Diphoton Signals for Large Extra Dimensions at the Tevatron and CERN LHC

Details Diphoton Signals for Large Extra Dimensions at the Tevatron and CERN LHC Diphoton Signals for Large Extra Dimensions at the Tevatron and CERN LHC

1999-08-13

arxiv.org/abs/hep-ph/9908358v1

Phys.Rev. D61 (2000) 094007

Physics

High Energy Physics

High Energy Physics - Phenomenology

22 pages LaTex, 8 eps figures. Using axodraw.sty. To be submitted to Physical Review D

Scientific paper

10.1103/PhysRevD.61.094007

We analyze the potentiality of hadron colliders to search for large extra dimensions via the production of photon pairs. The virtual exchange of Kaluza--Klein gravitons can significantly enhance this processes provided the quantum gravity scale ($M_S$) is in the TeV range. We studied in detail the subprocesses $q \bar{q} \to \gamma \gamma$ and $g g \to \gamma \gamma$ taking into account the complete Standard Model and graviton contributions as well as the unitarity constraints. We show that the Tevatron Run II will be able to probe $M_S$ up to 1.5--1.9 TeV at 2$\sigma$ level, while the LHC can extend this search to 5.3--6.7 TeV, depending on the number of extra dimensions.

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