Speaker
Mr
James Walder
(Lancaster University)
Description
We present measurements of the three Bs mixing parameters: the mass and
width difference between the heavy and light mass eigenstates, Delta M_s and
Delta Gamma_s respectively, and the CP violating phase difference between
Delta M_s and Delta Gamma_s, phi_s. The results are based on a large data
set of proton-antiproton collisions recorded by the Dzero detector operating at
the Fermilab Tevatron Collider. The three mixing parameters are extracted from
several analyses of both time dependent and time independent samples of Bs
decays to flavor specific states such as Ds mu nu and CP eigenstates such as
J/psi phi or Ds(*)Ds(*). The Delta M_s measurement can be used primarily to
limit the magnitude of new physics contributions from Delta Bs = 2 operators
while the combination of the Delta Gamma_s and phi_s measurements can be
used to limit the phase of these operators.
Author
Mr
James Walder
(Lancaster University)
Co-author
D0 Collaboration
