arXiv:0803.0659·v2·High Energy Physics — Phenomenology
First Evidence of New Physics in b <--> s Transitions
The UTfit Collaboration: M. Bona · M. Ciuchini · E. Franco · V. Lubicz · G. Martinelli · F. Parodi · M. Pierini · C. Schiavi · L. Silvestrini · V. Sordini · A. Stocchi · V. Vagnoni
Abstract
We combine all the available experimental information on Bs mixing, including the very recent tagged analyses of Bs to J/Psi phi by the CDF and D0 collaborations. We find that the phase of the Bs mixing amplitude deviates more than 3 sigma from the Standard Model prediction. While no single measurement has a 3 sigma significance yet, all the constraints show a remarkable agreement with the combined result. This is a first evidence of physics beyond the Standard Model. This result disfavours New Physics models with Minimal Flavour Violation with the same significance.
Comments: 5 pages, 2 figures, 2 tables. v2: added a note on more recent Tevatron results