Dr. Joel G. Heinrich
I work with the
Penn CDF Group doing
research in the physics of b-quarks with the
CDF experiment at
Fermilab. A
general overview of B-Physics at CDF can be found on the
CDF B Group home page. Recently my CDF colleagues Kevin Pitts
(UIUC)
and
Nigel Lockyer (Penn) and I measured the Standard Model parameter
sin2ß using
B° -> J/psi K°S decays.
Our answer, sin2ß=0.79+0.41-0.44, gives
some indication
that CP symmetry is violated in B meson decays.
Details of this measurement can be found in:
Update (July 2001): Including the new official BaBar and BELLE values,
the world average sin2ß
(5 experiments, my calculation) is now 0.79 ± 0.10.
This is consistent with the Standard Model expectation of about +¾, and
is 7.9 sigma above zero.
(On this page I am using ß to represent the Greek
letter beta---I know ß is really a German sz ligature.)
Problems worthy of attack prove their worth by hitting back. Piet Hein
The rest of my home page contains a set of links to pages that I
find useful or interesting. I try to keep the lists current, but the
links seem to decay at a rate of about one per week. (But do they oscillate?)
CDF Run II
This page has been visited 10652 times since January 15, 2004.
Last modified: September 03, 2007 01:06AM
J.G.H