Optimizing pixel tracklet searches for shorter lifetimes

Gignac, Matthew; Kilic, Can; Mahbubani, Rakhi; Youn, Taewook (2023) Optimizing pixel tracklet searches for shorter lifetimes. Journal of High Energy Physics, 2023 . ISSN 1029-8479

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Abstract

Pixel tracklets, disappearing tracks reconstructed with only pixel hits, have proven to be a promising technique in LHC analyses to search for dark matter candidates at the LHC that belong to a nearly-degenerate electroweak multiplet. However, a Pseudo-Dirac electroweak doublet fermion, arguably the most interesting such possibility, has a shorter lifetime and therefore existing tracklet searches are less sensitive in this case. We assess the performance of a tracklet search optimized for shorter lifetimes by requiring only three pixel hits for the tracklet reconstruction, and by demanding an accompanying soft track for suppressing backgrounds. We estimate how far the sensitivity of existing searches can be extended into the region of parameter space with this optimized search.

Item Type:	Article
Additional Information:	Imported from arXiv
Uncontrolled Keywords:	dark matter at colliders; supersymmetry
Subjects:	NATURAL SCIENCES > Physics > Physics of Elementary Particles and Fields
Divisions:	Theoretical Physics Division
Depositing User:	Rakhi Nandalal Mahbubani
Date Deposited:	06 Feb 2024 14:31
URI:	http://fulir.irb.hr/id/eprint/8496
DOI:	10.1007/JHEP03(2023)040

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