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Search for long-lived charginos based on a disappearing-track signature using 136 fb $$^{-1}$$ - 1... ATLAS Collaboration
Abstract
A search for long-lived charginos produced either directly or in the cascade decay of heavy prompt gluino states is presented. The search is based on proton–proton collision data collected at a centre-of-mass energy of $$\sqrt{s}$$ s = 13 T $$\text {eV}$$ eV between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 136 fb $$^{-1}$$ - 1 . Long-lived charginos are characterised by a distinct signature of a short and then disappearing track, and are reconstructed using at least four measurements in the ATLAS pixel detector, with no subsequent measurements in the silicon-microstrip tracking volume nor any associated energy deposits in the calorimeter. The final state is complemented by a large missing transverse-momentum requirement for triggering purposes and at least one high-transverse-momentum jet. No excess above the expected backgrounds is observed. Exclusion limits are set at 95% confidence level on the masses of the chargino and gluino for different chargino lifetimes. Chargino masses up to 660 (210) G $$\text {eV}$$ eV are excluded in scenarios where the chargino is a pure wino (higgsino). For charginos produced during the cascade decay of a heavy gluino, gluinos with masses below 2.1 T $$\text {eV}$$ eV are excluded for a chargino mass of 300 G $$\text {eV}$$ eV and a lifetime of 0.2 ns.
Item Metadata
Title |
Search for long-lived charginos based on a disappearing-track signature using 136 fb
$$^{-1}$$
-
1
of pp collisions at
$$\sqrt{s}$$
s
= 13 TeV with the ATLAS detector
|
Creator | |
Publisher |
Springer Berlin Heidelberg
|
Date Issued |
2022-07-11
|
Description |
A search for long-lived charginos produced either directly or in the cascade decay of heavy prompt gluino states is presented. The search is based on proton–proton collision data collected at a centre-of-mass energy of
$$\sqrt{s}$$
s
= 13 T
$$\text {eV}$$
eV
between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 136 fb
$$^{-1}$$
-
1
. Long-lived charginos are characterised by a distinct signature of a short and then disappearing track, and are reconstructed using at least four measurements in the ATLAS pixel detector, with no subsequent measurements in the silicon-microstrip tracking volume nor any associated energy deposits in the calorimeter. The final state is complemented by a large missing transverse-momentum requirement for triggering purposes and at least one high-transverse-momentum jet. No excess above the expected backgrounds is observed. Exclusion limits are set at 95% confidence level on the masses of the chargino and gluino for different chargino lifetimes. Chargino masses up to 660 (210) G
$$\text {eV}$$
eV
are excluded in scenarios where the chargino is a pure wino (higgsino). For charginos produced during the cascade decay of a heavy gluino, gluinos with masses below 2.1 T
$$\text {eV}$$
eV
are excluded for a chargino mass of 300 G
$$\text {eV}$$
eV
and a lifetime of 0.2 ns.
|
Genre | |
Type | |
Language |
eng
|
Date Available |
2023-01-04
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
Attribution 4.0 International (CC BY 4.0)
|
DOI |
10.14288/1.0422949
|
URI | |
Affiliation | |
Citation |
The European Physical Journal C. 2022 Jul 11;82(7):606
|
Publisher DOI |
10.1140/epjc/s10052-022-10489-5
|
Peer Review Status |
Reviewed
|
Scholarly Level |
Faculty; Researcher; Other
|
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)