Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2002-06-04
Phys.Rev. D66 (2002) 016009
Physics
High Energy Physics
High Energy Physics - Phenomenology
1+13 pages, 3 eps figures
Scientific paper
10.1103/PhysRevD.66.016009
In most supersymmetric theories, charginos $\tilde{\chi}^\pm_{1,2}$ belong to the class of the lightest supersymmetric particles and the couplings of Higgs bosons to charginos are in general complex so that the CP--violating chargino contributions to the loop--induced coupling of the lightest Higgs boson to photon pairs can be sizable even in the decoupling limit of large pseudoscalar mass $m_A$ with only the lightest Higgs boson kinematically accessible at future high energy colliders. We introduce a specific benchmark scenario of CP violation consistent with the electric dipole moment constraints and with a commonly accepted baryogenesis mechanism in the minimal supersymmetric Standard Model. Based on the benchmark scenario of CP violation, we demonstrate that the fusion of the lightest Higgs boson in linearly polarized photon--photon collisions can allow us to confirm the existence of the CP--violating chargino contributions {\it even in the decoupling regime of the Higgs sector} for nearly degenerate SU(2) gaugino and higgsino mass parameters of about the electroweak scale.
Choi Yong-Sang
Chung Byungchul
Ko Pyungwon
Lee Jae Sik
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