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CERNCOURIER Www CERN Courier July/August 2016 CERN Courier July/August 2016 Faces & Places Faces & Places with recent studies of beta functions opening V ISITS O BITUARIES the door for light sources to replace the Sophia Bennett traditional and lengthy orbit response Austria’s minister for techniques with fast turn-by-turn-based labour, social affairs and Péter Hasenfratz 1946–2016 optics corrections. consumer protection, At the high beam-power front, the Alois Stöger, visited Spallation Neutron Source in the US has CERN on Wednesday Péter Hasenfratz was born in Budapest, contributed to our understanding of chiral reached 1.4 MW and launched a study to 8 June, during which Hungary on 22 September 1946. He studied symmetry on the lattice. While cleaning double the power at 1.3 GeV. Meanwhile, he toured the ATLAS physics at Eötvös University, fi nishing up his offi ce in 1997, he discovered an old Ruth Bestgen Ruth the European Spallation Source in Sweden, cavern with experiment his PhD in 1973, and in 1975 he took up preprint by Paul Ginsparg and Kenneth which is based on an unprecedented 5 MW spokesperson Dave a postdoc position under Gerard 't Hooft Wilson from 1982 that contained the now linear accelerator that will reach an energy Charlton (right). in Utrecht. He then returned to Budapest, famous Ginsparg–Wilson relation, which of 2 GeV using superconducting RF cavities, before moving to the CERN Theory turned out to hold the key to understanding is well into construction and progressing Division in 1979. chiral symmetry. By constructing a novel towards fi rst beam in June 2019. Accelerating Péter then began to work on fi eld theory solution for this relation, Péter breathed new superconducting cavities based on Nb3Sn regularized on a space–time lattice. In life into this old paper and today, with more (the same material being explored for the Sophia Bennett 1980, together with his younger sister Anna, than 950 citations, it has become one of the HL-LHC and FCC magnets) have now been The Rt Hon Hugo Swire MP, he presented the fi rst correct computation of most cited papers in lattice fi eld theory. shown for the fi rst time to outperform Nb minister of state, Foreign and the scale parameter of QCD on the lattice. He had always wished that he could cavities, defi ning the next generation of Commonwealth Offi ce, UK, In 1982 he organized the fi rst international witness the discovery of the Higgs superconducting RF technology. in the LHC superconducting workshop on lattice fi eld theory at CERN, boson, since he had a special interest in Other highlights from the Korea event magnet test hall with head of sending handwritten invitations to each of electroweak symmetry-breaking, and included developments at J-PARC in Japan, the beams department Paul the participants. He had planted the seed his wish was granted in 2012 – one year where the rapid-cycling synchrotron is Collier (right) on 9 June. for a new scientifi c community, and today after his retirement. Tragically, after this approaching routine 1 MW operation several hundred people meet annually at the most remarkable scientifi c career, rapidly and the main 50 GeV ring is delivering a lattice conferences. Péter Hasenfratz was a member of the advancing Alzheimer’s disease probably 400 kW beam for long-baseline neutrino In 1984 he went to the University of Bern, CERN Theory Division from 1979–1984. prevented him from fully appreciating the experiments. There was also a session and from 1999–2001 he was the director of scientifi c signifi cance of this discovery. devoted to engagement with industry, which the Institute for Theoretical Physics there. fi eld theory. He often calculated things Péter was an extraordinary scientist and an is crucial for the high-luminosity LHC, and His lectures, not only in Bern but also at analytically that had seemed incalculable extremely friendly, kind person. He passed a report from PACMAN – a Marie-Curie numerous international schools, have been before, such as the exact value of the away peacefully at home on 9 April, leaving network based at CERN that is pushing Maximilien Brice described as a revelation by participants. dynamically generated mass gap in several behind his wife Etelka, their four children, the limits of technology in component On 14 June, the Japanese Péter was extremely creative and made 2D asymptotically free quantum fi eld six grandchildren, and his sister Anna. alignment, in addition to training qualifi ed minister for education, many original contributions to quantum theories. In addition, he signifi cantly ● His colleagues. engineers and creating synergies between culture, sports, science and institutes. technology, Hiroshi Hase, The Xi Jalin Prize for outstanding work in signed the guestbook with the accelerator fi eld was awarded to Derek the director for research Tom Kibble 1932–2016 Lowenstein from Brookhaven National and computing, Eckhard Laboratory in the US, while the Nishikawa Elsen, and the director Tetsuji Prize was awarded to Gwo-Huei for international relations, Tom Kibble, an internationally renowned Tom Kibble, co-inventor of spontaneous Luo at the NSRRC in Taiwan. Sam Posen Charlotte Warakaulle, theoretical physicist whose contributions symmetry-breaking. of Fermilab in the US received the Hogil during a visit that took in the range from the theory of elementary Kim Prize, and the Mark Oliphant Prize was ATLAS visitor centre and the particles to modern early-universe The vindication of spontaneous awarded to Spencer Jake Gessner of SLAC LHC magnet test hall. cosmology, died on 3 June in London, symmetry-breaking presented a for his PhD thesis work on hollow-channel aged 83. much-debated dilemma for the Nobel plasma wakefi eld accelerators. One of Kibble’s most important Committee, notwithstanding Brout’s Sarah Charley The eighth IPAC will take place in Under secretary for pieces of work in this area was his study demise in 2011, because prizes can be Copenhagen, Denmark, on 14–19 May 2017. science and energy of spontaneous symmetry-breaking, awarded to at most three individuals. ● www.ipac16.org. at the US Department whereby vector particles can acquire a London College Imperial Finn-Casey, Mike However, Kibble was also sole author of a of Energy, Franklin mass accompanied by the appearance of 1967 paper that focused on the non-abelian (Lynn) M Orr, pictured a massive scalar boson. This mechanism generalization of the mechanism. When at CMS on 16 June – which was put forward independently in the Standard Model came along shortly with CMS scientist 1964 by Brout and Englert, by Higgs and afterwards, Kibble’s paper was seen to Isobel Ojalvo from by Kibble, Guralnik and Hagen – lies at the explain not only why the W and Z acquire the University of heart of the Standard Model and all modern a mass but, equally crucial, why the photon Wisconsin-Madison. unifi ed theories of fundamental particles. does not. At a celebration of Kibble’s 80th It was fi nally confi rmed in 2012 by the birthday at Imperial College in March 2013, discovery of the Higgs boson at CERN (the Steven Weinberg ended a public lecture by associated massive W and Z vector bosons stating “Tom Kibble showed us why light is having already been discovered at CERN in massless”. Indeed, Higgs said that Kibble IPAC16 was hosted by Pohang Accelerator the early 1980s), winning Higgs and Englert should have shared the prize awarded to ▲ Laboratory in Korea. the 2013 Nobel Prize in Physics. Englert and himself “because of what he 50 51 CERNCOURIER www. V OLUME 5 6 N UMBER 6 J ULY /A UGUST 2 0 1 6 CERN Courier July/August 2016 CERN Courier July/August 2016 Faces & Places Faces & Places wrote in 1967”. Kibble himself maintained Bannerman) and he attended Edinburgh Other awards include the 1984 Rutherford Vesztergombi moved to CERN and joined with classical computing methods, a dignifi ed modesty throughout, in keeping University in the UK from 1951–58. After Medal and Prize, the 1993 Guthrie Medal Pierre Darriulat’s group at the ISR, where and got involved in highly parallel and with the honesty and integrity for which he spending a year at Caltech in the US he and Prize, the 2009 Dirac Medal, the 2010 he started to work on phenomena associated associative computer programming and was justly famous. joined the theoretical physics department Sakurai Prize for Theoretical Physics, with large transverse momentum. From fi eld-programmable gate arrays. He played Spontaneous symmetry-breaking also at Imperial College London, which had Honorary Fellowship of the IOP in 1998 1976 onwards he contributed to the study a pioneering role in the development of predicted the existence of soliton-like recently been founded by Abdus Salam. and the 2012 Einstein Medal. He received a of the quark structure of the proton at the new ideas – among them a proposal to use solutions of the fi eld equations of unifi ed In 1970 Kibble became professor of CBE in 1998 and a knighthood in 2012. SPS experiment NA4 in the group of Carlo the waters of Lake Geneva as a gigantic fi eld theories. In 1976, Kibble realised that theoretical physics at Imperial, and was Kibble was also concerned about the Rubbia, and he later worked on the detailed Hungarian Academy Sciences of detector for a neutrino beam fi red from these structures could condense as the head of the department of physics there nuclear arms race and took leading roles in study of W and Z bosons as a member of the CERN. In Hungary, he was also the fi rst to universe cooled from the hot conditions from 1983–1991.
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