A search is described for a Higgs boson decaying into two photons, one of which has an internal conversion to a muon or an electron pair (ll gamma). The analysis is performed using proton-proton collision data recorded with the CMS detector at the LHC at a centre-of-mass energy of 8TeV, corresponding to an integrated luminosity of 19.7 fb(-1). The events selected have an opposite-sign muon or electron pair and a high transverse momentum photon. No excess above background has been found in the three-body invariant mass range 120 LT m(ll gamma) LT 150 GeV, and limits have been derived for the Higgs boson production cross section times branching fraction for the decay H - GT gamma*gamma - GT ll gamma, where the dilepton invariant mass is less than 20 GeV. For a Higgs boson with m(H) = 125 GeV, a 95% confidence level (CL) exclusion observed (expected) limit is 6.7 (5.9(-1.8)(+2.8)) times the standard model prediction. Additionally, an upper limit at 95% CL on the branching fraction of H - ...GT (J/psi)gamma for the 125 GeV Higgs boson is set at 1.5 x10(-3). (C) 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
TY - JOUR
AU - Khachatryan, V.
AU - Adžić, Petar
AU - Ekmedžić, Marko
AU - Milošević, Jovan
AU - Reković, Vladimir
AU - Đorđević, Miloš
AU - Milenović, Predrag
PY - 2016
UR - https://vinar.vin.bg.ac.rs/handle/123456789/906
AB - A search is described for a Higgs boson decaying into two photons, one of which has an internal conversion to a muon or an electron pair (ll gamma). The analysis is performed using proton-proton collision data recorded with the CMS detector at the LHC at a centre-of-mass energy of 8TeV, corresponding to an integrated luminosity of 19.7 fb(-1). The events selected have an opposite-sign muon or electron pair and a high transverse momentum photon. No excess above background has been found in the three-body invariant mass range 120 LT m(ll gamma) LT 150 GeV, and limits have been derived for the Higgs boson production cross section times branching fraction for the decay H - GT gamma*gamma - GT ll gamma, where the dilepton invariant mass is less than 20 GeV. For a Higgs boson with m(H) = 125 GeV, a 95% confidence level (CL) exclusion observed (expected) limit is 6.7 (5.9(-1.8)(+2.8)) times the standard model prediction. Additionally, an upper limit at 95% CL on the branching fraction of H - GT (J/psi)gamma for the 125 GeV Higgs boson is set at 1.5 x10(-3). (C) 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
PB - Elsevier
T2 - Physics Letters B
T1 - Search for a Higgs boson decaying into gamma*gamma - GT ll gamma with low dilepton mass in pp collisions at root s=8 TeV
VL - 753
SP - 341
EP - 362
DO - 10.1016/j.physletb.2015.12.039
ER -
@article{
author = "Khachatryan, V. and Adžić, Petar and Ekmedžić, Marko and Milošević, Jovan and Reković, Vladimir and Đorđević, Miloš and Milenović, Predrag",
year = "2016",
abstract = "A search is described for a Higgs boson decaying into two photons, one of which has an internal conversion to a muon or an electron pair (ll gamma). The analysis is performed using proton-proton collision data recorded with the CMS detector at the LHC at a centre-of-mass energy of 8TeV, corresponding to an integrated luminosity of 19.7 fb(-1). The events selected have an opposite-sign muon or electron pair and a high transverse momentum photon. No excess above background has been found in the three-body invariant mass range 120 LT m(ll gamma) LT 150 GeV, and limits have been derived for the Higgs boson production cross section times branching fraction for the decay H - GT gamma*gamma - GT ll gamma, where the dilepton invariant mass is less than 20 GeV. For a Higgs boson with m(H) = 125 GeV, a 95% confidence level (CL) exclusion observed (expected) limit is 6.7 (5.9(-1.8)(+2.8)) times the standard model prediction. Additionally, an upper limit at 95% CL on the branching fraction of H - GT (J/psi)gamma for the 125 GeV Higgs boson is set at 1.5 x10(-3). (C) 2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).",
publisher = "Elsevier",
journal = "Physics Letters B",
title = "Search for a Higgs boson decaying into gamma*gamma - GT ll gamma with low dilepton mass in pp collisions at root s=8 TeV",
volume = "753",
pages = "341-362",
doi = "10.1016/j.physletb.2015.12.039"
}
Khachatryan, V., Adžić, P., Ekmedžić, M., Milošević, J., Reković, V., Đorđević, M.,& Milenović, P.. (2016). Search for a Higgs boson decaying into gamma*gamma - GT ll gamma with low dilepton mass in pp collisions at root s=8 TeV. in Physics Letters B
Elsevier., 753, 341-362.
https://doi.org/10.1016/j.physletb.2015.12.039
Khachatryan V, Adžić P, Ekmedžić M, Milošević J, Reković V, Đorđević M, Milenović P. Search for a Higgs boson decaying into gamma*gamma - GT ll gamma with low dilepton mass in pp collisions at root s=8 TeV. in Physics Letters B. 2016;753:341-362.
doi:10.1016/j.physletb.2015.12.039 .
Khachatryan, V., Adžić, Petar, Ekmedžić, Marko, Milošević, Jovan, Reković, Vladimir, Đorđević, Miloš, Milenović, Predrag, "Search for a Higgs boson decaying into gamma*gamma - GT ll gamma with low dilepton mass in pp collisions at root s=8 TeV" in Physics Letters B, 753 (2016):341-362,
https://doi.org/10.1016/j.physletb.2015.12.039 . .
