Search for massive long-lived particles decaying semileptonically at $${\sqrt{s}}=13\,\hbox {TeV}$$ s = 13 TeV
Abstract A search is performed for massive long-lived particles (LLPs) decaying semileptonically into a muon and two quarks. Two kinds of LLP production processes were considered. In the first, a Higgs-like boson with mass from 30 to 200...
| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
Springer Berlin Heidelberg
2022
|
| Online Access: | https://hdl.handle.net/1721.1/142219 |
| Summary: | Abstract
A search is performed for massive long-lived particles (LLPs) decaying semileptonically into a muon and two quarks. Two kinds of LLP production processes were considered. In the first, a Higgs-like boson with mass from 30 to 200
$$\text {\,GeV\!/}c^2$$
\,GeV\!/
c
2
is produced by gluon fusion and decays into two LLPs. The analysis covers LLP mass values from 10
$$\text {\,GeV\!/}c^2$$
\,GeV\!/
c
2
up to about one half the Higgs-like boson mass. The second LLP production mode is directly from quark interactions, with LLP masses from 10 to 90
$$\text {\,GeV\!/}c^2$$
\,GeV\!/
c
2
. The LLP lifetimes considered range from 5 to 200 ps. This study uses LHCb data collected from proton-proton collisions at
$$\sqrt{s} = 13\text {\,TeV} $$
s
=
13
\,TeV
, corresponding to an integrated luminosity of 5.4
$$\text {\,fb} ^{-1}$$
\,fb
-
1
. No evidence of these long-lived states has been observed, and upper limits on the production cross-section times branching ratio have been set for each model considered. |
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