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Lee-Wick theories at high temperature

Fornal, Bartosz and Grinstein, Benjamín and Wise, Mark B. (2009) Lee-Wick theories at high temperature. Physics Letters B, 674 (4-5). pp. 330-335. ISSN 0370-2693.

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An extension of the standard model, the Lee–Wick standard model, based on ideas of Lee and Wick was recently introduced. It does not contain quadratic divergences in the Higgs mass and hence solves the hierarchy puzzle. The Lee–Wick standard model contains new heavy Lee–Wick resonances at the TeV scale that decay to ordinary particles. In this Letter we examine the behavior of Lee–Wick resonances at high temperature. We argue that they contribute negatively to the energy density ρ and pressure p and at temperatures much greater than their mass M their O(T^4) contributions to ρ and p cancel against those of the ordinary (light) particles. The remaining O(M2T^2) contributions are positive and result in an equation of state that approaches w = 1 from below as T → ∞.

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Additional Information:© 2009 Elsevier. Received 26 February 2009. Received in revised form 20 March 2009. Accepted 23 March 2009. Available online 25 March 2009. Editor: G.F. Giudice. The work of B.G. and M.B.W. was supported in part by the US Department of Energy under contracts DE-FG03-97ER40546 and DE-FG03-92ER40701, respectively. The work of B.F. was supported by the Henry and Grazyna A. Bauer Fellowship.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-97ER40546
Department of Energy (DOE)DE-FG03-92ER40701
Henry and Grazyna A. Bauer Fellowship, CaltechUNSPECIFIED
Subject Keywords:Lee-Wick; S-matrix; Equation of state; Speed of sound
Issue or Number:4-5
Classification Code:PACS: 12.60.-i, 12.90.+b.
Record Number:CaltechAUTHORS:20090810-082606892
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:14912
Deposited By: Tony Diaz
Deposited On:10 Aug 2009 15:59
Last Modified:03 Oct 2019 00:53

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