Friday, April 13, 2012

Have a safe day!

Friday, April 13
11 a.m.
Particle Astrophysics Seminar - Curia II
Speaker: Matthew Evans, Massachusetts Institute of Technology
Title: Large Scale Interferometry - the Challenges of Advanced LIGO
2 p.m.
Accelerator Controls Seminar - One West
Speaker: Dennis Nicklaus, Fermilab
Title: Front End Framework (FEF); a Linux Framework with C/C++ and Erlang Interface
3:30 p.m.
4 p.m.
Joint Experiment-Theoretical Physics Seminar - One West
Speaker: Chris Polly, Fermilab
Title: Fermilab's Muon Campus at the Intensity Frontier

Monday, April 16
2:30 p.m.
Particle Astrophysics Seminar - Curia II
Speaker: Peter Nugent, Lawrence Berkeley National Laboratory
Title: Observations of a Type Ia Supernova Within Hours of Explosion in the Pinwheel Galaxy
3:30 p.m.
4 p.m.
All Experimenters' Meeting - Curia II

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a weekly calendar with links to additional information.

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Secon Level 3

Wilson Hall Cafe

Friday, April 13

- Breakfast: Chorizo burrito
- New England clam chowder
- Carolina burger
- Tuna casserole
- Dijon meatballs over noodls
- Bistro chicken & provolone panini
- Assorted sliced pizza
- Brazillian burger w/ chimichurri
Wilson Hall Cafe Menu

Chez Leon

Friday, April 13
- Spanakopita
- Grilled lamb chops
- Oregano cubed potatoes
- Gigantes (greek lima beans)
- Karidopita

Wednesday, April 18
- Southern California crepes
- Spicy chicken
- Tomato & avocado salad
- Chocolate fondue w/ fresh fruit

Chez Leon Menu
Call x3524 to make your reservation.


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Special Announcement

LBNE reconfiguration workshop - April 25-26

A workshop on the reconfiguration of the Long-Baseline Neutrino Experiment will take place April 25-26 at Fermilab. All interested parties are invited to attend. The workshop will inform the community about and seek input for the reconfiguration study. The workshop is organized by the LBNE reconfiguration steering committee as part of the response to Office of Science Director Brinkman's charge to Fermilab to find a path forward to reach the goals of LBNE in a phased approach. The committee, led by Deputy Director Young-Kee Kim and including many LBNE stakeholders, will prepare a preliminary report to DOE by June 1.


Fermilab brings energy into art

This watercolor by Vesna Jovanovic, titled "Timespans," is now on display in the Fermilab Art Gallery. Image courtesy of Vesna Jovanovic

Editor's note: The artist reception for the exhibit "Potential Energy" will take place today from 5 to 7 p.m. in the Fermilab Art Gallery.

This spring, the Fermilab Art Gallery diverged from its typical invitation-only exhibits and hosted a juried show that features work from local artists centered on a single theme: potential energy. The show will run until May 9.

"The juried show gives less well known artists who may not have enough pieces to fill a gallery the opportunity to showcase their work," said Fermilab art curator Georgia Schwender. "It also lets us see how different artists interpret a single theme."

This exhibition is part of a collaboration with the Water Street Studios and The Gallery at Allen+Pepa to showcase pieces that depict three different manifestations of energy: potential, kinetic and mechanical. Each gallery will focus on a different type of energy, with the Fermilab Art Gallery starting off the series with potential energy themed pieces.

Local artist Kai Schulte visited Fermilab several times when he first moved to Illinois from Germany. He created a metal sculpture entitled "Visual Higgs Boson" specifically for this exhibit. The sculpture gives form to the elusive "god particle" in a way that figures and graphs cannot.

"The whole idea of particle accelerators and physics is fascinating," Schulte said. "When I heard about this show, it gave me the opportunity to create something I have always wanted to create."

Chicago-based artist Vesna Jovanovic, who submitted the piece "Timespans" to the exhibit, has always been intrigued by art and science. She double majored in chemistry and art during her undergraduate studies.

Read more

—Sarah Charley

Photo of the Day

Fermilab's sun-streaked sky

Fermilab employee Bridgett Thomson captured the sunrise by the west security gate. Photo: Bridgett Thomson, FESS
In the News

Sparks Fly Over Shoestring Test Of 'Holographic Principle'

From Science, April 12, 2012

A team of physicists says it can use lasers to see whether the universe stores information like a hologram. But some key theorists think the test won't fly.

The experiment looks like a do-it-yourself project, the scientific equivalent of rebuilding a 1983 Corvette in your garage. In a dimly lit, disused tunnel here at Fermi National Accelerator Laboratory (Fermilab), a small team of physicists is constructing an optical instrument that looks like water pipes bolted to the floor. Three scientists huddle within a makeshift tent—really a plastic sheet the size of a tablecloth—to install a high-precision mirror. Nitrogen from a tank flows under the plastic to keep the mirror clean. "It doesn't look very impressive, but it's the equivalent of a class 100 clean room—the best you can buy," says Craig Hogan, a theorist at Fermilab and the University of Chicago in Illinois.

Read more

In the News

'God particle' physicist Leon Lederman honored by National Science Foundation

From Medill Reports, April 11, 2012

"What makes you say, 'Thank God it's Monday,' instead of 'Thank God it's Friday'?

For Nobel laureate Leon Lederman, the answer to his question has always been science, from discovering subatomic building blocks of matter to heading the Fermi National Accelerator Laboratory in Batavia. Science grabbed him as a youth, defined him growing up, and guided him to the mysteries of physics - a field he ultimately helped redefine as a man.

"He's driven by science and a love of transmitting it. He's very keen on motivating the brightest people to pursue science as an exciting field," said physicist Jeffrey Appel, a long-time colleague and friend of Lederman.

His book, "The God Particle," reads like an adventure novel about the search for the elusive Higgs boson, theorized to give mass to matter.

Read more

CMS Result

Hidden in time loops

In the above reaction, a bottom quark (b) and a strange quark (s) transform into two muons (μ) by way of a loop involving a top quark (t), two W bosons (W), and a neutrino (ν). Part of this loop goes backward in time.

Many particles created in proton collisions are short-lived, measuring their lives in trillionths of a trillionth of a second. Scientists reconstruct them from the trajectories of their remnants. But some particles are even more transient than that. They live and die entirely within a reaction - their brief existence is just a step in the transformation of the colliding particles into their remnants.

As a bizarre consequence of quantum mechanics, these ephemeral particles can even travel backward in time. Normal particles trace lines through space and time that are always forward in the time direction. A particle in the midst of a collision can actually trace a loop, connecting its birth with its death, but only if it can't be observed.

Consider the diagram above. Two quarks, bottom and strange, collide and result in two muons. To satisfy conservation laws, a top quark, two W bosons and a neutrino must be created and destroyed in a sequence that ends with the last one begetting the first. The fact that the collision had far too little energy to create the mass of a top quark or even a W boson does not make this reaction impossible— it only makes it rare.

With no hard limit on the mass of the participants, anything could be running around the loop, even undiscovered particles and particles that are too massive for the LHC to directly create. These strangers would be noticed by their effect on the probability of the reaction: if there are more particles willing to help a bottom and a strange quark become two muons, it could happen more often.

If only known particles contribute, this reaction would be extremely infrequent— only a few bottom-strange encounters per billion would result in a pair of muons. That just makes it easier to see the effect that new particles would have. It's easier to see a flea riding an ant than a flea riding a horse.

CMS scientists are searching for this kind of reaction with ever-increasing precision. Recently, they published a measurement sensitive to eight parts per billion. While the reaction hasn't been definitively observed yet, this year's dataset should be large enough to see it even if there are no new particles. We are sure to see the ant; time will tell if it has a rider.

Jim Pivarski

The U.S. physicists pictured above contributed to this analysis as part of an excellent international team of scientists.
The CMS Communication Group is responsible for both communication among physicists and communication with the public.
Accelerator Update

April 6-9

- Booster, Main Injector and Muon Ring personnel conducted studies
- FTBF experiment T-992 took beam
- SeaQuest continued to commission their beamline
Read the Current Accelerator Update
Read the Early Bird Report
View the Tevatron Luminosity Charts


Latest Announcements

Blood drive - April 16-17

Road closure near CDF building beginning April 17 offers Mother's Day discount

Artist reception - today

NALWO and Fermi Garden Club plant and seed exchange - April 14

Barn dance - April 15

Chicago Fire soccer - April 15 and May 12

Cholesterol Management class deadline - April 16

Fermilab summer day camp registration deadline - April 16

Heartland blood drive - April 16-17

NALWO buffalo barn tour and luncheon - April 26

NALWO spring tea - May 10

Argentine Tango classes - first class free

Dragon II restaurant employee discount

Women of Fermilab - softball league

Changarro restaurant offers 15 percent discount to employees

Monday night golf league

Scottish country dancing meets Tuesday evenings in Kuhn Village barn

International folk dancing meets Thursday evenings in Kuhn Village barn

Argentine tango classes at Fermilab

Fermilab Golf League

2012 CTEQ-Fermilab school on QCD and electroweak phenomenology

Fermilab Management Practices courses are now available for registration

Indoor soccer

Atrium construction updates

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