National Engineers Week 2004|
Thursday, February 26
THERE WILL BE NO THEORETICAL PHYSICS SEMINAR TODAY
9:00 a.m. Engineering Updates - WH10N - West Wing
Jim Volk, AD - Alignment Improvement to Tevatron
Vic Kuchler, FESS - Linear Collider Civil Design
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4:00 p.m. Accelerator Physics and Technology Seminar - 1 West
Speaker: R. Talman, Cornell University
Title: String Formulation of Space Charge Forces in a
Friday, February 27
8:15 a.m.- 2:30 p.m. Science Institute Day - Ramsey Auditorium
11:00 a.m. Engineers Week - WH 1 North
Rube Goldberg Challenge and Lunch
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speaker: G. Shiu, University of Wisconsin
Title: Testing String Theory from the Sky
Thursday, February 26|
Wild Mushroom soup
Orzo pasta w/chicken, artichokes, olives and sundried tomatoes $3.50
Hawaiian sweet and sour pork over jasmine rice $3.50
Ham & mozzarella wrap w/basil cream cheese $4.75
Buffalo style chicken wings served w/soup or fries $4.75
Hand rolled Hanabi sushi
Eurest Dining Center Weekly Menu
Feedback wanted on Performance Appraisal System|
The Laboratory Services Section is looking for your feedback on the new performance appraisal system. This is the first year in which the new system is fully implemented. As with any new process there is opportunity for improvement.
Over the last three months LSS has held a series of meetings with managers to hear from them. From division heads to department managers, from directors to randomly selected supervisors, LSS has received their feedback. Equally important, LSS now wants to hear from employees who have undergone evaluation and participated in appraisal conversations.
To facilitate the feedback process, LSS managers have prepared a
questionnaire. A few days ago all employees received a
memo from Director Michael Witherell with a paper
copy of the questionnaire. Please fill
out the form and mail it to M.S. 107 by
March 15. You may submit the information
anonymously. Alternatively, employees
can fill out an online form
or send an email to email@example.com.
All feedback will be kept in strictest confidence.
LSS will only report ideas and suggestions in summary
format to the Directorate. Fermilab Today will announce
the URL to the final LSS report as well as
any resulting changes to the performance appraisal process.
Craig Venter to Speak at Science Institute Day Tomorrow|
Craig Venter, president of The Center for the Advancement of Genomics
and founder of Celera Genomics, will give the keynote address
at 8:15 a.m. at Friday's Science Institute Day at Fermilab. The 2004
Science Institute Day combines the Symposium on the
Nature of Science, a series of lectures for teachers
of grades 6-12, and the Science Resource fair for grade
K-8 teachers. Over 200 teachers from Kane and DuPage
counties are registered for the event.
All Fermilab employees are invited to attend the
Symposium on the Nature of Science. In addition
to Venter's keynote speech, which kicks off the day
for Symposium and Resource Fair attendees,
the Symposium will include lectures on the physics,
chemistry and biology of the Human Genome Project.
Leon Lederman will provide closing remarks.
"The theme for the day is the interdisciplinary nature of science,"
said Spencer Pasero of Fermilab's Education Office. "The Symposium
speakers will be talking about their own work and making connections to other areas of science."
All lectures will take
place in Ramsey Auditorium.
The complete schedule can be found online.
February 23 - February 25|
- During this period Operations established one store. That store
along with one that already
existed provided approximately 44 hours and 47 minutes of
luminosity to the experiments.
- Booster had power supply problems with GMPS and CEPNE1.
- Pbar had a power supply problem with A:IB.
- Operations sent beam to experiment located at MT6 in the Meson
View the current accelerator update
View the Tevatron Luminosity Charts
From Science Daily, February 19, 2004|
How Did Matter Come To Dominate The Universe?
San Francisco, CA -- The seemingly unremarkable fact that the universe is full of matter turns out to be something physicists can't quite account for. According to the big bang theory, equal amounts of matter and antimatter were created at the birth of the universe, but precious little antimatter is to be found in the universe today. Everything we see, from our bodies to our cars to the stars in distant galaxies, is made of matter. Cosmic rays and high-energy physics labs routinely create antimatter particles, but they soon interact with particles of matter and vanish in bursts of pure energy.
Studying the Strong Interaction with Charm Meson Production at CDF|
|Comparison of the measured yield of D0 mesons (black points) with the theoretical
prediction (yellow band). The data exceeds the theory, just as what was observed for
B mesons in Run I. (Click on image for larger version.)|
In Run I of the Tevatron, both CDF and DZero measured
probability, or cross section, of bottom quarks. The measured cross sections
were found to be two to three times larger than expected. There was
that the higher production rate could signal the creation of some
new particle. Recent
theoretical developments have reduced this discrepancy, but
rates are still in excess of predictions. Because charm quarks
are approximately three
times less massive than bottom quarks, measuring charm particle
the theory in a different way.
For Run II, CDF constructed the Silicon Vertex Tracker or SVT to trigger the experiment
on the decays of hadrons containing bottom quarks by exploiting the relatively
long lifetime of these bottom hadrons. When the SVT was commissioned, the collaboration
found that this trigger was very efficient for detecting hadrons containing
charm quarks as well. The charm hadron cross section was measured using only the
first few inverse picobarns of data collected with the SVT, and this measurement
laid the foundation for the much wider program in charm physics now undertaken by
CDF. This program includes searching for new physics by looking
for CP asymmetries in charm hadron decays, D0 mixing,
and rare decays.
The figure above shows the production cross section of D0 mesons, which are a bound
state of a charm quark and an up antiquark, as a function of the transverse momentum
of the charm meson. The points are the data and the yellow band shows the theoretical
prediction. As with bottom hadron production, the data lie above the theoretical
prediction and the size of the discrepancy is comparable to the size of the discrepancy
between data and theory for bottom hadrons, pointing more towards needing further
understanding of the theory of production of heavy quarks, rather than an explanation
that involves new particles.
These results are the first Tevatron Run II results that are published in
Physical Review Letters.
|This measurement was
performed by members of the CDF group at the University
of Pennsylvania. Pictured are Joseph Kroll (left) and Rolf
measurement was the thesis
of Chunhui Chen (above). (Click on image for larger version.)|
Result of the Week Archive
URA Scholarship Deadline is March 1|
Universities Research Association, Inc. (URA) offers
a number of four-year scholarships to children of
regular full-time employees of Fermilab. The
scholarship award will be continued for a maximum
of four years providing the student remains in a
four-year program with satisfactory academic progress
at college. The maximum scholarship award amount available
for tuition and fees is $4,000 per year. Application forms
for the URA scholarship are available and should
be submitted by March 1, 2004.