Artículo
Álvarez, E.; Schat, C.; Da Rold, L.; Szynkman, A. "Electroweak precision constraints on the Lee-Wick standard model" (2008) Journal of High Energy Physics. 2008(4)
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Abstract:
We perform an analysis of the electroweak precision observables in the Lee-Wick Standard Model. The most stringent restrictions come from the S and T parameters that receive important tree level and one loop contributions. In general the model predicts a large positive S and a negative T. To reproduce the electroweak data, if all the Lee-Wick masses are of the same order, the Lee-Wick scale is of order 5 TeV. We show that it is possible to find some regions in the parameter space with a fermionic state as light as 2.4-3.5 TeV, at the price of rising all the other masses to be larger than 5-8 TeV. To obtain a light Higgs with such heavy resonances a fine-tuning of order a few per cent, at least, is needed. We also propose a simple extension of the model including a fourth generation of Standard Model fermions with their Lee-Wick partners. We show that in this case it is possible to pass the electroweak constraints with Lee-Wick fermionic masses of order 0.4-1.5 TeV and Lee-Wick gauge masses of order 3 TeV.
Registro:
| Documento: | Artículo |
| Título: | Electroweak precision constraints on the Lee-Wick standard model |
| Autor: | Álvarez, E.; Schat, C.; Da Rold, L.; Szynkman, A. |
| Filiación: | CONICET, Departamento de Física, Pab.1, (1428) Buenos Aires, Argentina Instituto de Física, Universidade de São Paulo, Rua do Matão 187, São Paulo, SP 05508-900, Brazil Physique des Particules, Université de Montréal, succ. centre-ville, Montréal, QC H3C 3J7, Canada |
| Palabras clave: | Beyond standard model; Higgs physics; Quark masses and SM parameters; Standard model |
| Año: | 2008 |
| Volumen: | 2008 |
| Número: | 4 |
| DOI: | http://dx.doi.org/10.1088/1126-6708/2008/04/026 |
| Título revista: | Journal of High Energy Physics |
| Título revista abreviado: | J. High Energy Phys. |
| ISSN: | 11266708 |
| PDF: | https://bibliotecadigital.exactas.uba.ar/download/paper/paper_11266708_v2008_n4_p_Alvarez.pdf |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_11266708_v2008_n4_p_Alvarez |
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Citas:
---------- APA ----------
Álvarez, E., Schat, C., Da Rold, L. & Szynkman, A. (2008) . Electroweak precision constraints on the Lee-Wick standard model. Journal of High Energy Physics, 2008(4).http://dx.doi.org/10.1088/1126-6708/2008/04/026
---------- CHICAGO ----------
Álvarez, E., Schat, C., Da Rold, L., Szynkman, A. "Electroweak precision constraints on the Lee-Wick standard model" . Journal of High Energy Physics 2008, no. 4 (2008).http://dx.doi.org/10.1088/1126-6708/2008/04/026
---------- MLA ----------
Álvarez, E., Schat, C., Da Rold, L., Szynkman, A. "Electroweak precision constraints on the Lee-Wick standard model" . Journal of High Energy Physics, vol. 2008, no. 4, 2008.http://dx.doi.org/10.1088/1126-6708/2008/04/026
---------- VANCOUVER ----------
Álvarez, E., Schat, C., Da Rold, L., Szynkman, A. Electroweak precision constraints on the Lee-Wick standard model. J. High Energy Phys. 2008;2008(4).http://dx.doi.org/10.1088/1126-6708/2008/04/026
