Fermilab TodayThursday, January 15, 2004  
Thursday, January 15
2:30 p.m. Theoretical Physics Seminar - Curia II
Speaker: O. Mena, Fermilab
Title: Puzzling Out Neutrino Mixing through Golden and Silver Measurements
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over

Friday, January 16
3:30 p.m. Wine & Cheese - 2nd Flr X-Over
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speaker: P. Cushman, University of Minnesota
Title: Muon g-2: E821 Final Results and Prospects for the Future
8:00 p.m. Fermilab International Film Society - Auditorium
Title: The Awful Truth
Tickets: Adults $4.00

Thursday, January 15
Wild Mushroom Bisque
Beef burgundy w/wild mushrooms over egg noodles $3.50
Honey mustard glazed salmon fillet w/two market sides $4.75
Roast beef w/roma tomato, basil and fresh mozzarella w/side salad $4.75
The High Rise: A double patty burger w/shredded lettuce, Thousand Island, pickles and cheese 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 Chance Snow 24º/17º

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Secon Level 3

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Ropes in front of Wilson Hall
One of the ropes in front of Wilson Hall
Learning the Ropes
You may be wondering about the maze of ropes in front of Wilson Hall this winter. No one is watching you from the 15th floor, and there is no hidden piece of cheese. It's all for your own safety.

The stairs and patio in front of the building have pipes carrying hot water embedded in them to melt snow and ice automatically. This system was upgraded during the renovations two years ago. The pipes don't run under the whole paved area--just the middle section. Keeping the flanks ice-free all winter using snow shovels requires too much manpower, so the area is cordoned off.

The pipe system can handle all but the most extreme conditions. "The snowstorms are the variables," said Vic Kuchler, Deputy Head of the Facilities Engineering Services Section. "They're always the wild card." And so, for the worst of times, the salt and shovels still come in handy.

Accelerator Update
January 12 - January 14
- Tev quenches continued.
- Operations established 1 store during the last forty-eight hours. They delivered approximately eleven hours and fifteen minutes of luminosity to the experiments.

View the current accelerator update
View the Tevatron Luminosity Charts

In the News
From the New York Times, January 14, 2004
Tests Suggest Scientists Have Found Big Bang Goo
By James Glanz
At least three advanced diagnostic tests suggest that an experiment at the Brookhaven National Laboratory has cracked open protons and neutrons like subatomic eggs to create a primordial form of matter that last existed when the universe was roughly one-millionth of a second old, scientists said here on Tuesday.
read more

From the New York Times, January 13, 2004
Newly Found State of Matter Could Yield Insights Into Basic Laws of Nature
By James Glanz
A fleeting, ultradense state of matter, comparable in some respects to a bizarre kind of subatomic pudding, has been discovered deep within the core of ordinary gold atoms, scientists from Brookhaven National Laboratory said at a conference here Monday.
read more

Fermilab Result of the Week
New Technique Yields Most Precise Measurement of Top Quark Mass
The solid line represents a Gaussian fit of the top mass. The most likely mass of the top quark is 180.1 GeV/c2, and the hatched band indicates the +/- 3.6 GeV/c2 statistical uncertainty on the fit and on the extracted mass. (Click on image for larger version.)
The Standard Model of particle physics has about two dozen parameters, with most referring to quark and lepton masses. The mass of the top quark, in particular, reflects some of the crucial aspects of the Model. This is because top is supposed to be point-like and massless; yet, through its interactions with a Higgs field that is thought to permeate the universe, the mass of top is about the mass of a gold nucleus. In the Model, the mass of top is correlated with the mass of the Higgs. Improved precision measurements of the top mass limit the theoretically allowed range of values of Higgs mass.

An approach developed at DZero, made possible by the more powerful computers that were not available for previous analyses, extracts information from the data through a direct comparison of all measured variables in an event. Using a formula that describes the production process, it results in a reduction in statistical uncertainty that corresponds to a factor of 2.4 increase in the size of the data sample. This measurement of the top mass is as accurate as all previous measurements combined and suggests a Higgs mass a bit larger than previously thought.
Result of the Week Archive

(L-R) Juan Estrada (Fermilab), Florencia Canelli (UCLA) and Gaston Gutierrez (Fermilab) are responisble for this new measurement of the top mass, and have also contributed extensively to the construction of the Central Fiber Tracker for Run II. Florencia's and Juan's PhD theses at the University of Rochester were based on these novel analyses of data from the first run of the DZero detector.
Weekly Times Sheets Due Tomorrow
Due to the upcoming Martin Luther King Holiday on January 19, 2004, weekly time sheets are due in Payroll by 10:00 a.m. on Friday January 16, 2004.

Missing Book Returned!
The Fermilab library is happy to report that Developing the Horizons of the Mind: Relational and Contextual Reasoning and the Resolution of Cognitive Conflict by K. Helmut Reich has been returned.

Lederman Science Center Holiday Hours
The Lederman Science Center will be open to the public on Monday, January 19th from 9:00 a.m. to 3:00 p.m.

New Office Location
The Training and Development Department has moved its offices from the Training Center on Road A-1 to the 15th floor of Wilson Hall. The new mail station is 107.

Fermilab Film Series Tomorrow
The Fermilab Film Series will present "The Awful Truth" tomorrow at 8:00 p.m. in the Fermilab auditorium. Tickets are $4.00 for adults.
more information

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