF editoriale
Licenza: Creative commons
Dimensione 987.22 kB
Formato Adobe PDF
987.22 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1327585