Abstract
The New Physics sensitivity of the s → dγ transition and its accessibility through hadronic processes are thoroughly investigated. Firstly, the Standard Model predictions for the direct CP-violating observables in radiative K decays are systematically improved. Besides, the magnetic contribution to ε′ is estimated and found subleading, even in the presence of New Physics, and a new strategy to resolve the ε′ electroweak versus QCD penguin fraction is identified. Secondly, the signatures of a series of New Physics scenarios, characterized as model-independently as possible in terms of their underlying dynamics, are investigated by combining the information from all the FCNC transitions in the s → d sector.
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Mertens, P., Smith, C. The s → dγ decay in and beyond the Standard Model. J. High Energ. Phys. 2011, 69 (2011). https://doi.org/10.1007/JHEP08(2011)069
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DOI: https://doi.org/10.1007/JHEP08(2011)069