A search for the Z γ decay mode of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications; T.M. Carter; M. Faucci Giannelli; A. Hasib; M.P. Heath; S. Palazzo; A. Søgaard; A. Strubig; E.P. Takeva; A.J. Taylor; N. Themistokleous; E.M. Villhauer

doi:10.1016/j.physletb.2020.135754

A search for the Z γ decay mode of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector

ATLAS Publications, T.M. Carter, M. Faucci Giannelli, A. Hasib, M.P. Heath, S. Palazzo, A. Søgaard, A. Strubig, E.P. Takeva, A.J. Taylor, N. Themistokleous, E.M. Villhauer

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A search for the Z γ decay of the Higgs boson, with Z boson decays into pairs of electrons or muons is presented. The analysis uses proton–proton collision data at √s = 13 TeV corresponding to an integrated luminosity of 139 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. The observed data are consistent with the expected background with a p-value of 1.3%. An upper limit at 95% confidence level on the production cross-section times the branching ratio for pp → H → Z γ is set at 3.6 times the Standard Model prediction while 2.6 times is expected in the presence of the Standard Model Higgs boson. The best-fit value for the signal yield normalised to the Standard Model prediction is 2.0+1.0−0.9 where the statistical component of the uncertainty is dominant.

Original language	English
Article number	135754
Pages (from-to)	1-21
Number of pages	21
Journal	Physics Letters B
Volume	809
Early online date	8 Sept 2020
DOIs	https://doi.org/10.1016/j.physletb.2020.135754
Publication status	Published - 10 Oct 2020

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http://arxiv.org/abs/2005.05382

1 Active
5 Finished

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/10/22 → 30/09/25
Project: Research

Cite this

ATLAS Publications, Carter, T. M., Faucci Giannelli, M., Hasib, A., Heath, M. P., Palazzo, S., Søgaard, A., Strubig, A., Takeva, E. P., Taylor, A. J., Themistokleous, N., & Villhauer, E. M. (2020). A search for the Z γ decay mode of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector. Physics Letters B, 809, 1-21. Article 135754. https://doi.org/10.1016/j.physletb.2020.135754

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title = "A search for the Z γ decay mode of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector",

abstract = "A search for the Z γ decay of the Higgs boson, with Z boson decays into pairs of electrons or muons is presented. The analysis uses proton–proton collision data at √s = 13 TeV corresponding to an integrated luminosity of 139 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. The observed data are consistent with the expected background with a p-value of 1.3\%. An upper limit at 95\% confidence level on the production cross-section times the branching ratio for pp → H → Z γ is set at 3.6 times the Standard Model prediction while 2.6 times is expected in the presence of the Standard Model Higgs boson. The best-fit value for the signal yield normalised to the Standard Model prediction is 2.0+1.0−0.9 where the statistical component of the uncertainty is dominant.",

author = "\{ATLAS Publications\} and Clark, \{Philip James\} and Sinead Farrington and Yanyan Gao and Christos Leonidopoulos and Martin, \{Victoria Jane\} and Liza Mijovic and Benjamin Wynne and T.M. Carter and \{Faucci Giannelli\}, M. and A. Hasib and M.P. Heath and S. Palazzo and A. S{\o}gaard and A. Strubig and E.P. Takeva and A.J. Taylor and N. Themistokleous and E.M. Villhauer",

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doi = "10.1016/j.physletb.2020.135754",

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ATLAS Publications, Carter, TM, Faucci Giannelli, M, Hasib, A, Heath, MP, Palazzo, S, Søgaard, A, Strubig, A, Takeva, EP, Taylor, AJ, Themistokleous, N & Villhauer, EM 2020, 'A search for the Z γ decay mode of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector', Physics Letters B, vol. 809, 135754, pp. 1-21. https://doi.org/10.1016/j.physletb.2020.135754

TY - JOUR

T1 - A search for the Z γ decay mode of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector

AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Carter, T.M.

AU - Faucci Giannelli, M.

AU - Hasib, A.

AU - Heath, M.P.

AU - Palazzo, S.

AU - Søgaard, A.

AU - Strubig, A.

AU - Takeva, E.P.

AU - Taylor, A.J.

AU - Themistokleous, N.

AU - Villhauer, E.M.

PY - 2020/10/10

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AB - A search for the Z γ decay of the Higgs boson, with Z boson decays into pairs of electrons or muons is presented. The analysis uses proton–proton collision data at √s = 13 TeV corresponding to an integrated luminosity of 139 fb−1 recorded by the ATLAS detector at the Large Hadron Collider. The observed data are consistent with the expected background with a p-value of 1.3%. An upper limit at 95% confidence level on the production cross-section times the branching ratio for pp → H → Z γ is set at 3.6 times the Standard Model prediction while 2.6 times is expected in the presence of the Standard Model Higgs boson. The best-fit value for the signal yield normalised to the Standard Model prediction is 2.0+1.0−0.9 where the statistical component of the uncertainty is dominant.

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DO - 10.1016/j.physletb.2020.135754

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JO - Physics Letters B

JF - Physics Letters B

M1 - 135754

ER -

A search for the Z γ decay mode of the Higgs boson in pp collisions at √s = 13 TeV with the ATLAS detector

Abstract

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Projects

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

Cite this