TY - JOUR
T1 - A search for resonances decaying into a Higgs boson and a new particle X in the XH → qqbb final state with the ATLAS detector
AU - M., Aaboud
AU - Åkesson, T.
AU - Bocchetta, S.
AU - Corrigan, E.
AU - Doglioni, C.
AU - Hedberg, V.
AU - Jarlskog, G.
AU - Kalderon, C.
AU - Kellermann, E.
AU - Konya, B.
AU - Lytken, E.
AU - Mankinen, K.
AU - Mjörnmark, U.
AU - Poettgen, R.
AU - Poulsen, T.
AU - Smirnova, O.
AU - Viazlo, O.
AU - L., Zwalinski
AU - ATLAS Collaboration
PY - 2018
Y1 - 2018
N2 - 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.
AB - 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.
U2 - 10.1016/j.physletb.2018.01.042
DO - 10.1016/j.physletb.2018.01.042
M3 - Article
SN - 0370-2693
VL - 779
SP - 24
EP - 45
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -