Search for the Production of a Long-Lived Neutral Particle Decaying within the ATLAS Hadronic Calorimeter in Association with a Z Boson from pp Collisions at s =13 TeV
(2019) In Physical Review Letters 122(15).- Abstract
- This Letter presents a search for the production of a long-lived neutral particle (Zd) decaying within the ATLAS hadronic calorimeter, in association with a standard model (SM) Z boson produced via an intermediate scalar boson, where Z→+ (=e, μ). The data used were collected by the ATLAS detector during 2015 and 2016 pp collisions with a center-of-mass energy of s=13 TeV at the Large Hadron Collider and correspond to an integrated luminosity of 36.1±0.8 fb-1. No significant excess of events is observed above the expected background. Limits on the production cross section of the scalar boson times its decay branching fraction into the long-lived neutral particle are derived as a function of the mass of the intermediate scalar boson, the... (More)
- This Letter presents a search for the production of a long-lived neutral particle (Zd) decaying within the ATLAS hadronic calorimeter, in association with a standard model (SM) Z boson produced via an intermediate scalar boson, where Z→+ (=e, μ). The data used were collected by the ATLAS detector during 2015 and 2016 pp collisions with a center-of-mass energy of s=13 TeV at the Large Hadron Collider and correspond to an integrated luminosity of 36.1±0.8 fb-1. No significant excess of events is observed above the expected background. Limits on the production cross section of the scalar boson times its decay branching fraction into the long-lived neutral particle are derived as a function of the mass of the intermediate scalar boson, the mass of the long-lived neutral particle, and its cτ from a few centimeters to one hundred meters. In the case that the intermediate scalar boson is the SM Higgs boson, its decay branching fraction to a long-lived neutral particle with a cτ approximately between 0.1 and 7 m is excluded with a 95% confidence level up to 10% for mZd between 5 and 15 GeV. © 2019 CERN for the ATLAS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . (Less)
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- author
- author collaboration
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Calorimeters, Neutrons, Tellurium compounds, ATLAS detectors, Branching fractions, Confidence levels, Hadronic calorimeters, Integrated luminosity, Large Hadron Collider, Neutral particles, Production cross section, Bosons
- in
- Physical Review Letters
- volume
- 122
- issue
- 15
- article number
- 151801
- publisher
- American Physical Society
- external identifiers
-
- scopus:85065591238
- pmid:31050493
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.122.151801
- language
- English
- LU publication?
- yes
- additional info
- Export Date: 23 May 2019
- id
- 75d9465e-516e-4cdc-92a0-444c5a69bd91
- date added to LUP
- 2019-05-23 13:58:47
- date last changed
- 2023-04-09 12:51:54
@article{75d9465e-516e-4cdc-92a0-444c5a69bd91, abstract = {{This Letter presents a search for the production of a long-lived neutral particle (Zd) decaying within the ATLAS hadronic calorimeter, in association with a standard model (SM) Z boson produced via an intermediate scalar boson, where Z→+ (=e, μ). The data used were collected by the ATLAS detector during 2015 and 2016 pp collisions with a center-of-mass energy of s=13 TeV at the Large Hadron Collider and correspond to an integrated luminosity of 36.1±0.8 fb-1. No significant excess of events is observed above the expected background. Limits on the production cross section of the scalar boson times its decay branching fraction into the long-lived neutral particle are derived as a function of the mass of the intermediate scalar boson, the mass of the long-lived neutral particle, and its cτ from a few centimeters to one hundred meters. In the case that the intermediate scalar boson is the SM Higgs boson, its decay branching fraction to a long-lived neutral particle with a cτ approximately between 0.1 and 7 m is excluded with a 95% confidence level up to 10% for mZd between 5 and 15 GeV. © 2019 CERN for the ATLAS Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 .}}, author = {{Aaboud, M and Åkesson, Torsten and Bocchetta, Simona and Bryngemark, Lene and Corrigan, Eric and Doglioni, Caterina and Gregersen, Kristian and Brottmann Hansen, Eva and Hedberg, Vincent and Jarlskog, Göran and Kalderon, Charles and Kellermann, Edgar and Konya, Balazs and Lytken, Else and Mankinen, Katja and Marcon, Caterina and Mjörnmark, Ulf and Mullier, Geoffrey and Pöttgen, Ruth and Poulsen, Trine and Smirnova, Oxana and Zwalinski, L}}, issn = {{1079-7114}}, keywords = {{Calorimeters; Neutrons; Tellurium compounds; ATLAS detectors; Branching fractions; Confidence levels; Hadronic calorimeters; Integrated luminosity; Large Hadron Collider; Neutral particles; Production cross section; Bosons}}, language = {{eng}}, number = {{15}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Search for the Production of a Long-Lived Neutral Particle Decaying within the ATLAS Hadronic Calorimeter in Association with a Z Boson from pp Collisions at s =13 TeV}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.122.151801}}, doi = {{10.1103/PhysRevLett.122.151801}}, volume = {{122}}, year = {{2019}}, }