Top quark anomalous tensor couplings in the two-Higgs-doublet models
| Autor: | Lucía Duarte, J. Vidal, Gabriel A. González-Sprinberg |
|---|---|
| Přispěvatelé: | Ministerio de Ciencia e Innovación (España), Generalitat Valenciana, Duarte Lucía, Universidad de la República (Uruguay). Facultad de Ingeniería, González-Sprinberg Gabriel A., Universidad de la República (Uruguay). Facultad de Ciencias, Vidal Jordi, Universitat de València (España) |
| Rok vydání: | 2013 |
| Předmět: |
Coupling
Physics Nuclear and High Energy Physics Particle physics Top quark Standard Model Large Hadron Collider Physics beyond the Standard Model High Energy Physics::Phenomenology Electroweak interaction Física FOS: Physical sciences Higgs sector High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) Beyond Standard Model Higgs boson CP violation |
| Zdroj: | Duarte, Lucía González Sprinberg, Gabriel A. Vidal Perona, Jorge 2013 Top quark anomalous tensor couplings in the two-Higgs-doublet models Journal of High Energy Physics 2013 11 114 RODERIC. Repositorio Institucional de la Universitat de Valéncia instname Digital.CSIC. Repositorio Institucional del CSIC COLIBRI Universidad de la República instacron:Universidad de la República |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/jhep11(2013)114 |
| Popis: | We compute the one loop right and left anomalous tensor couplings (g(R) and g(L), respectively) for the top quark, in the aligned two-Higgs-doublet model. They are the magnetic-like couplings in the most general parameterization of the tbW vertex. We find that the aligned two-Higgs doublet model, that includes as particular cases some of the most studied extensions of the Higgs sector, introduces new electroweak contribution's and provides theoretical predictions that are very sensitive to both new scalar masses and the neutral scalar mixing angle. For a largo area in the parameters space we obtain significant deviations in both the real and the imaginary parts of the couplings gR and gL, compared to the predictions given by the electroweak sector of the Standard Model. The most important ones are those involving the imaginary part of the left coupling g(L) and the real part of the right coupling gR. The real part of g(L), and the imaginary part of gR also show an important sensitivity to new physics scenarios. The model can also account for new CP violation effects via the introduction of complex alignment parameters that have important consequences on the values for the imaginary parts of the couplings. The top anomalous tensor couplings will be measured at the LHC and at future colliders providing a complementary insight on new physics, independent from the bounds in top decays coming from B physics and b -> s gamma. This work has been supported, in part, by the Ministerio de Ciencia e Innovacion, Spain, under grants FPA2011-23897 and FPA2011-23596; by Generalitat Valenciana, Spain, under grant PROMEEO/2009/128; and by Pedeciba, CSIC, and ANII under grant BE-POS-2010-2260 and PR-FCE-2009-1-2986, Uruguay. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink