Fermilab TodayThursday, April 15, 2004  
Thursday, April 15
11:45 a.m. Third Thursday Lunchtime Cleanup - WH - Ground Floor, East Side
2:00 p.m. Theoretical Physics Seminar - WH-3NE Theory Conference Room (NOTE TIME and LOCATION)
Speaker: F. Marchesano, University of Wisconsin
Title: Yukawa Couplings from Magnetized Compactifications
1:30 p.m. International Workshop: Neutron Therapy Facility Reports
Location: Curia II
Speakers: see agenda
2:30 p.m. DIRECTOR'S COFFEE BREAK (NOTE TIME) - 2nd Flr X-Over
3:00 p.m. Accelerator Physics and Technology Seminar (NOTE TIME) - 1 West
Speaker: G. Dugan, Cornell University
Title: The U.S. Linear Collider Technology Options Study

Friday, April 16
9:00 a.m. International Workshop: Neutron Therapy Calibration Protocols
Location: Curia II
Speakers: see agenda
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speaker: D. Glenzinski, Fermilab
Title: Search for Bs-->mu mu and Bd--> mumu in ppbar Collisions at sqrt(s)=1.96 TeV
8:00 p.m. Fermilab International Film Society - Auditorium
Tickets: Adults $4
Title: Conte d'Automne (Autumn Tale)

Saturday, April 17
8:00 p.m. Fermilab Arts Series - Auditorium
Tickets: $15/$8
Title: Manya: The Living History of Marie Curie

Thursday, April 15
Louisiana Red Beans
Country fried steak w/noodles $3.50
Baked fish w/rice $3.50
Assorted gourmet sandwiches and panini $4.75
Double bacon cheese burger w/soup or fries $4.75
Rustic chicken salad over wild greens w/fresh fruit $3.75

Eurest Dining Center Weekly Menu
Chez Leon
Weather Breezy 73º/53º

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Neutron Therapy Workshop at Fermilab
Beginning today, Fermilab hosts 20 experts from neutron therapy facilities around the world. From Germany to South Africa, experts have come for a 2-day workshop to hear about and report on the advances made in treating various forms of cancer using high-energy neutron beams. Like other radiation
Arlene Lennox
Arlene Lennox
treatments, neutron therapy aims at destroying cancerous cells while leaving healthy tissue intact. This balancing act requires precise knowledge of the radiation dose administered to a patient. The workshop, organized by Fermilab's Arlene Lennox, gives participants the opportunity to discuss the protocols currently used in neutron dosimetry.

"There are only a few places in the world that offer neutron therapy," said Lennox. "The workshop presents a wonderful opportunity to learn from each other." The workshop takes place in Curia II and is open to interested members of the Fermilab community.
Workshop agenda (pdf)

Help Fermilab Clean Up
A volunteer at a past Fermilab cleanup
How can you improve the Fermilab environment and meet people from around the laboratory? By volunteering today at the first Third Thursday Lunchtime Cleanup of the year. Volunteers will beautify an area near Kirk Road starting at 11:45 a.m.

Volunteers at Third Thursday cleanups have improved many areas around Fermilab since the program began in 2000. Last year, Fermilab volunteers removed trash and debris from several roads and the areas around the Wilson Hall lakes.

"We started the cleanups after receiving calls from employees who said they'd be willing to volunteer," said Bob Lootens of Roads and Grounds. "We now average 15-18 people at each event."

Volunteers for today's cleanup will meet at 11:45 a.m. on the east side of the ground floor of Wilson Hall. Transportation to and from the cleanup site and a hot dog lunch at 12:30 p.m. will be provided. Please dress appropriately for the weather. For more information, contact lootens@fnal.gov or call x3303.

Accelerator Update
April 12 - April 14
- During this period of time Operations established one store that delivered approximately 12 hours and 25 minutes of luminosity to the experiments.
- Main Injector had a problem accelerating beam for a study
- Tevatron experts conducted many hours of studies

View the current accelerator update
View the Tevatron Luminosity Charts

In the News
From the New York Times, April 14, 2004:
Lines Drawn in Fight on N.S.F. Financing
by Michael Winerip
When Vernon J. Ehlers was a young physics professor at Calvin College in Grand Rapids, Mich., in the mid-1960's, he won a National Science Foundation grant to set up a summer institute for training elementary teachers in science. "I was surprised," he recalled recently. "At the time, I had no political connections. N.S.F. just liked the proposal, I guess."
read more

Fermilab Result of the Week
Precision Electroweak Measurements at CDF
Result of the Week Result of the Week
Example mass distributions from for W and Z bosons, reconstructed from muons and electrons respectively. (Click on images for larger versions.)
One of the four known forces in nature is the weak force, which provides the mechanism for nuclear fusion in stars and radioactive decays of heavier elements. The particle carriers of the weak force are W and Z bosons. These particles are heavy and short-lived, presumably due to their interaction with the Higgs boson field, although the Higgs itself has yet to be observed directly.

Even without direct observation, properties of the Higgs boson can be constrained within the Standard Model of Particles and Interactions, which predicts its existence. Precision measurements involving W and Z bosons improve these constraints. The most precise electroweak measurements come from large, clean samples of boson decays collected at high-energy electron-positron colliders. However, the larger samples currently being collected by the CDF and DZero experiments will improve these measurements.

Using the first 72 pb-1 of data collected in Run II, CDF has measured the inclusive cross sections for W and Z boson production in decay channels involving electrons and muons. The technical challenge is to control every detail of these analyses in order to keep systematic errors small. The CDF team has devised new techniques that lead to substantial improvements over previous measurements.

Of interest is the relative production rate (R) of W and Z bosons in Tevatron collisions. CDF reports a value of R = 10.93 +/- 0.15(stat) +/- 0.14(syst), precise to 2%. Based on this measurement, a number of fundamental electroweak parameters can be extracted, including an indirect measurement of the total decay width of the W boson, Gamma_W = 2072 +/- 40 MeV, slightly more precise than the current world average, and consistent with theoretical expectations.

The future of these measurement is bright. Similar results are expected from DZero in the near future, which can be combined with those reported here to further reduce measurement uncertainties. In addition, both collaborations have already collected and continue to collect even larger data samples which will lead to future improvements over the course of Run II.

Result of the Week
CDF electroweak cross-section group members include (left to right) Michael Schmitt and Victoria Martins (Northwestern), Eva Halkiadakis and Willis Sakumoto (Rochester), Aidan Robson (missing) and Giulia Manca (Liverpool). (Click on image for larger version.)
Result of the Week
Additional group members include (left to right) Greg Veramendi and Anyes Taffard (Illinois), Jian Kang (missing), Alexei Varganov (missing) and Ken Bloom (Michigan), and Eric James (Fermilab). (Click on image for larger version.)

Result of the Week Archive

Fermilab Film Series
The Fermilab Film Series presents Conte d'Automne (Autumn Tale) tomorrow at 8:00 p.m. in Ramsey Auditorium.
more information

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