A search for resonances decaying into a Higgs boson and a new particle X in the XH→qqbb final state with the ATLAS detector

, The ATLAS collaboration (2018) A search for resonances decaying into a Higgs boson and a new particle X in the XH→qqbb final state with the ATLAS detector. Physics Letters B, 779. pp. 24-45. ISSN 0370-2693

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Abstract

A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1 fb−1of proton–proton collision data at √s=13 TeV collected during 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. The particle X is assumed to decay to a pair of light quarks, and the fully hadronic final state XH → qq¯'bb¯ is analysed. The search considers the regime of high XH resonance masses, where the X and H bosons are both highly Lorentz-boosted and are each reconstructed using a single jet with large radius parameter. A two-dimensional phase space of XH mass versus X mass is scanned for evidence of a signal, over a range of XH resonance mass values between 1TeV and 4 TeV, and for X particles with masses from 50 GeV to 1000 GeV. All search results are consistent with the expectations for the background due to Standard Model processes, and 95% CL upper limits are set, as a function of XH and X masses, on the production cross-section of the XH → qq¯'bb¯ resonance.

Item Type:
Journal Article
Journal or Publication Title:
Physics Letters B
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3106
Subjects:
ID Code:
128530
Deposited By:
Deposited On:
24 Oct 2018 09:42
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Jan 2021 06:52