FACES AND PLACES

U S l a b n e w s SLAC and Jefferson Lab see changing faces

Movers and shakers (from left to right): Jonathan Dorfan, Christoph Leemann, Andrew Hutton and Elke-Caroline Aschenauer.

Jonathan Dorfan, who has been director of various leadership positions, after coming led. Ultimately Hutton went on to pursue SLAC for nearly eight years, has announced to the laboratory from the Lawrence his interest at CERN at the Large Electron– that he will step down in the autumn. Berkeley Laboratory in 1985, attracted Positron collider, at the SLAC Linear Collider Dorfan has overseen the laboratory since by the opportunity to build a new facility and at the PEP-II B‑factory, before arriving September 1999. Prior to that, he served as and a new organization on a green site. He at Jefferson Lab in 1993 to lead the SLAC associate director and as director of was instrumental in the design, technology commissioning of CEBAF. the B‑Factory Project from 1994 to 1999. choice, and construction of the Continuous Jefferson Lab has in the meantime He will continue to be involved at SLAC and, Electron Beam Accelerator Facility (CEBAF). welcomed a new face with the appointment once a new director is named, will assist in Also at Jefferson Lab Andrew Hutton, the of Elke-Caroline Aschenauer as the 12 GeV the transition to the new leadership. Dorfan’s long-time deputy associate director of the Upgrade Hall D Leader in December. She achievements during his directorship include Accelerator Division has stepped into the is also a member of the 12 GeV Upgrade creating the Kavli Institute for Particle role of associate director. He takes over project team. Aschenauer was previously at Astrophysics and Cosmology at SLAC and from Swapan Chattopadhyay who served the Max Planck Institute for Nuclear Physics securing the world’s first X-ray free-electron in that position from 2001, before joining in Heidelberg, Germany, and since August laser, the Linac Coherent Light Source, which the UK’s Cockcroft Institute as its inaugural 2003 she has served as the spokesperson is under construction (p9). director in March. Hutton’s interest in for the HERMES collaboration (CERN Courier At the Thomas Jefferson National accelerators dates back to growing up in April 2006 p26). For HERMES she monitored Accelerator Facility, Christoph Leemann has England, when Hal Gray, after whom the day-to-day data taking and supervised announced that he will be stepping down unit of absorbed radiation dose is named, an analysis of hadron multiplicities in as director after six-and-a-half years at the allowed him to go after school to work on a semi-inclusive DIS using the RICH to tune helm of the research facility. Leemann has small research electron linear accelerator fragmentation parameters in the HERMES served Jefferson Lab for almost 22 years in at the cancer-research institute that Gray Monte Carlo.

P u b l i c a t i o n s He will head the APS editorial office located Sprouse takes over at Physical Review in eastern Long Island, near Brookhaven National Laboratory. With a staff of 150, The American Physical Society (APS) has superconducting linac and has been director the office annually receives and processes appointed Gene D Sprouse, professor of of the Nuclear Structure Laboratory since peer reviews for nearly 30 000 physics physics at Stony Brook University, as its new 1996. The position of editor-in-chief is one of manuscripts, two thirds of which originate editor-in-chief. Sprouse will succeed Martin three co-equal operating officers of the APS, outside the US. The office also manages an Blume, who has held the position for 10 years. and includes primary responsibility for the electronic archive of the 400 000 Physical Sprouse helped to build the Stony Brook Physical Review series of physics journals. Review articles published since 1893.

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A w a r d s Franklin Institute rewards Totsuka and McDonald

The Franklin Institute in Philadelphia Ontario, is director of the Sudbury Yoji Totsuka (left) and Arthur McDonald. has awarded its 2007 Benjamin Franklin Observatory (SNO) Institute, while Totsuka, Medal in Physics to Yoji Totsuka and Arthur from the , is former oscillations. More recently SNO found McDonald for discovering that the three director of the , home evidence for oscillation in solar , known types of neutrino change into one to the Super-Kamiokande neutrino detector. resolving the long-standing solar-neutrino another when travelling over long distances, The Kamiokande collaboration first problem (see p26). The Franklin Institute and that neutrinos have mass. The institute’s reported the detection of a deficit in the also recognized solar-neutrino physics in awards date back to 1824, when the number of atmospheric muon neutrinos 2003, with the award of the Franklin Medal institute was founded to train artisans in 1988. A decade later the Super- in Physics to John Bahcall, Raymond Davis and mechanics in the fundamentals of Kamiokande collaboration announced and (CERN Courier July/ science. McDonald, from Queen’s University, the discovery of atmospheric neutrino August 2003 p34). HESS collaboration wins Descartes Prize NIM rewards two young scientists at Vienna conference

Two young researchers shared the NIMA Young Scientists’ Award at the 11th Vienna Conference on Instrumentation held in February. The award, for scientists under 35 who have contributed a paper or poster at the conference, is sponsored by Nuclear Instruments and Methods in Physics Research, Section A. This year the International Advisory Committee selected Representatives of HESS at the Descartes Prize ceremony, together with Annette Xavier Llopart from CERN and Nahee Park Schavan (left), the German research minister, Janez Potoc˘nik (third from right), the from Ewha Womans University in Seoul. Commissioner for Science and Research of EU, and Claudie Haigneré (second from right), Llopart, who works on the Medipix project at chair of the Grand Jury of the Descartes Prizes. (Courtesy European Community.) CERN, won the award “for the development of pixel readout chips for a wide range of The High Energy Stereoscopic System (HESS) high-energy gamma rays. Since starting instrumentation applications”; Park received collaboration has received the prestigious EU operation in 2002, results from HESS have her award “for substantial contributions Descartes Prize for Research at a ceremony provided a number of breakthroughs, such to the CREAM balloon experiment and in Brussels on 7 March. Launched in 2000, as the first resolved image of a supernova outstanding presentation of her work”. the prize rewards teams of scientists for shock wave acting as a cosmic particle outstanding scientific or technological results accelerator, the detailed study of high-energy achieved through transnational research in radiation from the centre of our galaxy, and any field of science. the discovery of a stellar black hole – a The HESS collaboration involves about “microquasar” – generating gamma rays. 100 scientists from Armenia, the Czech HESS shares the prize with two other Republic, France, Germany, Ireland, Namibia, projects: Hydrosol, which has developed a Poland, South Africa and the UK. It operates way to produce hydrogen from water-splitting an array of four big Cherenkov telescopes using solar energy, and APOPTOSIS, which in Namibia, which are the most sensitive has made great strides in the understanding Nahee Park (left) and Xavier Llopart (right) telescopes in the world for studying very of apoptosis (programmed cell death). receive their awards at the conference.

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Royal Irish Academy A n n i v e r s a r y makes Weinberg an Zatsepin celebrates 90 years

honorary member George Zatsepin, pioneer of cosmic-ray physics and neutrino astrophysics, celebrates his 90th birthday on 28 May. He is probably best known for the Greisen–Zatsepin–Kuzmin effect, published in the 1970s, which is the subject of many experimental and theoretical studies throughout the world. In the early 1950s, in work on the nuclear nature of extensive air showers, Zatsepin created the equations for particle propagation through the atmosphere. His “next-generation George Zatsepin, who turns 90 in May. principle” assumes that the characteristics of secondary particles produced in nucleon–air scintillator detector in Artyomovsk, and the nucleus interactions depend only on the Italian–Russian Liquid Scintillator Detector Steven Weinberg, who receives honorary portion of energy taken away by a secondary under Mont Blanc. He remains a head of the membership of the Royal Irish Academy. particle – an effect found later in experiments Large-Volume Detector experiment in the on accelerators and named “scaling”. Gran Sasso National Laboratory. The Royal Irish Academy has made Steven Many experiments have realized Zatsepin’s Zatsepin has long held the cosmic-ray chair Weinberg, Nobel laureate and professor at ideas in neutrino physics and astrophysics. of the physics department of Moscow State the physics and astronomy departments of He is a leader of the Russian–American University, where he helped to create the the University of Texas, Austin, an honorary gallium germanium experiment, SAGE, emulsion detector group and the international member. The academy was founded in which has studied the solar neutrino Pamir Collaboration. As head of the neutrino 1785, and continues to serve as the national flux for 15 years at the Baksan Neutrino physics and neutrino astrophysics department academy of arts and sciences for Northern Observatory. He was the first to suggest of the Institute for Nuclear Research of the Ireland and the Republic of Ireland. Weinberg measuring the neutrino flux from collapsing Russian Academy of Sciences he created an joins just 14 scholars at American universities stars and was a leading figure in the important school of physicists working on who are honorary members of this academy. Baksan neutrino telescope, the 100 tonne cosmic-ray and neutrino physics.

C e n t e n a r y Dubna symposium honours the memory of Norair Sissakian

The III International Symposium “Problems of movement of scientists for peace. Biochemistry, Radiation and Space Biology” About 150 scientists, not only from Russia took place on 24–28 January in Dubna. This but also from Italy, Canada, the US and CIS year the symposium was dedicated to the countries (Armenia, Georgia, Belarus and centenary of Norair Martirosovich Sissakian Ukraine), attended the symposium. The (1907–1966), an eminent researcher and opening ceremony took place on 25 January biochemist, one of the founders of space at the President Hall of the Russian Academy biology, and an outstanding organizer of of Sciences (RAS), with talks from many global scientific cooperation. outstanding scientists and researchers. For a number of years Sissakian was chief ● The symposium was organized by the scientific secretary of the Presidium of the RAS, the RAS Department of Biological USSR Academy of Sciences and academician- Norair Martirosovich Sissakian, 1907–1966. Sciences, the Bach Institute of Biochemistry secretary of the Department of Biological of RAS, the RF State Scientific Centre Sciences. On the global scene he was vice- session of the UNESCO General Conference; (SSC) – Institute of Biomedical Problems, president of the International Academy of some 40 years later, the 33rd session the National Academy of Sciences of Astronautics, and chair of the committee decided that the centenary of his birth the Republic of Armenia, Yerevan State on bioastronautics of the International should be included in the list of anniversaries University, the Dubna International University Astronautics Federation. In 1964 he was associated with UNESCO in 2006–2007. He of Nature, Society and Man and the Joint unanimously elected president of the 13th was also an active member of the Pugwash Institute for Nuclear Research.

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O b i t u a r i e s Simon Peter Rosen 1933–2006

Simon Peter Rosen, 73, died on 13 October on right-handed couplings of Majorana 2006 at his home in Rockville, MD, after a neutrinos, and on exotic processes such as battle with pancreatic cancer. Majoron emission. Peter had been senior advisor to the Peter also found time to serve on both director of the Office of Science in the the university and the School of Science Department of Energy (DOE) since 2003. promotion committees and as president From 1997 to 2003, he was associate of the Purdue chapter of the American director of the Office of Science, with Association of University Professors. He responsibility for high-energy and nuclear enjoyed tennis and squash and was a physics. Highlights of his tenure include tenacious competitor – a trait also apparent the discoveries of neutrino oscillations and in his physics, where he relished debate with dark energy, construction of the B-Factory friends and colleagues. and the Relativistic Heavy Ion Collider, and On leave from Purdue, Peter served as a the signing of a US–CERN agreement for US theoretical physicist at two federal agencies: participation in the LHC. ERDA (1975–77) and the National Science An authority on neutrino oscillations and Simon Peter Rosen, who died in October. Foundation (1981–83). He moved from neutrinoless double beta decay, Peter was Purdue to the Theoretical Division of Los also a gifted spokesman for particle and promoted to associate professor in 1963 and Alamos National Laboratory (1983–90), nuclear physics. Even while undergoing to professor in 1966. His research focused where he helped to organize an unsuccessful three years of intensive cancer therapy, he heavily on implications of various symmetry proposal to mount a US gallium solar- continued his efforts, writing and speaking principles for the weak interactions. neutrino experiment. He also collaborated about the importance of physics and finding These included the application of unitary with James Gelb on the implications of DOE support for two NOVA programmes. symmetries to non-leptonic hyperon decays the newly discovered Mihkeyev–Smirnov– In September 2006, one month before and tests of lepton number conservation Wolfenstein mechanism for matter-enhanced his death, CERN Courier published Peter’s in semi-leptonic decays. Following the neutrino oscillations. In anticipation of the eloquent tribute to Ray Davis, whom he discovery of neutral weak currents in the mid- Superconducting Supercollider, Peter left Los called “discoverer and grand pioneer of 1970s, Peter co-authored a series of papers Alamos to become dean of science at the the solar-neutrino problem” (CERN Courier with Boris Kayser, Gerry Garvey, Ephraim University of Texas at Arlington (1990–96), September 2006 p32). Fischbach and others on tests to determine establishing a high-energy-physics group in Peter was born in August 1933 in London, the space–time structure of the neutral the physics department. UK, and became a US citizen in 1972. current using data from reactions such as Peter was a fellow in the American Physical Earning a PhD in physics at Oxford in 1957, elastic neutrino–proton scattering. Society and the American Association for he began his career at Washington University At Purdue and throughout his career, the Advancement of Science. In 2000 he in St Louis, MO, where he became well Peter returned many times to the theory of became professor emeritus of the University known for his work with Henry Primakoff on double beta decay, a problem that became of Texas at Arlington and in 2004 received an the theory of double beta decay. Peter then increasingly important as the evidence for honorary degree from Purdue University. moved to Midwestern Universities Research massive neutrinos grew. Peter’s work helped Peter is survived by his wife Adrienne, his and spent a year as a NATO Fellow at Oxford. connect experimental bounds to physics son Daniel and his daughter Sarah. In 1962, he joined Purdue University as beyond the Standard Model: constraints Ephraim Fischbach, Sandip Pakvasa, and an assistant professor and rose rapidly, placed on the neutrino mass matrix, Wick Haxton. Willy van Neerven 1947–2007

Willy van Neerven died on 15 February 2007. on 3 May 1947. He received his PhD at University, ETH Zurich, Tallahassee, YITP He held a position at the Lorentz Institute of Nijmegen University in 1975, carrying Stony Brook and DESY. From his early years Leiden University and a special professorship out thesis studies under the supervision at CERN and NIKHEF onwards he performed at the Vrije Universiteit Amsterdam, working of R P Van Royen and J J de Swart. As a groundbreaking calculations within as a theoretical particle physicist. postdoctoral fellow and during long-term perturbative quantum field theory. Willy was born at Weert in the Netherlands visits he worked at CERN, NIKHEF, Dortmund He was involved in developing important

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aspects of quantum electrodynamics (QED), have been impossible. quantum chromodynamics (QCD) and the Willy was a driven teacher to the benefit Standard Model. He developed specific of his students and collaborators. He was calculation technologies and performed a equipped with a fabulous encyclopaedic large number of complete calculations at knowledge of many facets of quantum field the one- and two-loop level, including those theory, and also of scientific literature, with different mass scales and polarized often down to the volume number, as initial states. well as of historic facts down to dates. Willy played a leading role in calculating We all remember conversations with him, the two-loop QED-corrections for the Large especially on walks, during which he enjoyed Electron–Positron collider, which were a good cigar; besides being pleasant they instrumental in establishing all precision offered a great way to analyse current measurements at the Z peak. His pioneering scientific problems with his collaborators. work on the QCD-Wilson coefficients for the In his reasoning he was strict but not at deeply inelastic structure functions, also all dogmatic. His aim was to understand a including those for heavy flavours, formed a physics problem to the very end, whenever milestone in QCD and was instrumental for possible. Willy understood physics interpreting the experimental data at HERA. Willy van Neerven, who died in February. thoroughly as quantitative science and He performed one of the first calculations of therefore only accepted theories that could the polarized next-to-leading-order anomalous of central importance for the physics at the be tested by experiment. dimensions. His work in collider physics Tevatron and the LHC. He also calculated the He will be greatly missed by friends and covered the celebrated two-loop calculations next-to-leading QCD corrections to the top- colleagues alike. of the cross-sections for the Drell–Yan quark cross-section. Without his efforts much P van Baal, J Blümlein, P Mulders, process and for Higgs production, which are of the precision analysis of the data would A Schellekens, J Smith and J Vermaseren.

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