Lorentz-violating effects on pair production of W bosons in photon collisions

Abstract

We examine Lorentz-violating effects that could appear through deviations of the Standard Model gauge couplings WWgamma and WWgammagamma. These new physics effects are explored on the gamma gamma -> WW reaction at the International Linear Collider. In particular, the associated helicity amplitudes are computed in the context of the Standard Model Extension (which is a model-independent approach to CPT and Lorentz violation) and the Effective Lagrangian Model (which incorporates new physics effects that respect CPT and Lorentz violation). We perform an exhaustive study of the polarized differential cross sections to stand out effects related to Lorentz symmetry violation, where it is evidenced that the effects of Lorentz symmetry violation are more sensitive to the presence of the b constant background field. We found that for the $(\pm ,\pm ,(L,T+T,L))$ polarization state, only Standard Model Extension and Effective Lagrangian Model contribute at the lowest order, however, both types of new physics effects are clearly distinguished, being dominant the convoluted cross section of the Standard Model Extension in around 4 orders of magnitude. For this polarization state, at the last stage of operation of International Linear Collider, it is expected an integrated luminosity of 10^3 fb^{-1}, finding around of 2 events for a Lorentz-violating energy scale of 32 TeV.

25 pages and 23 figures. arXiv admin note: substantial text overlap with arXiv:1305.4265

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• The International Linear Collider
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• Bound on Noncommutative Standard Model with Hybrid Gauge Transformation via Lepton Flavor Conserving $Z$ Decay
• Trilinear gauge boson couplings in the standard model with one universal extra dimension
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• Constraining CPT-odd nonminimal interactions in the Electroweak sector
• One-loop structure of the photon propagator in the Standard Model Extension
• Constraining dimension-six nonminimal Lorentz-violating electron-nucleon interactions with EDM physics
• Lorentz violation parameters and noncommutative scale
• Breaking of Lorentz Invariance in Electron-Proton Parity Violation
• Effects of Lorentz violation in the Higgs sector of the Minimal Standard Model Extension
• Vacuum polarization in Yang-Mills theories with Lorentz violation
• CPT-Odd effects on the electromagnetic properties of charged leptons in the Standard Model Extension
• Constraining EDM and MDM lepton dimension five interactions in the electroweak sector