|
Title
|
|
|
|
Search for long-lived particles using out-of-time trackless jets in proton-proton collisions at √s=13 TeV
| |
|
Author
|
|
|
|
| |
|
Institution/Organisation
|
|
|
|
CMS Collaboration
| |
|
Abstract
|
|
|
|
| A search for long-lived particles decaying in the outer regions of the CMS silicon tracker or in the calorimeters is presented. The search is based on a data sample of proton-proton collisions at root s = 13TeV recorded with the CMS detector at the LHC in 2016-2018, corresponding to an integrated luminosity of 138 fb(-1). A novel technique, using nearly trackless and out-of-time jet information combined in a deep neural network discriminator, is employed to identify decays of long-lived particles. The results are interpreted in a simplified model of chargino-neutralino production, where the neutralino is the next-to-lightest supersymmetric particle, is long-lived, and decays to a gravitino and either a Higgs or Z boson. This search is most sensitive to neutralino proper decay lengths of approximately 0.5 m, for which masses up to 1.18TeV are excluded at 95% confidence level. The current search is the best result to date in the mass range from the kinematic limit imposed by the Higgs boson mass up to 1.8TeV. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Journal of high energy physics. - Bristol
| |
|
Publication
|
|
|
|
Bristol
:
2023
| |
|
ISSN
|
|
|
|
1126-6708
1029-8479
[online]
| |
|
DOI
|
|
|
|
10.1007/JHEP07(2023)210
| |
|
Volume/pages
|
|
|
|
7
(2023)
, p. 1-52
| |
|
Article Reference
|
|
|
|
210
| |
|
ISI
|
|
|
|
001061829600001
| |
|
Medium
|
|
|
|
E-only publicatie
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|