Search for new long-lived particles at root s=13 TeV

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1-s2.0-S0370269318302089-main.pdf (1.76 MB)

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OA Location

https://www.sciencedirect.com/science/article/pii/S0370269318302089?via=ihub

Author(s)

Sirunyan, AM

Tumasyan, A

Adam, W

Ambrogi, F

Asilar, E

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Type

Journal Article

Abstract

A search for long-lived particles was performed with data corresponding to an integrated luminosity of 2.6 fb−1 collected at a center-of-mass energy of 13 TeV by the CMS experiment in 2015. The analysis exploits two customized topological trigger algorithms, and uses the multiplicity of displaced jets to search for the presence of a signal decay occurring at distances between 1 and 1000 mm. The results can be interpreted in a variety of different models. For pair-produced long-lived particles decaying to two b quarks and two leptons with equal decay rates between lepton flavors, cross sections larger than 2.5 fb are excluded for proper decay lengths between 70–100 mm for a long-lived particle mass of 1130 GeV at 95% confidence. For a specific model of pair-produced, long-lived top squarks with R-parity violating decays to a b quark and a lepton, masses below 550–1130 GeV are excluded at 95% confidence for equal branching fractions between lepton flavors, depending on the squark decay length. This mass bound is the most stringent to date for top squark proper decay lengths greater than 3 mm.

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Date Issued

2018-05-10

Date Acceptance

2018-03-07

Citation

PHYSICS LETTERS B, 2018, 780, pp.432-454

URI

http://hdl.handle.net/10044/1/60965

DOI

10.1016/j.physletb.2018.03.019

ISSN

0370-2693

Publisher

ELSEVIER SCIENCE BV

Start Page

432

End Page

454

Journal / Book Title

PHYSICS LETTERS B

Volume

780

Copyright Statement

© 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/4.0/).

Identifier

http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000432187800065&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202

Subjects

Science & Technology

Physical Sciences

Astronomy & Astrophysics

Physics, Nuclear

Physics, Particles & Fields

Physics

CMS

Long-lived particles

GLUINO PRODUCTION

SQUARK

Publication Status

Published

Date Publish Online

2018-03-14