Thursday, July 8|
2:30 p.m. Theoretical Physics Seminar - Curia II
Speaker: W. Lee, Seoul National University
Title: Calculating e`/e Using Staggered Fermions
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4:00 p.m. Accelerator Physics and Technology Seminar -
Speaker: J. Weisend, Stanford Linear Accelerator Center
Title: A History of TESLA Cryomodule Design and Operation
Friday, July 9
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
THERE WILL BE NO JOINT EXPERIMENTAL THEORETICAL PHYSICS SEMINAR THIS WEEK
Thursday, July 8|
Tomato Florentine soup
Grilled Chicken Cordon Bleu Sandwich $4.75
Chicken Marsala $3.75
Maryland Crab Salad $4.75
Italian Sausage Calzones $2.75
SW Chicken Salad with Roasted Corn Salsa $4.75
Wilson Hall Cafe Menu
New Peak Luminosity Record|
At 11:30 p.m. on Tuesday, the Tevatron hit a new peak luminosity of 9.2 E31.
The Tevatron achieved the last record of 8.5 E31 on June 21.
Revisions in Performance Review Process|
From December to April the Lab Services Section asked employees and supervisors
for feedback on the 2002-03 performance review process. LSS managers received
comments from hundreds of employees and supervisors through focus groups,
phone calls and one-on-one conversations. More than 200 employees took the
time to fill in and submit a feedback form. "Employees and department heads
surprisingly had the same views," said Kay Van Vreede, head of LSS. "People
were positive about the goal-setting procedure that we introduced. Most
employees felt they now play a more active role in the review process
and that they communicate more with their supervisors about expectations
and accomplishments. Both employees and supervisors also made similar
suggestions for improvements. The forced-averaging system was the area
of greatest dissatisfaction."
This week a letter from Director Mike Witherell will go out to all
employees with a summary of the feedback received. The letter also
outlines revisions, such as replacing the number rating system with
descriptive words. The letter describes these and other changes.
The revisions apply to the 2003-04 performance evaluation and the goal-setting
for the 2004-05 review period. Here are some of the steps to be taken by
employees and supervisors in the next several months:
A more detailed timetable is available on-line.
Employees and supervisors can download revised forms
from the LSS website.
The LSS Training and Development Department offers training courses in the writing
of accomplishment reports, goal setting and the performance review
conversation. If you have any questions regarding training, please
call Barb Brooks at x5021. If you have questions about the review
process, contact Kay Van Vreede at x3396 or Cindy Crego at x3278.
- Within the next 2 weeks: employees write accomplishment reports and submit them to their supervisors.
- Before the end of July: supervisors write performance reviews and submit overall performance ratings.
- By August 1: supervisors and employees begin goal discussions for the new review period.
- September through October: Supervisors and employees discuss performance for the past review period.
Fermilab Arts Series: Two-for-One Ticket Voucher with Savoy-Doucet Ticket Order|
The Fermilab Arts Series has a special offer for patrons of this Saturday's
concert. With your order of tickets for the July 10 show of the
Savoy-Doucet Cajun Band, you will receive
a two-for-one ticket voucher for the July 31 concert by Free Flight,
featuring jazz flutist Jim Walker. If you've
already purchased your tickets for Savoy-Doucet, feel free to phone (x2787)
or stop by our box office located in the User's Office to pick up your
voucher. Please note that the offer is per Savoy-Doucet ticket order, not
The Savoy-Doucet Cajun Band plays honed-down, hard-core Cajun music with an
earthy sensuality. The band includes Michael Doucet, who won a Grammy award
with Beausoleil; Ann Savoy, who appeared in the film "Divine Secrets of the
Ya Ya Sisterhood;" and Marc Savoy, who received the National Heritage
Fellowship Award - the highest honor in the country for traditional artists.
The band has traveled the world, appearing in many prestigious venues such
as the Newport Folk Festival, the Berlin Jazz Festival, the Festival of
American Fiddle Tunes at the Smithsonian, and Queen Elizabeth Hall in
Savoy Doucet Cajun Band performs in Ramsey Auditorium on Saturday, July 10
at 8 p.m. Tickets are $16 adults, $8 ages 18 and under. For tickets, call
630-840-2787 or stop by the box office from 9-4 (closed for lunch) located
next to the User's Office in Wilson Hall.
From the Institute of Physics, July 6, 2004|
Physicists offer science communicators £1500 for Einstein Year
Today, the Institute of Physics announced its largest ever grant scheme, with individual cash awards of up to £1500 so that local science teachers, enthusiasts or organisations can hold an event or activity during Einstein Year (2005) that helps make physics interesting and relevant to the general public.
Matter Oscillating into Anti-Matter and Back Again|
The normalized difference
between the number of mixed and unmixed B mesons as a function of time.
If there was no mixing, all points would fall on a straight line. The B
mesons are reconstructed using their decay products: a muon and a D* meson.
DZero tags the flavor of B meson (i.e. determine if it was B or anti-B) at
production by looking at the sign of decay muon from the second B meson
present in the event. (Click on image for larger version.)|
One amazing property of the neutral Bd meson, consisting of a
b-quark and d-antiquark, is that it can spontaneously become
(or oscillate into) its own anti-particle, i.e., become an anti-meson
which contains a b-antiquark and a d-quark, and back again. This phenomenon
was first observed in the 80's, and everyone was surprised by the large
probability of oscillation. In fact, this large value implied that the top
quark would have to be very heavy which was confirmed by the 1995 discovery of
the top quark at Fermilab with a mass of about 180 times that of a proton.
Such oscillations are characterized by a frequency called Delta Md,
which has been measured by experiments operating at different accelerators
around the world, including DZero. Our result is Delta Md =
0.506 +/- 0.055(stat) +/-0.049(syst) ps-1, and is one of the more
precise measurements made by experiments at Fermilab. (The number means
that the meson oscillates more than 100 billion times in a second.)
Our measurement gives us confidence we can make a similar measurement
for the neutral Bs meson (containing a b-quark and a s-antiquark).
of Columbia University
has been examining
B mixing in DZero.
At present, the Bs meson can only be studied at Fermilab.
Experimental as well as theoretical evidence indicates that the Bs meson
oscillates about 30 times faster than the Bd, almost all Bs
mesons will turn into anti-mesons in a fraction of a trillionth of a second.
Measuring this parameter is of the utmost importance, since a deviation from
predictions could point to some new force or interaction unexpectedly
lurking around the corner.
Alan Jonckheere (right) and Fritz Bartlett are key contributors to the online and computing systems, which are used to collect and analyze the data for this and all other DZero results. (Click on photo for larger version.)|
Result of the Week Archive
July 5 - July 7|
- During this 48 hour period Operations established one store that added to an existing store provided approximately 32 hours and 47 minutes of luminosity to the experiments.
- Linac beam suffered from LRF5 water problem
- Booster suffered from BRF12 problems
- Store 3621 set NEW LUMINOSITY RECORD with 92.1E30
- TeV store 3621 lost due to a quench
View the current accelerator update
View the Tevatron Luminosity Charts
Fermilab Golf League Outing|
The Fermilab Golf League is sponsoring a Golf Outing at the
Tamarack Golf Club in Naperville next Friday, July 16, at 1:30 p.m.
Everyone is welcome to play. There will be games and prizes for golfers
of all skill levels. The cost is $59.95.
Fermilab Rocket Club
The Fermilab Association if Rocketry is
having its next monthly club launch on July
10, 2004 from noon until 4:00 p.m. The club
plans to launch many big high power rockets.
There will also be a raffle for a rare Estes Saturn V
flying model rocket kit. Anyone can enter the
raffle. The winner will be selected between
2:30 p.m. and 3:00 p.m.
Dave Herzog's Marionette Show
The Fermilab Recreation Office presents the Dave Herzog Marionette Show,
which will be held in the upper level of Kuhn Barn on July 16 at noon.
For 28 years, Dave has performed thousands of shows for audiences nationwide.
Dave is a frequent performer at Navy Pier. Not only does Dave perform but he
also hand crafts all his marionettes. This event is open to all Fermilab employees,
visitors and on-site contractors and their children. This event is
free. All we ask is that you do not arrive late. If your spouse is
coming from off-site you must notify security.