Charmonium physics in B decays at BaBar

par Dr Elisabetta Prencipe (LAPP)

vendredi 17 oct. 2008, 14:00 → 15:00 Europe/Paris

Auditorium (LAPP)

The BaBar experiment, located at SLAC (Stanford Linear Accelerator Center) was projected to measure the three sides and the angles of the Unitarity Triangle, using the high luminosity achived and the asymmetry of the electron-positron beams of the PEP-II. The determination of the element of CKM-matrix is important to check the consistence of the Standard Model of the electroweak interactions, and search eventually for new physics. Recently B-factories have been demonstrated to be also real c bar-c factories, offering excellent opportunity to search for new states. In particular, the discovery of new resonance like X(3872), Y(4260) and many others in B-factories like BaBar, Belle opened the door to a challenging and promising field of research in Physics. Thanks to the integrated high luminosity achieved in 9 years of data runs, Charmonium Physics and search for new states in BaBar have become possible. Recent not-full-understood new resonances discovered at BaBar will be presented, with particular attention to the study of the rare B meson decay B->Jpsi phi K. The new measurement of the BR and the study of the invariant mass [J/psi phi] will be introduced, since it represents the most promising place to look for possible tetraquark states.

Slides Prencipe_LAPP_seminar.pdf