Search for Higgs boson decays into pairs of light (pseudo)scalar particles in the γγjj final state in pp 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 Higgs boson decays into pairs of light (pseudo)scalar particles in the γγjj final state in pp collisions at √s = 13 TeV with the ATLAS detector. Physics letters. B, 782, pp. 750-767. Elsevier 10.1016/j.physletb.2018.06.011

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This Letter presents a search for exotic decays of the Higgs boson to a pair of new (pseudo)scalar particles, H → aa, where the aparticle has a mass in the range 20–60 GeV, and where one of the abosons decays into a pair of photons and the other to a pair of gluons. The search is performed in event samples enhanced in vector-boson fusion Higgs boson production by requiring two jets with large invariant mass in addition to the Higgs boson candidate decay products. The analysis is based on the full dataset of pp collisions at √s = 13 TeV recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider, corresponding to an integrated luminosity of 36.7 fb⁻¹. The data are in agreement with the Standard Model predictions and an upper limit at the 95% confidence level is placed on the production cross section times the branching ratio for the decay H → aa → γγgg. This limit ranges from 3.1 pb to 9.0 pb depending on the mass of the aboson.

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:

0370-2693

Publisher:

Elsevier

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

25 Jun 2019 12:57

Last Modified:

12 Mar 2021 15:56

Publisher DOI:

10.1016/j.physletb.2018.06.011

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt

BORIS DOI:

10.7892/boris.129062

URI:

https://boris.unibe.ch/id/eprint/129062

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