Supersymmetric CP violating currents and electroweak baryogenesis
By M. Carena, J. Moreno, M. Quirós, M. Seco, C. Wagner. 2000
141 citations recorded by the source corpus.
In this work we compute the CP-violating currents of the right-handed stops and higgsinos, induced by the presence of non-trivial vacuum expectation values of the Higgs fields within the context of the minimal supersymmetric extension of the Standard Model (MSSM) with explicit CP-violating phases. Using the Keldysh formalism, we perform the computation of the currents at finite temperature, in an expansion of derivatives of the Higgs fields. Contrary to previous works, we implement a resummation of the Higgs mass insertion effects to all orders in perturbation theory. While the components of the right-handed stop current jμtR become proportional to the difference H2∂μH1−H1∂μH2 (suppressed by Δβ), the higgsino currents, jμHi, present contributions proportional to both H2∂μH1±H1∂μH2. For large values of the charged Higgs mass and moderate values of tanβ the contribution to the source proportional to H2∂μH1+H1∂μH2 in the diffusion equations become sizeable, although it is suppressed by the higgsino number violating interaction rate Γμ−1/2. For small values of the wall velocity, 0.04≲vω≲0.1, the total contribution leads to acceptable values of the baryon asymmetry for values of the CP-violating phases ϕCP in the range 0.04≲|sinϕCP|≲1. Finally, we comment on the relevance of the latest results of Higgs searches at LEP2 for the mechanism of electroweak baryogenesis within the MSSM.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/6aa4dfacab9fffe54f222b5f9739763e656bd97b
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Citations in the corpus
- Transport equations for chiral fermions to order \hbar and electroweak baryogenesis: Part I (2003, methodology): “Mostly in order to incorporate the possibility of fermionic mixing, the spontaneous baryogenesis mechanism was subsequently developed by several groups, which adopted the idea to baryogenesis studies mediated by the stops and charginos of the MSSM [46, 47, 48, 49, 50, 51] and NMSSM [31].”
- Baryogenesis in the Two-Higgs Doublet Model (2006, background): “In supersymmetric theories, for example, a strong first-order PT can occur if the superpartner of the top quark is lighter than about 175 GeV [8], and the baryon asymmetry can be generated by chargino transport [9, 10].”
- Electric Dipole Moments in the MSSM Reloaded (2008, unknown): “Not only do these two effects turn out to be significant for the existing one- and two-loop EDMs, but also they give rise to additional higher-order contributions within the MSSM, such as the original Weinberg operator induced by t and b quarks with Higgs bosons in the loop.”
- TRANSPORT EQUATIONS FOR CHIRAL FERMIONS TO ORDER ħ AND ELECTROWEAK BARYOGENESIS (2004, background): “[21] S.J. Huber, P. John and M.G. Schmidt “Bubble walls, CP violation and electroweak baryogenesis in the MSSM,” Eur.”