Fermilab TodayThursday, December 18, 2003  
Thursday, December 18
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over

Friday, December 19
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over

Thursday, December 18
Lentil soup
Cider glazed chicken breast w/red potatoes and mixed vegetables (low in sodium) $3.50
Pasta arrabiata w/fennel, kalamata olives and spicy Italian sausage $3.50
Smoked salmon w/a dill caper cream cheese and red onion w/wild greens $5.50
Grilled chicken Cordon Bleu sandwich w/smoked Virginia ham and Swiss cheese on a toasted Kaiser roll $4.75
Hand rolled Hanabi sushi

Eurest Dining Center Weekly Menu
Chez Leon
Weather Chance Flurries 28º/22º

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SDSS Press Release:
Visual "Mirages" Probe Distribution of Dark Matter
Sloan Digital Sky Survey
SDSS discovered a new gravitational lens that creates four images (A,B,C,D) of a quasar. (Photo courtesy SDSS)
Sloan Digital Sky Survey scientists have discovered a gravitationally lensed quasar with the largest separation ever recorded, and, contrary to expectations, found that four of the most distant, most luminous quasars known are not gravitationally lensed.

Albert Einstein's Theory of General Relativity predicts that the gravitational pull of a massive body can act as a lens, bending and distorting the light of a distant object. A massive structure somewhere between a distant quasar and Earth can "lens" the light of a quasar, making the image substantially brighter and producing several images of one object.
read more

Procurement is Ready for the Holidays
Procurement decorations
Procurement's Joyce Serritella stands proudly in front of her seasonal decorations. (Click on images for larger version.)
Procurement's Joyce Serritella goes all out when it comes to seasonal decorations. Visit the 4th floor on Wilson Hall to see the decorations for yourself.
Procurement decorations
Accelerator Update
December 15 - December 17
- Antiproton source broke old stacking record of 236 mA, achieving 245 mA
- Tevatron repairs continued

View the current accelerator update
View the Tevatron Luminosity Charts

In the News
From the Chicago Sun-Times, December 17, 2003
State's science labs could get funding boost
National civilian science labs and state research institutions across Illinois could be among the winners in a wide-ranging energy bill before Congress that could also help develop new coal technologies and hydrogen-powered cars.

The authorized funding for the U.S. Department of Energy's Office of Science would increase 65 percent by 2008, reaching $5.38 billion, under a provision sought by Rep. Judy Biggert (R-Ill.). The fate of the new funding provision is uncertain. The energy bill has passed the House but is stalled in the Senate.
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Fermilab Result of the Week
DZero Examines True Nature of New Particle
Mass difference of J/psi pi pi and J/Psi combinations as seen by the D0 collaboration. The top curve is for all production angles, whereas the lower curve is for a restricted angular range. In both cases, the peak at the left is the familiar psi(2S), and the one on the right is the X(3872). (Click on image for larger version.)
Analyzing data taken in Run II of the Tevatron, the DZero experiment sees evidence for the new particle dubbed the "X(3872)". In the top curve in the figure, two peaks are present. The large bump on the left corresponds to the well known psi(2s) particle, a bound state of c-cbar quarks, which was first observed in the 1970's. However, there appears to be a second peak at a higher mass.

This peak corresponds to the particle originally reported by the Belle collaboration, and recently confirmed by CDF. At this point, we don't know whether this particle is simply another c-cbar bound state or something more exotic, e.g., a loosely bound "molecule" of charm mesons. The lower curve in the figure shows the data for a range of production angles closer to the proton beam line, a previously unexplored region unique in DZero's coverage that may prove important in unraveling the properties of the new particle.

The DZero experiment is currently re-processing its data, and will soon have available twice as large a sample of these events to study. This larger sample and the acquisition of future data will help elucidate the true nature of this particle. Sally Dawson, senior theorist at Brookhaven National Laboratory, points out, "X(3872) is an exciting discovery, since it doesn't quite fit into conventional models".

Brad Abbott Guennadi Borissov
Brad Abbott (left), University of Oklahoma, has worked on the analysis of the X state. Guennadi Borissov, Lancaster University, UK has made significant contributions to our track recognition and reconstruction algorithms as well as B analysis code.
Result of the Week Archive
Virtual Ask-a-Scientist Tonight
Fermilab will host the next Virtual Ask-a-Scientist on Thursday, December 18 from 7:00 p.m. to 9:00 p.m. The featured scientists will be Matt Malek of Fermilab's Particle Physics Division and DZero experimenter Vivek Jain, Brookhaven National Laboratory. Interested participants may join the online chat session on the evening of December 18 from Fermilab's homepage.
more information

SPIRES HEPJobs Database
The Fermilab Library manages the SPIRES HEPJobs database. This lists jobs in particle physics and astrophysics from all over the world, and allows people to search for jobs in a variety of ways (country, field, rank). The jobs are checked every two months to ensure the positions are still open. The HEPIC Employment Opportunities service has recently merged with the SPIRES HEPJobs database so that people on the HEPIC jobs mailing list will still receive regular emails concerning new jobs. If you have any questions please contact Celina Paul.

Form W-4
Have you purchased, sold or refinanced your home, married, divorced, or had a new addition to the family? These are just some of the reasons why you may wish to provide payroll with a new W-4 exemptions form for 2004. These forms are available in the Payroll Department, or at the IRS web site; or go to the Business Services - Accounting web page and use the Federal Forms Link.

Fermilab Merchandise
You can buy Fermilab shirts, hats, sweatshirts, science toys and books as holiday gifts! Visit the Lederman Science Education Center between 9:00 am and 4:30pm, or its website. If you have questions, call Carol, x8258.

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