Fermilab TodayThursday, September 14, 2006  

Thursday, September 14
2:30 p.m. Theoretical Physics Seminar - Curia II
Speaker: M. Piai, University of Washington
Title: Precision Electroweak Parameters from AdS-CFT
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4:00 p.m. Accelerator Physics and Technology Seminar - 1 West
Speaker: W. Hartung, Michigan State University
Title: R&D in RF Superconductivity at Michigan State University

Friday, September 15
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-over
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speakers: W. Molzon, University of California, Irvine; D. McGinnis, Fermilab
Title: A New Muon Beam and Experiment in Lepton Flavor Violation at Fermilab
8:00 p.m. Fermilab Film Society presents "Das Schreckliche Mädchen" (The Nasty Girl) in the Auditorium

Saturday, September 16
8:00 p.m. Art Series presents Tanahill Weavers in the Auditorium

Click here for a full calendar with links to additional information.

Weather Fog 75º/51º

Extended Forecast

Weather at Fermilab


Secon Level 3

Thursday, September 14
-Santa Fe Black Bean
-Sloppy Joe
-Stuffed Peppers
-Sauteed Liver & Onions
-Baked Ham & Swiss on a Ciabatta Roll
-Assorted Slice Pizza
-Crispy Fried Chicken Ranch Salad

Wilson Hall Cafe Menu

Thursday, September 14
-Puree Gloria
-Grilled Jumbo Shrimp
-Angel Hair Pasta Diavolo
-Sautéed Spinach w/Bacon
Wednesday, September 20

-Pastelon de Pollo
-Confetti Salad
-Tropical Fruit Platter w/Lime
Chez Leon Menu
Call x4598 to make your reservation.
Search the Fermilab Today Archive
Fermilab Today is online at: http://www.fnal.gov/today/

Send comments and suggestions to

Fermilab Today archive

Hurricane Relief Page

Fermilab Today PDF Version

Fermilab Result of the Week archive

Fermilab Safety Tip of the Week archive

Linear Collider News archive

Fermilab Today classifieds

Subscribe/Unsubscribe to Fermilab Today
A message from the medical office: Flu vaccines on hold
Due to circumstances beyond our control, the Fermilab Medical Office will not be able to administer flu vaccines until the end of October or middle of November.

The Fermilab Medical Office is recommending that employees take advantage of offers from their health care providers or receive a flu shot from the Visiting Nurse Association or the Public Health Department in the county they reside. It is especially important for those who are in the high risk category to be immunized as soon as the vaccine is offered. Sometime after October 1, 2006.

High risk individuals include employees who are age 65 or older and those who have health conditions such as heart disease, diabetes, kidney disease, asthma, cancer, HIV/AIDS or any other condition that causes a weakened immune system. As soon as the vaccine arrives the Fermilab Medical Office will offer the free flu clinics. The earliest clinic will probably be in mind-November.

In Memoriam
Maxwell L. Palmer
Former Fermilab engineer, Maxwell L. Palmer, age 85, died peacefully September 9, 2006, in Lehigh Acres, FL. He was one of the first employees (#18) at Fermilab, serving as project engineer for the linear accelerator and later as the head of the Mechanical Support Group. After his retirement from Fermilab in 1986, he designed medical accelerators. He will be remembered for spearheading whitewater canoe trips and canoe races around the main ring at Fermilab.

A memorial service will be held in Lehigh Acres, FL. He will be interred at the Florida National (VA) Cemetery, Bushnell, FL. You can contact his daughter, Joan Palmer, at 4718 Odana Road, Madison, WI 53711, or call 608/274-0555.

Spider's Journey: Elisa Rodriguez of the Accelerator Division recently snapped this picture of a spider. "I was remembering the days past," she writes, "I think the green will be leaving us pretty soon, in trade for Autumn."

In the News
ESO Press Release
September 12, 2006:

A "Genetic Study" of the Galaxy
Looking in detail at the composition of stars with ESO's VLT, astronomers are providing a fresh look at the history of our home galaxy, the Milky Way. They reveal that the central part of our Galaxy formed not only very quickly but also independently of the rest.

The Milky Way is a spiral galaxy, having pinwheel-shaped arms of gas, dust, and stars lying in a flattened disc, and extending directly out from a spherical nucleus of stars in the central region. The spherical nucleus is called a bulge, because it bulges out from the disc. While the disc of our Galaxy is made up of stars of all ages, the bulge contains old stars dating from the time the galaxy formed, more than 10 billion years ago. Thus, studying the bulge allows astronomers to know more about how our Galaxy formed.

To do this, an international team of astronomers [2] analysed in detail the chemical composition of 50 giant stars in four different areas of the sky towards the Galactic bulge. They made use of the FLAMES/UVES spectrograph on ESO's Very Large Telescope to obtain high-resolution spectra.

The chemical composition of stars carries the signature of the enrichment processes undergone by the interstellar matter up to the moment of their formation. It depends on the previous history of star formation and can thus be used to infer whether there is a 'genetic link' between different stellar groups. In particular, comparison between the abundance of oxygen and iron in stars is very illustrative. Oxygen is predominantly produced in the explosion of massive, short-lived stars (so-called Type II supernovae), while iron instead originates mostly in Type Ia supernovae [3], which can take much longer to develop. Comparing oxygen with iron abundances therefore gives insight on the star birth rate in the Milky Way's past.
Read More

Fermilab Result of the Week
Why antimatter does not matter
Allowed range (1-sigma) for the CP-violating phase δ φS and the decay rate difference ΔΓS resulting from the analysis of the Bs → J/ψ φ decay (dashed blue line), from muon charge asymmetry measurements (green region) and from the combined data (red line). (Click for larger version.)
Matter and antimatter behave in slightly different ways. This phenomenon, known as CP violation (CPV), is not often discussed in everyday life, but it is essential for explaining why the world around us is made of matter and contains almost no antimatter. Understanding the sources of CPV will shed light on the basic principles governing the universe.

The DZero experiment has recently reported several pioneering measurements aimed at finding evidence for CPV in Bs mesons, which are composed of beauty and strange quarks. In a perfectly symmetric world, the properties of the decays of Bs and anti-Bs mesons would be the same. DZero probes CPV by analyzing the time evolution of the relative orientation of particles emanating from a large sample of Bs mesons decaying into a pair of lighter mesons, the J/Ψ and Φ. In addition, DZero has searched for CPV by looking for a difference in the rates at which Bs mesons decay to positive or negative muons.

The combination of these measurements is presented in terms of a parameter "δ φS", which quantifies the amount of CPV observed. The above figure shows possible values of δ φS on the horizontal axis and possible values of another parameter related to the Bs system--the decay rate difference between two closely related incarnations of the Bs--on the vertical axis. The DZero measurements of these two parameters are shown as the red star with the corresponding uncertainty shown as the red contour. The value predicted by the Standard Model is shown as the black vertical line.

This is the first time an experiment has directly constrained CPV in the Bs system and has shown that it is not a new source of anomalously large CPV. Profiting from the excellent recent performance of the Tevatron, DZero plans to update these pioneering measurements with larger datasets and greater sensitivity in the near future.

Above: The following members of the DZero collaboration contributed to this analysis: (top row, from left) Daria Zieminska, Kostya Holubyev, Kin Yip, (bottom row, from left) Bruce Hoeneisen, Guennadi Borissov, and Avdhesh Chandra. Below: This CP violation measurement with the DZero detector is possible because of the excellent muon acceptance of the DZero detector and the periodic polarity switching of both the DZero superconducting solenoid and muon toroid magnet systems. Our DZero colleague Rich Smith, who died on 7/11/2006, is shown here working on the field measuring apparatus in the solenoid bore during July of 1998. Rich was deeply involved in all aspects of the DZero solenoid from design to operation.
 Result of the Week Archive

Accelerator Update
September 11 - 13
- Two stores provided 45 hours and 36 minutes of luminosity
- Recycler loses antiprotons due to power supply trip
- NuMI resumes taking beam
- TeV sector E48 separator spark
Read the Current Accelerator Update
Read the Early Bird Report
View the Tevatron Luminosity Charts
NALWO Picnic tomorrow
NALWO will hold a fall picnic on September 15, from 5:30 to 8:00 p.m. just outside the Kuhn Barn. Meet friendly lab families and join us for an evening of supper and games. Children are welcome; each family gets a Fermilab Frisbee. Please bring food to grill, and a dish to share among 8 people, such as a casserole, salad or side dish. NALWO will provide charcoal grills, plates and cutlery, soft drinks and desserts. For additional information, contact the Housing Office, 630/840-3777 or housing@fnal.gov; Rose Moore, 630/208-9309 or Christiane Albrow, 630/717-8906.

English Country Dancing
English country dancing will next meet on Sunday, September 24, at 2 p.m. in Kuhn Barn. The meeting date will change to the first Sunday of the month, beginning in November. Newcomers are welcome; partners and previous experience are not required. Please contact folkdance@fnal.gov or call 630-584-0825 or 630-840-8194.

Upcoming Activities

Fermilab Today
Security, Privacy, Legal  |  Use of Cookies