DOCSLIB.ORG

Icecube Brings News from the Deep

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Icecube Brings News from the Deep I NTERNATIONAL J OURNAL OF H IGH -E NERGY P HYSICS CERNCOURIER WELCOME V OLUME 5 3 N UMBER 6 J ULY /A UGUST 2 0 1 3 CERN Courier – digital edition Welcome to the digital edition of the July/August 2013 issue of CERN Courier. This “double issue” provides plenty to read during what is for many people the holiday season. The feature articles illustrate well the breadth of modern IceCube brings particle physics – from the Standard Model, which is still being tested in the analysis of data from Fermilab’s Tevatron, to the tantalizing hints of news from the deep extraterrestrial neutrinos from the IceCube Observatory at the South Pole. A connection of a different kind between space and particle physics emerges in the interview with the astronaut who started his postgraduate life at CERN, while connections between particle physics and everyday life come into focus in the application of particle detectors to the diagnosis of breast cancer. And if this is not enough, take a look at Summer Bookshelf, with its selection of suggestions for more relaxed reading. To sign up to the new issue alert, please visit: http://cerncourier.com/cws/sign-up. To subscribe to the magazine, the e-mail new-issue alert, please visit: http://cerncourier.com/cws/how-to-subscribe. ISOLDE OUTREACH TEVATRON From new magic LHC tourist trail to the rarest of gets off to a LEGACY EDITOR: CHRISTINE SUTTON, CERN elements great start Results continue DIGITAL EDITION CREATED BY JESSE KARJALAINEN/IOP PUBLISHING, UK p6 p43 to excite p17 CERNCOURIER www. V OLUME 5 3 N UMBER 6 J ULY /A UGUST 2 0 1 3 CERN Courier July/August 2013 Contents Covering current developments in high-energy physics and related fi elds worldwide CERN Courier is distributed to member-state governments, institutes and laboratories affi liated with CERN, and to their personnel. It is published monthly, except for January and August. The views expressed are not necessarily those of the CERN CERNCOURIER management. Editor Christine Sutton V OLUME 5 3 N UMBER 6 J ULY /A UGUST 2 0 1 3 News editor Kate Kahle Editorial assistant Laura Hourican CERN, 1211 Geneva 23, Switzerland E-mail [email protected] 5 N EWS Fax +41 (0) 22 785 0247 Web cerncourier.com • IceCube detects ultra-high-energy events and observes oscillations ISOLDE experiments: from a new magic number to Advisory board Luis Álvarez-Gaumé, James Gillies, Horst Wenninger • the rarest element CMS sees fi rst direct evidence for γγ→WW Laboratory correspondents: • Argonne National Laboratory (US) Cosmas Zachos ALICE through a gamma-ray looking glass New precision Brookhaven National Laboratory (US) P Yamin • • Cornell University (US) D G Cassel measurement of the Λb lifetime Council updates European DESY Laboratory (Germany) Till Mundzeck • EMFCSC (Italy) Anna Cavallini Strategy for Particle Physics • EC and CERN support major Enrico Fermi Centre (Italy) Guido Piragino facility in Middle East ILC Technical Design Report is published Fermi National Accelerator Laboratory (US) Katie Yurkewicz • Forschungszentrum Jülich (Germany) Markus Buescher Giant magnet ring makes epic journey DESY inaugurates GSI Darmstadt (Germany) I Peter • • IHEP, Beijing (China) Tongzhou Xu prototype for the Cherenkov Telescope Array IHEP, Serpukhov (Russia) Yu Ryabov INFN (Italy) Romeo Bassoli Jefferson Laboratory (US) Steven Corneliussen 12 S CIENCEWATCH JINR Dubna (Russia) B Starchenko KEK National Laboratory (Japan) Nobukazu Toge Lawrence Berkeley Laboratory (US) Spencer Klein 14 A STROWATCH Los Alamos National Laboratory (US) Rajan Gupta NCSL (US) Ken Kingery Nikhef (Netherlands) Robert Fleischer 15 RCHIVE Novosibirsk Institute (Russia) S Eidelman A Orsay Laboratory (France) Anne-Marie Lutz PSI Laboratory (Switzerland) P-R Kettle Saclay Laboratory (France) Elisabeth Locci F EATURES Science and Technology Facilities Council (UK) Julia Maddock 17 The Tevatron’s data continue to excite SLAC National Accelerator Laboratory (US) Farnaz Khadem TRIUMF Laboratory (Canada) Marcello Pavan Latest results from 10 years of proton–antiproton running. Produced for CERN by IOP Publishing Ltd IOP Publishing Ltd, Temple Circus, Temple Way, 23 ClearPEM clarifi es breast cancer diagnosis Bristol BS1 6HG, UK Tel +44 (0)117 929 7481 A dedicated PET device has its origins in detectors for the LHC. Publisher Susan Curtis Production editor Jesse Karjalainen, Lisa Gibson 26 The case for a circular e+e– Higgs factory Technical illustrator Alison Tovey Group advertising manager Chris Thomas Options for a Higgs factory include a bigger version of LEP. Advertisement production Katie Graham Marketing & Circulation Angela Gage 28 From CERN to space – and back Head of B2B & Marketing Jo Allen Art director Andrew Giaquinto A CERN fellow who became an astronaut talks about his life. Advertising Tel +44 (0)117 930 1026 (for UK/Europe display advertising) 30 The return of quarkonia or +44 (0)117 930 1164 (for recruitment advertising); E-mail: [email protected]; fax +44 (0)117 930 1178 LHC results cast light on heavy quark–antiquark bound states. General distribution Courrier Adressage, CERN, 1211 Geneva 23, Switzerland E-mail: [email protected] 32 Beauty in Bologna In certain countries, to request copies or to make address changes, contact: China Keqing Ma, Library, Institute of High Energy Physics, The latest news from the Beauty 2013 international conference. PO Box 918, Beijing 100049, People’s Republic of China E-mail: [email protected] Germany Veronika Werschner, DESY, Notkestr. 85, 22607 Hamburg, Germany 35 Neutrino telescopes point towards exotic physics E-mail: [email protected] Report from a workshop in Marseilles. Italy Loredana Rum or Anna Pennacchietti, INFN, Casella Postale 56, 00044 Frascati, Rome, Italy E-mail: [email protected] 38 F ACES &P LACES UK Mark Wells, Science and Technology Facilities Council, Polaris House, North Star Avenue, Swindon, Wiltshire SN2 1SZ E-mail: [email protected] US/Canada Published by Cern Courier, 6N246 Willow Drive, 49 R ECRUITMENT St Charles, IL 60175, US. Periodical postage paid in St Charles, IL, US Fax 630 377 1569. E-mail: [email protected] POSTMASTER: send address changes to: Creative Mailing Services, PO Box 1147, 52 B OOKSHELF St Charles, IL 60174, US Published by European Organization for Nuclear Research, CERN, 1211 Geneva 23, Switzerland Tel +41 (0) 22 767 61 11. Telefax +41 (0) 22 767 65 55 Printed by Warners (Midlands) plc, Bourne, Lincolnshire, UK A digital optical module descends down a hole deep in the ice during © 2013 CERN ISSN 0304-288X On the cover : the installation of the IceCube Neutrino Observatory at the South Pole. IceCube has recently detected neutrinos with record-breaking energies around 1 PeV and observed neutrino oscillations (p5). It also has the potential to seach for exotic physics (p35). (Image credit: NSF/B Gudbjartsson.) 3 Untitled-1 1 27/06/2013 14:36 CERNCOURIER www. V OLUME 5 3 N UMBER 6 J ULY /A UGUST 2 0 1 3 CERN Courier July/August 2013 Contents Covering current developments in high-energy physics and related fi elds worldwide CERN Courier is distributed to member-state governments, institutes and laboratories affi liated with CERN, and to their personnel. It is published monthly, except for January and August. The views expressed are not necessarily those of the CERN CERNCOURIER management. Editor Christine Sutton V OLUME 5 3 N UMBER 6 J ULY /A UGUST 2 0 1 3 News editor Kate Kahle Editorial assistant Laura Hourican CERN, 1211 Geneva 23, Switzerland E-mail [email protected] 5 N EWS Fax +41 (0) 22 785 0247 Web cerncourier.com • IceCube detects ultra-high-energy events and observes oscillations ISOLDE experiments: from a new magic number to Advisory board Luis Álvarez-Gaumé, James Gillies, Horst Wenninger • the rarest element CMS sees fi rst direct evidence for γγ→WW Laboratory correspondents: • Argonne National Laboratory (US) Cosmas Zachos ALICE through a gamma-ray looking glass New precision Brookhaven National Laboratory (US) P Yamin • • Cornell University (US) D G Cassel measurement of the Λb lifetime Council updates European DESY Laboratory (Germany) Till Mundzeck • EMFCSC (Italy) Anna Cavallini Strategy for Particle Physics • EC and CERN support major Enrico Fermi Centre (Italy) Guido Piragino facility in Middle East ILC Technical Design Report is published Fermi National Accelerator Laboratory (US) Katie Yurkewicz • Forschungszentrum Jülich (Germany) Markus Buescher Giant magnet ring makes epic journey DESY inaugurates GSI Darmstadt (Germany) I Peter • • IHEP, Beijing (China) Tongzhou Xu prototype for the Cherenkov Telescope Array IHEP, Serpukhov (Russia) Yu Ryabov INFN (Italy) Romeo Bassoli Jefferson Laboratory (US) Steven Corneliussen 12 S CIENCEWATCH JINR Dubna (Russia) B Starchenko KEK National Laboratory (Japan) Nobukazu Toge Lawrence Berkeley Laboratory (US) Spencer Klein 14 A STROWATCH Los Alamos National Laboratory (US) Rajan Gupta NCSL (US) Ken Kingery Nikhef (Netherlands) Robert Fleischer 15 RCHIVE Novosibirsk Institute (Russia) S Eidelman A Orsay Laboratory (France) Anne-Marie Lutz PSI Laboratory (Switzerland) P-R Kettle Saclay Laboratory (France) Elisabeth Locci F EATURES Science and Technology Facilities Council (UK) Julia Maddock 17 The Tevatron’s data continue to excite SLAC National Accelerator Laboratory (US) Farnaz Khadem TRIUMF Laboratory (Canada) Marcello Pavan Latest results from 10 years of proton–antiproton running. Produced for CERN by IOP Publishing Ltd IOP Publishing Ltd, Temple Circus, Temple Way, 23 ClearPEM clarifi es breast cancer diagnosis Bristol BS1 6HG, UK Tel +44 (0)117 929 7481 A dedicated PET device has its origins in detectors for the LHC. Publisher Susan Curtis Production editor Jesse Karjalainen, Lisa Gibson 26 The case for a circular e+e– Higgs factory Technical illustrator Alison Tovey Group advertising manager Chris Thomas Options for a Higgs factory include a bigger version of LEP. Advertisement production Katie Graham Marketing & Circulation Angela Gage 28 From CERN to space – and back Head of B2B & Marketing Jo Allen Art director Andrew Giaquinto A CERN fellow who became an astronaut talks about his life.
Load more

Recommended publications
  • Jul/Aug 2013
    I NTERNATIONAL J OURNAL OF H IGH -E NERGY P HYSICS CERNCOURIER WELCOME V OLUME 5 3 N UMBER 6 J ULY /A UGUST 2 0 1 3 CERN Courier – digital edition Welcome to the digital edition of the July/August 2013 issue of CERN Courier. This “double issue” provides plenty to read during what is for many people the holiday season. The feature articles illustrate well the breadth of modern IceCube brings particle physics – from the Standard Model, which is still being tested in the analysis of data from Fermilab’s Tevatron, to the tantalizing hints of news from the deep extraterrestrial neutrinos from the IceCube Observatory at the South Pole. A connection of a different kind between space and particle physics emerges in the interview with the astronaut who started his postgraduate life at CERN, while connections between particle physics and everyday life come into focus in the application of particle detectors to the diagnosis of breast cancer. And if this is not enough, take a look at Summer Bookshelf, with its selection of suggestions for more relaxed reading. To sign up to the new issue alert, please visit: http://cerncourier.com/cws/sign-up. To subscribe to the magazine, the e-mail new-issue alert, please visit: http://cerncourier.com/cws/how-to-subscribe. ISOLDE OUTREACH TEVATRON From new magic LHC tourist trail to the rarest of gets off to a LEGACY EDITOR: CHRISTINE SUTTON, CERN elements great start Results continue DIGITAL EDITION CREATED BY JESSE KARJALAINEN/IOP PUBLISHING, UK p6 p43 to excite p17 CERNCOURIER www.
    [Show full text]
  • Die Entdeckung Des Higgs-Teilchens Am CERN
    Die Entdeckung des Higgs-Teilchens am CERN Prof. Karl Jakobs Physikalisches Institut Universität Freiburg From the editorial: “The top Breakthrough of the Year – the discovery of the Higgs boson – was an unusually easy choice, representing both a triumph of the human intellect and the culmination of decades of work by many thousands of physicists and engineers.” Nobel-Preis für Physik 2013: François Englert und Peter Higgs “ … for the theoretical discovery of a mechanism that contributes to our understanding of the origin of mass of sub-atomic particles, and which recently was confirmed through the discovery of the predicted fundamental particle, by the ATLAS and CMS experiments at CERN’s Large Hadron Collider.” EPS Prize 2013: The 2013 High Energy and Particle Physics Prize, for an outstanding contribution to High Energy Physics, is awarded to the ATLAS and CMS collaborations, “for the discovery of a Higgs boson, as predicted by the Brout-Englert-Higgs mechanism”, and to Michel Della Negra, Peter Jenni, and Tejinder Virdee, “for their pioneering and outstanding leadership rôles in the making of the ATLAS and CMS experiments”. Physik-Journal Februar 2015: “.. Obwohl in diesen großen Kollaborationen eine große Zahl von Forschern mitarbeitet, ist es möglich, einzelne Forscherpersönlichkeiten herauszuheben, deren Ideen und Arbeit für den Erfolg des Experiments von besonderer Bedeutung waren. Zu diesen gehört neben den Sprechern der Experimente Karl Jakobs.” The Standard Model of Particle Physics γ mW ≈ 80.4 GeV mZ ≈ 91.2 GeV (i) Matter particles: quarks and leptons (spin ½, fermions) (ii) Four fundamental forces: described by quantum field theories (except gravitation) à massless spin-1 gauge bosons (iii) The Higgs field à scalar field, spin-0 Higgs boson The Brout-Englert-Higgs Mechanism F.
    [Show full text]
  • 2014André Lagarrigue Prize
    2014 André Lagarrigue Prize The international jury1 of the André Lagarrigue prize, meeting under the chairmanship of Jacques Martino, director of IN2P3, has awarded the 2014 prize to Michel Della Negra, physicist emeritus of the CERN Physics Department, presently CMS emeritus at Imperial College, London. The award, established in 2005 under the aegis of the French Physical Society, pays tribute to Professor André Lagarrigue, director of the Laboratory of Linear Accelerator (LAL, Orsay) from 1969 to 1975, who had a major role in the discovery of neutral weak interactions with the Gargamelle bubble chamber at CERN, thus establishing the validity of the electroweak theory. The award, co-funded by the CEA, CERN, Ecole Polytechnique, IN2P3-CNRS, LAL and Université Paris-Sud, is awarded every two years. Born leader, with deep understanding of physics, in direct André Lagarrigue’s lineage, Michel Della Negra has shown outstanding qualities as a builder of experimental devices of great complexity. He is one of the major players in two fundamental discoveries: the W and Z bosons, carriers of the weak interaction with the UA1 SppS, and the Higgs boson with CMS at the LHC. Born in 1942, a graduate of the Ecole Polytechnique, Paris, he begins his career at the Laboratory of Nuclear Physics of the College de France. He defends his thesis in 1967 on the study of proton-antiproton annihilations at rest, using bubble chamber photographs. He is recruited by the CNRS in 1968. During a postdoctoral stay at SLAC (1970-1972), he joins the first deep inelastic scattering experiment using a 17 GeV muon beam interacting on the protons of a rapid cycling bubble chamber, and he is given the responsibility of the muon system.
    [Show full text]
  • 30 Years of Hadron Colliders
    30 Years of Hadron Colliders M. Della Negra/CERN Islamabad, 16 December 2004 Hadron & Electron Colliders 4 10 Accelerators LHC electron 3 10 hadron Higgs boson Tevatron SppS LEPII t quark 2 10 SLC TRISTAN W, Z bosons PEP CESR 1 10 ISR SPEAR b quark c quark 0 10 Prin-Stan Constituent CM Energy (GeV) Parton-parton C.M. Energy (GeV) C.M. Parton-parton s quark -1 10 1960 1970 1980 1990 2000 2010 StartingStarting Year Year Michel Della Negra/Islamabad 16 December 2004 2 Intersecting Storage Rings, ISR First hadron collider (p-p) (approved by CERN Council Dec 1965) CCRS 1976 First collisions in Jan 1971 √s = 23, 30, 44, 53, 62 GeV L~ 1031cm-2s-1 Most experiments: Inclusive spectra in small solid angle spectrometers looking at forward angles. Three Collaborations looked at large angle: BS, SS, CCR (1973) Excess at large pT Parton-parton collisions? Michel Della Negra/Islamabad 16 December 2004 3 -8 ISR: the pT puzzle (1) Expectations from the parton model: From dimension arguments the parton-parton scattering cross- CCRS 1976 section should behave as dσ = f (tˆ / sˆ )sˆ −2 dtˆ Then the inclusive cross- section should behave as -4 pT at fixed xT: d 3σ 1 E 3 = 4 f (xT ,cosθ) dp pT 2 p with x = T T s d 3σ 1 -8 E 3 ≈ A 8 exp(−26xT ) But CCRS data scale as pT dp pT Michel Della Negra/Islamabad 16 December 2004 4 -8 ISR: the pT puzzle (2) -8 Force pT ? meson+quark→ meson+quark (CIM) or adhoc “black box” cross section (FF1) dσ 1 1 ∝ → dtˆ sˆ 2 sˆ 4 Or improve parton model : CCHK 1977 keep natural dimensional scaling for pointlike constituents.
    [Show full text]
  • Data-Driven Estimation of Z Background Contributions to The
    IEKP-KA/2011-21 Data-driven Estimation of Z0 Background Contributions to the + Higgs Search in the H τ τ − ! Channel with the CMS Experiment at the LHC Armin Burgmeier Diploma Thesis at the Physics Department of the Karlsruhe Institute of Technology Referent: Prof. Dr. G. Quast Institut für Experimentelle Kernphysik Korreferent: Prof. Dr. W. de Boer Institut für Experimentelle Kernphysik August 1, 2011 Deutsche Zusammenfassung Schon seit jeher erforschen Menschen systematisch ihre Umgebung und versuchen sie zu ihrem Vorteil zu verändern. Diese Anstrengungen haben den heutigen Wohlstand erst ermöglicht. Dennoch ist die gezielte Forschung heute intensiver denn je - ein Zeichen dafür dass noch längst nicht alles verstanden ist was es zu verstehen gibt und dass eine Entdeckung oftmals viele neue Fragen aufwirft. In der Grundlagenforschung wird die Erweiterung des Wissens der Menschheit an- gestrebt ohne gezielt Anwendungsfälle im Hinterkopf zu haben. Oft haben sich solche Entdeckungen später jedoch als äußerst nützlich erwiesen, darunter beispielsweise die Supraleitung. Die technischen Herausforderungen sind heutzutage so groß, dass alleine um die Experimente zu errichten neue Konzepte und Technologien entwickelt werden müssen. Das prominenteste Beispiel hierzu ist wohl das World Wide Web, das 1989 am Forschungszentrum CERN entwickelt wurde um Forschungsergebnisse innerhalb immer größer werdenden Teams austauschen zu können. Im Bereich der Elementarteilchenphysik, in den diese Arbeit einzuordnen ist, führten Messungen an Teilchenbeschleunigern und kosmischer Strahlung zur Entwicklung des Standardmodells der Teilchenphysik. Das Standardmodell beschreibt die kleinsten bisher bekannten Bauteile der Materie, genannt Teilchen, und mit Ausnahme der Gravitation auch deren Wechselwirkungen. Es erlaubt Rückschlüsse auf die Entwicklung des frühen Universums zu ziehen als auch Vorhersagen für zukünftige Experimente zu treffen.
    [Show full text]
  • Julius–Maximilians–Universität Würzburg
    Julius–Maximilians–Universitat¨ Wurzburg¨ Institut f¨ur Theoretische Physik und Astronomie Theoretische Physik II A Supersymmetric Higgsless Model Of Electroweak Symmetry Breaking Diploma thesis by Karoline K¨opp Supervised by Prof. Dr. Thorsten Ohl 31. 03. 2009 Zusammenfassung Die vorliegende Diplomarbeit besch¨aftigt sich mit einem supersymmetrischen higgslosen Model mit einer gekrummten¨ Extradimension. In Modellen mit kompakten zus¨atzlichen r¨aumlichen Di- mensionen kann die elektroschwache Eichsymmetrie ohne ein Higgs-Feld, wie es vom Standard- modell der Elementarteilchenphysik vorhergesagt wird, durch Randbedingungen gebrochen wer- den. Die Erforschung dieser Modellen stellt daher einen alternativen Zugang zum Verst¨andnis der elektroschwachen Symmetriebrechung dar, deren zugrundeliegender Mechanismus bisher experimentell noch nicht bestimmt werden konnte. Modelle mit einem exponentiell gekrummten¨ Randall-Sundrum Raumzeithintergrund, haben sich in den vergangenen Jahren als besonders vielversprechend erwiesen. In einer Erweiterung [1] des ursprunglichen¨ Modells [2] werden gekrummte¨ Extradimensionen mit Supersymmetrie (SUSY) verbunden. Der Schwerpunkt dieser Arbeit liegt auf der Untersuchung einer neuen und vergleichsweise sanften Art der SUSY-Brechung auf einer getrennten infraroten Brane“ in der ” neuen Dimension. Die Arbeit ist wie folgt aufgebaut: Zun¨achst werden in Kapitel eins und zwei die notwendigen Grundlagen zu Extradimensionen und Supersymmetrie besprochen, um das Modell im dritten Kapitel einfuhren¨ zu k¨onnen. Der Aufbau des Modells auf zwei back-to-back“ Intervallen und ” das resultierende Massenspektrum bilden den Ausgangspunkt fur¨ alle weiteren Untersuchungen. Die konkrete Wahl der Randbedingungen und Modellparameter wird in den anschliessenden Kapiteln vier und funf¨ fur¨ den Eich- und den Materiesektor getrennt diskutiert und konkret begrundet.¨ Wir untersuchen die Kaluza-Klein Wellenfunktionen und geben N¨aherungsl¨osungen fur¨ die leichtesten Moden des Spektrums an.
    [Show full text]
  • The High Energy and Particle Physics Prize 2013 ATLAS Collaboration
    The High Energy and Particle Physics Prize 2013 ATLAS collaboration (CERN, CH) CMS collaboration (CERN, CH) For the discovery of a Higgs boson as predicted by the Brout-Englert-Higgs mechanism Michel Della Negra (CERN, now at Imperial College London, UK) Peter Jenni (CERN, now at Freiburg University, DE) Tejinder Virdee (Imperial College London, UK) For their pioneering and outstanding leadership rôles in the making of the ATLAS and CMS experiments. In July 2012, the ATLAS and CMS collaborations announced the discovery of a new heavy particle at a mass around 125 GeV. Its properties were strikingly similar to those of a Higgs boson, a long-sought particle expected from the mechanism for electroweak symmetry breaking that was introduced almost 50 years ago by Robert Brout, François Englert and Peter Higgs. Experimental confirmation of the Higgs boson presented monumental challenges because of its relatively large mass and small production rates in cleanly detectable modes. The observation has required the creation of experiments of unprecedented capability and complexity, designed to discern the signatures that correspond to the Higgs boson. Their creation has required the use, and in many cases the development, of cutting-edge technologies. In addition, the gigantesque structures were supplemented with appropriate software and computing systems that enabled the analysis of the vast amounts of data that had to be collected. This work has required the collective efforts of over three thousand physicists and engineers from each experiment. These teams collected the data and analyzed it to establish that a Higgs boson, very much like the one in the Standard Model, exists.
    [Show full text]
  • Faces & Places
    CERN Courier December 2016 Faces & Places Mineral Insulated Cable We were among the fi rst pioneering companies to manufacture MI cable for improved performance and reliability. Standard insulation materials include MgO, Al2O3, and SiO2 with A WARDS high purity for applications such as nuclear and elevated temperature as standard. Cables are manufactured to all International Standards such as IEC, ATSM, JIS and BS. APS announces 2017 prize recipients • Flexible - bend radius of 6 x outer diameter. • Pressure tight vacuum seal. • Operating temperature of -269℃ to 1,260℃. • Welded and hermetically sealed connections. • Sheath diameter from 0.08mm to 26mm. • Capable of operating in the following atmospheres - oxidising, reducing, neutral and vacuum. • RF Coaxial, Triaxal cables, Multiconductor Transmission Top: Michel Della Negra, Peter Jenni and Tejinder Virdee (Panofsky Prize); James cables for power, control and instrumentation. Bjorken, Sekazi Mtingwa and Anton Piwinski (Wilson Prize). Bottom: Sally Dawson, Howard Haber, John Gunion and Gordon Kane (J J Sakurai Prize). The American Physical Society (APS) has instrumental contributions to the theory of problems in nuclear-structure physics, awarded its prizes for 2017, several of which the properties, reactions and signatures of cold-atom physics, and dense-matter Temperature is our business Cables | Temp Measurement | Electric Heaters are devoted to the fi elds of high-energy and the Higgs boson. theory of relevance to neutron stars”. The nuclear physics. The W K H Panofsky Prize Recognising
    [Show full text]
  • Arxiv:2009.11310V2 [Hep-Ph] 30 Nov 2020 Contents
    Prepared for submission to JHEP IPPP/20/42 ZU-TH 17/20 CERN-TH-2020-160 Scale and isolation sensitivity of diphoton distributions at the LHC Thomas Gehrmann,a Nigel Glover,b Alexander Huss,b,c James Whiteheadb aPhysik-Institut, Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland bInstitute for Particle Physics Phenomenology, Durham University, Durham, DH1 3LE, UK cTheoretical Physics Department, CERN, 1211 Geneva 23, Switzerland E-mail: [email protected], [email protected], [email protected], [email protected] Abstract: Precision measurements of diphoton distributions at the LHC display some tension with theory predictions, obtained at next-to-next-to-leading order (NNLO) in QCD. We revisit the theoretical uncertainties arising from the approximation of the experimental photon isolation by smooth-cone isolation, and from the choice of functional form for the renormalisation and factorisation scales. We find that the resulting variations are substantial overall, and enhanced in certain regions. We discuss the infrared sensitivity at the cone boundaries in cone-based isolation in related distributions. Finally, we compare predictions made with alternative choices of dynamical scale and isolation prescriptions to experimental data from ATLAS at 8 TeV, observing improved agreement. This contrasts with previous results, highlighting that scale choice and isolation prescription are potential sources of theoretical uncertainty that were previously underestimated. Keywords: QCD, Photon production,
    [Show full text]
  • Conference Time in Stockholm
    CERN Courier October 2013 EPS-HEP 2013 Verify and optimize your designs with COMSOL Multiphysics.® Conference time in RF COUPLER: This model computes the transmission probability through an RF coupler using both the angular coefficient method Stockholm available in the Free Molecular Flow interface and a Monte Carlo method using the Mathematical Particle Tracing interface. Multiphysics tools let you build simulations that accurately replicate the important characteristics of your designs. The key is the ability to include all physical effects that exist in the real world. To learn more about COMSOL Multiphysics, visit www.comsol.com/introvideo © Copyright 2013 COMSOL The Higgs boson, dark matter and rare The city of Stockholm provided a beautiful setting for the 2013 edition of EPS-HEP, one of the major international summer processes were among the highlights of the conferences in particle physics. (Image credit: Marina 2013 International Europhysics Conference on Lukashova/Dreamstime.com.) 0.5% precision – better than for any quark – and several tests by thermodynamicscompetent High-Energy Physics. P www.reuter-technologie.de ATLAS and CMS show that its spin-parity, J , is compatible with the 0+ expected for a Standard Model Higgs boson. These results exclude other models to greater than 95% confi dence level (CL), while a new When the Swedish warship Vasa capsized in Stockholm harbour result from DØ rejects a graviton-like 2+ at >99.2% CL. Your Expert for Vacuum Brazing and UHV Systems on her maiden voyage in 1628, many hearts must have also sunk The new boson’s couplings provide a crucial test of whether it is metaphorically, as they did at CERN in September 2008 when the the particle responsible for electroweak-symmetry breaking in the UHV compatible joining of LHC’s start-up came to an abrupt end.
    [Show full text]
  • LHC Physics April 20-24, 2009
    i i “”LHC-IPM09-18 Aug 2010”” — 2010/8/30 — 13:06 — page I — #1 i i SCHOOL OF PARTICLES AND ACCELERATORS INSTITUTE FOR RESEARCH IN FUNDAMENTAL SCIENCES (IPM) First IPM meeting on LHC Physics April 20-24, 2009 Edited by A. Moshaii Tarbiat Modares University and Institute for Research in Fundamental Sciences (IPM) S. Paktinat Mehdiabadi Institute for Research in Fundamental Sciences (IPM) A. Khorramian Semnan University and Institute for Research in Fundamental Sciences (IPM) i i i i i i “”LHC-IPM09-18 Aug 2010”” — 2010/8/30 — 13:06 — page II — #2 i i i i i i i i “”LHC-IPM09-18 Aug 2010”” — 2010/8/30 — 13:06 — page II — #2 i i i i i i i i “”LHC-IPM09-18 Aug 2010”” — 2010/8/30 — 13:06 — page V — #5 i i First IPM meeting on LHC Physics, April 20-24, 2009 was organized by School of Particles and Accelerators, Institute for Research in Fundamental Sciences (IPM) and sponsored by Main Sponser: IPM Other Sponsers: CERN(CMS) Center of Excellence in Physics (CEP), Physics Department, Sharif University of Technology International Advisory Board F. Ardalan (Sharif University of Technology and IPM) M. Baarmand (Florida Institute of Technology) D. Denegri (Saclay, CERN) J. Ellis (CERN) L. Pape (ETH Zurich, CERN) M. Spiropulu (CERN) T. Virdee (Imperial College, CERN) Organizing Committee H. Arfaei (Sharif University of Technology and IPM) A. Khorramian (Semnan University and IPM) M. Mohammadi Najafabadi (IPM) A. Moshaii (Tarbiat Modares University and IPM) S. Paktinat Mehdiabadi (IPM) S. Rouhani (Sharif University of Technology and IPM) i i i i i i “”LHC-IPM09-18 Aug 2010”” — 2010/8/30 — 13:06 — page IV — #4 i i i i i i i i “”LHC-IPM09-18 Aug 2010”” — 2010/8/30 — 13:06 — page VII — #7 i i Contents Preface ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: XI 1 Top quark mass measurement from highly boosted jets at LHC I.
    [Show full text]
  • High-Precision $\Alpha S $ Measurements from LHC to FCC-Ee
    CERN-PH-TH-2015-299, CoEPP-MN-15-13 High-precision αs measurements from LHC to FCC-ee Workshop Proceedings, CERN, Geneva, 12{13 October 2015 Editors David d'Enterria (CERN), Peter Z. Skands (Monash) Authors S. Alekhin (U. Hamburg), A. Banfi (U. Sussex), S. Bethke (MPI, M¨unchen), J. Bl¨umlein(DESY), K.G. Chetyrkin (KIT, Karlsruhe), D. d'Enterria (CERN), G. Dissertori (ETH Zurich), X. Garcia i Tormo (Bern), A. H. Hoang (U. Wien), M. Klasen (U. M¨unster), T. Klijnsma (ETH Zurich), S. Kluth (T.U. M¨unchen), J.-L. Kneur (U. Montpellier 2), B.A. Kniehl (U. Hamburg), D. W. Kolodrubetz (MIT), J. K¨uhn(KIT, Karlsruhe), P. Mackenzie (Fermilab), B. Malaescu (LPNHE, Paris), V. Mateu (U. Wien/U. A. Madrid), L. Mihaila (KIT, Karlsruhe), S. Moch (U. Hamburg), K. M¨onig(DESY), R. P´erez-Ramos(Paris), A. Pich (U. Val`encia),J. Pires (U. Milano/MPP Munich), K. Rabbertz (KIT, Karlsruhe), G. P. Salam (CERN), F. Sannino (CP3-Origins, Odense), J. Soto i Riera (U. Barcelona), M. Srebre (U. Ljubljana), I. W. Stewart (MIT) Abstract This document provides a writeup of all contributions to the workshop on \High precision measurements of αs: From LHC to FCC-ee" held at CERN, Oct. 12{13, 2015. The workshop explored in depth the latest developments on the determination of the QCD coupling αs from 15 methods where high precision measurements are (or will be) available. Those include low-energy observables: (i) lattice QCD, (ii) pion decay factor, (iii) quarkonia and (iv) τ decays, (v) soft parton-to-hadron fragmentation functions; as well as high-energy observables: (vi) global fits of parton distribution functions, (vii) hard parton-to-hadron fragmentation functions, (viii) jets in e±p DIS and γ-p photoproduction, (ix) photon structure function in γ-γ, (x) event shapes + and (xi) jet cross sections in e e− collisions, (xii) W boson and (xiii) Z boson decays, and (xiv) jets and (xv) top-quark cross sections in proton-(anti)proton collisions.
    [Show full text]