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Search for new phenomena in final states with b-jets and missing transverse momentum in sv = 13 TeV pp collisions with the ATLAS detector

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Version 2 2023-06-12, 09:49
Version 1 2023-06-09, 23:39
journal contribution
posted on 2023-06-12, 09:49 authored by N L Abraham, Benedict AllbrookeBenedict Allbrooke, Marco AparoMarco Aparo, Lily AsquithLily Asquith, Alessandro CerriAlessandro Cerri, Antonella De SantoAntonella De Santo, Meirin Oan Evans, Mario Grandi, Daniel Christopher Kelsey, Daniela Maria Köck, Batool Safarzadeh Samani, Fabrizio SalvatoreFabrizio Salvatore, Kate ShawKate Shaw, Mario Spina, Thomas StevensonThomas Stevenson, Mark SuttonMark Sutton, Fabrizio Trovato, Iacopo Vivarelli, Ioannis Xiotidis, ATLAS Collaboration, others
The results of a search for new phenomena in final states with b-jets and missing transverse momentum using 139 fb-1 of proton-proton data collected at a centre-of-mass energy sv = 13 TeV by the ATLAS detector at the LHC are reported. The analysis targets final states produced by the decay of a pair-produced supersymmetric bottom squark into a bottom quark and a stable neutralino. The analysis also seeks evidence for models of pair production of dark matter particles produced through the decay of a generic scalar or pseudoscalar mediator state in association with a pair of bottom quarks, and models of pair production of scalar third-generation down-type leptoquarks. No significant excess of events over the Standard Model background expectation is observed in any of the signal regions considered by the analysis. Bottom squark masses below 1270 GeV are excluded at 95% confidence level if the neutralino is massless. In the case of nearly mass-degenerate bottom squarks and neutralinos, the use of dedicated secondary-vertex identification techniques permits the exclusion of bottom squarks with masses up to 660 GeV for mass splittings between the squark and the neutralino of 10 GeV. These limits extend substantially beyond the regions of parameter space excluded by similar ATLAS searches performed previously.

Funding

STFC Experimental Particle Physics 2018 Consolidated Grant; G2740; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/S000798/1

History

Publication status

  • Published

File Version

  • Published version

Journal

Journal of High Energy Physics

ISSN

1029-8479

Publisher

Springer Nature

Page range

1-50

Article number

a93

Department affiliated with

  • Physics and Astronomy Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2021-04-20

First Open Access (FOA) Date

2021-04-20

First Compliant Deposit (FCD) Date

2021-04-19

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