Pair production of color-octet scalars at the LHC
Abstract
Heavy colored scalar particles, which exist in many models of new physics, can be
pair produced at the LHC via gluon-gluon fusion and possibly form quarkoniumlike bound
states. If the scalars are also charged under the electroweak gauge group, these bound
states can then decay into electroweak bosons. This yields a resonant cross section
for final states such as γγ that can exceed standard model backgrounds. This paper
studies this process in the Manohar-Wise model of color-octet scalars (COS). Important
threshold logarithms and final state Coulomb-like QCD interactions are resummed using
effective field theory. We compute the resummed cross section for gluon-gluon fusion
to COS pairs at the LHC as well as the resonant cross section for octetonium decaying
to γγ. The latter cross section exceeds the standard model diphoton cross section
when the COS mass is less than 500 (350) GeV for √s=14(7)TeV. Nonobservation of resonances
below these energies can significantly improve existing bounds on COS masses. © 2010
The American Physical Society.
Type
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https://hdl.handle.net/10161/4280Published Version (Please cite this version)
10.1103/PhysRevD.82.075017Publication Info
Idilbi, A; Kim, C; & Mehen, T (2010). Pair production of color-octet scalars at the LHC. Physical Review D - Particles, Fields, Gravitation and Cosmology, 82(7). pp. 75017. 10.1103/PhysRevD.82.075017. Retrieved from https://hdl.handle.net/10161/4280.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
Thomas C. Mehen
Professor of Physics
Prof.~Thomas Mehen works primarily on Quantum Chromodynamics (QCD) and the application
of effective field theory (EFT) to problems in hadronic physics. EFTs rely on three
key ideas: i) identifying the relevant degrees of freedom for a specific physical
process; ii) using symmetries of QCD to simplify or constrain the form of interactions;
and iii) finding small parameters, either small coupling constants or ratios of disparate
mass scales, which can be used to formulate systematic perturbativ

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