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PDF Version for Printing Fermilab Today Thursday, January 4, 2007 Subscribe | Contact Fermilab Today | Archive | Classifieds Search Calendar Special Announcement Fermilab Result of the Week Thurs., January 4 New management, A relatively simple idea 1:00 p.m. ALCPG ILC Physics new letterhead and Detector Seminar - West Wing (WH-10NW) Next time you send a letter or fax from Speaker: D. Wright, Stanford Fermilab, don't forget to use the new Linear Accelerator Center letterhead with the FRA logo. Download the Title: Hadronic Shower letterhead here. Simulations in Geant4 From the University of Chicago 3:30 p.m. Director's Coffee Break - 2nd Floor Crossover U of C names Donald 4:00 p.m. Accelerator Physics and Technology Seminar - 1 Levy Vice President for West Research and for National The distribution of decay lengths of b quark candidates. See below for technical description of Speaker: L. Cooley, Laboratories Brookhaven National b quark candidates used to measure the top quark mass.* Laboratory Donald Levy, the Albert A. Michelson Title: Essential Features of According to Einstein's special theory of Distinguished Service LARP Strands and Prospects relativity, time slows down for objects that are Professor in Chemistry for Still Better High-Field moving. This "time dilation" effect can be quite at the University of Superconductors substantial for objects moving near the speed Chicago, has been of light. For years, the CDF experiment has THERE WILL BE NO appointed the exploited this effect to identify bottom quarks THEORETICAL PHYSICS University’s Vice moving at relativistic speeds from top quark SEMINAR THIS WEEK President for Research decays. Now a new CDF technique uses this and for National effect to measure the mass of the top quark Fri., January 5 Laboratories, President itself. 3:30 p.m. Director's Coffee Robert Zimmer Break - 2nd floor crossover announced today. The Donald Levy Top quarks produced at the Tevatron collider 4:00 Joint Experimental appointment was effective Jan. 1. can usually be thought of as being created "at Theoretical Physics Seminar - rest," since just about all the energy from the 1 West As Vice President, Levy will work closely with collisions goes into making these very heavy Speaker: A. Kotwal, Duke President Zimmer, Provost Thomas particles. However, when the unstable top University Rosenbaum, Deans and the Directors of quark decays into the W boson and the much Title: First Run II Measurement Argonne National Laboratory and Fermi lighter b quark, there is enough energy of the W Boson Mass by CDF National Accelerator Laboratory to advance released from the top quark mass to give an research at the University and the laboratories. Click here for NALCAL, especially large boost of momentum to the b quark. This significant velocity leads to time a weekly calendar with links “Don Levy has the intellectual standing as well dilation, causing the b quark to travel further to additional information. as the administrative talents to take on this before decaying. The key to this measurement Weather important role,” Zimmer said. Levy succeeds Rosenbaum, who became Provost of the is that by measuring the average flight length University on Jan. 1. of the b quark, one can measure the mass of Partly Cloudy 51°/37° the top quark. “While his responsibilities will enhance our An important aspect of this analysis is that it is Extended Forecast work across the University, this is a particularly important time for our relationships the first top quark mass measurement which Weather at Fermilab with Argonne and Fermilab,” Zimmer said. does not use the energy determined from the Current Security Status “The recent decisions by the U.S. Department calorimeter detectors to reconstruct the top of Energy to award the management contracts mass. It thus has a negligible dependence on Secon Level 3 for these national laboratories to the University the energy scale uncertainty that is a dominant and our academic and management partners uncertainty in all previous top quark mass Wilson Hall Cafe increase our oversight responsibilities, measurements. So, even though the decay enhance our ability to contribute to the length technique is not yet a competitive advancement of the laboratories, and offer measurement of the top mass by itself, it helps file:///U|/website/pub/v5_0/today/archive_2007/today07-01-04.html (1 of 3)1/5/2007 9:49:48 AM Fermilab Today Thursday, January 4 new opportunities for significant research to reduce the overall uncertainty on the top -Santa Fe Black Bean collaborations.” mass when combined with other results. With -Sloppy Joe the increased top quark data expected at the -Stuffed Peppers Read full press release LHC, this technique is expected to become -Sauteed Liver & Onions Milestones competitive with the other approaches. -Baked Ham & Swiss on a Ciabatta Roll Learn more -Assorted Slice Pizza -Crispy Fried Chicken Ranch Salad Wilson Hall Cafe Menu Chez Leon Thursday, January 4 Dinner Vol-au-Vents with Mushroom Duxelle From left: Chris Hill (University of Bristol) and Joe Crabcakes with Spicy Pimento Incandela (University of California, Santa Barbara) Sue Grumboski retires: Otherwise known as the Sauce developed this analysis technique. "Fermilab Plant Lady," Sue Grumboski celebrated Wilted Spinach with Lemon *Graphic at top: The distribution of decay lengths her last day of work after 27 years of tending to (L ) of b quark candidates consistent with top Orzo Pilaf over 300 kinds of potted plants and trees on 2D Apple Walnut Turnovers Fermilab's campus. quark decay as observed in the CDF data. The mean of this distribution is 0.538 cm which Wednesday, January 10 "She was self-motivated and always capable to corresponds to a measured top mass of mt = 180.7 Lunch make her own decisions...she made my job as a +15.5 (stat.) ± 8.6 (syst.) GeV/c2 in agreement Chicken Curry supervisor easy," said Fermilab Groundskeeper -13.4 Steamed Jasmine Rice Bob Lootens at yesterday's cake-and-punch with the world average top mass. Sautéed Oriental Vegetables celebration in Wilson Hall. Former FESS Head Vic Coconut Flan Kuchler and Grounds Manager Mike Becker also Accelerator Update spoke at the reception: "She left her mark on this Chez Leon Menu laboratory and it's always been a good one," said December 21 - January 3 Call x4598 to make your Kuchler. "It's been a privilege and a pleasure," added Becker. "Her knowledge will be impossible - 13 stores provided luminosity to the reservation. to replace." experiments Archives - Store 5155 set a luminosity record with Photo of the Day 248.2E30 Fermilab Today - 3 quenches occurred with 2 ending stores - NuMI turned off for absorber work Result of the Week Read the Current Accelerator Update Read the Early Bird Report View the Tevatron Luminosity Charts Safety Tip of the Week Announcements ILC NewsLine Real time computing conference Mark your calendars! From April 29 to May 4, Info Fermilab will host an interdisciplinary conference on the latest real time computing applications in plasma physics, nuclear Fermilab Today is online at: Contrails: AD's Josh O'Connell used his cell www.fnal.gov/today/ phone to take this picture on December 28, just physics, astrophysics, space science, after lunch from the MI-60 service building (looking accelerators, medicine and biology. Find more Send comments and west). "There were so many contrails in the sky information here. suggestions to: that day, I couldn't even fit them all in one picture," [email protected] he writes. "Just thought I'd share with all those English Country Dancing and more people that were on vacation that week." English country dancing will meet this Sunday, January 7, at Kuhn Barn, starting at 2 p.m. In the News and will continue to meet on the first Sunday of the month through the winter and spring. The Fermilab English and Scottish country file:///U|/website/pub/v5_0/today/archive_2007/today07-01-04.html (2 of 3)1/5/2007 9:49:48 AM Fermilab Today MSNBC, dance groups are also partial sponsors of a December 29, 2006: special English country dance on Sunday Jan. 14, at 1 p.m. at the Bethany United Church of Big Science for 2007 Christ, 4250 N. Paulina, in Chicago with teaching by Jacqueline Schwab and live music Even though it’s been judged Science’s by Jacqueline Schwab, Barbara McOwen and “Breakthrough of the Year,” it’s a safe bet that Anne Hooper, noted musicians from Boston. people won’t be buzzing about the Poincare Jacqueline Schwab will also give a concert Conjecture in 2007. Instead, the coming year along with local flautist Susan Conant on is bracketed by two paradigm shifts in science, Friday, Jan. 12, at the Unitarian Universlist having to do with politics and particle physics. Society of Geneva, 102-110 S. Second St. in Geneva. Please contact [email protected] At the beginning of the year, control of or call 630-584-0825 or 630-840-8194. For Congress changes hands from the GOP to the concert information and tickets, go to the Democrats. And by the end of the year, the Large Hadron Collider should be online at last website. at CERN's headquarters on the French-Swiss Upcoming Activities border. You might not think of last month's midterm congressional elections as a science story, but the outcome is likely to have an effect on how a whole range of science policy issues are handled. Here are the three top examples.... Read More file:///U|/website/pub/v5_0/today/archive_2007/today07-01-04.html (3 of 3)1/5/2007 9:49:48 AM.
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