Sequential displaced vertices: Novel collider signature for long-lived particles

In this paper, we point out a novel signature of physics beyond the Standard Model which could potentially be observed both at the Large Hadron Collider (LHC) and at future colliders. This signature, which emerges naturally within many proposed extensions of the Standard Model, results from the multiple displaced vertices associated with the successive decays of unstable, long-lived particles along the same decay chain. We call such a sequence of displaced vertices a “tumbler.” We examine the prospects for observing tumblers at the LHC and assess the extent to which tumbler signatures can be distinguished from other signatures of new physics which also involve multiple displaced vertices within the same collider event. As part of this analysis, we also develop a procedure for reconstructing the masses and lifetimes of the particles involved in the corresponding decay chains. We find that the prospects for discovering and distinguishing tumblers can be greatly enhanced by exploiting precision timing information such as would be provided by the CMS timing layer at the high-luminosity LHC. Our analysis therefore provides strong additional motivation for continued efforts to improve the timing capabilities of collider detectors at the LHC and beyond.

Title	Sequential displaced vertices: Novel collider signature for long-lived particles
Creator	Kim, D.
	Dienes, K. R.
	Thomas, Brooks
	Leininger, T. T.
Publisher	Physical Review D
Academic Department	Physics
Division	Natural Sciences
Organization	Lafayette College
Date Issued	November 9, 2022
Date Available	2022-11-10
Type	Article
Language	English
Bibliographic Citation	Dienes, K. R., et al. (2022 Nov 09) "Sequential displaced vertices: Novel collider signature for long-lived particles." Physical Review D 106: 095012.
Standard Identifier	DOI 10.1103/PhysRevD.106.095012
Standard Identifier	Handle 10385/vd66w1323
Permalink	http://hdl.handle.net/10385/vd66w1323
Rights Statement	Creative Commons - Attribution
Rights Holders	Thomas, Brooks
	Dienes, K. R.
	Leininger, T. T.
	Kim, D.