Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Searches for exclusive Higgs and Z boson decays into J/ψ γ, ψ(2S) γ, and ϒ(nS) γ at √s=13 TeV with the ATLAS detector
AU - The ATLAS collaboration
AU - Barton, Adam Edward
AU - Bertram, Iain Alexander
AU - Borissov, Guennadi
AU - Bouhova-Thacker, Evelina Vassileva
AU - Fox, Harald
AU - Henderson, Robert Charles William
AU - Jones, Roger William Lewis
AU - Kartvelishvili, Vakhtang
AU - Long, Robin Eamonn
AU - Love, Peter Allan
AU - Muenstermann, Daniel Matthias Alfred
AU - Parker, Adam Jackson
AU - Smizanska, Maria
AU - Tee, Amy
AU - Walder, James William
AU - Wharton, Andrew Mark
AU - Whitmore, Ben
PY - 2018/11/10
Y1 - 2018/11/10
N2 - Searches for the exclusive decays of the Higgs and Z bosons into a J/ψ, ψ(2S), or ϒ(nS) (n = 1, 2, 3) meson and a photon are performed with a pp collision data sample corresponding to an integrated luminosity of 36.1fb−1collected at √s = 13 TeV with the ATLAS detector at the CERN Large Hadron Collider. No significant excess of events is observed above the expected backgrounds, and 95% confidence-level upper limits on the branching fractions of the Higgs boson decays to J /ψ γ, ψ(2S) γ, and ϒ(nS) γof 3.5 ×10−4, 2.0 ×10−3, and (4.9, 5.9, 5.7) ×10−4, respectively, are obtained assuming Standard Model production. The corresponding 95% confidence-level upper limits for the branching fractions of the Zboson decays are 2.3 ×10−6, 4.5 × 10−6and (2.8, 1.7, 4.8) × 10−6, respectively.
AB - Searches for the exclusive decays of the Higgs and Z bosons into a J/ψ, ψ(2S), or ϒ(nS) (n = 1, 2, 3) meson and a photon are performed with a pp collision data sample corresponding to an integrated luminosity of 36.1fb−1collected at √s = 13 TeV with the ATLAS detector at the CERN Large Hadron Collider. No significant excess of events is observed above the expected backgrounds, and 95% confidence-level upper limits on the branching fractions of the Higgs boson decays to J /ψ γ, ψ(2S) γ, and ϒ(nS) γof 3.5 ×10−4, 2.0 ×10−3, and (4.9, 5.9, 5.7) ×10−4, respectively, are obtained assuming Standard Model production. The corresponding 95% confidence-level upper limits for the branching fractions of the Zboson decays are 2.3 ×10−6, 4.5 × 10−6and (2.8, 1.7, 4.8) × 10−6, respectively.
U2 - 10.1016/j.physletb.2018.09.024
DO - 10.1016/j.physletb.2018.09.024
M3 - Journal article
VL - 786
SP - 134
EP - 155
JO - Physics Letters B
JF - Physics Letters B
SN - 0370-2693
ER -