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A Study of CP-Violation In The Higgs Sector Of Supersymmetric Models

Final Activity Report Summary - CPVHIGGSNMSXTRAD (A Study of CP-Violation In The Higgs Sector Of Supersymmetric Models)

The main objective of the project was the study of Higgs sector in the Minimal as well as Non-Minimal Supersymmetric Standard Model (MSSM as well as NMSSM) with definite signatures that will distinguish the CP-violating case from the CP-conserving one and could be experimentally probed at the forthcoming Large Hadron Collider (LHC). In this regard, we have been able to establish the importance of the di-photon decay of a light Higgs of mass within the range from about 80 GeV to about 130 GeV.

Within a scenario where the particle masses are measured elsewhere, we have established that this process is capable of probing CP-violating H1-stop-stop couplings and one is able to disentangle its contribution from that of the Standard Model contribution. Further, our preliminary analyses of the gluon-fusion Higgs production channel at the LHC along with its di-photon decay shows that for at least some regions of the parameter space CP-violating effects in production, propagation and decay combined can give a highly enhanced or suppressed event rate with respect to the CP-conserving case.