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Evading death by vacuum

  • Regular Article - Theoretical Physics
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Abstract

In the Standard Model, the Higgs potential allows only one minimum at tree level. But the open possibility that there might be two scalar doublets enriches the vacuum structure, allowing for the risk that we might now be in a metastable state, which we dub the panic vacuum. Current experiments at the LHC are probing the Higgs particle predicted as a result of the spontaneous symmetry breaking. Remarkably, in the two Higgs model with a softly broken U(1) symmetry, the LHC experiments already allow to exclude many panic vacuum solutions.

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Acknowledgements

The works of A.B., P.M.F. and R.S. are supported in part by the Portuguese Fundação para a Ciência e a Tecnologia (FCT) under contract PTDC/FIS/117951/2010, by FP7 Reintegration Grant, number PERG08-GA-2010-277025, and by PEst-OE/FIS/UI0618/2011. The work of J.P.S. is funded by FCT through the projects CERN/FP/109305/2009 and U777-Plurianual, and by the EU RTN project Marie Curie: PITN-GA-2009-237920.

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Authors and Affiliations

  1. Centro de Física Teórica e Computacional, Faculdade de Ciências, Universidade de Lisboa, Av. Prof. Gama Pinto 2, 1649-003, Lisboa, Portugal

    A. Barroso, P. M. Ferreira & Rui Santos

  2. Instituto Superior de Engenharia de Lisboa, 1959-007, Lisboa, Portugal

    P. M. Ferreira, Rui Santos & João P. Silva

  3. IFPA, Université de Liége, Allée du 6 Août 17, bâtiment B5a, 4000, Liége, Belgium

    I. P. Ivanov

  4. Sobolev Institute of Mathematics, Koptyug Avenue 4, 630090, Novosibirsk, Russia

    I. P. Ivanov

  5. Centro de Física Teórica de Partículas (CFTP), Instituto Superior Técnico, Universidade Técnica de Lisboa, 1049-001, Lisboa, Portugal

    João P. Silva

Authors
  1. A. Barroso
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  2. P. M. Ferreira
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  3. I. P. Ivanov
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  4. Rui Santos
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  5. João P. Silva
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Corresponding author

Correspondence to Rui Santos.

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Barroso, A., Ferreira, P.M., Ivanov, I.P. et al. Evading death by vacuum. Eur. Phys. J. C 73, 2537 (2013). https://doi.org/10.1140/epjc/s10052-013-2537-0

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  • DOI: https://doi.org/10.1140/epjc/s10052-013-2537-0

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