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首页> 外文期刊>Physical review letters >Discovery of tau Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment
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Discovery of tau Neutrino Appearance in the CNGS Neutrino Beam with the OPERA Experiment

机译：通过OPERA实验发现CNGS中微子束中tau中微子的出现

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摘要

The OPERA experiment was designed to search for nu(mu) -> nu(tau) oscillations in appearance mode, i.e., by detecting the tau leptons produced in charged current nu(tau) interactions. The experiment took data from 2008 to 2012 in the CERN Neutrinos to Gran Sasso beam. The observation of the nu(mu) -> nu(tau) appearance, achieved with four candidate events in a subsample of the data, was previously reported. In this Letter, a fifth nu(tau) candidate event, found in an enlarged data sample, is described. Together with a further reduction of the expected background, the candidate events detected so far allow us to assess the discovery of nu(mu) -> nu(tau) oscillations in appearance mode with a significance larger than 5 sigma.
机译：OPERA实验被设计为在出现模式下搜索nu（mu）-> nu（tau）振荡，即通过检测在充电电流nu（tau）相互作用中产生的tau轻子。该实验从CERN中微子到Gran Sasso波束获取了2008年至2012年的数据。先前已经报道了在数据的子样本中用四个候选事件实现的对nu（mu）-> nu（tau）外观的观察。在这封信中，描述了在扩大的数据样本中发现的第五个nu（tau）候选事件。加上预期背景的进一步降低，到目前为止检测到的候选事件使我们能够评估在出现模式下nu（μ）-> nu（tau）振荡的发现，其显着性大于5 sigma。

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  • 来源
    《Physical review letters》 |2015年第12期|121802.1-121802.7|共7页
  • 作者

    Agafonova N.; Aleksandrov A.; Anokhina A.; Aoki S.; Ariga A.; Bender D.; Bertolin A.; Bodnarchuk I.; Ariga T.; Brugnera R.; Buonaura A.; Chernyavsky M.; De Lellis G.; Sanchez P. Del Amo; Di Crescenzo A.; Di Ferdinando D.; Di Marco N.; Dracos M.; Duchesneau D.; Dzhatdoev T.; Ereditato A.; Fornari F.; Galati G.; Garfagnini A.; Goldberg J.; Gornushkin Y.; Grella G.; Guler A. M.; Gustavino C.; Hagner C.; Hara T.; Hayakawa H.; Hollnagel A.; Hosseini B.; Ishiguro K.; Jakovcic K.; Jollet C.; Kamiscioglu C.; Kamiscioglu M.; Kim J. H.; Kim S. H.; Kitagawa N.; Klicek B.; Kreslo I.; Laudisio F.; Lauria A.; Ljubicic A.; Longhin A.; Loverre P. F.; Malgin A.; Malenica M.; Mandrioli G.; Matsuo T.; Matsushita T.; Matveev V.; Mauri N.; Medinaceli E.; Meregaglia A.; Mikado S.; Miyanishi M.; Mizutani F.; Monacelli P.; Montesi M. C.; Morishima K.; Muciaccia M. T.; Naganawa N.; Naka T.; Nakamura M.; Nakano T.; Nakatsuka Y.; Niwa K.; Ogawa S.; Olchevsky A.; Omura T.; Ozaki K.; Paoloni A.; Paparella L.; Park B. D.; Park I. G.; Pasqualini L.; Pastore A.; Patrizii L.; Roda M.; Pessard H.; Pistillo C.; Podgrudkov D.; Polukhina N.; Pozzato M.; Pupilli F.; Roganova T.; Ryazhskaya O.; Sato O.; Schembri A.; Shakirianova I.; Shchedrina T.; Shoziyoev G.; Sioli M.; Sirignano C.; Sirri G.; Sotnikov A.; Spinetti M.; Stanco L.; Starkov N.; Stellacci S. M.; Stipcevic M.; Strolin P.; Takahashi S.; Tenti M.; Terranova F.; Tioukov V.; Tufanli S.; Vilain P.; Vladymyrov M.; Wilquet G.; Wonsak B.; Yoon C. S.; Votano L.; Vuilleumier J. L.; Rokujo H.; Komatsu M.; Kose U.; Rosa G.; Schmidt-Parzefall W.; Sheshukov A.; Chukanov A.; Consiglio L.; DAmbrosio N.; De Serio M.; Dusini S.; Bozza C.; Fini R. A.; Fukuda T.; Zemskova S.; Buettner B.; Dmitrievski S.; Ebert J.; Shiraishi T.; Shibuya H.; Buontempo S.; Kodama K.; Simone S.;

  • 作者单位

    Russian Acad Sci, Inst Nucl Res, RUS-117312 Moscow, Russia.;

    Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy.;

    Moscow MV Lomonosov State Univ, SINP MSU Skobeltsyn Inst Nucl Phys, RUS-119991 Moscow, Russia.;

    Kobe Univ, J-6578501 Kobe, Hyogo, Japan.;

    Univ Bern, High Energy Phys Lab, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland.;

    Middle E Tech Univ, TR-06531 Ankara, Turkey.;

    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;

    Joint Inst Nucl Res, RUS-141980 Dubna, Russia.;

    Univ Bern, High Energy Phys Lab, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland.;

    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;

    Univ Naples Federico II, Dipartimento Fis, I-80125 Naples, Italy.;

    Russian Acad Sci, PN Lebedev Phys Inst, RUS-119991 Moscow, Russia.;

    Univ Naples Federico II, Dipartimento Fis, I-80125 Naples, Italy.;

    Univ Savoie Mt Blanc, CNRS, LAPP, IN2P3, F-74941 Annecy Le Vieux, France.;

    Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy.;

    Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy.;

    Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Laquila, Italy.;

    Univ Strasbourg, CNRS, IN2P3, IPHC, F-67037 Strasbourg, France.;

    Univ Savoie Mt Blanc, CNRS, LAPP, IN2P3, F-74941 Annecy Le Vieux, France.;

    Moscow MV Lomonosov State Univ, SINP MSU Skobeltsyn Inst Nucl Phys, RUS-119991 Moscow, Russia.;

    Univ Bern, High Energy Phys Lab, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland.;

    Univ Bologna, Dipartmento Fis & Astron, I-40127 Bologna, Italy.;

    Univ Naples Federico II, Dipartimento Fis, I-80125 Naples, Italy.;

    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;

    Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel.;

    Joint Inst Nucl Res, RUS-141980 Dubna, Russia.;

    Ist Nazl Fis Nucl, Grp Collegato, I-84084 Salerno, Italy.;

    Middle E Tech Univ, TR-06531 Ankara, Turkey.;

    Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.;

    Univ Hamburg, D-22761 Hamburg, Germany.;

    Kobe Univ, J-6578501 Kobe, Hyogo, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Univ Hamburg, D-22761 Hamburg, Germany.;

    Univ Naples Federico II, Dipartimento Fis, I-80125 Naples, Italy.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Rudjer Boskovic Inst, HR-10002 Zagreb, Croatia.;

    Univ Strasbourg, CNRS, IN2P3, IPHC, F-67037 Strasbourg, France.;

    Middle E Tech Univ, TR-06531 Ankara, Turkey.;

    Middle E Tech Univ, TR-06531 Ankara, Turkey.;

    Gyeongsang Natl Univ, Jinju 660701, South Korea.;

    Gyeongsang Natl Univ, Jinju 660701, South Korea.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Rudjer Boskovic Inst, HR-10002 Zagreb, Croatia.;

    Univ Bern, High Energy Phys Lab, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland.;

    Ist Nazl Fis Nucl, Grp Collegato, I-84084 Salerno, Italy.;

    Univ Naples Federico II, Dipartimento Fis, I-80125 Naples, Italy.;

    Rudjer Boskovic Inst, HR-10002 Zagreb, Croatia.;

    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Roma, Italy.;

    Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.;

    Russian Acad Sci, Inst Nucl Res, RUS-117312 Moscow, Russia.;

    Rudjer Boskovic Inst, HR-10002 Zagreb, Croatia.;

    Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy.;

    Toho Univ, J-2748510 Funabashi, Chiba, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Russian Acad Sci, Inst Nucl Res, RUS-117312 Moscow, Russia.;

    Univ Bologna, Dipartmento Fis & Astron, I-40127 Bologna, Italy.;

    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;

    Univ Strasbourg, CNRS, IN2P3, IPHC, F-67037 Strasbourg, France.;

    Nihon Univ, J-2758576 Narashino, Chiba, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Kobe Univ, J-6578501 Kobe, Hyogo, Japan.;

    Ist Nazl Fis Nucl, Sez Roma, I-00185 Rome, Italy.;

    Univ Naples Federico II, Dipartimento Fis, I-80125 Naples, Italy.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Toho Univ, J-2748510 Funabashi, Chiba, Japan.;

    Joint Inst Nucl Res, RUS-141980 Dubna, Russia.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Kobe Univ, J-6578501 Kobe, Hyogo, Japan.;

    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Roma, Italy.;

    Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.;

    Gyeongsang Natl Univ, Jinju 660701, South Korea.;

    Gyeongsang Natl Univ, Jinju 660701, South Korea.;

    Univ Bologna, Dipartmento Fis & Astron, I-40127 Bologna, Italy.;

    Univ Bari, Dipartimento Fis, I-70126 Bari, Italy.;

    Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy.;

    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;

    Univ Savoie Mt Blanc, CNRS, LAPP, IN2P3, F-74941 Annecy Le Vieux, France.;

    Univ Bern, High Energy Phys Lab, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland.;

    Moscow MV Lomonosov State Univ, SINP MSU Skobeltsyn Inst Nucl Phys, RUS-119991 Moscow, Russia.;

    Russian Acad Sci, PN Lebedev Phys Inst, RUS-119991 Moscow, Russia.;

    Univ Bologna, Dipartmento Fis & Astron, I-40127 Bologna, Italy.;

    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Roma, Italy.;

    Moscow MV Lomonosov State Univ, SINP MSU Skobeltsyn Inst Nucl Phys, RUS-119991 Moscow, Russia.;

    Russian Acad Sci, Inst Nucl Res, RUS-117312 Moscow, Russia.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67010 Laquila, Italy.;

    Russian Acad Sci, Inst Nucl Res, RUS-117312 Moscow, Russia.;

    Russian Acad Sci, PN Lebedev Phys Inst, RUS-119991 Moscow, Russia.;

    Moscow MV Lomonosov State Univ, SINP MSU Skobeltsyn Inst Nucl Phys, RUS-119991 Moscow, Russia.;

    Univ Bologna, Dipartmento Fis & Astron, I-40127 Bologna, Italy.;

    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;

    Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy.;

    Joint Inst Nucl Res, RUS-141980 Dubna, Russia.;

    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Roma, Italy.;

    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;

    Russian Acad Sci, PN Lebedev Phys Inst, RUS-119991 Moscow, Russia.;

    Ist Nazl Fis Nucl, Grp Collegato, I-84084 Salerno, Italy.;

    Rudjer Boskovic Inst, HR-10002 Zagreb, Croatia.;

    Univ Naples Federico II, Dipartimento Fis, I-80125 Naples, Italy.;

    Kobe Univ, J-6578501 Kobe, Hyogo, Japan.;

    Ist Nazl Fis Nucl, Sez Bologna, I-40127 Bologna, Italy.;

    Univ Milano Bicocca, Dipartimento Fis, I-20126 Milan, Italy.;

    Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy.;

    Univ Bern, High Energy Phys Lab, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland.;

    Univ Libre Bruxelles, IIHE, B-1050 Brussels, Belgium.;

    Russian Acad Sci, PN Lebedev Phys Inst, RUS-119991 Moscow, Russia.;

    Univ Libre Bruxelles, IIHE, B-1050 Brussels, Belgium.;

    Univ Hamburg, D-22761 Hamburg, Germany.;

    Gyeongsang Natl Univ, Jinju 660701, South Korea.;

    Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Roma, Italy.;

    Univ Bern, High Energy Phys Lab, Albert Einstein Ctr Fundamental Phys, CH-3012 Bern, Switzerland.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;

    Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy.;

    Univ Hamburg, D-22761 Hamburg, Germany.;

    Joint Inst Nucl Res, RUS-141980 Dubna, Russia.;

    Joint Inst Nucl Res, RUS-141980 Dubna, Russia.;

    Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy.;

    Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.;

    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;

    Ist Nazl Fis Nucl, Grp Collegato, I-84084 Salerno, Italy.;

    Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.;

    Toho Univ, J-2748510 Funabashi, Chiba, Japan.;

    Joint Inst Nucl Res, RUS-141980 Dubna, Russia.;

    Univ Hamburg, D-22761 Hamburg, Germany.;

    Joint Inst Nucl Res, RUS-141980 Dubna, Russia.;

    Univ Hamburg, D-22761 Hamburg, Germany.;

    Nagoya Univ, J-4648602 Nagoya, Aichi, Japan.;

    Toho Univ, J-2748510 Funabashi, Chiba, Japan.;

    Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy.;

    Aichi Univ Educ, J-4488542 Kariya, Aichi, Japan.;

    Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.;

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