The 750 GeV threshold to a new particle world
The 750 GeV threshold to a new particle world
We show how an excess in the diphoton channel can be the effect of neither a resonance nor an end-point in a cascade decay, but rather of a threshold for virtual production of a pair of extra quarks, each with half of peak invariant mass, onsetting in both the $gg$-initiated production and the $\gamma\gamma$-induced decay of an off-shell $Z$ boson. For our analysis we consider as paradigmatic example the 750 GeV excess previously seen at the end of 2015 with the Run 2 data of the LHC but not confirmed with 2016 data.
hep-ph
Jain, Samarth
b3ad4f75-af90-44e5-aad7-ca275c341253
Margaroli, Fabrizio
40e65b48-0be9-45e0-b691-a33e27f797cf
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Panizzi, Luca
e8ade38e-ee5d-4e2d-8307-3286a8b92740
31 January 2017
Jain, Samarth
b3ad4f75-af90-44e5-aad7-ca275c341253
Margaroli, Fabrizio
40e65b48-0be9-45e0-b691-a33e27f797cf
Moretti, Stefano
b57cf0f0-4bc3-4e02-96e3-071255366614
Panizzi, Luca
e8ade38e-ee5d-4e2d-8307-3286a8b92740
Jain, Samarth, Margaroli, Fabrizio, Moretti, Stefano and Panizzi, Luca
(2017)
The 750 GeV threshold to a new particle world.
Physical Review D, 95 (1), [014037].
(doi:10.1103/PhysRevD.95.014037).
Abstract
We show how an excess in the diphoton channel can be the effect of neither a resonance nor an end-point in a cascade decay, but rather of a threshold for virtual production of a pair of extra quarks, each with half of peak invariant mass, onsetting in both the $gg$-initiated production and the $\gamma\gamma$-induced decay of an off-shell $Z$ boson. For our analysis we consider as paradigmatic example the 750 GeV excess previously seen at the end of 2015 with the Run 2 data of the LHC but not confirmed with 2016 data.
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Accepted/In Press date: 16 June 2016
e-pub ahead of print date: 31 January 2017
Published date: 31 January 2017
Additional Information:
6 pages, 5 figures, 2 tables, version accepted by PRD
Keywords:
hep-ph
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Theory Group
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Local EPrints ID: 411791
URI: http://eprints.soton.ac.uk/id/eprint/411791
ISSN: 2470-0010
PURE UUID: 2025973e-2529-4cb4-a952-f3353ab53658
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Date deposited: 26 Jun 2017 16:30
Last modified: 16 Mar 2024 03:34
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Contributors
Author:
Samarth Jain
Author:
Fabrizio Margaroli
Author:
Luca Panizzi
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