Search for light neutral particles decaying promptly into collimated pairs of electrons or muons in pp collisions at s = 13 TeV with the ATLAS detector
Aad, G. ; Åkesson, T.P.A. LU
; Astrand, K.S.V.
LU
; Doglioni, C.
LU
; Ekman, P.A.
LU
; Hedberg, V.
LU
; Herde, H.
LU
; Konya, B.
LU
; Lytken, E.
LU
and Poettgen, R.
LU
, et al.
(2025)
In European Physical Journal C
85(3).
- Abstract
- A search for a dark photon, a new light neutral particle, which decays promptly into collimated pairs of electrons or muons is presented. The search targets dark photons resulting from the exotic decay of the Standard Model Higgs boson, assuming its production via the dominant gluon-gluon fusion mode. The analysis is based on 140fb-1 of data collected with the ATLAS detector at the Large Hadron Collider from proton-proton collisions at a center-of-mass energy of 13 TeV. Events with collimated pairs of electrons or muons are analysed and background contributions are estimated using data-driven techniques. No significant excess in the data above the Standard Model background is observed. Upper limits are set at 95% confidence level on the... (More)
- A search for a dark photon, a new light neutral particle, which decays promptly into collimated pairs of electrons or muons is presented. The search targets dark photons resulting from the exotic decay of the Standard Model Higgs boson, assuming its production via the dominant gluon-gluon fusion mode. The analysis is based on 140fb-1 of data collected with the ATLAS detector at the Large Hadron Collider from proton-proton collisions at a center-of-mass energy of 13 TeV. Events with collimated pairs of electrons or muons are analysed and background contributions are estimated using data-driven techniques. No significant excess in the data above the Standard Model background is observed. Upper limits are set at 95% confidence level on the branching ratio of the Higgs boson decay into dark photons between 0.001% and 5%, depending on the assumed dark photon mass and signal model. © The Author(s) 2025. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8e2f482b-c448-47f4-9595-65f057064f0c
- author
- Aad, G.
; Åkesson, T.P.A.
LU
; Astrand, K.S.V.
LU
; Doglioni, C.
LU
; Ekman, P.A.
LU
; Hedberg, V.
LU
; Herde, H.
LU
; Konya, B.
LU
; Lytken, E.
LU
and Poettgen, R.
LU
, et al. (More)
- Aad, G.
; Åkesson, T.P.A.
LU
; Astrand, K.S.V.
LU
; Doglioni, C.
LU
; Ekman, P.A.
LU
; Hedberg, V.
LU
; Herde, H.
LU
; Konya, B.
LU
; Lytken, E.
LU
; Poettgen, R.
LU
; Smirnova, O.
LU
; Wallin, E.J.
LU
and Zwalinski, L.
(Less)
- author collaboration
- organization
- publishing date
- 2025
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Colliding beam accelerators, Electrons, Hadrons, Linear accelerators, Photons, Positive ions, A-center, ATLAS detectors, Center-of-mass energies, Exotic decay, Large Hadron Collider, Large-hadron colliders, Neutral particles, Proton proton collisions, Standard-model Higgs bosons, The standard model, Bosons
- in
- European Physical Journal C
- volume
- 85
- issue
- 3
- article number
- 335
- publisher
- Springer Nature
- external identifiers
-
- scopus:105001171987
- ISSN
- 1434-6044
- DOI
- 10.1140/epjc/s10052-025-13916-5
- language
- English
- LU publication?
- yes
- id
- 8e2f482b-c448-47f4-9595-65f057064f0c
- date added to LUP
- 2026-03-06 11:23:09
- date last changed
- 2026-03-06 11:24:24
@article{8e2f482b-c448-47f4-9595-65f057064f0c,
abstract = {{A search for a dark photon, a new light neutral particle, which decays promptly into collimated pairs of electrons or muons is presented. The search targets dark photons resulting from the exotic decay of the Standard Model Higgs boson, assuming its production via the dominant gluon-gluon fusion mode. The analysis is based on 140fb-1 of data collected with the ATLAS detector at the Large Hadron Collider from proton-proton collisions at a center-of-mass energy of 13 TeV. Events with collimated pairs of electrons or muons are analysed and background contributions are estimated using data-driven techniques. No significant excess in the data above the Standard Model background is observed. Upper limits are set at 95% confidence level on the branching ratio of the Higgs boson decay into dark photons between 0.001% and 5%, depending on the assumed dark photon mass and signal model. © The Author(s) 2025.}},
author = {{Aad, G. and Åkesson, T.P.A. and Astrand, K.S.V. and Doglioni, C. and Ekman, P.A. and Hedberg, V. and Herde, H. and Konya, B. and Lytken, E. and Poettgen, R. and Smirnova, O. and Wallin, E.J. and Zwalinski, L.}},
issn = {{1434-6044}},
keywords = {{Colliding beam accelerators; Electrons; Hadrons; Linear accelerators; Photons; Positive ions; A-center; ATLAS detectors; Center-of-mass energies; Exotic decay; Large Hadron Collider; Large-hadron colliders; Neutral particles; Proton proton collisions; Standard-model Higgs bosons; The standard model; Bosons}},
language = {{eng}},
number = {{3}},
publisher = {{Springer Nature}},
series = {{European Physical Journal C}},
title = {{Search for light neutral particles decaying promptly into collimated pairs of electrons or muons in pp collisions at s = 13 TeV with the ATLAS detector}},
url = {{http://dx.doi.org/10.1140/epjc/s10052-025-13916-5}},
doi = {{10.1140/epjc/s10052-025-13916-5}},
volume = {{85}},
year = {{2025}},
}