A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector
Publisher DOI
Abstract
A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1fb⁻¹ of 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 → qq̅'bb̅
bis 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 1 TeV 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 → qq̅'bb̅ resonance.
bis 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 1 TeV 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 → qq̅'bb̅ resonance.
Date Issued
2018-02
Publication Type
Article
Subject(s)
Language(s)
en
Author(s)
Rimoldi, Marco | |
Mullier, Geoffrey | |
Miucci, Antonio | |
Merlassino, Claudia | |
Meloni, Federico | |
Ereditato, Antonio |
Additional Credits
Journal
Physics letters. B
Publisher
Elsevier
ISSN
0370-2693
Access(Rights)
open.access