Friday, May 3, 2013

Have a safe day!

Friday, May 3

2 p.m.
Computing Techniques Seminar - One West
Speaker: Brian Bockelman, University of Nebraska, Lincoln
Title: Lark Brings Distributed High Throughput Computing to the Network

3:30 p.m.

4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speaker: Surjeet Rajendran, Stanford University
Title: Cosmic Axion Spin Precession Experiment (CASPEr)

Monday, May 6

2:30 p.m.
Particle Astrophysics Seminar - One West
Speaker: Neal Dalal, University of Illinois
Title: Probing Dark Matter Substructure with Dusty Galaxies

3:30 p.m.

4 p.m.
All Experimenters' Meeting - Curia II
Special Topics: Proton Improvement Plan; Detector R&D; Computing Load Shed Plan for Summer 2013

Click here for NALCAL,
a weekly calendar with links to additional information.

Ongoing and upcoming conferences at Fermilab


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Wilson Hall Cafe

Friday, May 3

- Breakfast: Mexican omelet
- Pozole
- Chorizo and potato pambazo
- Chicken mole
- Smart cuisine: herb and lemon fish
- Mexican ham torta
- Assorted pizza by the slice
- Burrito platter

Wilson Hall Cafe menu
Chez Leon

Friday, May 3

Wednesday, May 6
- Apple- and horseradish-glazed salmon
- New potatoes with dill
- Roasted broccoli
- Lemon cake

Chez Leon menu
Call x3524 to make your reservation.


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In Brief

DASTOW 2013 scheduled for Friday, June 21

Children enjoy the FUNdamentals of Physics Show at DASTOW 2012. Photo: Cindy Arnold

School-aged children of Fermilab employees and users can see physics up close on Friday, June 21, when they visit Fermilab for Daughters and Sons to Work (DASTOW) day.

Enjoy traditional favorite activities, including Mr. Freeze's cryogenics show, the FUNdamentals of Physics show, a demonstration of skills and safety by the Fermilab Fire Department, and lunch in the Wilson Hall atrium.

New to this year's festivities is the Fermilab's Children Art Show, sponsored by NALWO, in the Wilson Hall atrium. For more information about how to sign up to showcase your child's or children's artwork, visit the art show Web page.

Exposing children to the workplace is an excellent way to show them the value of education, help them understand what their parents or relatives do at work, and get them thinking about future career options.

This year, DASTOW is scheduled on a Friday from 8:30 a.m. until 12:30 p.m., allowing time in the afternoon for children to observe their parents while at work. If you choose instead to take vacation time in the afternoon to extend your weekend, please obtain your supervisor's approval in advance.

For a complete schedule of the day's events, visit the DASTOW website.

Photos of the Day

Bees and blooms

A bee visits a hyacinth on Site 52. Photo: Lori Limberg, BSS
Another bee probes for pollen at a crabapple blossom outside ICB. Photo: Al Lilianstrom, CCD
In the News

A new detector has a clever way of detecting dark matter

From ars technica, May 2, 2013

A new dark matter detector has gone online today, using a rather clever method of searching for signs of rare interactions between dark and regular matter. The tool uses a liquid that's kept poised on the edge of boiling, such that even the tiniest bit of additional energy—say, caused by the impact of a dark matter particle—will create a bubble of vapor in the detector.

The new detector is called COUPP, for Chicagoland Observatory for Underground Particle Physics. Although it was organized by Fermilab outside of Chicago, the detector resides in Canada's SNOLAB, deep in a mine near Sudbury, Ontario. This location shields it from a lot of the background noise of particles that come from the atmosphere and radioactive substances.

Read more

In the News

Antimatter might fall up, say physicists

From Christian Science Monitor, April 29, 2013

Does antimatter fall up?

That's what particle physicists are asking after they reported their first direct measurements, published in the current issue of Nature Communications, of gravity's effects on the antimatter equivalent of hydrogen.

The measurements were taken at CERN, the huge particle physics laboratory on the French-Swiss border. CERN's Antihydrogen Laser Physics Apparatus, or ALPHA, captures positrons and antiprotons, which are just like regular electrons and protons except that they have opposite charges and quantum "spins," in a vacuum chamber where they combine to form antihydrogen.

Read more

Frontier Science Result: CMS

The Higgs boson's big brother

A heavy variant of the Higgs boson would decay primarily into W bosons or Z bosons. This is a decay mode newly added to the search.

Evidence is mounting that the particle discovered last year is the long-sought Higgs boson. When it was announced, no one seemed more cautious of claiming that than its discoverers. But now, as experimental uncertainties shrink, they can confidently say that the particle has no intrinsic spin, it is mirror-symmetric, and it couples to other particles in rough proportion to their masses. These are all properties that the boson predicted by the Higgs mechanism must satisfy.

One property that the theory does not predict well, however, is the mass of that boson. All predictions relied on assumptions about physics beyond the Standard Model, but generally they were in the few-hundred-GeV range. When the LHC experiments began their search, they cast as wide a net as possible and seem to have made a catch at the low end, 125 GeV.

That's not the end of the story: Even if the 125-GeV boson gives mass to the fundamental particles, it may not be acting alone. Nothing in the theory forbids multiple Higgs bosons. In fact, many of the predictions for a low-mass Higgs were based on supersymmetric extensions of the Standard Model, and these extensions require at least five Higgs bosons. So while some physicists study the properties of the boson in hand, others scour the net for more.

CMS scientists recently published a search for additional Higgs bosons from 145 to 1,000 GeV. This mass range requires different search techniques, since a heavy Higgs would decay differently than a light Higgs. Larger data sets and new search modes both contribute to making this the most stringent limit yet—heavy Higgs bosons with Standard Model decay patterns are now ruled out up to 710 GeV.

It is remarkable to live in a time when such sweeping statements can be made with data. The few-hundred-GeV region has long been marked on physicists' maps as "thar be dragons," the energy scale at which something breaks the unity between electromagnetism and the weak force. We've already caught one dragon, why not two?

—Jim Pivarski

This paper represents a combination of a large number of independent analyses. Alexander Savin (Wisconsin) and Phil Dudero (Texas Tech) were editors of the paper, which represents work of the physicists pictured here along with many other researchers.

Today's New Announcements

Register for Argonne-UChicago-Fermilab collaboration meeting

Pet Adoption Day at Abri Credit Union in Romeoville

Finance Section website migration - today

English country dancing Sunday afternoons at Kuhn Barn - May 5 and May 19

Artwork pick-up - May 8 from 8 a.m. to 10 a.m.

LabVIEW classes scheduled - May 10 and June 13

Hubbard Street 2 Dance - Fermilab Arts Series - May 11

Lecture: Big Science, Big Challenges - May 16

OneNote 2010 class offered - May 22

All-hands meeting video now available

46th Fermilab Users Meeting registration now open

Changes to U.S. visa procedures

Butts & Guts offered Mondays and Wednesdays

Open gym basketball Tuesday evenings

International folk dancing meets Thursday evenings in Kuhn Barn

Scottish country dancing meets Tuesday evenings in Kuhn Barn

Indoor soccer

Fermilab lost-and-found is in Communication Center, WH GF

Free movie pass with Smart Cuisine purchase in Cafe

Chicago Fire discount tickets

Find new classified ads on Fermilab Today.