Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-05-19
Phys.Lett. B461 (1999) 196-202
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, latex, 2 ps figures, numerical errors corrected which has improved the final results
Scientific paper
10.1016/S0370-2693(99)00847-3
Theories with large extra dimensions predict an infinite tower of Kaluza-Klein states in the 1 TeV range, which can consequently have significant implications for experimental observables. One such observable, which gets affected by the exchange of spin-2 Kaluza-Klein particles, is the t t(bar) production cross-section in photon-photon collisions at NLC energies. We study this process and obtain bounds on the effective quantum gravity scale M_S between 700 and 2400 GeV (depending on the centre-of-mass energy). We show that the use of polarisation will further strengthen these bounds.
Mathews Prakash
Poulose P.
Sridhar K.
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