Back
Full-text
Journal article

Observation of a New Narrow Axial-Vector Meson a1(1420).

  • Adolph C Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany.
  • Akhunzyanov R Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Alexeev MG University of Turin, Department of Physics, 10125 Turin, Italy.
  • Alexeev GD Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Amoroso A University of Turin, Department of Physics, 10125 Turin, Italy.
  • Andrieux V CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Anosov V Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Austregesilo A CERN, 1211 Geneva 23, Switzerland.
  • Azevedo C University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal.
  • Badełek B University of Warsaw, Faculty of Physics, 02-093 Warsaw, Poland.
  • Balestra F University of Turin, Department of Physics, 10125 Turin, Italy.
  • Barth J Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany.
  • Beck R Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany.
  • Bedfer Y CERN, 1211 Geneva 23, Switzerland.
  • Bernhard J CERN, 1211 Geneva 23, Switzerland.
  • Bicker K CERN, 1211 Geneva 23, Switzerland.
  • Bielert ER CERN, 1211 Geneva 23, Switzerland.
  • Birsa R Trieste Section of INFN, 34127 Trieste, Italy.
  • Bisplinghoff J Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany.
  • Bodlak M Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic.
  • Boer M CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Bordalo P LIP, 1000-149 Lisbon, Portugal.
  • Bradamante F University of Trieste, Department of Physics, 34127 Trieste, Italy.
  • Braun C Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany.
  • Bressan A University of Trieste, Department of Physics, 34127 Trieste, Italy.
  • Büchele M Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Burtin E CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Chang WC Academia Sinica, Institute of Physics, Taipei 11529, Taiwan.
  • Chiosso M University of Turin, Department of Physics, 10125 Turin, Italy.
  • Choi I University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA.
  • Chung SU Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Cicuttin A Trieste Section of INFN, 34127 Trieste, Italy.
  • Crespo ML Trieste Section of INFN, 34127 Trieste, Italy.
  • Curiel Q CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Dalla Torre S Trieste Section of INFN, 34127 Trieste, Italy.
  • Dasgupta SS Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India.
  • Dasgupta S Trieste Section of INFN, 34127 Trieste, Italy.
  • Denisov OY Torino Section of INFN, 10125 Turin, Italy.
  • Dhara L Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India.
  • Donskov SV State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Doshita N Yamagata University, Yamagata 992-8510 Japan.
  • Dünnweber W University of Eastern Piedmont, 15100 Alessandria, Italy.
  • Duic V University of Trieste, Department of Physics, 34127 Trieste, Italy.
  • Dziewiecki M Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
  • Efremov A Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Eversheim PD Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany.
  • Eyrich W Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany.
  • Faessler M University of Eastern Piedmont, 15100 Alessandria, Italy.
  • Ferrero A CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Finger M Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic.
  • Finger M Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic.
  • Fischer H Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Franco C LIP, 1000-149 Lisbon, Portugal.
  • du Fresne von Hohenesche N CERN, 1211 Geneva 23, Switzerland.
  • Friedrich JM Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Frolov V CERN, 1211 Geneva 23, Switzerland.
  • Gautheron F Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany.
  • Gavrichtchouk OP Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Gerassimov S Lebedev Physical Institute, 119991 Moscow, Russia.
  • Gnesi I University of Turin, Department of Physics, 10125 Turin, Italy.
  • Gorzellik M Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Grabmüller S Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Grasso A University of Turin, Department of Physics, 10125 Turin, Italy.
  • Grosse-Perdekamp M University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA.
  • Grube B Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Grussenmeyer T Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Guskov A Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Haas F Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Hahne D Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany.
  • von Harrach D Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.
  • Hashimoto R Yamagata University, Yamagata 992-8510 Japan.
  • Heinsius FH Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Herrmann F Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Hinterberger F Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany.
  • Horikawa N Nagoya University, 464 Nagoya, Japan.
  • d'Hose N CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Hsieh CY Academia Sinica, Institute of Physics, Taipei 11529, Taiwan.
  • Huber S Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Ishimoto S Yamagata University, Yamagata 992-8510 Japan.
  • Ivanov A Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Ivanshin Y Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Iwata T Yamagata University, Yamagata 992-8510 Japan.
  • Jahn R Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany.
  • Jary V Czech Technical University in Prague, 16636 Prague, Czech Republic.
  • Jörg P Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Joosten R Universität Bonn, Helmholtz-Institut für Strahlen- und Kernphysik, 53115 Bonn, Germany.
  • Kabuß E Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.
  • Ketzer B Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Khaustov GV State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Khokhlov YA State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Kisselev Y Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Klein F Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany.
  • Klimaszewski K National Centre for Nuclear Research, 00-681 Warsaw, Poland.
  • Koivuniemi JH Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany.
  • Kolosov VN State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Kondo K Yamagata University, Yamagata 992-8510 Japan.
  • Königsmann K Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Konorov I Lebedev Physical Institute, 119991 Moscow, Russia.
  • Konstantinov VF State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Kotzinian AM University of Turin, Department of Physics, 10125 Turin, Italy.
  • Kouznetsov O Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Krämer M Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Kremser P Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Krinner F Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Kroumchtein ZV Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Kuchinski N Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Kunne F CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Kurek K National Centre for Nuclear Research, 00-681 Warsaw, Poland.
  • Kurjata RP Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
  • Lednev AA State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Lehmann A Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany.
  • Levillain M CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Levorato S Trieste Section of INFN, 34127 Trieste, Italy.
  • Lichtenstadt J Tel Aviv University, School of Physics and Astronomy, 69978 Tel Aviv, Israel.
  • Maggiora A Torino Section of INFN, 10125 Turin, Italy.
  • Magnon A CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Makins N University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA.
  • Makke N University of Trieste, Department of Physics, 34127 Trieste, Italy.
  • Mallot GK CERN, 1211 Geneva 23, Switzerland.
  • Marchand C CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Martin A University of Trieste, Department of Physics, 34127 Trieste, Italy.
  • Marzec J Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
  • Matousek J Charles University in Prague, Faculty of Mathematics and Physics, 18000 Prague, Czech Republic.
  • Matsuda H Yamagata University, Yamagata 992-8510 Japan.
  • Matsuda T University of Miyazaki, Miyazaki 889-2192, Japan.
  • Meshcheryakov G Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Meyer W Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany.
  • Michigami T Yamagata University, Yamagata 992-8510 Japan.
  • Mikhailov YV State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Miyachi Y Yamagata University, Yamagata 992-8510 Japan.
  • Nagaytsev A Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Nagel T Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Nerling F Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.
  • Neyret D CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Nikolaenko VI State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Novy J CERN, 1211 Geneva 23, Switzerland.
  • Nowak WD Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Nunes AS LIP, 1000-149 Lisbon, Portugal.
  • Olshevsky AG Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Orlov I Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Ostrick M Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.
  • Panzieri D University of Eastern Piedmont, 15100 Alessandria, Italy.
  • Parsamyan B University of Turin, Department of Physics, 10125 Turin, Italy.
  • Paul S Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Peng JC University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA.
  • Pereira F University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal.
  • Pesek M Czech Technical University in Prague, 16636 Prague, Czech Republic.
  • Peshekhonov DV Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Platchkov S CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Pochodzalla J Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.
  • Polyakov VA State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Pretz J Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany.
  • Quaresma M LIP, 1000-149 Lisbon, Portugal.
  • Quintans C LIP, 1000-149 Lisbon, Portugal.
  • Ramos S LIP, 1000-149 Lisbon, Portugal.
  • Regali C Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Reicherz G Universität Bochum, Institut für Experimentalphysik, 44780 Bochum, Germany.
  • Riedl C University of Illinois at Urbana-Champaign, Department of Physics, Urbana, Illinois 61801-3080, USA.
  • Rocco E CERN, 1211 Geneva 23, Switzerland.
  • Rossiyskaya NS Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Ryabchikov DI State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Rychter A Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
  • Samoylenko VD State Scientific Center Institute for High Energy Physics of National Research Center 'Kurchatov Institute', 142281 Protvino, Russia.
  • Sandacz A National Centre for Nuclear Research, 00-681 Warsaw, Poland.
  • Santos C Trieste Section of INFN, 34127 Trieste, Italy.
  • Sarkar S Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India.
  • Savin IA Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Sbrizzai G University of Trieste, Department of Physics, 34127 Trieste, Italy.
  • Schiavon P University of Trieste, Department of Physics, 34127 Trieste, Italy.
  • Schmeing S Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Schmidt K Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Schmieden H Universität Bonn, Physikalisches Institut, 53115 Bonn, Germany.
  • Schönning K CERN, 1211 Geneva 23, Switzerland.
  • Schopferer S Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Schlüter T University of Eastern Piedmont, 15100 Alessandria, Italy.
  • Selyunin A Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Shevchenko OY Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Silva L LIP, 1000-149 Lisbon, Portugal.
  • Sinha L Matrivani Institute of Experimental Research & Education, Calcutta-700 030, India.
  • Sirtl S Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Slunecka M Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Sozzi F Trieste Section of INFN, 34127 Trieste, Italy.
  • Srnka A Institute of Scientific Instruments, AS CR, 61264 Brno, Czech Republic.
  • Stolarski M LIP, 1000-149 Lisbon, Portugal.
  • Sulc M Technical University in Liberec, 46117 Liberec, Czech Republic.
  • Suzuki H Yamagata University, Yamagata 992-8510 Japan.
  • Szabelski A National Centre for Nuclear Research, 00-681 Warsaw, Poland.
  • Szameitat T Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Sznajder P National Centre for Nuclear Research, 00-681 Warsaw, Poland.
  • Takekawa S University of Turin, Department of Physics, 10125 Turin, Italy.
  • Ter Wolbeek J Universität Freiburg, Physikalisches Institut, 79104 Freiburg, Germany.
  • Tessaro S Trieste Section of INFN, 34127 Trieste, Italy.
  • Tessarotto F Trieste Section of INFN, 34127 Trieste, Italy.
  • Thibaud F CEA IRFU/SPhN Saclay, 91191 Gif-sur-Yvette, France.
  • Tskhay V Lebedev Physical Institute, 119991 Moscow, Russia.
  • Uhl S Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Veloso J University of Aveiro, Department of Physics, 3810-193 Aveiro, Portugal.
  • Virius M Czech Technical University in Prague, 16636 Prague, Czech Republic.
  • Wallner S Technische Universität München, Physik Department, 85748 Garching, Germany.
  • Weisrock T Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.
  • Wilfert M Universität Mainz, Institut für Kernphysik, 55099 Mainz, Germany.
  • Zaremba K Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
  • Zavertyaev M Lebedev Physical Institute, 119991 Moscow, Russia.
  • Zemlyanichkina E Joint Institute for Nuclear Research, 141980 Dubna, Moscow region, Russia.
  • Ziembicki M Warsaw University of Technology, Institute of Radioelectronics, 00-665 Warsaw, Poland.
  • Zink A Universität Erlangen-Nürnberg, Physikalisches Institut, 91054 Erlangen, Germany.
Show more…
  • 2015-09-05
Published in:
  • Physical review letters. - 2015
English The COMPASS Collaboration at CERN has measured diffractive dissociation of 190  GeV/c pions into the π(-)π(-)π(+) final state using a stationary hydrogen target. A partial-wave analysis (PWA) was performed in bins of 3π mass and four-momentum transfer using the isobar model and the so far largest PWA model consisting of 88 waves. A narrow peak is observed in the f0(980)π channel with spin, parity and C-parity quantum numbers J(PC)=1(++). We present a resonance-model study of a subset of the spin-density matrix selecting 3π states with J(PC)=2(++) and 4(++) decaying into ρ(770)π and with J(PC)=1(++) decaying into f0(980)π. We identify a new a1 meson with mass (1414(-13)(+15))  MeV/c2 and width (153(-23)(+8))  MeV/c2. Within the final states investigated in our analysis, we observe the new a1(1420) decaying only into f0(980)π, suggesting its exotic nature.
Language
  • English
Open access status
hybrid
Identifiers
Persistent URL
https://sonar.ch/global/documents/112211
Statistics
Document views: 27 File downloads:
  • Full-text: 0