A search optimized for new heavy particles decaying to two b-quarks and produced in association with additional b-quarks is reported. The sensitivity is improved by b-tagging at least one lower-pT jet in addition to the two highest-pT jets. The data used in this search correspond to an integrated luminosity of 103 fb-1 collected with a dedicated trijet trigger during the 2017 and 2018 s=13 TeV proton-proton collision runs with the ATLAS detector at the LHC. The search looks for resonant peaks in the b-tagged dijet invariant mass spectrum over a smoothly falling background. The background is estimated with an innovative data-driven method based on orthonormal functions. The observed b-tagged dijet invariant mass spectrum is compatible with the background-only hypothesis. Upper limits at 95% confidence level on a heavy vector-boson production cross section times branching ratio to a pair of b-quarks are derived.

Search for heavy particles in the b -tagged dijet mass distribution with additional b -tagged jets in proton-proton collisions at s =13 TeV with the ATLAS experiment / G. Aad, B.A.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 105:1(2022 Jan 07), pp. 012001.012001-1-012001.012001-22. [10.1103/PhysRevD.105.012001]

Search for heavy particles in the b -tagged dijet mass distribution with additional b -tagged jets in proton-proton collisions at s =13 TeV with the ATLAS experiment

A. Andreazza
Membro del Collaboration Group
;
E. Ballabene
Membro del Collaboration Group
;
A. Carbone
Membro del Collaboration Group
;
L. Carminati
Membro del Collaboration Group
;
S. D'Auria
Membro del Collaboration Group
;
L. Dell'Asta
Membro del Collaboration Group
;
M. Fanti;M. Lazzaroni
Membro del Collaboration Group
;
C. Meroni
Membro del Collaboration Group
;
D.P. Mungo
Membro del Collaboration Group
;
A. Murrone
Membro del Collaboration Group
;
L. Perini
Membro del Collaboration Group
;
F. Piazza
Membro del Collaboration Group
;
F. Ragusa
Membro del Collaboration Group
;
A. Stabile
Membro del Collaboration Group
;
2022

Abstract

A search optimized for new heavy particles decaying to two b-quarks and produced in association with additional b-quarks is reported. The sensitivity is improved by b-tagging at least one lower-pT jet in addition to the two highest-pT jets. The data used in this search correspond to an integrated luminosity of 103 fb-1 collected with a dedicated trijet trigger during the 2017 and 2018 s=13 TeV proton-proton collision runs with the ATLAS detector at the LHC. The search looks for resonant peaks in the b-tagged dijet invariant mass spectrum over a smoothly falling background. The background is estimated with an innovative data-driven method based on orthonormal functions. The observed b-tagged dijet invariant mass spectrum is compatible with the background-only hypothesis. Upper limits at 95% confidence level on a heavy vector-boson production cross section times branching ratio to a pair of b-quarks are derived.
Settore FIS/01 - Fisica Sperimentale
Settore ING-INF/07 - Misure Elettriche e Elettroniche
7-gen-2022
https://journals.aps.org/prd/pdf/10.1103/PhysRevD.105.012001
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/905933
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