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	Thursday, July 11, 2013

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Thursday, July 11

2:30 p.m.
Theoretical Physics Seminar - Curia II
Speaker: Carlos Alberto Gomez Tarazona, Universidad Nacional de Colombia
Title: Contribution to the Neutrino Form Factors Coming from the Charged Higgs of a two-Higgs Doublet Model Type I, II

3:30 p.m.
DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over

4 p.m.
Accelerator and Physics Technology Seminar (NOTE DATE) - One West
Speaker: Evan Sengbusch, Joe Sherman, Preston Burrows and Daniel Swanson, Phoenix Nuclear Labs
Title: A Long Lifetime, CW Negative Hydrogen Microwave Ion Source as a Project X Injector

Friday, July 12

3:30 p.m.
DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over

4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speaker: Sourabh Dube, Lawrence Berkeley National Laboratory
Title: Searches in Lepton Final States at ATLAS

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Wilson Hall Cafe

Thursday, July 11

- Breakfast: Canadian bacon, egg and cheese Texas toast
- Breakfast: sausage gravy omelet
- Tuna melt
- Smart cuisine: finger-lickin' baked chicken
- Mom's meatloaf
- Spicy buffalo chicken wrap
- Greek chicken salad
- Chef's choice soup
- Green pork chili
- Assorted pizza by the slice

Wilson Hall Cafe menu

Chez Leon

Friday, July 12
Dinner
- Minted orange, fennel and red-onion salad
- Grilled lamb chops with hot red-pepper relish
- Lemon tarragon green beans
- Toasted bulgur with corn and tomatoes
- Individual berry cobblers with spiced cream

Wednesday, July 17
Lunch
- Chili-marinated flank steak
- South-of-the-border coleslaw with cilantro and jalapeno
- Caramel-coated cream cheese flan

Chez Leon menu
Call x3524 to make your reservation.

Bill Lee is new Minos underground areas coordinator

Bill Lee

Bill Lee has taken over as Fermilab's new Minos underground areas coordinator now that the former underground coordinator, Aria Soha, has moved on to work on the Muon g-2 project. Lee worked as the run coordinator on the DZero experiment from 2000 until the fall of 2012.

As Minos underground areas coordinator, Lee will oversee all underground operations, ensuring that construction, experiments and other underground happenings run smoothly and without interfering with each other.

"Right now it's very exciting because we've got the NOvA experiment coming in," Lee said. "You've got to make sure that you can get all of these pieces into the hall and also make sure you can keep the other experiments running, since we expect beam soon."

As a graduate student, Lee worked on the NuSea experiment at Fermilab, which investigated the nuclear sea. After graduating in 1999, he worked on DZero as a postdoc at Florida State University before eventually being brought on as the experiment's run coordinator. He left the lab for six months beginning in October, teaching ultrasound physics at Sanford Brown College. He returned to Fermilab in April.

"I liked teaching," he said. "But I like doing research. One of the things that I've always liked to do is to make things work."

In his capacity as underground coordinator, Lee will still get to do some teaching in the form of giving tours to both employees from other areas of the lab and anyone outside the lab who has an interest in how it works.

"I think it's really important that we give tours to people outside of Fermilab," Lee said. "So many people don't understand what we're doing, and it's really important to be able to take them and show them exactly how these detectors work and what we're trying to do and tell a little about what we're trying to learn."

—Laura Dattaro

Photo of the Day

Night lights

This composite of 214 images taken over 18 minutes shows the flashes of fireflies. Each yellow spot is a single firefly flash. The occasional dashed line is a firefly that was in motion when the photo was taken. Photo: Steve Krave, TD

In Brief

Entries now being accepted for CMS poster contest

The CMS experiment is hosting a poster contest open to participating CMS institutions. Image: CERN

The CMS experiment at CERN would like to generate a new set of posters to be used for publicity over the next two years. To that end, CMS is hosting a poster contest. A successful proposal will likely include several posters that promote the energy and excitement of the people, equipment and physics explored by CMS using the LHC.

The posters should have the following properties:

A0 (or bigger) format
common look and feel for all posters in the set
worldwide usage, including English-language text

The submissions must come from CMS institutions—laboratories or universities collaborating on CMS—and will be official submissions of those institutions (the artist will receive artistic credit). It is not necessary that individual submitters be part of CMS to enter.

Those at Fermilab interested in this artistic project and who would like to submit poster ideas on behalf of the laboratory should send their ideas or entries to US CMS Outreach Coordinator Don Lincoln, who will officially submit the entries. Individuals may not submit proposals to CMS directly; any proposals submitted this way will be rejected.

Initial submissions must be received by July 31, with fully executed posters delivered later in the summer.

For more information, see the complete poster contest rules or contact Don Lincoln.

In the News

University and national laboratory leaders gather to discuss 'Big Science'

From UChicagoNews, June 28, 2013

Surrounded by big exhibits that scientists from the University of Chicago, Argonne National Laboratory and Fermi National Accelerator Laboratory helped to create, the leaders of those three institutions discussed the role and promise of the "symphony orchestra" that is big science.

In the News

Synopsis: Energetic neutrinos on ice

From Physics, July 8, 2013

Neutrinos can travel huge distances through obstacles (like interstellar gases) that would stop other particles in their tracks. They are hard to catch, but also potentially good signals of what is going on in galaxies and other things far, far away. In Physical Review Letters, the international IceCube collaboration reports observation of the highest energy neutrinos ever recorded. If confirmed by additional observations, the events could be the iceberg's tip of a cosmic flux of unusually high-energy neutrinos, unknown until now. These messengers could be carrying information about gamma-ray bursts and active galactic nuclei that may have produced them.

Frontier Science Result: CDF

The charming socialites

The figure shows the decay of the D*⁺ into a D⁰ and a soft (low-momentum) pion. The D⁰ then decays into a negative kaon and a positive pion. This is called a right-sign decay. Another decay mode called a wrong-sign, which is very rare, can occur. In this mode, the D⁰ decays into a positive kaon and a negative pion.

Since the discovery of the charm quark in 1974, physicists have postulated a rare process in which a charm particle spontaneously changes into its antiparticle. Evidence for this unique "social" behavior, called charm mixing, was uncovered more than three decades later by experiments at the B-factory accelerators at SLAC in California, KEK in Japan and the CDF experiment at Fermilab. Conclusive observation of the process has emerged this year from the LHCb experiment at CERN, with 9.1 sigma significance, and from this CDF experiment, with 6.1 sigma significance.

In these recent experiments, neutral D mesons (D⁰), which are bound states of a charm quark and an anti-up quark, are seen to change into anti-D mesons. Using the Standard Model of particle physics, it is difficult to make a precise prediction of the mixing rate. The observed rate could be due solely to Standard Model physics but may also indicate the presence of new particles that mediate the mixing process.

The results of the recent CDF measurement using the full data set for Run II are shown in the lower figure. A ratio R_m of a rare D⁰ decay mode to a more common one is plotted versus decay time. If the mixing process did not occur, the ratio would remain unchanged with time. The data clearly show the contrary behavior: The ratio increases with time. The plot also shows the difficulty of the measurement. The rare decays take place only about five times for every thousand decays. Furthermore, some of the decays originate from beauty particle decays (non-prompt) and not from direct (prompt) production in the proton-antiproton collisions of the Tevatron. The decays from the prompt D⁰ mesons follow the red curve in the figure, whereas the blue curve has contributions from prompt and non-prompt decays.

Now that charm mixing is clearly established, more precise measurements and improvements in theoretical interpretation are needed. The next generation of measurements will include a search for differences in the mixing rates of D⁰ versus anti-D⁰ mesons. Such a difference could elucidate the puzzle of why particle matter in the universe overwhelmingly dominates over antimatter.

Learn more

—edited by Andy Beretvas

The ratio of the rare D⁰ decay mode (K⁺π^-) to a more common one (K^-π⁺) versus decay time, measured in units of the D⁰ lifetime. If the mixing process did not occur, the ratio would remain unchanged with time. The measured ratio includes decays from prompt and non-prompt D⁰ mesons (blue curve). The ratio using only prompt decays is shown by the red curve.

Top row from left: Paul Karchin and Mark Mattson (both at Wayne State University). Bottom row from left: Satyajit Behari (Fermilab) and Paolo Maestro (University of Siena and INFN- Pisa)

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