Tests of Low Scale Gravity via Gauge Boson Pair Production in $γ γ$ Collisions

Details Tests of Low Scale Gravity via Gauge Boson Pair Production in $γ γ$ Collisions Tests of Low Scale Gravity via Gauge Boson Pair Production in $γ γ$ Collisions

1999-04-18

arxiv.org/abs/hep-ph/9904380v2

Phys.Rev.D60:115010,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

28 pages, 8 figs, LaTex, references and text updated

Scientific paper

10.1103/PhysRevD.60.115010

Arkani-Hamed, Dimopoulos and Dvali have recently proposed that gravity may become strong at energies near 1 TeV thus removing the hierarchy problem. This scenario can be tested in several ways at present and future colliders. In this paper we examine the exchange of towers of Kaluza-Klein gravitons and their influence on the production of pairs of massive gauge bosons in $\gamma \gamma$ collisions. These tower exchanges are shown to lead to a new dimension-8 operator that can significant alter the Standard Model expectations for these processes. The role of polarization for both the initial state photons and the final state gauge bosons in improving sensitivity to graviton exchange is emphasized. We find that the discovery reach for graviton tower exchange in the $\gamma \gamma \to W^+W^-$ channel to be significantly greater than for any other process so far examined.

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