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Have a safe day!
Thursday, Aug. 4
2:30 p.m.
Theoretical Physics Seminar - Curia II
Speaker: Gordan Krnjaic, Johns Hopkins/Fermilab
Title: The CDF Dijet Excess and Weak Triplet, Color Octet Scalars
3:30 p.m.
DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
THERE WILL BE NO ACCELERATOR PHYSICS AND TECHNOLOGY SEMINAR TODAY
Friday, Aug. 5
3:30 p.m.
DIRECTOR'S COFFEE BREAK - 2nd Flr X-Over
4 p.m.
Joint Experimental-Theoretical Physics Seminar - One West
Speakers: Federico Sforza, INFN Pisa
Title: On the Road to Higgs→b-bbar: Diboson Reconstruction in lν+Heavy Flavor Jets at CDF
Click here for NALCAL,
a weekly calendar with links to additional information.
Upcoming conferences |
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Thursday, Aug. 4
- Breakfast: Apple sticks
- Santa Fe black bean soup
- Steak tacos
- Chicken Wellington
- Chimichangas
- Baked ham & Swiss on a ciabatta roll
- Assorted sliced pizza
- Smart cuisine: Crispy fried chicken salad
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Friday, Aug. 5
Dinner
- Cucumber cups w/ crab filling
- Seared lamb chops w/ Dijon mustard & herbs
- Hasselback potatoes
- Sautéed spinach w/ garlic & lemon
- Chocolate mousse cake
Wednesday, Aug. 10
Lunch
- Spring roll salad w/ red curry shrimp
- Pineapple flan
Chez Leon Menu
Call x3524 to make your reservation. |
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Fermilab implements traffic safety citation changes
After a suggestion from the Employee Advisory Group and reviewing regulatory requirements and offsite penalties, Fermilab has updated its levels of discipline for moving and parking violations. These changes were made to allow management more flexibility and to more closely emulate the monetary impact of similar violations offsite. This change is reflected in the revised chapter of the Fermilab ES&H Manual on traffic safety.
Previously, personnel received five days off without pay if they accrued three or more moving violations in a six-month period or four or more parking violations in a 90-day period. The new policy has reduced the number of days off without pay to a minimum of two days for a similar number of moving violations and a minimum of one day off for parking violations. The number of days off is determined by the individual’s division, section or center head in conjunction with WDRS.
In conjunction with these changes, Fermilab has also clarified both the traffic safety citation appeals process and communication practices. When someone receives a written citation from a Security Officer, they have a period of five working days to appeal the citation through the Traffic Citation Review Committee, by submitting a Traffic Citation Appeal Form.
Finally, under the modified policy Fermilab employees, visitors, users and contractors need to contact the Medical Office after a vehicle accident only if they are injured or directed to do so by a security officer. Previously, all personnel were required to go regardless of the severity of the accident.
For more information on traffic safety, please visit the Fermilab Traffic Safety webpage.
—Nancy Grossman, head of ES&H
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C2ST hosts Tesla exhibit -
Aug. 6 through Aug. 28
The Chicago Council on Science and Technology (C2ST) and the Belgrade Committee Sister Cities Chicago International will host "The Genius Spark of Nikola Tesla," a traveling exhibit from the Tesla Museum in Belgrade in its first U.S. visit from Aug. 6 to Aug. 28, at Navy Pier. Become a member of C2ST today through August 28, and you'll receive an invitation to the preview of "The Genius Spark of Nikola Tesla" VIP reception, exhibit preview, cultural celebration and discussion on innovation Friday, Aug. 5, at Northwestern University's Thorne Auditorium. This special event will be followed by a private tour of the exhibit at Navy Pier. Transportation to/from Navy Pier is provided.
Visit www.c2st.org for more information.
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Star Wars fan film - Aug. 8
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AD's Bruce Worthel and Duane Newhart film a scene in Wilson Hall's Atrium. |
A long time ago in a national laboratory far, far away… some physicists looked around their workplace and thought of dark forces. Not dark matter; not dark energy; but the ultimate force from the dark side: Darth Vader…
Now, nearly six years later, employees and users at Fermilab can view the results: the first full-length Star Wars fan film. Well, actually, you can see the first 20 minutes, for now.
The cast members of Star Wars: Forgotten Realm, of which more than two dozen are Fermilab employees, wants to thank Fermilab for its cooperation in filming by offering a sneak peek at 12:30 p.m. Monday, Aug. 8, in Ramsey Auditorium. Fox Valley TV also will air the first 20 minutes of the film later this year on Channel 17. The TV station allowed the crew use of its green room and equipment to work on some of the special effects for the film.
Several of the scenes of the movie were filmed at Fermilab, including in the NUMI tunnel, during off-work hours. This first part of the movie showcases the prairie.
The two-hour film was shot under the direction of Darren Crawford, the laboratory’s Accelerator Operations crew chief.
Read more
—Tona Kunz
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Higgs field makes a cameo on 'Eureka'
From Discover News Blog, Aug. 3, 2011
Sheriff Jack Carter (Colin Ferguson) is thrilled at the prospect of investigating a good old-fashioned bank robbery in the most recent episode of SyFy's Eureka that aired Monday night. Alas, this being Eureka, his euphoria is short lived. He soon discovers that the entire bank has vanished -- or rather, it is levitating above the town, just the latest in the usual string of weird occurrences that are the town's trademark.
See, the town's scientists have put all kinds of strange things into the bank's safe deposit vault, including a bit of antimatter and something called a "Higgs field disruptor." Those who follow particle physics know that the Higgs field (via the Higgs boson) is what gives subatomic particles their mass. So the premise here is that the antimatter disrupts the Higgs field, and various objects in Eureka start to lose mass and float away as a result.
Read more
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Origins of ultra-massive jets
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| The mass of jets produced with transverse momentum is greater than 400 GeV/c2,
and they are observed in the CDF detector. |
At CDF, physicists collide protons of energy 1 TeV (trillion electron volts) with antiprotons of equal energy. They observe a phenomenon known as a jet in many of these events. A jet is a spray of particles moving in the same direction as the quark or gluon, originially from a proton-antiproton collision. The collective energy and direction of the particles making up the jet equal those. Since these particles are practically massless, the resulting jets are expected to have low mass also. However, in some cases, jets can have a mass of more than 40 percent of their total energy.
To better understand these high-mass jets, physicists want to examine the particle that caused the jet. They try to do this by studying the spread of the particles inside the jet, usually comprising of a number of pions and kaons.
This jet substructure sheds light on the physics processes in which jets are formed, and it can also suggest the existence of massive particles that have not yet been observed.
In this study, CDF physicists measure, for the first time, the attributes of jets occurring at high energies where over 40 percent of the total collision energy comes out in the form of two or more massive jets.
CDF physicists think that the masses of these jets come from the emission by the originating particle of gluons, the particle that carries the strong force and binds the three quarks of a proton together. It is the mechanism of this gluon emission that creates the ultra-massive jets, some of which can be heavier than the nucleus of a gold atom. Quarks or gluons are the only constituents of matter that can produce jets. In this experiment, scientists observed that the high-mass jets come primarily from energetic quarks.
More detailed measurements of these massive jets show that they have a two-body signature, a feature that scientists uncovered by examining two variables that help separate jets with different shapes. This confirms the model that these massive jets primarily come from a very energetic quark emitting a single energetic gluon. This knowledge will help physicists in future studies, as we continue the search for very super-massive energetic objects such as the top quark, the most massive point-like particle known to exist.
Learn more.
—edited by Andy Beretvas
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| This work was done by Raz Alon, Ehud Duchovni and Gilad Perez, all of
the Weizmann Institute of Science in Israel, and Pekka Sinervo, University of Toronto in Canada. |
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