Search for massive long-lived particles decaying semileptonically at √<i>s</i>=13 TeV

Aaij, R, Abdelmotteleb, ASW, Beteta, C Abellan, Gallego, FJ Abudinen, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Agapopoulou, C, Aidala, CA
et al (show 999 more authors) (2022) Search for massive long-lived particles decaying semileptonically at √<i>s</i>=13 TeV. EUROPEAN PHYSICAL JOURNAL C, 82 (4). 373-.

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<jats:title>Abstract</jats:title><jats:p>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<jats:inline-formula><jats:alternatives><jats:tex-math>$$\text {\,GeV\!/}c^2$$</jats:tex-math><mml:math xmlns:mml=""> <mml:mrow> <mml:mtext>\,GeV\!/</mml:mtext> <mml:msup> <mml:mi>c</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> is produced by gluon fusion and decays into two LLPs. The analysis covers LLP mass values from 10<jats:inline-formula><jats:alternatives><jats:tex-math>$$\text {\,GeV\!/}c^2$$</jats:tex-math><mml:math xmlns:mml=""> <mml:mrow> <mml:mtext>\,GeV\!/</mml:mtext> <mml:msup> <mml:mi>c</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula> 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<jats:inline-formula><jats:alternatives><jats:tex-math>$$\text {\,GeV\!/}c^2$$</jats:tex-math><mml:math xmlns:mml=""> <mml:mrow> <mml:mtext>\,GeV\!/</mml:mtext> <mml:msup> <mml:mi>c</mml:mi> <mml:mn>2</mml:mn> </mml:msup> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>. The LLP lifetimes considered range from 5 to 200 ps. This study uses LHCb data collected from proton-proton collisions at <jats:inline-formula><jats:alternatives><jats:tex-math>$$\sqrt{s} = 13\text {\,TeV} $$</jats:tex-math><mml:math xmlns:mml=""> <mml:mrow> <mml:msqrt> <mml:mi>s</mml:mi> </mml:msqrt> <mml:mo>=</mml:mo> <mml:mn>13</mml:mn> <mml:mtext>\,TeV</mml:mtext> </mml:mrow> </mml:math></jats:alternatives></jats:inline-formula>, corresponding to an integrated luminosity of 5.4<jats:inline-formula><jats:alternatives><jats:tex-math>$$\text {\,fb} ^{-1}$$</jats:tex-math><mml:math xmlns:mml=""> <mml:msup> <mml:mtext>\,fb</mml:mtext> <mml:mrow> <mml:mo>-</mml:mo> <mml:mn>1</mml:mn> </mml:mrow> </mml:msup> </mml:math></jats:alternatives></jats:inline-formula>. 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.</jats:p>

Item Type: Article
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 31 Aug 2022 07:50
Last Modified: 14 Mar 2024 22:50
DOI: 10.1140/epjc/s10052-022-10186-3
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