Warped gravitons at the CERN LHC and beyond

被引:183
作者
Agashe, Kaustubh [1 ]
Davoudiasl, Hooman
Perez, Gilad
Soni, Amarjit
机构
[1] Syracuse Univ, Dept Phys, Syracuse, NY 13244 USA
[2] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA
[3] Brookhaven Natl Lab, Upton, NY 11973 USA
来源
PHYSICAL REVIEW D | 2007年 / 76卷 / 03期
关键词
D O I
10.1103/PhysRevD.76.036006
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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 q(q)over-bar 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(-1) (SLHC with 3 ab(-1)) of a KK graviton with a mass up to similar to 2 (similar to 3) TeV for the ratio of the AdS(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 similar to 4 TeV, as favored by the electroweak and flavor precision tests in the simplest such models.
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页数:9
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