Search for supersymmetry in final states with missing transverse momentum and multiple b-jets in proton-proton collisions at √s = 13 TeV with the ATLAS detector

Rimoldi, Marco; Mullier, Geoffrey; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Meloni, Federico; Beck, Hans Peter; Ereditato, Antonio (2018). Search for supersymmetry in final states with missing transverse momentum and multiple b-jets in proton-proton collisions at √s = 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2018(6) Springer 10.1007/JHEP06(2018)107

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A search for supersymmetry involving the pair production of gluinos decaying via third-generation squarks into the lightest neutralino (χ̃⁰₁) is reported. It uses LHC proton-proton collision data at a centre-of-mass energy √s = 13 TeV with an integrated luminosity of 36.1 fb⁻¹ collected with the ATLAS detector in 2015 and 2016. The search is performed in events containing large missing transverse momentum and several energetic jets, at least three of which must be identified as originating from b-quarks. To increase the sensitivity, the sample is divided into subsamples based on the presence or absence of electrons or muons. No excess is found above the predicted background. For χ̃⁰₁ masses below approximately 300 GeV, gluino masses of less than 1.97 (1.92) TeV are excluded at 95% confidence level in simplified models involving the pair production of gluinos that decay via top (bottom) squarks. An interpretation of the limits in terms of the branching ratios of the gluinos into third-generation squarks is also provided. These results improve upon the exclusion limits obtained with the 3.2 fb⁻¹ of data collected in 2015.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Haug, Sigve; Weber, Michael and Beck, Hans Peter

Subjects:

500 Science > 530 Physics

ISSN:

1029-8479

Publisher:

Springer

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

27 Jun 2019 09:15

Last Modified:

24 Oct 2019 16:54

Publisher DOI:

10.1007/JHEP06(2018)107

ArXiv ID:

1711.01901

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

BORIS DOI:

10.7892/boris.129097

URI:

https://boris.unibe.ch/id/eprint/129097

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