B Physics at In relation to SUSY ? 4th Workshop on Mass Origins

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Presentation transcript:

B Physics at In relation to SUSY ? 4th Workshop on Mass Origins Fumihiko UKEGAWA CDF Collaboration (University of Tsukuba, Japan) 4th Workshop on Mass Origins and Supersymmetry Physics March 6 – 8, 2006 Epochal Tsukuba, Tsukuba, Japan

B physics at a hadron collider ?

CDF di-muon triggers Near J/y Wide mass range ~15% from B decays

Bound state of two different heavy quarks c p u d J/y Bc

Run-II Silicon Vertex Trigger : SVT Use silicon information at the 2nd level of trigger Find a track in the main tracker COT. Extrapolate toward the SVX. Find SVX hits along the road. Calculate impact parameter wrt the primary vertex (beam spot). Resolution ~50 mm for > 2 GeV/c. Typical trigger requirement : two tracks above 2 GeV/c, | d | > 120 mm, Lxy > 500 mm.

B signals from CDF SVT triggers : full reconstruction 4800 4900 Understand proper time resolution and flavor tagging

B physics : does the unitarity triangle close?

Kobayashi-Maskawa picture holds good, 2019/4/21 2005 Kobayashi-Maskawa picture holds good, but we are looking for possible discrepancies! www.utfit.org ckmfitter.in2p3.fr

New physics effects on the unitarity triangle ? Now seems unlikely, or looking for a very small discrepancy. Need more precision, but now hit the wall? Still largely untested. BS oscillations crucial. Precise angle g ?

New physics in b  s transition ? Belle : PRL 91, 261602 (2003)

CDF can provide unique tests of b  s (SUSY?)

FCNC Vtd for B0d, Vts for B0s Helicity suppressed. B.F. very small. d, s t w l+ l- Z/g FCNC Vtd for B0d, Vts for B0s Helicity suppressed. B.F. very small. SM predictions for B.F.

B.R. < 5.1 x 10-8 for B0d B.R. < 2.0 x 10-7 for B0s @ 95% C.L. No candidate in the B0d or B0s mass windows. B.R. < 5.1 x 10-8 for B0d B.R. < 2.0 x 10-7 for B0s @ 95% C.L. PRL 95, 221805 (2005) CDF Run-I limits : B.R. < 8.6 x 10-7 for B0d B.R. < 2.6 x 10-6 for B0s PRD 57, 3811 (1998)

Future : look for CP-violation, ~0 expected in SM, arg(Vts). 260 pb-1 Future : look for CP-violation, ~0 expected in SM, arg(Vts).

1.1 k total 17 k

Pion mass assigned to h+ h- Use dE/dx and mass 2019/4/21 Total 891±47 Signal 891 +/- 47 Pion mass assigned to h+ h- Use dE/dx and mass distributions to determine composition

Soon +/- 0.04 Angle g in a longer term (after Dms)

Near future : polarizations

Summary CDF Run-II has a rich B Physics program Enhanced capabilities : CDF has added silicon-based trigger, enabling to collect all-hadronic final states such as B  D p, Bs  K+K- . Lepton triggers remain valuable, J/y K and l n D. Expect to collect 2.5 fb-1 by end of 2006, and 9 fb-1 by 2009, and to make some significant measurements.