Disentangling between Z' and Z* with first LHC data

Details Disentangling between Z' and Z* with first LHC data Disentangling between Z' and Z* with first LHC data

2008-07-31

arxiv.org/abs/0807.5087v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 6 figures, talk prepared for the workshop "Physics Beyond the Standard Model at the LHC", Sao Paulo, Brazil, May 29-

Scientific paper

The resonance production of new chiral spin-1 excited bosons, Z*, and their detection through the Drell-Yan process in the first physical runs at the CERN LHC are considered. The new neutral chiral bosons can be observed as a Breit-Wigner resonance peaks in the invariant dilepton mass distribution in the same way as the well-known hypothetical gauge bosons, Z'. However, unique new signatures of the chiral bosons exist. These signatures could be very important for the interpretation of the first LHC data. First, there is no Jacobian peak in the lepton transverse momentum distribution at the kinematical endpoint of the new resonance. Second, the lepton angular distribution in the Collins-Soper frame for the high on-peak invariant masses of the lepton pairs has a peculiar "swallowtail" shape.

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