Fermilab Today

Thursday, Oct. 21, 2010

Calendar Feature Result of the Week

Have a safe day! APS honors Fermilab’s Measurement of W spin Thursday, Oct. 21 Eichten and Quigg with from CDF top quark 10 a.m. 2011 Sakurai Prize decays Diversity Council Lecture - Ramsey Auditorium Speaker: Laura Lewis-Barr Title: Dealing with Difficult People 2:30 p.m. Theoretical Physics From left: Chris Quigg, Ken Lane, Ian The above diagram shows the top quark at rest Seminar - Curia II Hinchliffe and Estia Eichten will receive the and decaying into a W boson and a b quark. In Speaker: Antonio Delgado, 2011 Sakurai Prize for their famous paper, the top quark rest frame, the W boson and b "Supercollider Physics." University of Notre Dame quark move back-to-back, as shown by the yellow arrows. This image also shows the Title: The S-MSSM: The More than 25 years ago, four theorists directions of spin for the top quark (green Singlet Saves the Day spent many a late night drafting a map for hadron colliders to explore energy regions arrow), b quark (blue arrow) and W boson (red 3:30 p.m. arrow) for three different spin states of W at the Tevatron and beyond. Their efforts DIRECTOR'S COFFEE boson. A more technical plot is available here. resulted in producing the ultimate BREAK 2nd Flr X-Over At the Tevatron, top quarks are guidebook that influenced the design and THERE WILL BE NO predominantly produced with an anti-quark. ACCELERATOR early analyses from particle accelerators PHYSICS AND and experiments over the past two In the Standard Model, all other quarks TECHNOLOGY SEMINAR decades and still has a large impact today. produced in collisions first combine with one another to form bound states before TODAY The American Physical Society will honor decaying to lighter quarks or interacting in these four theorists, Estia Eichten of Friday, Oct. 22 the detector. This complicates scientists' Fermilab, Ian Hinchliffe of Lawrence 3:30 p.m. study of the quarks' properties. DIRECTOR'S COFFEE Berkeley National Laboratory, Kenneth BREAK - 2nd Flr X-Over Lane of Boston University and Chris Quigg However, as a result of its large mass, the 4 p.m. of Fermilab, with the 2011 J. J. Sakurai top quark's lifetime is a trillionth of a Joint Experimental- Prize for Theoretical Particle Physics. They trillionth of a second. This provides us with will receive the prize for their work “to chart Theoretical Physics a clean way to test the Standard Model and a course for the exploration of TeV scale Seminar - One West to probe for possible new physics. physics using multi-TeV hadron colliders,” Speaker: Ofer Lahav, The idea of spin is familiar. A common according to the APS citation. University College London example is that of the Earth, which rotates Title: Testing the Dark “Their work has been the physics bible for about an axis tilted 23.5 degrees. The tilt of Energy Paradigm with the all of us,” said Fermilab Director Pier the Earth's rotation is responsible for the Dark Energy Survey Oddone. “It has told us about the physics four seasons. Determining the direction of (in conjunction with the to come, and now we are about to find out the spin is important both on our scale and Dark Energy Survey what nature has in store for us. Their also on the scale of particle physics. collaboration meeting) efforts are still very valuable to the field of Measuring the properties of the W boson Click here for particle physics today, and this recognition resulting from top quark decay, such as NALCAL, couldn't come at a more appropriate time." spin, allows us to test the theoretical predictions of quantum mechanics and a weekly calendar Read more with links to particle physics. The spin of the W is additional defined as the orientation of its spin axis, or information. vector, in relation to its direction of motion. The spin of the W is restricted by quantum Upcoming mechanics and can only take a set of conferences discrete values relative to its direction of motion: right-handed, left-handed or

file:///U|/Dead%20Today/Archive/today10-10-21.html[10/21/2010 9:20:10 AM] Fermilab Today

From left: Estia Eichten, Ian Hinchliffe, Ken Campaigns longitudinal (in the direction of motion). Lane and Chris Quigg at the 1984 Snowmass Summer Study on the Physics of the In the Standard Model theory the fraction of Superconducting Super Collider, the Take Five events with right-handed spin (f+) is almost conference where the authors first presented Tune IT Up their paper. zero while the fraction of events with longitudinal spin (f0) is about 70 percent. If they exist, new particles or new forces Weather -Elizabeth Clements might make the fraction of longitudinal and Special Announcement right-handed events significantly different Sunny from the Standard Model expectation. 58°/33° Dealing with difficult CDF has adapted a powerful analysis Extended Forecast technique originally used to precisely Weather at Fermilab people: administrative event today determine the top-quark mass (Fermilab Today for Aug. 10, 2006) to instead Current Security An event to help determine these W spin fractions in events Status administrative containing both a top quark and anti-top employees learn skills quark pair. Secon Level 3 to best deal with difficult people will This technique allows us to make more Wilson Hall Cafe take place at 10 a.m. precise measurements in comparison to today in Ramsey other analyses for this measurement. From a sample of 828 candidate events Thursday, Oct. 21 Auditorium. CDF determines using a model independent - Breakfast: apple sticks During her 90-minute fit to the data. - Minnesota wild rice w/ workshop, speaker f0 = 0.879 with an uncertainty of ± 0.123, chicken Laura Lewis-Barr will f+ = -0.151 with an uncertainty of ± 0.088. - Tuna melt on nine grain teach strategies and - *Italian meatloaf skills to work more effectively and This result, recently published in Physical - Chicken casserole efficiently with difficult people. The Review Letters, is based on 2.7 inverse - Buffalo krispy chicken workshop will cover meeting the service fentobarns of CDF data. It is the most wrap and psychological needs of customers, precise measurement of the longitudinal - Assorted sliced pizza recognizing emotional messages in others spin so far and agrees with expectations for - Mandarin chicken and ourselves and using strategies and the Standard Model. techniques to defuse conflict situations and *Carb restricted alternative More information convert angry customers into happy ones. Wilson Hall Cafe Menu -- Edited by Andy Beretvas and GP Yeh All administrative professionals are Chez Leon welcome.

Thursday, Oct. 21 Feature Dinner - Crab cakes w/ red pepper Climatologist to talk mayonnaise Friday about the future of - Medallions of beef climate - Potato cups - Sauteed zucchini - Grand Marnier souffle Front row from left: Mousumi Datta and Chez Leon Menu Douglas Glenzinski, Fermilab. Second row Call x3524 to make your from left: Florencia Canelli, University of reservation. Chicago and Fermilab; and Ricardo Eusebi, Texas A&M. Archives

Fermilab Today Special Announcement Director's Corner While fossil fuels and carbon emissions Chickenpox spotted at Result of the Week have become buzzwords in the climate laboratory Safety Tip of the change debate, the story of how that A laboratory employee was diagnosed with carbon is affecting the Earth is not always chickenpox this week. The virus is spread file:///U|/Dead%20Today/Archive/today10-10-21.html[10/21/2010 9:20:10 AM] Fermilab Today

Week clear. In his lecture on Oct. 22, “The Long primarily through contact with the infected CMS Result of the Thaw: How Humans are Changing the individual while the person has the rash or Next 100,000 Years of Earth’s Climate,” Month five days prior to that. Individuals who have Dr. David Archer, one of the world’s had chickenpox in the past or have been User University leading climatologists, will present some of vaccinated are unlikely to contract the virus. the latest scientific findings on how carbon Profiles Learn more about chickenpox here. is cycled between the atmosphere, the ILC NewsLine ocean and the land. Accelerator Update Archer is a professor in the Department of Info the Geophysical Sciences at the University Oct 18-20 of Chicago, where he studies Earth’s - Four stores provided ~29 hours luminosity Fermilab Today carbon cycle and its interaction with global - Pelletron problems required access to is online at: climate. In his research and writing, he has repair www.fnal.gov/today/ addressed the complexity of the global - TeV F4 pond water pump strainer clogged carbon cycle. The more fossil fuel is Send comments and - Vacuum valves closing caused TeV abort burned, the more this balance shifts toward suggestions to: - Recycler, MiniBooNE, Pbar, and Booster CO in the atmosphere. The effects of this [email protected] 2 accesses imbalance could last for hundreds of Visit the Fermilab thousands of years. This is dangerous Read the Current Accelerator Update home page news for the ice sheets in Antarctica and Read the Early Bird Report Greenland, which, if melted, could View the Tevatron Luminosity Charts Unsubscribe from Fermilab ultimately raise sea level by tens of meters. Today Announcements Archer is the author of several outreach books on climate change, including “The Global Carbon Cycle,” a primer in climate Latest Announcements science; the award-winning “The Long Employee Art Show: April 2011 Thaw;” and several college texts for non- science majors. He teaches classes on Fermilab Arts Series presents global warming, environmental chemistry Project Trio: Greg Pattillo and global biogeochemical cycles, and is (beatbox flute); Eric Stepheson regular contributor to the climate science (cello); and Peter Seymour (jazz blog site realclimate.org. bass)

The lecture is at 8 p.m. in Ramsey Auditorium. Admission is $7. The event is Accepting nominations for sponsored in part by the Chicago Council Director's Award on Science and Technology (C2ST), an organization which provides a forum for Toastmasters - Oct. 21 Chicago's scientific leaders to discuss Argentine Tango through Nov. 3 current issues in science. Accelerate to a Healthy Lifestyle Learn more program

In the News Fright Fest discount tickets at Six Flags

Heavy atoms set to Chicago Blackhawks discount collide at the LHC tickets From New Scientist, Oct. 20, 2010 Regal Movie Theater discount tickets available The world's most powerful particle smasher is moving on to heavy ions in its bid to GD&T Introduction and explore the universe's first microseconds. Fundamental Principles class - Oct. 28 & 29 The Large Hadron Collider at CERN, near Geneva, has already met its 2010 target PowerPoint 2007: New Features for the number of proton collisions. It is set class - Oct. 28 to start colliding lead ions in November. Outlook 2007: New Features class "It's one of the largest steps that any - Oct 28 collider has made over its predecessor,

file:///U|/Dead%20Today/Archive/today10-10-21.html[10/21/2010 9:20:10 AM] Fermilab Today

Introduction to COMSOL possibly the largest in history," says John Multiphysics 4.1 and Its Jowett, head of heavy ion operations at Electromagnetic Waves Simulation the LHC. As the ions smash into each Capabilities tutorial - Oct. 26 other they will create a fireball of the quarks and gluons that make up protons Facilitating Meetings That Work and neutrons. The collision energies class - Nov. 4 should far outstrip those achieved by the current record holder, the Relativistic Management and Negotiation Skills Heavy Ion Collider (RHIC) at Brookhaven class - Nov. 9 & 16 National Laboratory in New York. Word 2007: Intro class - Nov. 9 Read More

file:///U|/Dead%20Today/Archive/today10-10-21.html[10/21/2010 9:20:10 AM]