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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

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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. / The ATLAS collaboration.

In: Physics Letters B, Vol. 786, 10.11.2018, p. 134-155.

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@article{33a3dabdf9804268975ed3e4009e89c2,
title = "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",
abstract = "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.",
author = "{The ATLAS collaboration} and Barton, {Adam Edward} and Bertram, {Iain Alexander} and Guennadi Borissov and Bouhova-Thacker, {Evelina Vassileva} and Harald Fox and Henderson, {Robert Charles William} and Jones, {Roger William Lewis} and Vakhtang Kartvelishvili and Long, {Robin Eamonn} and Love, {Peter Allan} and Muenstermann, {Daniel Matthias Alfred} and Parker, {Adam Jackson} and Maria Smizanska and Amy Tee and Walder, {James William} and Wharton, {Andrew Mark} and Ben Whitmore",
year = "2018",
month = nov
day = "10",
doi = "10.1016/j.physletb.2018.09.024",
language = "English",
volume = "786",
pages = "134--155",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",

}

RIS

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 -