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PDF Version for Printing Thursday, October 4, 2007 Subscribe | Contact Fermilab Today | Archive | Classifieds Search Calendar Feature Fermilab Result of the Week Thursday, Oct. 4 Fermilab scarecrow ready to An identity crisis 1 p.m. electrify St. Charles festival ILC ALCPG Physics and Detector R&D Seminar - West Wing, WH-10NW Speaker: S. Magill, Argonne National Laboratory Title: A Critical Look at the Status of PFA for the SiD Concept 2:30 p.m. Theoretical Physics Seminar - Curia II Speaker: W.-Y. Keung, University of Illinois, Chicago This figure shows a calculation of the most likely Title: Collider Phenomenology Docent Mary Hawthorne proudly displays frequency for the flavor mixing in neutral Bs meson of Unparticles scarecrow Ben Franklin's head. 3:30 p.m. events seen at the DZero experiment. DIRECTOR'S COFFEE Benjamin Franklin's disembodied head The neutral, strange B meson (B ) has a BREAK - 2nd Flr X-Over haunted Wilson Hall this week. A few s THERE WILL BE NO employees saw the top of his bald head problem. While most mesons have a ACCELERATOR PHYSICS turning a corner. Some caught a glimpse of his consistently clear picture of who they are, the AND TECHNOLOGY bemused expression. Others stared at his neutral Bs meson constantly faces a crisis of SEMINAR TODAY glowing eyes. identity. A feature of the electroweak interactions occurring within the B meson Friday, Oct. 5 Several people jumped back. s 12 p.m. allows it to spontaneously transform into its Wellness Works Brown Bag "One guy nearly walked into a wall, when he own antiparticle. In this dire need for a Seminar - One West saw me carrying the head on a stick," said therapist and a couch, researchers from the Speaker: S. Broy, Illinois Bone docent Mary Hawthorne, the head's creator DZero collaboration are very willing to listen. and Joint Institute LLC and escort. Title: Are You Fit to a T? The Bs meson is a bound state of a strange 3:30 p.m. The head will join its body at the St. Charles quark and a bottom antiquark, and in such DIRECTOR'S COFFEE Scarecrow Festival held Friday through close quarters the quarks interact by BREAK - 2nd Flr X-Over Sunday in Lincoln Park on Main Street. exchanging W bosons. Via a phenomenon 4 p.m. For the last four years, Fermilab has submitted known as flavor mixing, these interactions can Joint Experimental-Theoretical automated entries to the festival. Fermilab transform the Bs meson into its antiparticle. Physics Seminar - One West entries always have something to do with a Theory predicts that this mixing should occur Speaker: L. Hsu, Fermilab scientist, said Education Program Leader Sue at a well-defined frequency, and a precision Title: Recent Results from Sheehan. measurement could provide a probe for a KamLAND range of new physics. The Tevatron is An electrified Ben Franklin with glowing eyes, currently the only place in the world where this Click here for NALCAL, rotating head, lightning-zapped kite and a frequency can be measured. DZero's spring a weekly calendar with links soundtrack of thunder claps makes up this 2006 result set the world's first upper and to additional information. year's entry. lower limits at 17 to 21 inverse picoseconds -1 Weather Hawthorne, Todd Johnson, of the AD, and (ps ) at 90% confidence level. docent David Seymour assembled Franklin at Site 37 from PVC pipes, straw and Johnson's To understand the true identity of this meson- Mostly sunny 81°/62° private collection of small motors and light-up in-crisis, DZero researchers had to reconstruct toy parts. its entire life's time line. The Bs is born Extended Forecast together with an anti-B particle, which both Weather at Fermilab "I love getting to do the special effects and decay rapidly. By carefully measuring how far Current Security Status work behind the scenes," Johnson said. "I each meson traveled before decaying, a time never stopped being a kid." line can be established. By reconstructing the Secon Level 3 available decay particles, each meson's flavor Seymour and Hawthorne constructed the status (meson or antimeson) at the time of Wilson Hall Cafe scarecrow's skeleton and burlap head. decay can be determined. Differences in flavor Johnson was in charge of the sound of a at production and decay time yield crucial thunderclap, the voice of Ben Franklin and the Thursday, Oct. 4 evidence on how the Bs meson's identity is special effects that make the scarecrow's - Southwestern chicken tortilla plasma-disc eyes spark. oscillating. - Philly style cheese steak - *Garlic herb roasted pork Participating in the scarecrow festival is a In 2.4 inverse femtobarns of data, DZero - Mediterranean chicken great opportunity to build a relationship with researchers have measured an oscillation -1 packages St. Charles and spread the word about frequency of 18.52±0.91 ps , a 3.1 sigma - Southwestern turkey wrap science, Sheehan said. The laboratory also result. Several advances in experimental - Assorted slice pizza provides booths with hands-on science technique made this possible: DZero's - *Marinated grilled chicken activities at the festival. Past Fermilab upgraded silicon detector and event-by-event Caesar salads scarecrows include an electric-powered, correction factors improved the decay length bicycle-pedaling Einstein and the father of measurement, and difficult new Bs decay *Carb restricted alternative relatively in repose with dreamy theories modes were included along with a new flavor- Wilson Hall Cafe menu floating above his head. tagging method. This large effort has indeed Chez Leon helped clarify the Bs meson's identity, and will For more information on the festival, visit the St. Charles Chamber of Commerce Web site. improve understanding of other quark-mixing Thursday, Oct. 4 parameters. As data from the Tevatron piles Dinner --Haley Bridger up, DZero is keeping the therapist's couch - Shrimp bisque free, carefully listening for even more insight - Grilled pork tenderloin w/ into this particle's mixed identity. peach & ginger sauce - Honey roasted root vegetables - Hazelnut cake w/frangelico - Crème anglais Wednesday, Oct. 10 Lunch - Middle Eastern cornish hens - Lentil rice - Stuffed plum tomatoes - Almond baklava Primary analyzers of the neutral B mixing analysis From left: Mary Hawthorne, David Seymour and s Chez Leon menu Todd Johnson with their unfinished creation. The put in a great effort to improve all aspects of the Call x4598 to make your finished scarecrow will be on display at the St. analysis. reservation. Charles Scarecrow Festival this weekend. Archives From iSGTW Fermilab Today One petaflop and a whole lot of PLAYSTATION Result of the Week Safety Tip of the Week ILC NewsLine Since PLAYSTATION joined Folding@home in March 2007, participation by the PS3 user Info community has been phenomenal, providing Folding@Home with immense computing power that is helping to fast forward its research and reach one petaflop. Image courtesy of Folding@home The efficiency and good quality of the data from Fermilab Today PLAYSTATION 3 and Stanford University’s the silicon tracking detector is crucial for this analysis and many others. The DZero silicon team is online at: Folding@home program recently announced www.fnal.gov/today/ is making an extraordinary effort during the current their achievement of one petaflop, the first Tevatron shutdown to further enhance the time such a milestone has been reached on a performance of this detector. Send comments and distributed computing network. suggestions to: Result of the Week Archive [email protected] A petaflop is the ability to do one quadrillion floating point operations per second (FLOPS), Announcements the equivalent of every person on the planet perform 75,000 calculations every second. Have a safe day! “The recent inclusion of PS3 as part of the RSVP for Amy Lee Segami lecture before Folding@home program has afforded our Oct. 10 research group with computing power that In celebration of Illinois Arts Week, the goes far beyond what we initially hoped,” said Fermilab Art Gallery will host a public lecture Vijay Pande, Associate Professor of Chemistry by Amy Lee Segami from 1-2 p.m. on Friday, at Stanford University and Folding@home Oct. 12 in One West. The lecture will explore project lead. the "Probability of Certainty in Creative Read More Problem Solving Technique" along with a demonstration of Suminagashi. A one-hour In the News tour of Fermilab will follow the lecture. The event is free and open to the public. Please DOE launches Change a Light, RSVP before Oct. 10 by contacting Georgia Schwender. Change the World campaign Register for S/CII training From DOE NEWS, Oct. 3, 2007 Technical personnel and managers can sign up for suspect/counterfeit items identification Encourages Americans to pledge to change training. Training is scheduled to take place one light to an efficient compact fluorescent Oct. 16-18 at Argonne National Laboratory. lightbulb You may register until Oct. 9 at the Fermilab U.S. Department of Energy (DOE) Secretary Professional Development Web site. Samuel W. Bodman today launched the 2007 Change a Light, Change the World campaign Health and Wellness Fair Oct. 11 encouraging every American to change at Fermilab's Employee Health and Wellness least one light at home to an ENERGY STAR Fair will take place from 11 a.m. to 2 p.m. on (r) Compact Fluorescent Light bulb (CFL). Thursday, Oct. 11, 2007. These bulbs are estimated to use 75 percent Word 2003: Introduction Oct. 10 less energy than standard bulbs and last up to Learn to create, edit, format and add tables to ten times longer, resulting in fewer basic business documents with Word 2003 greenhouse gas emissions and substantial through this training course. For more energy savings.
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