Prospects for observing the Kaluza-Klein excitations of the W boson in the ATLAS detector at the LHCG. Polesello and M. Prata
INFN, Sezione di Pavia, Dipartimento di Fisica Nucleare e Teorica, Universitá di Pavia, Via Bassi 6, Pavia, Italy
(Received 9 September 2003 / Published online 17 December 2003)
Kaluza-Klein excitations of the gauge bosons are a notable feature of theories with "small" (~ 1 TeV) extra dimensions. The leptonic decays of the excitations of the W boson provide at the LHC the striking signature of events containing an isolated high PT lepton accompanied by a high transverse momentum imbalance.
We investigate the reach for these signatures through a parametrized simulation of the ATLAS detector. With an integrated luminosity of 100 fb-1 a peak in the transverse invariant mass of the lepton-neutrino system will be detected if the compactification scale (Mc) is below 6 TeV. If no signal is observed, with an integrated luminosity of 100 fb-1 a limit of Mc>11.7 TeV can be obtained from the study of the lepton-neutrino transverse mass distribution below the peak. If a peak is detected, a measurement of the couplings of the boson to leptons and quarks can be performed for Mc up to ~5 TeV.
PACS: 11.10Kk - 11.25Mj - 13.85-t
© Società Italiana di Fisica, Springer-Verlag 2004