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

M., Aaboud ; Åkesson, T. LU orcid ; Bocchetta, S. LU ; Corrigan, E. LU ; Doglioni, C. LU ; Hedberg, V. LU ; Jarlskog, G. LU ; Kalderon, C. LU ; Kellermann, E. LU and Konya, B. LU , et al. (2018) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 779. p.24-45
Abstract
A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1 fb−1 of proton–proton collision data at s=13TeV 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 1 TeV and 4 TeV, and for X particles with... (More)
A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1 fb−1 of proton–proton collision data at s=13TeV 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 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→qq¯′bb¯ resonance. (Less)
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publishing date
type
Contribution to journal
publication status
published
subject
in
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
volume
779
pages
22 pages
publisher
Elsevier
external identifiers
  • scopus:85046461175
ISSN
0370-2693
DOI
10.1016/j.physletb.2018.01.042
language
English
LU publication?
yes
id
fdff6a73-3c5e-462d-a93d-9aae51595b36
date added to LUP
2022-04-05 08:28:08
date last changed
2023-05-10 15:25:49
@article{fdff6a73-3c5e-462d-a93d-9aae51595b36,
  abstract     = {{A search for heavy resonances decaying into a Higgs boson (H) and a new particle (X) is reported, utilizing 36.1 fb−1 of proton–proton collision data at s=13TeV 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 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→qq¯′bb¯ resonance.}},
  author       = {{M., Aaboud and Åkesson, T. and Bocchetta, S. and Corrigan, E. and Doglioni, C. and Hedberg, V. and Jarlskog, G. and Kalderon, C. and Kellermann, E. and Konya, B. and Lytken, E. and Mankinen, K. and Mjörnmark, U. and Poettgen, R. and Poulsen, T. and Smirnova, O. and Viazlo, O. and L., Zwalinski}},
  issn         = {{0370-2693}},
  language     = {{eng}},
  pages        = {{24--45}},
  publisher    = {{Elsevier}},
  series       = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}},
  title        = {{A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector}},
  url          = {{http://dx.doi.org/10.1016/j.physletb.2018.01.042}},
  doi          = {{10.1016/j.physletb.2018.01.042}},
  volume       = {{779}},
  year         = {{2018}},
}