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Flavor changing neutral currents in the Lee–Wick Standard Model

Dulaney, Timothy R. and Wise, Mark B. (2008) Flavor changing neutral currents in the Lee–Wick Standard Model. Physics Letters B, 658 (5). pp. 230-235. ISSN 0370-2693. doi:10.1016/j.physletb.2007.08.049.

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Recently an extension of the Standard Model (the Lee–Wick Standard Model) based on ideas of Lee and Wick (LW) was introduced. It does not contain quadratic divergences in the Higgs mass and hence solves the hierarchy puzzle. The LW Standard Model contains new heavy LW-resonances at the TeV scale that decay to ordinary particles. In this Letter we examine in more detail the flavor structure of the theory. We integrate out the heavy LW-fermions at tree level and find that this induces flavor changing Z-boson couplings. However, these flavor changing neutral currents are acceptably small since they are automatically suppressed by small Yukawa couplings. This is the case even though the theory does not satisfy the principle of minimal flavor violation. New couplings of the charged W-bosons to quarks and leptons are also induced. We also integrate out the LW–Higgs and examine the four-fermion operators induced.

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Additional Information:Author postprint. Dated: February 5, 2008. arXiv:07808.0567v2 [hep-ph] Published version Copyright © 2008 Elsevier B.V. Received 21 August 2007; accepted 25 August 2007. Available online 30 August 2007. We thank B. Grinstein for helpful comments on the derivation of Eq. (13). We also thank him and D. O'Connell for encouraging remarks on a preliminary version of this manuscript. This work was supported in part by DOE grant number DEFG03-92ER40701. Technical report CALT 68-2656
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Department of Energy (DOE)DE-FG03-92ER40701
Subject Keywords:Lee–Wick; Flavor changing neutral currents; Minimal flavor violation
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Issue or Number:5
Record Number:CaltechAUTHORS:DULplb08
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9663
Deposited By: Archive Administrator
Deposited On:25 Feb 2008
Last Modified:08 Nov 2021 21:01

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