Session D10 - Charm Quark States.
ORAL session, Saturday afternoon, May 01
Governor's Square 11, Adam's Mark Hotel
A novel hadronic trigger at CDF provides a unique opportunity to study the properties of bottom and charmed baryons produced in p\barp collisions at \sqrts\sim 2 TeV.
We have searched for heavy-strange baryons in decay chains containing long lived hyperons -- \Xi and Ømega as decay products.
Long lived charged hyperons, \Xi^- and Ømega, are capable of traveling significant distances in the volume of the SVX/ISL detectors and producing hits in silicon, before decaying into pairs of \Lambda^0\pi^- and \Lambda^0\rmK^- respectively. This gives a unique opportunity of finding hyperon tracks in the SVX/ISL detectors. The tracking of hyperons in the silicon detector results in a dramatic reduction of the combinatorial background and an improvement of the momentum resolution compared with standard reconstruction using final decay products. For the first time at CDF we observed signal from Ømega hyperons.
We report an observation of charmed-strange baryon isodoublet \left \ \Xi_c^0, \Xi_c^+\right \ for the first time in p\bar\rmp collisions.