Thursday, March 11|
THERE WILL BE NO THEORETICAL PHYSICS SEMINAR TODAY
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
THERE WILL BE NO ACCELERATOR PHYSICS AND TECHNOLOGY SEMINAR TODAY
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
With or Without Silicon Upgrades, Work at SiDet Continues|
(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
research to publish, with applications for future particle detectors.
|Brenna Flaugher and|
Nicola Baccheta hold
in its case.
(Click on image
for larger version.)
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
"When you have a highly qualified group of people working on a significant
Flaugher said, "it's important to capture all the benefits you can."
FYI: AIP Bulletin of Science Policy News, March 9, 2004|
DOE Office of Science Issues 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
two reports chart the course that the Office of Science
intends to pursue in the next two decades.
|Office of Science|
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.
Using Rare B-decays at CDF to Probe New Physics|
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
In the Bs the
bottom-quark is paired with an anti strange-quark, while for Bd
with an anti down-quark. The Standard Model predicts the
to be very small, less than about 1 in 250,000,000, and the
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
the Standard Model prediction would be unambiguous evidence for new physics.
Professor Teruki Kamon|
of Texas A&M University
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.
|(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.
Fermilab Film Series
The Fermilab Film Series will present Y Tu Mama Tambien
on Friday, March 12 at 8:00 p.m.