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Titolo:
Supersymmetric CP-violating currents and electroweak baryogenesis
Autore:
Carena, M; Moreno, JM; Quiros, M; Seco, M; Wagner, CEM;
Indirizzi:
Fermi Natl Accelerator Lab, Batavia, IL 60510 USA Fermi Natl Accelerator Lab Batavia IL USA 60510 ab, Batavia, IL 60510 USA CSIC, Inst Estructura Mat, E-28006 Madrid, Spain CSIC Madrid Spain E-28006 IC, Inst Estructura Mat, E-28006 Madrid, Spain Argonne Natl Lab, Div High Energy Phys, Argonne, IL 60439 USA Argonne NatlLab Argonne IL USA 60439 Energy Phys, Argonne, IL 60439 USA Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA Univ Chicago Chicago IL USA 60637 nrico Fermi Inst, Chicago, IL 60637 USA
Titolo Testata:
NUCLEAR PHYSICS B
fascicolo: 1-2, volume: 599, anno: 2001,
pagine: 158 - 184
SICI:
0550-3213(20010402)599:1-2<158:SCCAEB>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
ELECTRIC-DIPOLE MOMENTS; LARGE-TAN-BETA; WEINBERG-SALAM THEORY; BUBBLE WALL PROFILES; MSSM HIGGS-BOSON; STANDARD MODEL; PHASE-TRANSITION; FINITE-TEMPERATURE; BARYON ASYMMETRY; DIMENSIONAL REDUCTION;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
107
Recensione:
Indirizzi per estratti:
Indirizzo: Carena, M Fermi Natl Accelerator Lab, POB 500, Batavia, IL 60510 USA FermiNatl Accelerator Lab POB 500 Batavia IL USA 60510 0510 USA
Citazione:
M. Carena et al., "Supersymmetric CP-violating currents and electroweak baryogenesis", NUCL PHYS B, 599(1-2), 2001, pp. 158-184

Abstract

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 supersymmetricextension 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. White the components of the right-handed stop current j((t) over tildeR)(mu) become proportional tothe difference H-2 a(mu) H-1 - H-1 a(mu) H-2 (suppressed by Delta beta), the higgsino currents, j((H) over tildel)(mu), proportional to both H(2)a(mu)H(1) +/- H-1 a(mu)H(2). For large values of the charged Higgs mass and moderate values of tan B the contribution to the source proportional to H(2)a(mu)H(1) + H(1)a(mu)H(2) in the diffusion equations become sizeable, although it is suppressed by the higgsino number violating interaction rate Gamma (-1/2)(mu). For small values of the wall velocity, 0.04 less than or equal to v(omega) less than or equal to 0.1, the total contribution leads to acceptable values of the baryon asymmetry for values of the CP-violating phasesphi (CP) in the range 0.04 less than or equal to | sin phi (CP)| less thanor equal to 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, (C) 2001 Elsevier Science B.V. All rights reserved.

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Documento generato il 12/07/20 alle ore 09:15:33