Thursday, June 20, 2013

Have a safe day!

Thursday, June 20


3:30 p.m.

Friday, June 21

8:30 a.m. to 12:30 p.m.
Daughters and Sons to Work Day

3:30 p.m.

4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speaker: Yun-Tse Tsai, University of Rochester
Title: Truth and Beauty Together: Evidence for s-channel Single Top Production

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

Ongoing and upcoming conferences at Fermilab


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Secon Level 3

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Flags at full staff

Wilson Hall Cafe

Thursday, June 20

- 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, June 21

Wednesday, June 26
- Stuffed portobello mushroom with spinch and feta
- Romaine, strawberry and orange salad
- Vanilla bean cheesecake

Chez Leon menu
Call x3524 to make your reservation.


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Special Announcement

Gypsy moth treatment on Fermilab grounds next week

The U.S. Department of Agriculture will overfly Fermilab next week to spread plastic flakes to disrupt moth mating. Photo courtesy of USDA

Sometime on June 24 or 25, the U.S. Department of Agriculture will overfly Fermilab, using between two and five airplanes to disperse a chemical that disrupts mating behavior in male gypsy moths.

The chemical is contained in tiny plastic flakes that will be scattered over an area of approximately 5,000 acres, including most of the southwestern portion of the lab and extending south to I-88. The airplanes (see picture) will fly very low, less than 100 feet above treetop level, to ensure that the flakes are delivered accurately. The flakes are not toxic and do not pose a threat to humans or other animals or plants. This action is supported by an agreement between DOE and USDA.

No special precautions need to be taken by anyone who may be outdoors at the time of treatment.

In case of bad weather, June 26 is the date for the back-up plan.


Giorgio Apollinari appointed new director of LARP

Giorgio Apollinari

Giorgio Apollinari, currently head of Fermilab's Technical Division, has been selected as the new director for the LHC Accelerator Research Program, or LARP. Apollinari will help during a short transition period by serving as division head until a replacement has been found.

"Giorgio was selected from among many highly qualified applicants for the LARP director position," said Stuart Henderson, associate laboratory director for accelerators. "This selection was based in large measure on his exemplary leadership of the Technical Division over the last six years."

Apollinari joined Fermilab in 1998 as the local manager of the construction of the CMS muon chambers. In 2005, after the completion of the chambers and their installation at CERN, he became the head of the new Superconducting RF Department before accepting a nomination to head of the Technical Division in 2007.

LARP coordinates U.S. activities related to the LHC accelerator at Fermilab, Brookhaven, Lawrence Berkeley and SLAC national laboratories; it has also collaborated with the University of Texas at Austin and Old Dominion University in Virginia. It is currently undergoing a transition from a program focused on research and development to one that produces accelerator hardware to be incorporated into LHC upgrades.

"After six years as division head, I believe that there is an opportunity and a chance to do something different, which is working on the LARP program and helping it transition to a project phase to make sure the LHC will keep performing and providing physics opportunities for research," Apollinari said.

Eric Prebys, who has served as LARP director for five years, said it is this transition phase that prompted the move to a new director.

"I think Giorgio is an excellent choice," Prebys said. "His experience managing the Technical Division and several large projects are very well suited to the LARP project moving forward."

Prebys said he'd like to increase his involvement in the Mu2e experiment and would also like to stay involved with LARP after he steps down as director.

"Eric did a great job in running LARP for the last five years, and he has been the one that has pushed the accelerator physics part of the program to very good results," Apollinari said.

The importance of the LARP collaboration goes beyond accelerator R&D, he said.

"I know we will have to work very hard, and maybe even benefit from a sprinkle of good luck, as we move forward to complete our contributions to the unique and outstanding research tool that is the LHC," Apollinari said. "Because at the end, whatever we produce—magnets, cavities, detectors—they are all tools to understand and resolve the deeper hidden secrets of nature."

Laura Dattaro

In the News

Smash Lego atoms with a Large Hadron Collider model

From CNET, June 18, 2013

Unfortunately, the Large Hadron Collider is too big to bring home and put on display in your living room. Scientist Sascha Mehlhase created a 4,500-piece Lego model of the collider back in 2011 at a cost of about $2,700. That was also too big for most people.

Now, he has created a smaller model of the ATLAS experiment, a particle physics experiment at the Large Hadron Collider, and put it up as a candidate for an official Lego kit.

The project is on Cuusoo, a site for Lego enthusiasts to share their models and attempt to gather 10,000 votes in order for Lego to consider making their creations as kits. Mehlhase's ATLAS currently has 5,756 supporters, so it has definitely caught the eyes of Lego builders.

Read more

Frontier Science Result: CDF

Recovering the missed top quark events

Dominant production of top quark and lepton-plus-jets decay mode is shown. CDF physicists recover these events even though a charged lepton is missed.

The top quark is the most massive of the currently known elementary particles. Of the six quarks, the top quark has the largest mass, which is a whopping 40 times more massive than that of the next most-massive quark, the bottom quark. Because of the top's very large mass, it may play a special role in our understanding of the fundamental theory that describes the electromagnetic and the weak interactions. Combined measurements of the W boson mass and the top quark mass provide an indirect determination of the mass of the recently observed Higgs particle. Because of the importance of the top quark mass, experimenters at the Tevatron have focused much of their efforts on improving the precision of its measurement.

When top quarks were created in Tevatron collisions, they almost immediately decayed into a bottom quark and a W boson and were most often produced in pairs. The top quark is best measured when one W decays into a neutrino and a charged lepton (electron or muon) and the other top quark decays into a pair of jets (light quarks). This so-called lepton-plus-jets decay mode, therefore, contains one well-reconstructed charged electron or muon. When making this standard lepton-plus-jets analysis, CDF scientists do not measure tau leptons that contain a strongly interacting particle (a hadron) in their decays. They also do not detect top-antitop events that contain electrons or muons that occur outside the detector coverage for these particles (in the central region of the detector). Recently, CDF scientists made a new measurement of the top quark mass recovering such missing events. This measurement adds unique information into the overall picture of the top quark mass and improves the precision of its mass.

The measurement under discussion is performed using a template method. Physicists first build several physical observables with samples whose top quark masses are already known. The shape of those samples is compared to the same observables built using the collected data set. Scientists extract a most-likely top quark mass for the data by deciding which known sample is most like the unknown sample.

Using the full Run II data set of this unique data sample, CDF physicists measured the top quark mass to be 173.93 ± 1.85 GeV/c2. The measurement is consistent with the recently published Tevatron average of 173.18 ± 0.94 GeV/c2 and contributes approximately 12 percent to the most recent preliminary Tevatron average.

Learn more

edited by Andy Beretvas

These CDF physicists contributed to this data analysis. From left: Hyun Su Lee (Ewha Womans University, Seoul, Korea), Jian Tang (University of Chicago) and Fermilab Deputy Director Young-Kee Kim.
Photo of the Day

Profile of an American robin

An American robin looks for breakfast. Photo: Marty Murphy, AD

Today's New Announcements

Pool memberships at Fermilab

10K Steps drawing winner

DASTOW - June 21

Help the environment! Attend Abri's Shred & Recycle event - June 22

BuZheng Qigong & Tai Chi Easy begins June 24

Registration for FEMA assistance due July 9

Behavioral interviewing course scheduled for July 18

Gypsy moth treatments at Fermilab

Summer intern Friday tours

Sitewide domestic water flushing

Volunteer opportunity - Coat Drive 2013

10K Steps participation drawing winner

Pool now open

Water fitness at Fermi Pool

Ultimate Frisbee Mondays and Wednesdays

Outdoor soccer at the Village

International folk dancing moves to Wilson Hall for summer

Scottish country dancing meets Tuesday evenings in Auditorium

Join the Tango Club

Raging Waves water park discount