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Search for direct production of electroweakinos in fnal states with one lepton, jets and missing transverse momentum in pp collisions at √s = 13 TeV with the ATLAS detector ATLAS Collaboration
Abstract
Searches for electroweak production of wino-like chargino pairs, χ˜ + 1 χ˜ − 1 , and of wino-like chargino and next-to-lightest neutralino, χ˜ ± 1 χ˜ 0 2 , are presented. The models explored assume that the charginos decay into a W boson and the lightest neutralino, χ˜ ± 1 → W±χ˜ 0 1 . The next-to-lightest neutralinos are degenerate in mass with the chargino and decay to χ˜ 0 1 and either a Z or a Higgs boson, χ˜ 0 2 → Zχ˜ 0 1 or hχ˜ 0 1 . The searches exploit the presence of a single isolated lepton and missing transverse momentum from the W boson decay products and the lightest neutralinos, and the presence of jets from hadronically decaying Z or W bosons or from the Higgs boson decaying into a pair of b-quarks. The searches use 139 fb−1 of √ s = 13 TeV proton-proton collisions data collected by the ATLAS detector at the Large Hadron Collider between 2015 and 2018. No deviations from the Standard Model expectations are found, and 95% confdence level exclusion limits are set. Chargino masses ranging from 260 to 520 GeV are excluded for a massless χ˜ 0 1 in chargino pair production models. Degenerate chargino and next-to-lightest neutralino masses ranging from 260 to 420 GeV are excluded for a massless χ˜ 0 1 for χ˜ 0 2 → Zχ˜ 0 1 . For decays through an on-shell Higgs boson and for mass-splitting between χ˜ ± 1 /χ˜ 0 2 and χ˜ 0 1 as small as the Higgs boson mass, mass limits are improved by up to 40 GeV in the range of 200–260 GeV and 280–470 GeV compared to previous ATLAS constraints.
Item Metadata
Title |
Search for direct production of electroweakinos in fnal states with one lepton, jets and missing transverse momentum in pp collisions at √s = 13 TeV with the ATLAS detector
|
Creator | |
Publisher |
Springer Berlin Heidelberg
|
Date Issued |
2023-12-27
|
Description |
Searches for electroweak production of wino-like chargino pairs, χ˜
+
1 χ˜
−
1
, and of
wino-like chargino and next-to-lightest neutralino, χ˜
±
1 χ˜
0
2
, are presented. The models explored
assume that the charginos decay into a W boson and the lightest neutralino, χ˜
±
1 → W±χ˜
0
1
.
The next-to-lightest neutralinos are degenerate in mass with the chargino and decay to χ˜
0
1
and
either a Z or a Higgs boson, χ˜
0
2 → Zχ˜
0
1
or hχ˜
0
1
. The searches exploit the presence of a single
isolated lepton and missing transverse momentum from the W boson decay products and the
lightest neutralinos, and the presence of jets from hadronically decaying Z or W bosons or from
the Higgs boson decaying into a pair of b-quarks. The searches use 139 fb−1 of √
s = 13 TeV
proton-proton collisions data collected by the ATLAS detector at the Large Hadron Collider
between 2015 and 2018. No deviations from the Standard Model expectations are found, and
95% confdence level exclusion limits are set. Chargino masses ranging from 260 to 520 GeV
are excluded for a massless χ˜
0
1
in chargino pair production models. Degenerate chargino and
next-to-lightest neutralino masses ranging from 260 to 420 GeV are excluded for a massless
χ˜
0
1
for χ˜
0
2 → Zχ˜
0
1
. For decays through an on-shell Higgs boson and for mass-splitting between
χ˜
±
1
/χ˜
0
2
and χ˜
0
1
as small as the Higgs boson mass, mass limits are improved by up to 40 GeV
in the range of 200–260 GeV and 280–470 GeV compared to previous ATLAS constraints.
|
Subject | |
Genre | |
Type | |
Language |
eng
|
Date Available |
2024-10-24
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
Attribution 4.0 International (CC BY 4.0)
|
DOI |
10.14288/1.0447094
|
URI | |
Affiliation | |
Citation |
Journal of High Energy Physics. 2023 Dec 27;2023(12):167
|
Publisher DOI |
10.1007/JHEP12(2023)167
|
Peer Review Status |
Reviewed
|
Scholarly Level |
Faculty
|
Copyright Holder |
The Author(s)
|
Rights URI | |
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution 4.0 International (CC BY 4.0)