Warped gravitons at the CERN LHC and beyond

Journal Article · Wed Aug 01 04:00:00 EDT 2007 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.76.036006· OSTI ID:21027537

Agashe, Kaustubh ^[1]; Davoudiasl, Hooman; Soni, Amarjit ^[2]; Perez, Gilad ^[3]

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1. Department of Physics, Syracuse University, Syracuse, New York 13244 (United States)
2. Brookhaven National Laboratory, Upton, New York 11973 (United States)
3. C. N. Yang Institute for Theoretical Physics, State University of New York, Stony Brook, New York 11794-3840 (United States)

We study the production and decay of Kaluza-Klein (KK) gravitons at the CERN Large Hadron Collider (LHC), in the framework of a warped extra dimension in which the standard model (SM) fields propagate. Such a scenario can provide solutions to both the Planck-weak hierarchy problem and the flavor puzzle of the SM. In this scenario, the production via qq annihilation and decays to the conventional photon and lepton channels are highly suppressed. However, we show that graviton production via gluon fusion followed by decay to longitudinal Z/W can be significant; vector boson fusion is found to be a subdominant production mode. In particular, the golden ZZ decay mode offers a distinctive 4-lepton signal that could lead to the observation at the LHC with 300 fb{sup -1} (SLHC with 3 ab{sup -1}) of a KK graviton with a mass up to {approx}2 ({approx}3) TeV for the ratio of the AdS{sub 5} curvature to the Planck scale modestly above unity. We argue that (contrary to the lore) such a size of the curvature scale can still be within the regime of validity of the framework. Upgrades beyond the SLHC luminosity are required to discover gravitons heavier than {approx}4 TeV, as favored by the electroweak and flavor precision tests in the simplest such models.

• OSTI ID: 21027537
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 76; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
CERN LHC
FLAVOR MODEL
GLUONS
GRAVITONS
KALUZA-KLEIN THEORY
LEPTONS
MATHEMATICAL SOLUTIONS
PARTICLE DECAY
PARTICLE PRODUCTION
PHOTONS
REST MASS
STANDARD MODEL
TEV RANGE