Vertex Displacements for Acausal Particles: Testing the Lee-Wick Standard Model at the LHC

Details Vertex Displacements for Acausal Particles: Testing the Lee-Wick Standard Model at the LHC Vertex Displacements for Acausal Particles: Testing the Lee-Wick Standard Model at the LHC

2009-08-17

arxiv.org/abs/0908.2446v2

JHEP 0910:023,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 7 figures, minor changes, published version

Scientific paper

10.1088/1126-6708/2009/10/023

We propose to search for wrong displaced vertices, where decay products of the secondary vertex move towards the primary vertex instead of away from it, as a signature for microscopic violation of causality. We analyze in detail the leptonic sector of the recently proposed Lee-Wick Standard Model, which provides a well motivated framework to study acausal effects. We find that, assuming Minimal Flavor Violation, the Lee-Wick partners of the electron, {\tilde l}^e and \tilde e, can produce measurable wrong vertices at the LHC, the most promising channel being q \bar{q} --> \bar{\tilde l}^e {\tilde l}^e --> e^+ e^- jjjj. A Monte-Carlo simulation using MadGraph/MadEvent suggests that for M_l < 450 GeV the measurement of these acausal vertex displacements should be accessible in the LHC era.

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