Variations on a Higgs theme
Variations on a Higgs theme
We show how the Z boson can be generated in gluon-gluon fusion and yield two photons, via gg→Z→γγ, through massive fermion loops only, thereby contributing events to a candidate Higgs sample in the diphoton channel. A subleading contribution also exists from q
¯
q→Z→γγ events. Assuming the Standard Model, the corresponding event rates are negligible at the Large Hadron Collider stages of 7 and 8 TeV, given the luminosities collected therein (about 5 and 20 fb−1, respectively). Conversely, at 14 TeV, the first process becomes accessible for luminosities of order 300 fb−1. Finally, we show how additional fermion states entering such loops, in production, in decay or in both cases, could affect the predictions in this channel by curiously mimicking Higgs signals.
hep-ph
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
12 January 2015
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Abstract
We show how the Z boson can be generated in gluon-gluon fusion and yield two photons, via gg→Z→γγ, through massive fermion loops only, thereby contributing events to a candidate Higgs sample in the diphoton channel. A subleading contribution also exists from q
¯
q→Z→γγ events. Assuming the Standard Model, the corresponding event rates are negligible at the Large Hadron Collider stages of 7 and 8 TeV, given the luminosities collected therein (about 5 and 20 fb−1, respectively). Conversely, at 14 TeV, the first process becomes accessible for luminosities of order 300 fb−1. Finally, we show how additional fermion states entering such loops, in production, in decay or in both cases, could affect the predictions in this channel by curiously mimicking Higgs signals.
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Published date: 12 January 2015
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18 pages, 1 table, 4 figures
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hep-ph
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Local EPrints ID: 411746
URI: http://eprints.soton.ac.uk/id/eprint/411746
ISSN: 1550-7998
PURE UUID: 945f69b3-ef69-4aa4-99b0-72a898b1055a
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Date deposited: 23 Jun 2017 16:31
Last modified: 13 Mar 2019 19:43
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