Measurement of the atmospheric muon spectrum from 20 to 3000 GeV
P. AchardUniversity of Geneva, Geneva, SwitzerlandО. АдрианиUniversity of Florence, Florence, ItalyM. Aguilar-BenitezCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, E-28040 Madrid, SpainM. van den AkkerRadboud University Nijmegen, Nijmegen, The NetherlandsJ. Alcaraz MaestreCentro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, E-28040 Madrid, SpainG. AlemanniUniversity of Lausanne, Lausanne, SwitzerlandJ. AllabyEuropean Organization for Nuclear Research, Geneva, SwitzerlandA. AloisioUniversity of Naples Federico II, Naples, ItalyM. G. AlviggiUniversity of Naples Federico II, Naples, ItalyH. AnderhubETH Zurich, Zurich, SwitzerlandVladimir AndreevNuclear Physics Institute, St. Petersburg, RussiaF. AnselmoUniversity of Bologna, Bologna, ItalyA. ArefievInstitute of Theoretical and Experimental Physics, ITEP, Moscow, RussiaT. AzemoonUniversity of Michigan–Ann Arbor, Ann Arbor, United StatesT. AzizTata Institute of Fundamental Research, Mumbai, IndiaP. BagnaiaSapienza University of Rome, Rome, ItalyA. BajoINFN Sezione di Perugia and Università Degli Studi di Perugia, I-06100 Perugia, ItalyG. BaksayFlorida Institute of Technology, Melbourne, United StatesL. BaksayFlorida Institute of Technology, Melbourne, United StatesJ. BährS.V. BaldewUniversity of Amsterdam, Amsterdam, NetherlandsSw. BanerjeeLaboratoire d'Annecy-le-Vieux de Physique des Particules, LAPP, IN2P3-CNRS, BP 110, F-74941 Annecy-le-Vieux cedex, FranceA. BarczykETH Zurich, Zurich, SwitzerlandR. BarillèreRWTH Aachen University, Aachen, GermanyP. BartaliniUniversity of Lausanne, Lausanne, SwitzerlandM. BasileUniversity of Bologna, Bologna, ItalyN. BatalovaPurdue University West Lafayette, West Lafayette, United StatesR. BattistonUniversity of Perugia, Perugia, ItalyA. BayUniversity of Lausanne, Lausanne, SwitzerlandF. BecattiniUniversity of Florence, Florence, ItalyU. BeckerMassachusetts Institute of Technology, Cambridge, United StatesF. BehnerETH Zurich, Zurich, SwitzerlandL. BellucciUniversity of Florence, Florence, ItalyR. BerbecoUniversity of Michigan–Ann Arbor, Ann Arbor, United StatesJ. BerdugoP. BergesMassachusetts Institute of Technology, Cambridge, United StatesB. BertucciUniversity of Perugia, Perugia, ItalyB.L. BetevETH Zurich, Zurich, SwitzerlandM. BiasiniUniversity of Perugia, Perugia, ItalyM. BigliettiUniversity of Naples Federico II, Naples, ItalyA. BilandETH Zurich, Zurich, SwitzerlandJ.J. BlaisingLaboratoire d'Annecy-le-Vieux de Physique des Particules, LAPP, IN2P3-CNRS, BP 110, F-74941 Annecy-le-Vieux cedex, FranceS.C. BlythCarnegie Mellon University, Pittsburgh, United StatesG. J. BobbinkUniversity of Amsterdam, Amsterdam, NetherlandsA. BöhmRWTH Aachen University, Aachen, GermanyL. BoldizsárHungarian Academy of Sciences, Budapest, HungaryB. BorgiaSapienza University of Rome, Rome, ItalyS. BottaiUniversity of Florence, Florence, ItalyD. BourilkovETH Zurich, Zurich, SwitzerlandM. BourquinUniversity of Geneva, Geneva, SwitzerlandS. BracciniUniversity of Geneva, Geneva, SwitzerlandJ.G. BransonUniversity of California, San Diego, San Diego, United StatesF. BrochuInstitute of Theoretical and Experimental Physics, ITEP, Moscow, RussiaJ.D. BurgerMassachusetts Institute of Technology, Cambridge, United StatesW.J. BurgerUniversity of Perugia, Perugia, ItalyX.D. CaiMassachusetts Institute of Technology, Cambridge, United StatesM. CapellMassachusetts Institute of Technology, Cambridge, United StatesG. Cara RomeoUniversity of Bologna, Bologna, ItalyG. CarlinoUniversity of Naples Federico II, Naples, ItalyA.M. CartacciUniversity of Florence, Florence, ItalyJ. CasausF. CavallariSapienza University of Rome, Rome, ItalyN. CavalloUniversity of Basilicata, Potenza, ItalyC. CecchiUniversity of Perugia, Perugia, ItalyM. CerradaUniversity of Michigan, Ann Arbor, MI 48109, USAM. ChamizoUniversity of Geneva, Geneva, SwitzerlandT. ChiarusiUniversity of Florence, Florence, ItalyY. H. ChangNational Central University, Taoyuan City, TaiwanM. ChemarinUniversité Claude Bernard Lyon 1, Villeurbanne, FranceA. ChenNational Central University, Taoyuan City, TaiwanG. ChenFlorida Institute of Technology, Melbourne, FL 32901, USAG.M. ChenH.F. ChenUniversity of Science and Technology of China, Hefei, ChinaH.S. ChenUniversity of Science and Technology of China, Hefei, ChinaG. ChiefariUniversity of Naples Federico II, Naples, ItalyL. CifarelliFlorida Institute of Technology, Melbourne, FL 32901, USAF. CindoloUniversity of Bologna, Bologna, ItalyI. ClareMassachusetts Institute of Technology, Cambridge, United StatesR. ClareUniversity of California, Riverside, Riverside, United StatesG. CoignetFlorida Institute of Technology, Melbourne, FL 32901, USAN. ColinoINFN Sezione di Roma and University of Rome, "La Sapienza", I-00185 Rome, ItalyS. CostantiniSapienza University of Rome, Rome, ItalyB. De La CruzS. CucciarelliUniversity of Perugia, Perugia, ItalyJ.A. van DalenRadboud University Nijmegen, Nijmegen, The NetherlandsR. de AsmundisUniversity of Naples Federico II, Naples, ItalyP. DéglonUniversity of Geneva, Geneva, SwitzerlandJ. DebreczeniHungarian Academy of Sciences, Budapest, HungaryA. DegréK. DehmeltFlorida Institute of Technology, Melbourne, United StatesK. DeitersFlorida Institute of Technology, Melbourne, FL 32901, USAD. della VolpeUniversity of Naples Federico II, Naples, ItalyE. DelmeireUniversity of Geneva, Geneva, SwitzerlandP. DenesPrinceton University, Princeton, United StatesF. DeNotaristefaniSapienza University of Rome, Rome, ItalyA. De SalvoETH Zurich, Zurich, SwitzerlandM. DiemozSapienza University of Rome, Rome, ItalyM. DierckxsensUniversity of Amsterdam, Amsterdam, NetherlandsL. K. Ding
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Аннотация
Abstract The absolute muon flux between 20 and 3000 GeV is measured with the L3 magnetic muon spectrometer for zenith angles ranging from 0? to 58?. Due to the large exposure of about 150 m2 sr d, and the excellent momentum resolution of the L3 muon chambers, a precision of 2.3% at 150 GeV in the vertical direction is achieved. The ratio of positive to negative muons is studied between 20 and 500 GeV, and the average vertical muon charge ratio is found to be 1.285 ± 0.003(stat.)± 0.019(syst.). ? 2004 Elsevier B.V. All rights reserved.
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