Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-05-21
Nucl.Phys. B639 (2002) 263-280; Erratum-ibid. B647 (2002) 359-360
Physics
High Energy Physics
High Energy Physics - Phenomenology
Eqs. (9) and (25) corrected and numerical analysis modified accordingly
Scientific paper
10.1016/S0550-3213(02)00542-4
Supersymmetric loop contributions can lead to different decay rates of H+\to t\bar b and H-\to b\bar t. We calculate the decay rate asymmetry \delta^CP = \frac{\Gamma(H+\to t\bar b)-\Gamma(H-\to b\bar t)}{{\Gamma(H+\to t\bar b)+\Gamma(H-\to b\bar t)} at next-to-leading order in the MSSM with complex parameters. We analyse the parameter dependence of \delta^CP with emphasis on the phases of A_t and A_b. It turns out that the most important contribution comes from the loop with stop, sbottom, and gluino. If this contribution is present, \delta^CP can go up to 10-15% for tan(beta)~10, and to ~5% for large values of tan(beta).
Christova Ekaterina
Eberl Helmut
Kraml Sabine
Majerotto Walter
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