Graviton production by two photon and electron-photon processes in Kaluza-Klein theories with large extra dimensions
- Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
- Department of Physics, University of California, Riverside, California 92521 (United States)
- Theory Group, Brookhaven National Laboratory, Upton, New York 11973 (United States)
We consider the production of gravitons via two photon and electron-photon fusion in Kaluza-Klein theories which allow TeV scale gravitational interactions. We show that at electron-positron colliders, the processes l{sup +}l{sup -}{yields}l{sup +}l{sup -}+graviton, with l=e, {mu}, can lead to a new signal of low energy gravity of the form l{sup +}l{sup -}{yields}l{sup +}l{sup -}+missing energy which is well above the standard model background. For example, with two extra dimensions, at the Next Linear Collider with a center of mass energy of 500 or 1000 GeV, hundreds to thousands such l{sup +}l{sup -}+graviton events may be produced if the scale of the gravitational interactions, M{sub D}, is around a few TeV. At a gamma-electron collider, more stringent bounds may be placed on M{sub D} via the related reaction e{sup -}{gamma}{yields}e{sup -}G. For instance, if a 1 TeV e{sup +}e{sup -} collider is converted to an electron-photon collider, a bound of {approx}10(14) TeV may be placed on the scale M{sub D} if the number of extra dimensions {delta}=2, while a bound of {approx}4(5) TeV may be placed if {delta}=4, with unpolarized (right polarized) electron beams. (c) 2000 The American Physical Society.
- OSTI ID:
- 20216481
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 61, Issue 11; Other Information: PBD: 1 Jun 2000; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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