Thursday, January 20|
2:30 p.m. Theoretical Physics Seminar - Curia II
Speaker: A. Pierce, Stanford Linear Accelerator Center
Title: The Cosmology of Split Supersymmetry
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
THERE WILL BE NO ACCELERATOR PHYSICS AND TECHNOLOGY
Friday, January 21
3:30 p.m. DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4:00 p.m. Joint Experimental Theoretical Physics Seminar - 1 West
Speaker: H. Park, University of Michigan
Title: The Decay sigma+ --> p muon+muon-
and Possible New Physics from HyperCP
8:00 p.m. Fermilab Public Lecture Series - Auditorium
Detecting Nature's Mysterious Particles:
How Particle Physics Detectors Work and What They Really See
Speaker: Herman White
Sunday, January 23
2:30 p.m. Gallery Chamber Series - 2nd Floor Art Gallery
Thursday, January 20|
Grilled Chicken Cordon Bleu Sandwich $4.75
Chicken Marsala $3.75
Maryland Crab Salad $4.75
Italian Sausage Calzones $3.25
SW Chicken Salad with Roasted Corn Salsa $4.75
Wilson Hall Cafe Menu
Chez Leon will be closed through January and February
Site Security Change|
Questions and Answers|
Q: If I forget my Fermilab ID badge, will the security officer let me in?
A: Yes, the security officer will check another photo ID (driver's
license for example) and let you in.
Q:If I arrive in a limo after "public" hours, can the limo driver enter
by the east gate?
A: Yes, the driver will be on a business-related activity and will
be admitted at the east gate. Limo drivers can now enter at either gate
to pick up employees also. Security should be notified of after-hours
Q: If visitors plan to visit non-public areas of Wilson Hall, do they
need visitors' passes?
A: Members of the general public will not be allowed in other areas
of Wilson Hall. If a visitor has a business purpose (a meeting with an employee,
for example) he or she will be able to access the non-public areas without a
Changes in Fermilab Security
Dane Skow Transfers to PPDG|
In the "world of tomorrow," computers everywhere will interact with
each other over an electronic grid without human supervision
or intervention. This scenario is what Dane Skow of
the Particle Physics Data Grid is hoping for, anyhow.
On December 1, Skow transferred from the Computer Security Team,
where he had worked for three years, to the PPDG, where as the Technical
Coordinator he plans to work with Ruth Pordes, of the Computing Division,
and other collaborators
to build on the success of the early computer grids. About a year ago, the
four-year-old PPDG, along with the GriPhyN and iVDGL projects, formed the
Grid 3 project, to see if the idea of a federating grids would work.
"That initial success of Grid 3 encouraged the idea of an Open Science Grid,
which is an open consortium for anyone to get involved," Skow said.
"It's similar to the EEGE activity in Europe, and we hope to deploy an
infrastructure so that places funded by the DOE, NSF, NIH, DOD, NASA,
etc. can all share resources and have access to each other's data and tools.
We're pushing the Web to the next level, where instead of people communicating,
computers are interacting with each other independently."
Skow said he hopes that the Open Science Grid will be going live on March 1. Meanwhile,
Mark Leininger has taken over as leader of the
Fermilab computer security team, Skow still serves as the deputy to Vicky
White of Fermilab's Computing Division as Computer Security Executive,
and he hopes to work on the CMS experiment as a scientific collaborator.
"We're at the beginning of something here that could have an effect
on our society like the Web did, something that could impact businesses
and the rest of people's lives," he said.
January 18-January 19|
- During this 48 hour period, Operations established two stores that
provided approximately 40 hours and 40 minutes of luminosity to the
- On Monday, the TeV set a New Luminosity Record of 104.96E30.
- On Monday, the Antiproton Source set a New Stacking Record with a
rate of 14.94 mA per hour.
- NTF has a problem with the power supply and magnet cabling for its
32-degree bend magnet.
Read the Current Accelerator Update
Read the Early Bird Report
View the Tevatron Luminosity Charts
From The Guardian Unlimited, January 20, 2005|
100 years after Einstein changed physics for ever, Alok Jha visits a leafy corner of Princeton to meet his intellectual heirs - still hunting for a theory of everything
Edward Witten is so softly spoken that his voice sometimes threatens to drift away completely. His desk is a jumble of papers and his blackboard a mess of equations. But his hushed words come straight to the point and are infused with understanding and passion.
How Many Beauty Quarks Does the Tevatron Make?|
The beauty (bottom) hadron production spectrum as a function
of beauty hadron transverse momenta. The crosses with error
bars are the data with experimental uncertainties. The
solid line is the central theoretical values and the dashed
line is the theoretical uncertainty. (Click on image for larger version.)|
Although the beauty (or bottom) quark was discovered in 1977
at Fermilab, until last year the production of beauty
particles in the proton-antiproton collisions at the
Tevatron was not well understood. The Run I measurements
made by the CDF and DZero collaborations using limited region
of the production spectrum were higher than the theoretical
expectations by more than a factor of two.
For this measurement, particles (hadrons) containing a
beauty quark were detected through a decay channel that
includes a J/psi particle, a bound state of charm and
anti-charm quarks. A team of researchers from CDF has
analysed a data sample selected from over a million
reconstructed J/psi particles which decayed to two muons.
CDF's precision silicon vertex detector was used to separate
J/psi mesons produced directly in the proton-antiproton
collisions from those produced from the decays of long-lived
The inclusive J/psi production spectrum as a function of
J/psi momentum transverse to the beam direction integrated
over the rapidity range |y|< 0.6 is plotted as points with
error bars indicating experimental uncertainties. The
hatched histogram indicates the contribution to the J/psi
production spectrum from prompt (direct) production. The
cross-hatched histogram is the contribution from decays of
beauty hadrons. (Click on image for larger version.)|
The team has measureed the inclusive J/psi production
spectrum in the central region of the CDF detector over the
whole transverse momentum range. From the spectrum of
displaced J/psi mesons they then measured the total
production spectrum of beauty hadrons. This is the first
measurement of this spectrum for all momenta.
The number of beauty hadrons produced in the central region
of the CDF detector is in good agreement with the recently
revised theoretical calculations. These results were
accepted this week to Physical Review D for publication.
The authors of this PRD publication made significant
contributions to the CDF Silicon Vertex Detector, Central
Tracker, Muon Chambers and the Trigger system. From left:
Greg Field (Yale) Ting Miao (Fermilab) Tom LeCompte
(Argonne) Mary Bishai (Fermilab) Slawek Tkaczyk (Fermilab)
Jim Kraus (UIUC) Lee Pondrom(U. Wisconsin, Madison) Yuri
Gotra (U. Pitt.) Not shown: Jonathan Lewis and Dmitri
Litvintsev (Fermilab), Sham Sumorok (MIT). (Click on image for larger version.)|
Result of the Week Archive
Herman White Presents Fermilab Public Lecture Tomorrow|
The Fermilab Public Lecture Series presents Herman White this Friday at 8:00 p.m.
in Ramsey Auditorium. White will give the talk, "How Particle Physics Detectors Work and What They Really See."
Tickets are $5.00.
Rhythm & Blues Musical with Fermilab Connections
A new rhythm & blues musical with music by Jamie Ellis of
Geneva and book and lyrics by former Fermilab physicist Steve
Delchamps is going to be presented at Steel Beam Theatre in St. Charles during
February. The engagement is limited to two weekends:
Friday, Saturday, and Sunday the 11-13th and
Friday and Saturday the 18th and 19th.
For reservations, people should call Steel Beam Theatre at 630-587-8521.