Thursday, July 18, 2013

Have a safe day!

Thursday, July 18

2:30 p.m.
Theoretical Physics Seminar - Curia II
Speaker: Jack Kearney, University of Michigan
Title: Electroweak Dark Matter—Where Do We Stand?

3:30 p.m.

Friday, July 19

Special Particle Astrophysics Seminar (NOTE DATE, TIME, LOCATION) - WH6NW
Speaker: Javier Tiffenberg, Fermilab
Title: DAMIC: A Novel Dark Matter Experiment

3:30 p.m.

4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speaker: Ashish Kumar, SUNY Buffalo
Title: Sampling the QCD Soup with Massive Vector Bosons and Heavy Flavor

8 p.m.
Fermilab Lecture Series - Auditorium
Speaker: Chris Lintott, University of Oxford
Title: How to Discover a Planet From Your Sofa
Tickets: $7

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Ongoing and upcoming conferences at Fermilab


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Wilson Hall Cafe

Thursday, July 18

- Breakfast: Canadian bacon, egg and cheese Texas toast
- Breakfast: Greek omelet
- Chicken fajita club sandwich
- Asian beef and vegetables
- Chicken cacciatore
- Italian loaf sandwich
- Tex-Mex grilled-chicken salad
- Chef's choice soup
- Chicken noodle soup

Wilson Hall Cafe menu

Chez Leon

Friday, July 19

Wednesday, July 24
- Bacon-cheese-stuffed shells
- Field greens with herb vinaigrette
- Fresh fruit plate

Chez Leon menu
Call x3524 to make your reservation.


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Fermilab hosts first ASTA users' meeting

Cryomodule 2 was recently installed in the Advanced Superconducting Test Accelerator in Fermilab's NML building. The first users' meeting for ASTA will take place on July 23 and 24. Photo: Reidar Hahn

On July 23 and 24, Fermilab will host the first users' meeting for the Advanced Superconducting Test Accelerator, which produced its first electrons on June 20. The meeting will address the current state of ASTA, plans for the near future and experiment proposals.

ASTA, which will provide a low-energy test beam (50-MeV electrons), an area for several high-energy test beams (300- to 800-MeV electrons), and an electron and proton storage ring called IOTA, is set to be capable of hosting a dozen experiments working in parallel. At the users' meeting, discussion will focus on experiment proposals for accelerator research and development in four main areas: particle physics at the Intensity and Energy frontiers, future superconducting radio-frequency accelerators, novel radiation sources, and stewardship and applications.

So far, 60 individuals have registered, about two-thirds of whom are from outside Fermilab. They represent national labs, industry and academic institutions across the United States, plus CERN in Geneva, Switzerland, and BINP in Novosibirsk, Russia.

"It's a pretty broad and diverse community, and that's exactly the reaction we were hoping for," said Vladimir Shiltsev, ASTA's interim program director and head of Fermilab's Accelerator Physics Center.

The meeting will also feature a seminar with the DOE Office of Science's Eric Colby, who will discuss how ASTA and the new Illinois Accelerator Research Center at Fermilab fit into DOE's global strategy. DOE is increasingly looking for accelerator applications outside high-energy physics, Shiltsev said, and the varied interest in ASTA indicated by the meeting registrants is a positive thing.

"There are many interesting opportunities for accelerator applications, but you need places, you need test beams," he said. "That's where ASTA could be a big splash for the entire community."

Shiltsev hopes that, ultimately, a majority of ASTA users will come from outside Fermilab.

"We want Fermilab to be the world leader in the Intensity Frontier, and ASTA is a big part of that strategy," he said. "I hope Fermilab will be one of the major stakeholders. We want to build more connections with the community. This meeting is a very important first step."

Laura Dattaro

In Brief

Call for applications: URA Visiting Scholars Program

Universities Research Association Inc. has announced a deadline of Aug. 26 for the submission of applications for the fall 2013 cycle of awards in the URA Visiting Scholars Program at Fermilab. Award recipients will be notified at the end of September.

These awards provide financial support for faculty and students from URA's 86 member universities to work at Fermilab for periods of up to one year. URA makes two rounds of awards each year, in the spring and fall. The application deadline for the spring 2014 cycle is Feb. 24, 2014.

Proposed visits can range from attendance at Fermilab conferences or summer schools held at Fermilab to year-long research stays. Support from this program can include transportation costs and local lodging expenses during a series of shorter visits or salary support during a longer visit. Individual awardees may receive up to a maximum of $50,000 in any 12-month period.

The program is sponsored by URA. The 86 URA member universities each have agreed to contribute $5,000 a year for five years in support of joint Fermilab-URA research and education initiatives.

For details on the URA Visiting Scholars Program at Fermilab, including eligibility, the application process, award administration and the names of past award recipients, visit the URA Visiting Scholars website.

In the News

Mystery solved: X-ray light emitted from black holes

From isgtw, July 17, 2013

Exactly how do black holes produce so many high-power X-rays? The answer has remained a mystery to scientists for decades—until now. Supported by 40 years of theoretical progress, astrophysicists have conducted research that finally bridges the gap between theory and observation, demonstrating that gas spiraling toward a black hole inevitably results in X-ray emissions.

Read more

In the News

Japanese team sees gamma-ray pulse before lightning flash

From Physics World, July 10, 2013

Physicists in Japan have made the best study yet of the gamma rays that are produced in the minutes leading up to a lightning flash. In addition, the team also observed for the first time emissions that ended abruptly less than a second before the exact moment the flash occurs. The finding provides important information about the relationship between the mysterious atmospheric accelerators that produce the gamma rays and the lightning that we see in the sky.

Read more

Frontier Science Result: DZero

Z bosons more charming than expected

The first dedicated study of Z boson plus charm quark production shows that the Z boson has more charm than predicted.

Ask someone how often he's seen a physicist with charm and you might get a wild response, but ask a physicist how often a Z boson is found with charm and—thanks to a new result from DZero—they can give you a quantitative answer.

Sometimes a Z boson, the neutral weak-force carrier, is produced in association with quarks. This process is important to understand because it is a background to studies of the Higgs boson. In particular, it is crucial to know how often the quark that accompanies the Z boson is a charm quark or a bottom quark since that can mimic the Higgs boson's decay signature.

Interactions involving the strong force are difficult to predict directly in the Standard Model and are instead estimated from models that are constrained by data. While previous studies have measured how often a bottom quark accompanies a Z boson, this is the first study focused on Z boson-plus-charm quark (Z+c) production.

The difficulty in making this measurement lies in discriminating between the different flavors of quarks. When a quark is produced after a particle collision, strong-force interactions quickly begin to generate more quarks and gluons around it, creating a spray of particles called a jet. The jets initiated by charm quarks and bottom quarks may be separated by a few millimeters from the other particles made in a collision. By looking for this signature, DZero scientists were able to create a data sample enhanced with charm and bottom quarks. The analyzers then exploited the slight differences between the jets from charm quarks and those from bottom quarks in order to measure the number of Z+c events. By comparing the Z+c events to the total number of Z boson-plus-jet events or Z boson-plus-bottom quark events, the analyzers were able to reduce the uncertainty on their measured rate.

None of the tested models predicted a ratio of Z+c events to total Z boson-plus-jet events as high as was observed in the data, falling on average a factor of two-and-a-half too low. The enhancement is consistent, however, with that observed in recent measurements of photon-plus-charm quark production at the Tevatron. While finding out that Z bosons come with more charm than expected may not be pleasant news for the physicists studying the Higgs boson, it is important information that will feed into future models of Z boson-plus-quark production.

Mike Cooke

These physicists made major contributions to this analysis.
As chair of the Speakers' Bureau at DZero, Horst Wahl, Florida State University, leads the efforts to arrange speakers to fulfill presentation requests from conference organizers and to archive public talks and proceedings.
Photo of the Day

Going stag

A stag beetle goes out for a morning stroll around the FCC parking lot. Photo: Andy Huguenard, CCD

Romanian dance workshop and live music in Auditorium - today

Fermilab Prairie Plant Survey (Quadrat Study) - July 19

NALWO potluck supper - July 19

Chris Lintott: How to Discover a Planet From Your Sofa - July 19

Yoga begins July 23

UEC/FSPA presentation for Fermilab, Argonne postdocs, students - July 24

What's Your Financial IQ Challenge runs from July 1 - 31

July EAP webinar

C2ST presents The Physics of Baseball - Aug. 2

Puppet Fundamentals course offered in September

Poster contest for the CMS experiment

Same-sex couples now eligible for immigration benefits

Outdoor soccer at the Village

English country dancing at Kuhn Barn

Scottish country dancing meets Tuesday evenings in Auditorium

International folk dancing in Auditorium for summer

Fermilab discount at Don's Auto Ade Inc.

Bristol Renaissance Faire discount