Presentation on theme: "FSI Phases using CP Asymmetries from B Meson Decay Based on the work arXiv:1402:2978 Jihn E. Kim, Doh Young Mo, Soonkeon Nam Busan Particle Physics Workshop."— Presentation transcript:
FSI Phases using CP Asymmetries from B Meson Decay Based on the work arXiv:1402:2978 Jihn E. Kim, Doh Young Mo, Soonkeon Nam Busan Particle Physics Workshop
The Success of the CKM Physics All the measurements so far seem to be consistent with the Standard Model prediction. Flavor physics provides severe constraints on New Physics because Standard Model processes are in many cases suppressed and generated at loop levels. Precise prediction of the Standard Model, or extraction of the New Physics is quite complicated because we are dealing with mesons in both experiment and theory, which means we are in the non-perturbative regime.
Recent experiment on B physics R. Aaij et al., Phys. Rev. Lett. 110, 221601 (2013) [arXiv:1304.6173v2 [hep-ex]] First observation of CP violation in the decays of Bs mesons Is there New Physics or not?
The experimental validation? Lipkins variable Standard model gives Lipkins variable estimated from experimental results so far is zero within experimental error.
Outline New parameterization of the CKM New form of Jarlskog determinant Maximal CP violation Determination of CKM parameters B meson decay asymmetries Parameterization for CP asymmetries Matrix element calculation Parameter scan Conclusion
New CKM paramaterization KS Form CKM Form We will call the phase in the V31 Jarlskog invariant phase
Maximal CP violation The area of Jarlskog triangle It is maximal when delta = pi /2 It’s physical, true to all parameterization
B meson decay asymmetries There are main contribution from tree and penguin diagrams.
The B meson decay amplitudes are where Let us define
Finally, CP asymmetry is given by, where
Matrix element N. G. Deshpande and X. G. He, Phys. Rev. Lett. 74, 26 (1995) [arXiv:hep-ph/9408404]. A. J. Buras, M. Jamin, M. Lautenbacher, and P. Weisz, Nucl. Phys. B370, 69 (1992) [arXiv:hep-ph/9211304].
where By comparing two equations, we obtain the fitting equations.
Allowed parameter space
Conclusion With the KS parametrization, Jarlskog determinant can be expressed simply and CP violation phenomena can be analyzed more easily. Maximal CP violation is realized. From this accurate determination of the CKM matrix, we can obtain reasonable parameter spaces for FSI phases from LHCb experiments. Standard Model is still acceptable after CP asymmetry measurement.