Tau lepton charge asymmetry and new physics at the LHC

Abstract

We consider the possibility of studying new physics that singles out the tau-lepton at the LHC. We concentrate on the tau-lepton charge asymmetry in tau+tau- pair production as a tool to probe this physics beyond the Standard Model. We consider two generic scenarios for the new physics. We first study a non-universal Z' boson as an example of a new resonance that can single out tau-leptons. We then consider vector lepto-quarks coupling of the first generation quarks with the third generation leptons as an example of non-resonant new physics. We find that in both cases the charge asymmetry can be sufficiently sensitive to the new physics to provide useful constraints at the LHC.

16 LaTex Pages, 21 EPS Figures, 6 Tables (Extended to incorporate tau-decay level analysis. A few references have also been added.)

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Cited by in corpus (4)

• Neutral Gauge Boson Contributions to the Dimuon Charge Asymmetry in B Decays
• Constraining $\tau$-lepton dipole moments and gluon couplings at the LHC
• Spin correlations and new physics in $\tau$-lepton decays at the LHC
• Probing new physics with tau-leptons at the LHC