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Evading death by vacuum · Around

2012

Evading death by vacuum

Barroso, A., Ferreira, P. M., Ivanov, I. P. et al.

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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 preclude panic vacuum solutions.

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For recent results, see G. Aad et al
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G. Degrassi, S. Di Vita, J. Elias-Miro, J. R. Espinosa, G. F. Giudice, G. Isidori and A. Strumia, JHEP 1208
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For a recent review on the 2HDM, see, for example, G.C. Branco, P.M. Ferreira, L. Lavoura, M.N. Rebelo, M. Sher and J.P. Silva, Phys. Rept. 516
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F. Mahmoudi, talk given at Prospects For Charged Higgs Discovery At Colliders (CHARGED 2012), 8-11 October, Uppsala, Sweden
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A. Barroso, P. M. Ferreira I. P. Ivanov and R. Santos, to be published

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M. Baak, M. Goebel, J. Haller, A. Hoecker, D. Kennedy, R. Kogler, K. Moenig, M. Schott and J. Stelzer, arXiv:1209.2716 [hep-ph]

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See Fig. 12 in ATLAS’ article in Ref. cms_atlas

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M. Carena, S. Gori, I. Low, N. R. Shah and C. E. M. Wagner, arXiv:1211.6136 [hep-ph]

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M. Baak, M. Goebel, J. Haller, A. Hoecker, D. Ludwig, K. Moenig, M. Schott and J. Stelzer, Eur. Phys. J. C 72

2012

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We use the averages put forth in A. Arbey, M. Battaglia, A. Djouadi, F. Mahmoudi, arXiv:1211.4004, updated from ibid

2012

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