Fermilab TodayThursday, January 22, 2004  
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

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

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
Weather Blustery 9º/1º

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Secon Level 3

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Continuing Power Problems in Meson Area
Meson Building
Meson power will remain off for at least two days.
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.

Accelerator Update
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

In the News
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

Fermilab Result of the Week
CDF Measures the W Boson Polarization at High Transverse Momentum
The transverse polarization of W bosons seen by CDF and D0, compared to the theoretical prediction (red line). (Click on image for larger version.)
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
Lucio Cerrito
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.

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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