Search for a new Z′ gauge boson in 4μ events with the ATLAS experiment
(2023) In Journal of High Energy Physics 2023(7).- Abstract
- This paper presents a search for a new Z′ vector gauge boson with the ATLAS experiment at the Large Hadron Collider using pp collision data collected at s = 13 TeV, corresponding to an integrated luminosity of 139 fb −1. The new gauge boson Z′ is predicted by Lμ − Lτ models to address observed phenomena that can not be explained by the Standard Model. The search examines the four-muon (4μ) final state, using a deep learning neural network classifier to separate the Z′ signal from the Standard Model background events. The di-muon invariant masses in the 4μ events are used to extract the Z′ resonance signature. No significant excess of events is observed over the predicted background. Upper limits at a 95% confidence level on the Z′... (More)
- This paper presents a search for a new Z′ vector gauge boson with the ATLAS experiment at the Large Hadron Collider using pp collision data collected at s = 13 TeV, corresponding to an integrated luminosity of 139 fb −1. The new gauge boson Z′ is predicted by Lμ − Lτ models to address observed phenomena that can not be explained by the Standard Model. The search examines the four-muon (4μ) final state, using a deep learning neural network classifier to separate the Z′ signal from the Standard Model background events. The di-muon invariant masses in the 4μ events are used to extract the Z′ resonance signature. No significant excess of events is observed over the predicted background. Upper limits at a 95% confidence level on the Z′ production cross-section times the decay branching fraction of pp → Z′μμ → 4μ are set from 0.31 to 4.3 fb for the Z′ mass ranging from 5 to 81 GeV. The corresponding common coupling strengths, gZ′, of the Z′ boson to the second and third generation leptons above 0.003 – 0.2 have been excluded. [Figure not available: see fulltext.]. © 2023, The Author(s). (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/f6c1754a-f6ef-4b20-bb6b-532b0028a0ee
- author
- author collaboration
- organization
- publishing date
- 2023
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Beyond Standard Model, Hadron-Hadron Scattering
- in
- Journal of High Energy Physics
- volume
- 2023
- issue
- 7
- article number
- 90
- publisher
- Springer
- external identifiers
-
- scopus:85165283434
- ISSN
- 1029-8479
- DOI
- 10.1007/JHEP07(2023)090
- language
- English
- LU publication?
- yes
- id
- f6c1754a-f6ef-4b20-bb6b-532b0028a0ee
- date added to LUP
- 2023-11-16 16:13:57
- date last changed
- 2023-11-16 16:15:00
@article{f6c1754a-f6ef-4b20-bb6b-532b0028a0ee, abstract = {{This paper presents a search for a new Z′ vector gauge boson with the ATLAS experiment at the Large Hadron Collider using pp collision data collected at s = 13 TeV, corresponding to an integrated luminosity of 139 fb −1. The new gauge boson Z′ is predicted by Lμ − Lτ models to address observed phenomena that can not be explained by the Standard Model. The search examines the four-muon (4μ) final state, using a deep learning neural network classifier to separate the Z′ signal from the Standard Model background events. The di-muon invariant masses in the 4μ events are used to extract the Z′ resonance signature. No significant excess of events is observed over the predicted background. Upper limits at a 95% confidence level on the Z′ production cross-section times the decay branching fraction of pp → Z′μμ → 4μ are set from 0.31 to 4.3 fb for the Z′ mass ranging from 5 to 81 GeV. The corresponding common coupling strengths, gZ′, of the Z′ boson to the second and third generation leptons above 0.003 – 0.2 have been excluded. [Figure not available: see fulltext.]. © 2023, The Author(s).}}, author = {{Aad, G. and Åkesson, T.P.A. and Corrigan, E.E. and Doglioni, C. and Ekman, P.A. and Geisen, J. and Hedberg, V. and Herde, H. and Jarlskog, G. and Konya, B. and Lytken, E. and Mjörnmark, J.U. and Mullier, G.A. and Poettgen, R. and Simpson, N.D. and Skorda, E. and Smirnova, O. and Zwalinski, L.}}, issn = {{1029-8479}}, keywords = {{Beyond Standard Model; Hadron-Hadron Scattering}}, language = {{eng}}, number = {{7}}, publisher = {{Springer}}, series = {{Journal of High Energy Physics}}, title = {{Search for a new Z′ gauge boson in 4μ events with the ATLAS experiment}}, url = {{http://dx.doi.org/10.1007/JHEP07(2023)090}}, doi = {{10.1007/JHEP07(2023)090}}, volume = {{2023}}, year = {{2023}}, }