[SEMINARI]: Dr. Fernandez de Troconiz: A measurement of sin(2 beta) from B -> J/Psi K_s with the CDF detector

[Arcadi Santamaria]

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                              S E M I N A R I

            [Image]    Departament de Física Teòrica     [Image]
                          Universitat de València
                      46100 Burjassot (València) Spain

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      A measurement of sin(2 beta) from B -> J/Psi K_s with the CDF detector

                         Jorge Fernandez de Troconiz

                         (Univ. Autonoma de Madrid)

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                     Aula de Seminaris de Física Teòrica
                   Tuesday 22 of June of 1999 at 12:00 AM
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                                    Resum

 We report un updated direct measurement of the Standard Model CP violation
 parameter sin(2 beta) using the CDF detector at Fermilab. The signal sample
  consists of ~400 J/Psi K_s events. A maximum-likelihood fitting method is
used to measure sin(2 beta)=0.79 +0.41 -0.44 (stat+syst). We calculate a 93%
Feldman-Cousins confidence interval of 0 < sin(2 beta) < 1. This measurement
  is the best indication for CP violation in the neutral B meson system to
                                   date.

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