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Variations on a Higgs theme

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
1550-7998
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614
Moretti, S.
b57cf0f0-4bc3-4e02-96e3-071255366614

Moretti, S. (2015) Variations on a Higgs theme. Physical Review D, 91, [014012]. (doi:10.1103/PhysRevD.91.014012).

Record type: Article

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.

Full text not available from this repository.

More information

Published date: 12 January 2015
Additional Information: 18 pages, 1 table, 4 figures
Keywords: hep-ph
Organisations: Theory Group

Identifiers

Local EPrints ID: 411746
URI: http://eprints.soton.ac.uk/id/eprint/411746
ISSN: 1550-7998
PURE UUID: 945f69b3-ef69-4aa4-99b0-72a898b1055a

Catalogue record

Date deposited: 23 Jun 2017 16:31
Last modified: 13 Mar 2019 19:43

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