A Critical Examination of SU(3) in D to P P Decays

25 Aug 2015, 15:20
25m
Aspen ()

Aspen

Flavor Violation Theory and Experiment Flavor Violation

Speaker

Ayan Paul (INFN, Sezione di Roma)

Description

The question of the validity of analyzing charmed meson decays to pairs of hadrons within the SU(3) framework has been long and often debated. While there are convincing arguments that small breaking of this symmetry can accommodate for the current experimental results, the inability to compute QCD effects in these modes render it quite impossible to justify with complete authority the physical interpretations of the parameters extracted from experimental data. In our work we explore the SU(3) framework for its strengths and weaknesses and cross-examine it with arguments derived from a diagrammatic approach. We show that isospin non-universality of QCD should be considered within this framework. We also consider η - η' mixing in our attempt to build a complete analysis of these modes. A precise theoretical computation of these modes are desirable to get a handle on the sizes of the SM contributions, especially through the Penguin topologies as they directly affect the SM expectations of CP asymmetries in these modes. Dynamics beyond the SM can possibly manifest itself in the latter observables which will be measured with considerable precision in the coming years at both the B Factory at KEK and the LHCb.

Primary author

Ayan Paul (INFN, Sezione di Roma)

Co-authors

Enrico Franco (INFN, Sezione di Roma) Luca Silvestrini (INFN Rome) SATOSHI MISHIMA (INFN Rome)

Presentation Materials