28-31 October 2014
Waldhotel Zollernblick
Europe/Berlin timezone

Penguin Pollution in B^0 -> J/psi K^0 and B_s -> J/psi phi Decays

28 Oct 2014, 16:50
Waldhotel Zollernblick

Waldhotel Zollernblick

Am Zollernblick 1 72250 Freudenstadt - Lauterbad http://www.zollernblick-lauterbad.de/


Mr. Philipp Frings (Institute for Theoretical Particle Physics (TTP))


The size of the penguin pollution from the u-quark loop is under debate for many years, and this issue must be settled when future precise data on the famous mixing-induced CP asymmetries will be analysed to measure sin(2*beta) or beta_s. We have caluclated the penguin pollution from first principles, using methods of soft-collinear factorisation. (Earlier attempts to do such a calculation for the B-> J/psi K_S branching ratio around 12 years ago had failed. The situation for the penguin pollution, however, is different.)

Primary author

Mr. Philipp Frings (Institute for Theoretical Particle Physics (TTP))

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