Fermilab Today Thursday, May 7, 2009
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Thursday, May 7
THERE WILL BE NO PHYSICS AND DETECTOR SEMINAR THIS WEEK
2:30 p.m.
Theoretical Physics Seminar - Curia II
Speaker: Fernando Cordero, University of California, Los Angeles
Title: W+3 Jet Production at Hadron Colliders: NLO QCD Corrections with BlackHat+SHERPA
3:30 p.m.
DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
THERE WILL BE NO ACCELERATOR PHYSICS AND TECHNOLOGY SEMINAR TODAY
4 p.m.
Extreme Beam - Physics at the Intensity Frontier Lecture Series - One West
Speaker: Chris Walter, Duke University
Title: Neutrino Detectors: Current Techniques, Future Challenges

Friday, May 8
3:30 p.m.
DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speaker: Hidekazu Tanaka, Massachusetts Institute of Technology
Title: Summary of SciBooNE Results for the NuInt09 Workshop
8 p.m.
Fermilab International Film Society - Auditorium
Tickets: Adults $5
Title: L'Enfant (The Child)

Saturday, May 9
8 p.m.
Fermilab Arts Series - Auditorium
Best of Dance Chicago
Tickets: $22/$11

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

Weather
Weather

Chance of rain
73°/50°

Extended Forecast
Weather at Fermilab

Current Security Status

Secon Level 3

Wilson Hall Cafe

Thursday, May 7
- Minnesota wild rice w/chicken
- Tuna melt on nine grain
- Italian meatloaf
- Chicken casserole
- Buffalo crispy chicken wrap
- Assorted slice pizza
- *Mandarin chicken

*Carb restricted alternative

Wilson Hall Cafe menu

Chez Leon

Thursday, May 7
Dinner
- Goat cheese salad w/ hazelnut dressing
- Spiced stuffed pork roast w/ apple & thyme cream sauce
- Mashed potatoes
- Carrots & broccoli
- Toffee pecan nutmeg cake

Wednesday, May 13
Lunch
- Pork braciole w/ chorizo sausage filling
- Roasted poblano pepper cream sauce
- Latin fried rice
- Coconut cake w/rum caramel sauce

Chez Leon menu
Call x3524 to make your reservation.

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www.fnal.gov/today/

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From symmetrybreaking

Making 3D images of the proton

Protons contain quarks and gluons.

Editor's note: For those of you who couldn't attend the American Physical Society meeting in Denver, Colorado, Fermilab and SLAC National Accelerator Laboratory staff have posted highlights from the lectures and discussions on symmetrybreaking, the blog associated with symmetry magazine.

The proton is a surprisingly complicated object. Far from the two up quarks and one down quark you might have heard make up the proton, it is actually a seething sea of quark pairs and gluons that surround the "bare" up and down quarks. In fact, 99 percent of the mass of the proton comes from the "sea". Only one percent comes from the bare quarks.

Kent Paschke of the University of Virginia, speaking at the American Physical Society meeting in Denver, Colorado called it an "exciting QCD vacuum bubbling with quark-antiquark pairs." Quantum Chromodynamics, or QCD, is the theory of the strong force, which governs the interactions of quarks and gluons.

So what does the proton really look like and how can physicists actually observe what happens on the inside? The answer relies on using high-energy particle accelerators, some tricky investigative work, and a lot of data.

Read more

Letter to the Editor

Praise for the Fermilab Outdoor Fun Fair

Dear Fermilab Today,

I brought my grandchildren out to the special outdoor program at the Lederman Science Center on April 26 and it was really a terrific program. My granddaughter did her own science discovery project the next day at home. A sure sign that the message got through.

Cheers,

Laurie Huget


Several scout troops visited Fermilab during the Outdoor Fun Fair on Sunday, April 26, to view fossils that show the types of creatures that existed millions of years ago when water covered the Fermilab site.

Fermilab docent Mary Hawthorne shows off a Madagascar hissing cockroach during the Fermilab Outdoor Fun Fair Sunday, April 26.

Owls and hawks native to the Illinois prairies were on display as well as their bones, wings and owl pellets at the Fermilab Outdoor Fun Fair.

In the News

Dark matter intrigue deepens

From Nature, May 5, 2009

Space telescope may have glimpsed hint of mystery particles.

New data from two experiments -- one in space, one on a balloon floating above Antarctica -- hint at a tantalizing detection of dark matter, the mysterious stuff comprising 85 percent of the universe's matter. The evidence is a reported excess of high-energy electrons and their antimatter counterparts, positrons, which could be created as dark matter particles annihilate or decay.

The signal from Fermi, the orbiting gamma-ray telescope, is subtle, whereas that claimed by the balloon-borne Advanced Thin Ionization Calorimeter (ATIC) is much more pronounced. The differences are puzzling, but the findings -- according to some -- could herald the birth of a new age of dark matter exploration.

Read more

Read more about the Fermi telescope in symmetrybreaking

Fermilab Result of the Week

Putting bounds on boson decays

Observed W+W- invariant mass compared to expected backgrounds. A hypothetical 600 GeV excited graviton (G*) signal is overlaid on the background. The upper right insert shows the ratio of G* production limit to the theoretical prediction. The mass region with ratio below one is excluded, which excludes models that predict a G* with mass below 607 GeV.

The W± and Z bosons are the two fundamental particles that mediate the weak force. At CDF, scientists are interested in the production of W+W- and W±Z pairs because they can be used to search for new, very massive particles that would decay into W+W- or W±Z final states.

Some examples of particles that scientists might discover with this search are: a Higgs boson (H) that would explain how particles gain mass, an excited graviton (G*) that could open a door to understanding extra dimensions of space and time, or new gauge bosons, W or Z (pronounced W-prime or Z-prime) that could reshape our understanding of the weak force.

The W and Z particles may decay in various ways. To search for W+W- and W±Z resonances at the same time, CDF scientists select a final state where one W± decays into an electron and a neutrino, while the other W± or Z decays into two quarks. In the detector, the neutrino goes undetected and manifests as missing energy, while the two energetic quarks fragment into two concentrated jets of particles. CDF scientists used this final state to search for the G*, W±, and Z. While no evidence of these particles was observed, CDF scientists placed upper limits on the masses of these particles that can be present in nature, narrowing the hunting ground for new particles.

-- edited by Craig Group

These analyzers contirbuted to this analysis.
Accelerator Update

May 4-6
- Three stores provided ~ 41 hours and 30 minutes of luminosity
- Problems with Linac RF station
- Problems the NuMI dehumidifiers

Read the Current Accelerator Update
Read the Early Bird Report
View the Tevatron Luminosity Charts

Announcements

Latest Announcements

Concerned about H1N1? Ask a question

Excel 2007: New Features class today

National Day of Prayer observance today

Best of Dance Chicago - Fermilab Arts Series - May 9

Barn Dance May 10

Vanpool/Transit lunch and learn - May 13

Argentine Tango classes through May 13

Rapid Hardware Prototyping and Industrial Control Application development seminar May 13

Co-ed softball season begins May 13

French, Greek, and other ethnic dances in John Parrish's workshop, May 14

Toastmasters demonstration meeting - May 14

"Angels & Demons" Lecture Night: The Science Revealed - May 21

Deadline for The University of Chicago Tuition Remission Program - May 22

NALWO - Brown Bag Lunch - Chinese Pottery - May 26

Are you Fit to a T? May 27

Nanotechnology Lecture: Crafting of Self-Assembling Materials for Medicine & Energy - Fermilab Arts Series

Science Adventures for children

Discounted Rates at Grand Geneva Resort, Lake Geneva, WI

Summer co-ed volleyball league begins June 1

Registration for Users' Meeting is open

Conflict Management and Negotiation Skills class - June 3 and 10

Discount tickets to "1964"...Beatles tribute - June 6

Susan Werner - singer/songwriter performs on Arts Series

SciTech summer camps

Recreation Department announces Club & League Fair drawing winners

 
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