Virtual gravitons and brane field scattering in the RS model with a small curvature
نویسنده
چکیده
The contribution of virtual s-channel Kaluza-Klein (KK) gravitons to high energy scattering of the SM fields in the Randall-Sundrum (RS) model with two branes is studied. The small curvature option of the RS model is considered in which the KK gravitons are narrow low-mass spin-2 resonances. The analytical tree-level expression for a process-independent gravity part of the scattering amplitude is derived, accounting for nonzero graviton widths. It is shown that one cannot get a correct result, if a series of graviton resonances is replaced by a continuous mass distribution, in spite of the small graviton mass splitting. Such a replacement appeared to be justified only in the trans-Planckian energy region. PACS : 04.50.+h
منابع مشابه
RS model with the small curvature and Bhabha scattering at the ILC
The Randall-Sundrum (RS) model with the small curvature is studied. In such a scheme the mass spectrum of Kaluza-Klein (KK) gravitons is similar to that in a model with one extra flat dimension. The gravity effects in the Bhabha scattering at the energy 1 TeV are estimated. The calculations are based on the analytical formula which describes virtual graviton contributions. It takes into account...
متن کاملBrane Localized Curvature for Warped Gravitons
We study the effects of including brane localized curvature terms in the Randall-Sundrum (RS) model of the hierarchy. This leads to the existence of brane localized kinetic terms for the graviton. Such terms can be induced by brane and bulk quantum effects as well as Higgs-curvature mixing on the brane. We derive the modified spectrum of Kaluza-Klein (KK) gravitons and their couplings to 4-dime...
متن کاملRS model with a small curvature and gravity effects in e+e− annihilation into leptons at the LC
The Randall-Sundrum (RS) model with a small curvature is considered. The mass spectrum of Kaluza-Klein (KK) gravitons in such a scheme is similar (although not equivalent) to that in a model with one extra dimension in a flat metric. The gravity effects in the processes e+e− → e+e− and e+e− → μ+μ− at the collision energy 1 TeV are presented. Our calculations are based on the previously obtained...
متن کاملRS model with a small curvature and two-photon production at the LHC
The p⊥-distribution for the diphoton production at the LHC is calculated in the modified Randall-Sundrum model with a small curvature of the space-time κ, and 5-dimensional Planck scale M5 in the TeV region. The discovery limits on M5 are obtained to be 9.4 TeV and 11.6 TeV for the integrated luminosities 30 fb−1 and 100 fb−1, respectively. These limits do not depend on κ provided it is much sm...
متن کاملAssociated production of a Kaluza-Klein excitation of a gluon with a tt̄ pair at the LHC
In Randall-Sundrum models, the Kaluza-Klein (KK) excitations of the gluon, gKK have enhanced couplings to the right-handed quarks. In the absence of a gggKK coupling in these models, the single production of a gKK from an initial gg state is not possible. The search for other production mechanisms at the LHC, therefore, becomes important. We suggest that the associated production of a gKK with ...
متن کامل