TAILIEUCHUNG - Báo cáo " Charge parity violation in the minimal supersymmetric standard model (MSSM) and some new interactions "

We present the appearance of some new interaction in the MSSM with CP violation. We give analytic formulae and perform an evaluation of the effects of these new interactions on some processes concerning the productions and decays of squarks. We find that these effects are typically of $ \% $ to $+3 \% $ depending on each process. | VNU Journal of Science Mathematics - Physics 25 2009 137-142 Charge parity violation in the minimal supersymmetric standard model MSSM and some new interactions Ha Huy Bang1 Nguyen Thi Thu Huong1 Nguyen Chinh Cuong2 Faculty of Physics College of Science VNU 334 Nguyen Trai Thanh Xuan Hanoi Vietnam 2 Faculty of Physics Hanoi University of Education 136 Xuan Thuy Cau Giay Hanoi Vietnam Received 6 July 2009 Abstract. We present the appearance of some new interaction in the MSSM with CP violation. We give analytic formulae and perform an evaluation of the effects of these new interactions on some processes concerning the productions and decays of squarks. We find that these effects are typically of to 3 depending on each process. Keyworks MSSM CP violation. 1. Introduction Test of the discrete symmetries charge conjugation c parity p and time-reversal T have played an important role in establishing the structure of standard Model SM . In particular CP violation has been observed in the electroweak sector of the SM in the K and B systems. It is linked to a single phase in the unitary Cabbibo-Kobayashi-Maskawa CKM matrix describing transitions between the three generations of quarks see . 1 for a detailed review. It is important to note that this source of CP violation is strictly flavour non-diagonal. The strong sector of the SM also allows for CP violation through a dimension-four term OGG which is of topological origin. Such a term would lead to flavour-diagonal CP violation and hence to electric dipole moments EDMs . The current experimental limits on the EDMs of atoms and neutrons 2-4 dTi 90 C .L. dHg 95 C .L. dn 90 C .L. however constrain the strong CP phase to ớ IO9 A comprehensive discussion of this issue can be found in 5 .While 0 appears to be extremly tuned the CKM contribution to the EDMs is several orders of magnitude below the experimntal bounds . d KM 10 3 .cm. Therefore while providing important constraints .

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