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The Bulletin Vol. 62 the Vol. 62B - No. 29 ulletin August 22, 2008 Traveling the World To Study Neutrinos BNL’s Hahn Talks at ACS National Meeting Michael Creutz Honored Internationally In the quest trinos’ role in for a better un- the universe. With Gian Carlo Wick Gold Medal derstanding BNL’s history Michael Creutz, a BNL physi- one of nature’s of solar neu- cist, has been chosen by the most “ghostly” trino research World Federation of Scien- elementary par- dates to the tists (WFS) as the recipient ticles — the early 1970s, of the 2008 Gian Carlo Wick neutrino — sci- when scientist Gold Medal Award, which is entists at BNL Ray Davis’s pio- given annually to a theoreti- are spreading neering work cal physicist for outstanding their expertise showed that contributions to particle from the mines fewer electron physics. Creutz will receive of Canada to neutrinos (the the award at a WFS meeting D0270808 t h e m o u n - D0260708 type produced held in Erice, Italy, August tains of China. by the sun) were 19–24. Richard Hahn, detected than Founded in 1973, the WFS Chemistry De- should have is an association of more partment, dis- been, based on than 10,000 scientists from Joseph Rubino cussed some Joseph Rubino theory. Davis, 110 countries whose aim is of the neutrino’s mysterious with Masatoshi Koshiba of Ja- to share knowledge among Creutz said. “Also, I am proud tum chromodynamics (QCD), properties and two new neu- pan and Riccardo Giacconi of all nations so that everyone to be the recipient of an award a theory that describes the trino research projects at the the U.S., was awarded a Nobel can experience the benefits of named after Gian Carlo Wick. interactions of subnuclear 236th National Meeting of the Prize in physics in 2002. scientific progress. Gian Carlo I was not yet at the Labora- particles. Specifically, Creutz American Chemical Society on That same year, scientists at Wick (1909-1992), a native of tory when he worked here, first demonstrated that prop- Tuesday, August 19, in Philadel- the Sudbury Neutrino Observa- Italy, was an eminent theo- but I met him when I was a erties of QCD could be com- phia, Pennsylvania. tory (SNO) in Ontario, includ- retical physicist who led the child because my father, Ed puted numerically on a four- Neutrinos are uncharged ing Hahn and members of his theory group at Brookhaven Creutz, then head of the phys- dimensional lattice through elementary particles created by BNL group, solved Davis’s “so- Lab from 1958 to 1970. ics department at Carnegie computer-based calculations nuclear reactions in the sun, by lar neutrino problem” by deter- “I am honored to have Tech — now Carnegie Mellon known as Monte Carlo tech- cosmic rays in the atmosphere, mining that neutrinos “oscil- been chosen to receive this University — hired him as a niques. and in nuclear reactors and late,” or switch, between three award and to be in the compa- faculty member.” In 1974, Nobel laureate accelerators on Earth. Their different types as they travel ny of the esteemed scientists Michael Creutz was cited Kenneth Wilson of Cornell properties continue to fascinate from the sun to Earth. Thus, who received it previously,” for his work on lattice quan- See Creutz on pg. 2 the scientists who analyze neu- See Hahn on pg. 2 Rare K Decay Update, New Findings Physicists Find Three More Candidates of Extremely Rare Process An international team of physi- cists examining an extremely rare form of subatomic particle decay has discovered additional evidence for this process, which is highly sensitive to new forces beyond those incorporated in the Standard Model of particle Joseph Rubino physics. The innovative experi- ment, called “E949/E787” for its experiment numbers, is located at BNL. Three new can- Roger Stoutenburgh didate events were found, bring- CN 7-3-97 ing the total observed to seven since the first sighting in 1997. The result has been submitted to 1997 E787 team including many international collaborators Physical Review Letters, and was presented at a colloquium on Below: Members of the E949 team from TRIUMF, Canada’s D0580304 Tuesday, August 19, in the Phys- National Laboratory for Particle & Nuclear Physics, and the Uni- versity of British Columbia, including Joss Ives (fifth from left) ics Department. This research was funded Taken in 2004, this photo shows many members of the E949 rare K decay by the Office of High Energy experimental team, including David Jaffe (front, fourth from left) Benji Lewis Physics within DOE’s Office of (middle, fifth from left), and Ilektra Christidi (front, fifth from left), who, with Science, with additional support Zhe Wang and Joss Ives, concluded the recent analysis. Steven Kettell, co- from the Natural Sciences and spokesperson for E949, is front, second from right, and Laurence Littenberg, Engineering Research Coun- co-spokesperson for the predecessor experiment E787 that found the first three cil and the National Research events, is front, third from left. Council of Canada, through U.S.-Japan and U.S.-Russia joint of the most interesting decay Kettell of Physics. “The study and E787 data, seven events in funding programs for collab- processes to study. of these low-energy events is total, indicates that the K+_π+__ orative research in high energy K+ mesons exist for only 12 challenging due to background process occurs once in every 5.8 physics, and the Chinese Minis- billionths of a second before processes that can mimic the billion decays —twice as often as try of Education. decaying. So to catch the fleet- K+ → π+ νν process, so we had predicted by the Standard Mod- The experiment discovered ing events and identify the to develop increasingly sophis- el. If confirmed with improved an extremely rare form of dis- rare decay, the scientists built a ticated analysis techniques to precision by future experiments, integration of an unstable sub- state-of-the-art particle detector exploit the full features of the a deviation this large would be atomic particle called a K meson the size of a small house, ca- detector to help exclude these impossible to accommodate in into three other particles — pable of examining 1.6 million background events.” the Standard Model, and would a positively charged pion (π+), decays every second. Interesting The team that performed signal the existence of new fun- which is observed, and an un- events are recorded, and physi- the analysis obtaining the new damental physics effects. Zhe Wang, Physics Department seen neutrino (ν)-antineutrino cists use sophisticated data-min- result was led by David Jaffe, The experimental collabora- E949 team member (ν) pair. This process (written ing techniques to pore over the BNL Physics, and included Zhe tion — composed of 70 scientists K+ → π + νν) is predicted by data to find the most promising Wang, BNL Physics postdoc; from Canada, Japan, Russia and Ion Collider, another particle the Standard Model to occur events and examine them in ex- and three graduate students: the United States — has been accelerator devoted to nuclear only once in every 12 billion quisite detail. Benji Lewis, University of conducting the search for the physics research. decays, making it one of the “This is the first time that New Mexico; Ilektra Christidi, past decade. Data collection Further study will have to rarest decay processes ever any experiment has had Stony Brook University; and concluded in 2002 when the await a new generation of experi- observed. Its rate is extremely enough sensitivity to observe Joss Ives, University of British Alternating Gradient Synchro- ments in Europe or at a new ac- sensitive to new physical ef- candidate events in a region Columbia, Canada. tron accelerator used for this celerator in Japan where the BNL fects not accounted for in the with lower energy pions,” Kettell explained that the research became a dedicated experimental apparatus is to be Standard Model, making it one said E949 spokesperson Steve current result, based on all E949 injector to the Relativistic Heavy sent. — Karen McNulty Walsh The Bulletin August 22, 2008 CALENDAR This is Your Life [Number]! OF LABORATORY EVENTS After submitting an appli- On July 7, 2008, the Re- • The BERA Store in Berkner Hall is open week- cation and going through cords Group, which consists days from 9 a.m. to 3 p.m. For more informa- the interview and hiring of Louisa Barone, Diane Di- tion on BERA events, contact Andrea Dehler, Ext. 3347, or Christine Carter, Ext. 2873. processes, a new employee at Blasi and Darlene Peragine, • Additional information for Hospitality Com- the Lab is assigned his or her issued life number 24000. mittee events may be found at the Lollipop life number. Who is employee number House and the laundry in the apartment area. • The Recreation Building #317 (Rec. Hall) Life numbers are exactly 24000? is located in the apartment area. what their name implies — Meet Michelle Scaduto, • Events flagged with an asterisk (*) have an a unique number issued to an who holds BNL employee life accompanying story in this week’s Bulletin. employee for life. It means number 24000. Scaduto will — EACH WEEK — that even if that employee has be working as an administra- a break in Lab service and then tive secretary at the National Weekdays: Free English for Speakers Joseph Rubino Of Other Languages Classes is re-employed by the Lab, Synchrotron Light Source II. Beginner, Intermed., Adv. classes, various they will use the number orig- “I was so excited about times. All welcome. Learn English, make friends. See www.bnl.gov/esol/schedule. inally issued to them. And the beginning my new job here at html for schedule.
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