Wednesday, March 23, 2011

Have a safe day!

Wednesday, March 23
3:30 p.m.
4 p.m.
Fermilab Colloquium (NOTE LOCATION) - Auditorium
Speaker: Jonathan Feng, University of California, Irvine
Title: The WIMP Paradigm: Current Status

Thursday, March 24
2:30 p.m.
Theoretical Physics Seminar - Curia II
Speaker: Maxim Pospelov, Perimeter Institute
Title: Cleaning the SM Backyard – New Physics Below 1 GeV?
3:30 p.m.

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Wilson Hall Cafe

Wednesday, March 23

- Breakfast: English muffin sandwich
- Smart Cuisine: Cajun style lentil soup
- Cajun chicken ranch
- BBQ ribs
- Chicken parmesan
- Smoked turkey panini pesto mayo
- Assorted sliced pizza
- Chicken alfredo fettuccine

Wilson Hall Cafe Menu

Chez Leon

Wednesday, March 23
- Hearty vegetable lasagna
- Caesar salad
- Chocolate fondue

Friday, March 25
Guest Chef: William Wester
- Roasted butternut squash salad w/artisan goat cheese
- Pan-seared duck breast w/fig sauce
- Rice pilaf featuring Ojibwe wild rice
- Purple asparagus and french-style green beans w/toasted almonds
- Vegan chocolate cake w/warm chocolate ganache and fresh berries

Chez Leon Menu
Call x3524 to make your reservation.


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From symmetry breaking

Interesting effect at the Tevatron hints at new physics

Fermilab's Wilson Hall in the shape of a t, the symbol for the top quark.

Scientists are finding signs of new physics through the study of a particle Fermilab physicists discovered at the Tevatron, the top quark.

When top quarks and their anti-particles, anti-top quarks, are created in particle collisions at the Tevatron, detectors note the direction in which they fly. Theory predicts that the particles will favor one direction slightly over the other, traveling that way about 5 percent of the time more.

However, in studies by the DZero collaboration and the CDF collaboration, the particles seemed to be picky 15 percent of the time. Top quarks went forward and anti-top quarks went backward. This month, the CDF collaboration announced results with an even larger asymmetry.

They also recently released a study in which top quarks and their partners showed this unexpected behavior almost half of the time in collisions above a certain energy.

“It’s really challenging for us to construct a convincing theory to explain this,” said theorist Susanne Westhoff, who presented on the subject at the Rencontres de Moriond conference on Wednesday. “All of the proposed explanations involve a new particle.”

Scientists think the cause of the unexpected asymmetry could be the interference of an undiscovered particle, one just heavy enough to go undetected by the Tevatron. If that’s true, experiments at the recently restarted Large Hadron Collider may be just weeks from collecting enough data to find it.

The Higgs particle would not have this kind of effect, said physicist Fabrizio Margaroli, CDF top quark group leader, who presented the experimental results at the conference.

Read more

--Kathryn Grim

Video of the Day

Spotlight on CERN: Professor Michel Spiro

In this video, Professor Michel Spiro, scientific director of the CNRS in France and CERN Council president since 2009 discusses how CERN, a laboratory with a unique scientific challenge and an international collaboration, is managed. Fermilab plays a prominent role at CERN.

View Video

In the News

Fermilab to host Wonders of Science

From Daily Herald, March 22, 2011

High school teachers will take science out of the textbook and put it into children's hands at Fermilab's annual Wonders of Science event.

“The show is an excellent opportunity for families to share a fun time together while learning about science,” said Nancy Lanning of the Fermilab Education Office.

Award-winning high school teachers will perform fast-paced demonstrations on chemical and physical phenomena from 1 to 2 p.m. Sunday, March 27. Portions of the 24-year-old event have appeared on TV shows such as “Late Show with David Letterman,” “Inside Edition” and “CBS News.”

“This is one of our most exciting events every year,” said Spencer Pasero, an education program leader at Fermilab. “Everyone has their favorite demonstration, but there is always something new and exciting to look forward to.”

Read more

From the Computing Division

The benefits of software collaborations

Ruth Pordes

Ruth Pordes, associate head of the Computing Division for Grids and Outreach and executive director of the Open Science Grid, wrote this week’s column.

During the week of March 7, several people from Fermilab as well as our experiment collaborations attended the seventh annual Open Science Grid All-Hands Meeting. The meeting, which was hosted by the Structural Biology Group at Harvard Medical School, was a testament to the multidisciplinary nature of the OSG collaboration.

The Open Science Grid provides participating researchers access to a common, shared grid infrastructure that brings together computing and storage resources from campuses and research communities across the United States and beyond.

The Structural Biology Grid Consortium is an example of the OSG’s success. During the past year, the group has used more than 6 million computer processing unit hours across more than 20 university and lab sites on the OSG and published two papers – one of them in Nature. They were able to do their work using much of the same middleware software used by high-energy physicists.

The US ATLAS and CMS distributed facility groups also held their meetings during the OSG meeting. Rob Snihur, the US CMS Tier-3 support coordinator, felt that the meeting was a great way to bring together the physicists and site administrators to assess the experience of analyzing LHC data. A keynote during the meeting surveyed the big questions of the field of particle physics and suggested how the LHC could answer them. A set of panel discussions covered topics such as the national and global cyberinfrastructure and its future.

CDF collaborator Rick Snider appreciated hearing about the impact that the OSG has had on other science communities beyond particle physics. Those scientists now use common OSG mechanisms to manage peak load problems and provide computing power that would be prohibitively expensive without the OSG.

--Ruth Pordes

Safety Update

ES&H weekly report, March 22

This week's safety report, compiled by the Fermilab ES&H section lists no recordable incidents. A guest scientist tripped and fell at the airport while on business travel. First aid treatment.

Find the full report here.


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Martial arts classes begin April 11

Toastmasters - March 31

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Turkish Dance workshop Thursday, March 24

Creative Writers meet March 24

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2011 Co-Ed softball league

Free T-shirt for March gym memberships

FREE Intro to Argentine Tango classes start March 23 and 30

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School's Day Out: March 28 - April 1

Fermilab Arts Series presents "Reduced Shakespeare Company: Complete World of Sports, abridged" - April 2

ACU Offers $1,000 scholarship deadline April 25

Fermilab Arts & Lecture Series presents: dramatic reading of "Copenhagen" by Wheaton Drama - April 8

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