Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-04-07
Phys.Rev.D61:015005,2000
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, 5 figures
Scientific paper
10.1103/PhysRevD.61.015005
Gravity can become strong at the TeV scale in the theory of extra dimensions. An effective Lagrangian can be used to describe the gravitational interactions below a cut-off scale. In this work, we study the diphoton production in $\gamma\gamma$, $p\bar p$, and $e^+ e^-$ collisions in the model of low scale gravity. Since in the standard model photon-photon scattering only occurs via box diagrams, the cross section is highly suppressed. Thus, photon-photon scattering opens an interesting opportunity for studying the new gravity interaction, which allows tree-level photon couplings. In addition, we also examine the diphoton production at hadronic and $e^+ e^-$ colliders. We derive the limits on the cut-off scale from the available diphoton data and also estimate the sensitivity reach in Run II at the Tevaton and at the future linear $e^+ e^-$ colliders.
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