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Thursday, January 22
1:30 p.m. Special Theoretical Astrophysics Seminar (NOTE DATE, TIME, LOCATION) - Theory Conf Rm
Speaker: D. Lazzati, University of Cambridge - WH-3NE
Title: Beaming, Magnetization and Dynamics of Gamma-Ray
Burst Jets
2:30 p.m. Theoretical Physics Seminar - Curia II
Speaker: M. Wingate, University of Washington
Title: Toward More Precise Lattice Simulation of B Physics
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
THERE WILL BE NO ACCELERATOR PHYSICS AND TECHNOLOGY
SEMINAR TODAY
Friday, January 23
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speaker: M. Mangano, CERN
Title: The 15-Year Saga of the b Cross-Section
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Thursday, January 22
Wild Mushroom Bisque
Cheesy chicken, mushroom and wild rice casserole $3.50
Smoked salmon w/creamy brie and wild greens w/dill mayo $5.50
Asst. gourmet stackers sandwich or panini $4.75
Buffalo style chicken wings w/celery and carrot sticks $4.75
Classic Greek salad $3.75
Hand rolled Hanabi sushi
Eurest Dining Center Weekly Menu
Chez Leon
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Continuing Power Problems in Meson Area
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Meson power will remain off for at least two days. |
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Faults in electrical feeders 30 and 31 beginning on Tuesday evening, January
20, have resulted in repeated and continuing power failures in the Meson
Area. Operations Chief Bob Mau reports that repairs are underway but will
not be completed until at least Friday.
"What this means," Mau said in a 6 a.m. email message today, "is that Meson
power will remain off for at least 2 days. So the name of the game will be
lots of generators and restricted power loads in the Meson area."
Generators have been brought on line to produce enough power to keep
critical areas from freezing.
"As far as turning on any loads in Meson," Mau said, "Requests should be
made to the crew chief in the Main Control Room at 3721. All large loads
will probably be denied."
Fermilab Today will provide daily updates on Meson power as they become
available.
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January 19 - January 21
- During this time period Operations established one store. That
store combined with one that already existed provided twenty-nine
hours of luminosity to the experiments.
- The Tevatron suffered a sector F4 quench on Tuesday.
- Feeder 30 tripped off and caused a problem with CHL and Meson.
View the current accelerator update
View the Tevatron Luminosity Charts
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From Crain's Chicago Business, January 20, 2004
Tech group adds Lipinski
By Kelley Quigley
U.S. Rep. William Lipinski, D-Chicago, is the latest politician to join the board of the Illinois Coalition, where he'll play a key role in prioritizing projects for the Chicago-based technology and science booster group.
Illinois Coalition President John Maxson said the congressman's membership on the House Committee on Transportation and Infrastructure will help the coalition lure major scientific infrastructure and research projects to the state.
read more
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CDF Measures the W Boson Polarization at High Transverse Momentum
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The transverse polarization of W bosons seen by CDF and D0, compared to
the theoretical prediction (red line). (Click on image for larger version.) |
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It's a bright sunny day as you drive along, wearing a pair of smart
Polaroid sunglasses. Ever wonder how they stop that disturbing
reflection of the Sun from the road? Light reflected off a
surface is "polarized." Its electric field oscillates
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Lucio Cerrito is a research associate at
the University of
Illinois at Urbana. He is now working on top-quark physics at CDF. |
along an axis parallel to the reflecting surface. Your sunglasses
are treated with a thin film which absorbs that component.
W bosons, the mediators of the weak nuclear interaction, show
properties of polarization too. The vast majority of W's produced
at the Tevatron are polarized in a way that we call "transverse
left handed," while they move slowly away from the colliding
beams. Only a small fraction of W's directly produced move much
more rapidly, a mechanism explained by the dynamics of the
strong interaction (QCD) acting on the colliding quarks in the
proton and antiproton. Does QCD alter the transverse polarization
of W's?
Yes, and we have measured this effect with the CDF detector, improving an
earlier D0 measurement. The transverse polarization, determined
by looking at the direction of flight of W-decay products,
decreases with higher W transverse momentum (an indicator of the motion
away from the beam line) by about 1% per GeV/c. Besides testing the
effects of QCD on W production, the result improves the knowledge of the
properties of the W boson and helps the precise determination of the W
mass. The value of the W mass is a key ingredient to predict the mass of the
Higgs boson. A better measurement still is expected using Run II data, which will
amount to many times the Run I sample.
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Discounted Tickets for Fermilab Employees
The Crossroads Theater in Naperville presents the comedy,
"Straight Up with a
Twist," and offers special discounts (two for one) for Fermilab employees on
Friday, January 23 and Saturday, January 24 at 8:00 p.m. and
on Sunday, January 25
at 4:30 p.m.
more information
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