Thursday, September 2|
11:00 a.m. Special Seminar - Curia II
Speaker: Y. Enari, Nagoya University
Title: Search for New Physics in Lepton Flavor Violating Tau
Decays at Belle
2:30 p.m. Theoretical Physics Seminar - Curia II
Speaker: A. Lenz, University of Regensburg
Title: On the SU(3) Symmetry-Breaking Corrections to Meson
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
THERE WILL BE NO ACCELERATOR PHYSICS AND TECHNOLOGY
Friday, September 3
8:00 a.m.- 10:00 a.m. Special Videostream Session from Durham ECFA Linear Collider Workshop - Hornets' Nest - WH-8X0
Speakers: H. Weerts, Michigan State University/Fermilab, S. Yamashita, University of Tokyo, T. Behnke, DESY
Title: Worldwide Detector Concept Studies for Linear Collider
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
THERE WILL BE NO JOINT EXPERIMENTAL THEORETICAL PHYSICS
SEMINAR THIS WEEK
Thursday, September 2|
Tomato Florentine soup
Grilled Chicken Cordon Bleu Sandwich $4.75
Chicken Marsala $3.75
Maryland Crab Salad $4.75
Italian Sausage Calzones $2.75
SW Chicken Salad with Roasted Corn Salsa $4.75
Wilson Hall Cafe Menu
Photographer Lindy Smith Visits Fermilab|
Lindy Smith at Fermilab arranging prairie plants on
paper that has a special chemical sensitizer painted onto it. (Click on image for
Photographer Lindy Smith spent a week at Fermilab last month, photographing
prairie plants with an extremely unique method -- no camera. Smith, who
published Straight West, a photography book about the American West, uses
an historical process that combines painting, chemistry, ecology, and of course,
photography. This nineteenth century technique involves handcoating paper
with a chemical sensitizer. Smith arranges the prairie plants on the paper
after it is dry and exposes the print outside in the sun for 30 to 60 minutes.
The prints then go through the regular photographic process, setting the
image on the paper. "I started by using the weeds in my garden," Smith said.
"I realized that I was more interested in the weeds rather than the plants
I was growing."
Smith, who is originally from Iowa but now lives in upstate New York,
usually works with smaller woodland plants such as ferns. "I am printing much bigger
out here because everything is so much taller," she said. "Plants are very
stiff and thick in the prairie, so I have been spending a lot of time here
just trying to figure out how to arrange things on the paper." Smith worked
closely with Roads & Grounds, FESS' Rod Walton and Prairie Restoration
Project founder Bob Betz during her visit, catching a pretty good case of
prairie fever. "The whole process is quite evolutionary because the photograph
changes as it goes through each step," she said. "A lot of people actually
don't realize that they are photographs because they look so much
FYI: AIP Bulletin of Science Policy News, August 31, 2004|
House Rejects Rep. Holt Amendment to Establish OTA-Capability
During last month's consideration of the FY 2005 Legislative Branch Appropriations
Bill, Rep. Rush Holt (D-NJ) was unsuccessful in his attempt to increase the
scientific analytical staff available to Members of Congress. Holt's amendment,
designed to replace some of the capabilities that were lost when the Office of
Technology Assessment was closed in 1995, was
defeated by a vote of
The Office of Technology Assessment (OTA) was one of the few in-house analytical agencies available to Members of Congress. (Other units are the Library of Congress's Congressional Research Service, the General Accountability Office, and the Congressional Budget Office.) OTA produced high-quality reports on a wide range of technology-related issues that were marked by their evenhandedness, depth, and high quality. After Republicans took control of both the House and Senate in 1995, they sought to reduce what they deemed unnecessary spending, and began by looking at their own operations. Following considerable debate in both chambers, the Office of Technology Assessment was defunded.
From Space.com, August 31, 2004|
Getting a Grip on Antimatter
Research into what separates matter from antimatter is accelerating in particle physics experiments around the world. Scientists are hoping the difference will help explain why you, me and all the things around us are made of matter instead of its opposite.
Shortly after the Big Bang theoretically kicked off everything, the universe was a hot soup of equal parts matter and antimatter, scientists say. Why the former came to dominate is a question that physicists have yet to answer fully.
Recent results from the BaBar experiment in California have confirmed one departure between the two substances, but to solve the puzzle more deviations will have to be found.
"This was a very important step on the road to understanding the matter-antimatter asymmetry," said David MacFarlane, a physicist with the BaBar group. "This asymmetry is one of the fundamental questions of cosmology."
Rare and Beautiful Decays|
Invariant mass of the µ+ µ-
pairs of the remaining background in data that satisfy requirements on
discriminating variables. (Click on image for larger version.)|
The observation of a Bs meson decaying in to a muon and anti-muon,
and nothing else, offers a powerful window into possible physics scenarios not
described by the current Standard Model.
A Bs particle consists of an anti-beauty quark and a
These cannot combine directly to form a muon and anti-muon. Our Standard
Model, however, predicts that it is still possible to have such a decay,
but only through
a more involved web of intermediate particles. All this occurs in such a short
time that Heisenberg's Uncertainty Principle allows the intermediate particles
to be more massive than either the Bs or muons. These additional
heavy particles lead to this particular decay being very rare.
The Standard Model predicts that roughly only one out of 300 million Bs
particles will decay this way! If other new massive particles due to new
physics not described by the Standard Model exist, then they can possibly
participate in these intermediate steps and dramatically increase the probability
that the Bs can decay into a muon and anti-muon.
After combing through data taken through April 2004 with the DZero detector,
four candidates were observed as shown below, while 3.7 +/- 1.1 candidates
were predicted to come from background, i.e., random muons that when
combined accidentally appear to come from Bs decays. From this
observation, we know that fewer than 1 in roughly 2.2 million Bs
particles decay into a pair of muons. Although this is still not yet at the
sensitivity to observe the tiny rate predicted by the Standard Model, it still
rules out many theoretical models predicting particles that would result in
a rate larger than what we see in our data.
Angela Bellavance (left) (University of Nebraska) worked
on the Level 3 trigger and Dennis Shpakov (Northeastern University) worked
on the readout used for this, and other, analyses.|
Ralf Bernhard (right) and Frank Lehner of FNAL,
visiting from the University of Zurich, worked on the analysis searching
for these rare decays.|
Result of the Week Archive
Weekly Time Sheets|
With the upcoming Labor Day Holiday on Monday, September 6, Weekly Time
Sheets are due in Payroll by 10:00 a.m. on Friday, September 3, 2004.
Streaming Video of ECFA Workshop Available Tomorrow
A plenary session from the ECFA Workshop on Physics and Detector Studies
for Linear Collider in Durham, UK will be broadcast on streaming
video tomorrow from 8:00 a.m. to 10:00 a.m. in the Hornet's Nest on the
8th floor of Wilson Hall. The agenda for the plenary session follows:
8:00 a.m. The Case for a Silicon Tracking Detector Concept - Harry Weerts
8:30 a.m. The Case for a Huge Gaseous Tracking Detector Concept - Satoru Yamashita
9:00 a.m. - The Case for a Medium Gaseous Tracking Detector Concept - Ties Behnke
9:00 a.m. - Discussion on Technical and Strategic Questions - all
Streaming Video Information
UEC Career Night
The Fermilab UEC will be hosting a
Career Night on Thursday, September 9
from 7:00 p.m. to 9:00 p.m. in One West.
The talks are aimed at graduate students
and young physicists, but everybody is
welcome. Wine and cheese will be served
from 6:00 p.m. to 7:00 p.m. For more
information, contact a member of the
Organizing Committee: Ken Bloom,
Sharon Hagopian, Lydia Lobo, or Paul
Downtime Scheduled for IMAPServer2
On September 4 and 5, IMAPServer2 will be upgraded.
The upgrade will take approximately 12-14 hours.
The work will start at 10:00 p.m. on September 4, and it
should be completed by noon on September 5.
Wilson Hall Power Outages
- Power will be out September 13 for half an hour starting at approximately 7:00 a.m.
- Power will be out September 24 for half an hour starting at approximately 7:00 a.m.
For more information, contact Wilson Hall Building Manager Stan Boyson at x4753.