Resonance-continuum interference in the di-photon Higgs signal at the LHC

Technical Report · Tue Feb 25 00:00:00 EST 2003

DOI:https://doi.org/10.2172/812641· OSTI ID:812641

Dixon, Lance ^[1]

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1. SLAC

A low mass Standard Model Higgs boson should be visible at the Large Hadron Collider through its production via gluon-gluon fusion and its decay to two photons. We compute the interference of this resonant process, gg {yields} H {yields} {gamma}{gamma}, with the continuum QCD background, gg {yields} {gamma}{gamma} induced by quark loops. Helicity selection rules suppress the effect, which is dominantly due to the imaginary part of the two-loop gg {yields} {gamma}{gamma} scattering amplitude. The interference is destructive, but only of order 5% in the Standard Model, which is still below the 10-20% present accuracy of the total cross section prediction. We comment on the potential size of such effects in other Higgs models.

• Research Organization: Stanford Linear Accelerator Center, Menlo Park, CA (US)
• Sponsoring Organization: USDOE Office of Science (US)
• DOE Contract Number: AC03-76SF00515
• OSTI ID: 812641
• Report Number(s): SLAC-PUB-9654
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
HELICITY
HIGGS BOSONS
HIGGS MODEL
LINEAR COLLIDERS
QUANTUM CHROMODYNAMICS
QUARKS
SCATTERING AMPLITUDES
SELECTION RULES
STANDARD MODEL
TOTAL CROSS SECTIONS