Gluon-initiated production of a Kaluza-Klein gluon in a Bulk Randall-Sundrum model B.C. Allanach, F. Mahmoudi, J.P. Skittrall, K. Sridhar In the Bulk Randall-Sundrum model, the Kaluza-Klein excitations of the gauge bosons are the primary signatures. In particular, the search for the Kaluza-Klein (KK) excitation of the gluon at hadron colliders is of great importance in testing this model. At the leading order in QCD, the production of this KK-gluon proceeds only via q qbar-initial states. We study the production of KK-gluons from gluon initial states at next-to-leading order in QCD. We find that, even after including the sub-dominant KK-gluon loops at this order, the next-to-leading order (NLO) cross-section is tiny compared to the leading order cross-section and unlikely to impact the searches for this resonance at hadron colliders. SPIRES
entry Published as JHEP 1003:014,2010 arXiv:0910.1350 (mirrors: aubrcndeesfrilinitjpkrrutwukzaapslanl)
Production of a Z boson and a photon
via a Randall-Sundrum-type graviton at the Large Hadron
Collider Jordan P. Skittrall Abstract: In extra dimensional models with Kaluza-Klein graviton states that are well separated in mass, such states may be observed as resonances in collider experiments. We extend previous works on such scenarios by considering the one-loop resonant production of a Z boson in association with a photon. We find the production rate to be negligible in conservative scenarios, and sufficiently small for observation to be very difficult even for reasonable luminosity in less conservative scenarios. SPIRES
entry Published as
Eur. Phys. J. C 60, 291-295 (2009) arXiv:0809.4383 (mirrors: aubrcndeesfrilinitjpkrrutwukzaapslanl) DAMTP-2008-87
Z boson decay to photon plus Kaluza-Klein
graviton: large extra dimensional bounds Benjamin C. Allanach and
Jordan P. Skittrall Abstract: We consider the phenomenology of
the decay of a Z boson into a photon and a Kaluza-Klein excitation of
the graviton in the ADD model. Using LEP data, we obtain an upper
bound on the branching ratio corresponding to this process of
~10-11. This bound would be useful for model discrimination in the
event of such a signal at a future collider. We also investigate
energy profiles of the process, showing that with sufficient data this
process could distinguish between numbers of extra dimensions in the
event of discovery of a toroidally-compactified ADD model. SPIRES
entry Published as
Eur. Phys. J. C 55, 107-112 (2008) arXiv:0709.2929 (mirrors: aubrcndeesfrilinitjpkrrutwukzaapslanl) DAMTP-2007-87
Z boson decay to photon plus Kaluza-Klein
graviton in large extra dimensions Benjamin C. Allanach,
Jordan P. Skittrall and K. Sridhar Abstract: In the large extra dimensional
ADD scenario, Z bosons undergo a one-loop decay into a photon and
Kaluza-Klein towers of gravitons/gravi-scalars. We calculate such
a decay width, extending previous arguments about the general form of
the four-dimensional on-shell amplitude. The amplitudes
calculated are relevant to processes in other extra dimensional models
where the Standard Model fields are confined to a 4-brane. SPIRES
entry Published as JHEP11(2007)089 arXiv:0705.1953 (mirrors: aubrcndeesfrilinitjpkrrutwukzaapslanl) DAMTP-2007-42 TIFR/TH/07-08
