Fermilab TodayThursday, March 11, 2004  
Thursday, March 11
3:00 p.m.- 5:00 p.m. Special Seminar - 1 West
Long Range Planning Report Summary Hugh Montgomery
Linear Collider Steve Holmes
Proton Driver Bob Kephart
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over

Friday, March 12
3:30 p.m. Wine & Cheese - 2nd Flr X-Over
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speaker: M. Schmitt, Northwestern University
Title: Apparent Excess in e+e- ? Hadrons

Thursday, March 11
Corn and Green Chile Bisque
Roast pork tenderloin carved to order w/pan gravy and two market sides $3.50
Pasta alla carbonara w/bacon, peas and grated parmesean over penne pasta $3.50
Lean roast beef piled high w/pepperjack and a tangy horseradish mayo $4.75
Buffalo chicken sandwich w/blue cheese and served w/fries or soup $4.75

Eurest Dining Center Weekly Menu
Chez Leon
WeatherChance Snow 34º/14º

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With or Without Silicon Upgrades, Work at SiDet Continues
SiDet Group
(Left to Right) Satyajit Behari, Greg Derylo, Guilherme Carduso, Jeff Andresen, and Ron-Shyang Lu in front of the barrel at SiDet. (Click on image for larger version.)
A small group of about 10 scientists continue to work on completing part of the CDF Run IIb Silicon Upgrade Detector, two barrels of silicon sensors meant to surround the beampipe at the heart of the detector. The group wants to capitalize on the R&D that had gone into the advanced detector system when the Run IIb upgrades were cancelled in September. There is valuable
Brenna Flaugher and
Nicola Baccheta hold
a stave in its case.
(Click on image
for larger version.)
research to publish, with applications for future particle detectors.

Early tests look promising, noted Brenna Flaugher, Deputy Leader of the Silicon Detector Center, or SiDet. "Ideas that were sort of a guess were fleshed out and shown to work," she said. In the final version, each barrel would contain 90 identical "staves" arranged parallel to the beampipe. The stave is a unique design, a self-contained unit containing four silicon chips and with the readout cable and cooling tubes embedded. In the closeout, the group will only build one barrel and install 10 staves. The final test will look for noise from interacting staves.

"When you have a highly qualified group of people working on a significant project," Flaugher said, "it's important to capture all the benefits you can."

Accelerator Update
March 8 - March 10
-Fault on Feeder #35 caused problems.
- Operations established 1 store during the last 48 hours. They delivered approximately 25 hours of luminosity to the experiments.

View the current accelerator update
View the Tevatron Luminosity Charts

In the News
FYI: AIP Bulletin of Science Policy News, March 9, 2004
DOE Office of Science Issues Strategic Plan
Strategic Plan
Office of Science
Strategic Plan
The Department of Energy's Office of Science has released a Strategic Plan for the next twenty years. Complementing the twenty year facilities plan issued last November the two reports chart the course that the Office of Science intends to pursue in the next two decades.

The Strategic Plan was the result of many interactions with the Office of Science's Advisory Committees, senior officials of national laboratories and the university community, and other interested individuals, as well as a review of policy documents. The plan contains numerous illustrations and layman-oriented descriptions of various programs, and can be accessed online.
read more

Fermilab Result of the Week
Using Rare B-decays at CDF to Probe New Physics
CDF Result of the Week
The invariant mass distribution of events passing all our selection criteria. Only events falling into the hatched regions are possible Bs(d)-->µ µ decays. (Click on image for larger version.)
With the Run II data and their upgraded detectors, both CDF and DZero are hoping to discover evidence for physics beyond the Standard Model -- the glibly named theory which presently describes sub-atomic physics. One such piece of evidence might turn up in rare decays of particles containing bottom quarks, such as the Bs and Bd particles.

In the Bs the bottom-quark is paired with an anti strange-quark, while for Bd it's paired with an anti down-quark. The Standard Model predicts the Bs-->µ µ decay rate to be very small, less than about 1 in 250,000,000, and the Bd-->µ µ rate to be 40 times smaller. Recent results on the muon anomolous magnetic moment and the amount of dark matter in the universe point to supersymmetric theories which predict decay rates 10 to 1000 times larger than these. Whatever the cause, a measured rate significantly larger than
CDF Result of the Week
Professor Teruki Kamon
of Texas A&M University
also contributed to the
the Standard Model prediction would be unambiguous evidence for new physics.

Using data through September 2003, the CDF experiment has looked for evidence of these decays in about 10 trillion proton-antiproton collisions. As shown in the plot, one event was observed, which is consistent with the Standard Model (background) expectations. We use this result to place an upper bound on the decay rate of 5.8x10-7 (1.5x10-7) for the Bs (Bd), thus excluding Bs decay rates of >150 times the Standard Model and significantly restricting the parameter space of some supersymmetric theories. These are the best limits in the world for these decays. More data and improved analysis techniques will help push the sensitivity ever lower, and might ultimately reveal evidence for new physics.
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CDF Result of the Week
(From left to right) Slava Krutelyov of Texas A&M University, Matt Herndon of Johns Hopkins University, and Doug Glenzinski and Cheng-Ju Lin of Fermilab all worked on this analysis. (Click on image for larger version.)
Result of the Week Archive

Long Range Planning Report Summary Today
The Long Range Planning committee will present a summary report from 3:00 p.m. to 5:00 p.m. today in One West. Live streaming video will be available at 3:00 p.m.
more information

Fermilab Film Series
The Fermilab Film Series will present Y Tu Mama Tambien on Friday, March 12 at 8:00 p.m.
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