Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2015 Aug 21;115(8):082001.
doi: 10.1103/PhysRevLett.115.082001. Epub 2015 Aug 19.

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

C Adolph  1 R Akhunzyanov  2 M G Alexeev  3 G D Alexeev  2 A Amoroso  3   4 V Andrieux  5 V Anosov  2 A Austregesilo  6   7 C Azevedo  8 B Badełek  9 F Balestra  3   4 J Barth  10 R Beck  11 Y Bedfer  6   5 J Bernhard  6   12 K Bicker  6   7 E R Bielert  6 R Birsa  13 J Bisplinghoff  11 M Bodlak  14 M Boer  5 P Bordalo  15 F Bradamante  16   13 C Braun  1 A Bressan  16   13 M Büchele  17 E Burtin  5 W-C Chang  18 M Chiosso  3   4 I Choi  19 S U Chung  7 A Cicuttin  13   20 M L Crespo  13   20 Q Curiel  5 S Dalla Torre  13 S S Dasgupta  21 S Dasgupta  13 O Yu Denisov  4 L Dhara  21 S V Donskov  22 N Doshita  23 W Dünnweber  24   8   25   11   10   26   21   2   1   17   6   27   15   12   28   29   7   30   14   31   22   5   18   32   16   13   20   3   4   19   33   9   34   23 V Duic  16 M Dziewiecki  34 A Efremov  2 P D Eversheim  11 W Eyrich  1 M Faessler  24   8   25   11   10   26   21   2   1   17   6   27   15   12   28   29   7   30   14   31   22   5   18   32   16   13   20   3   4   19   33   9   34   23 A Ferrero  5 M Finger  14 M Finger  14 H Fischer  17 C Franco  15 N du Fresne von Hohenesche  6   12 J M Friedrich  7 V Frolov  6 F Gautheron  25 O P Gavrichtchouk  2 S Gerassimov  29   7 I Gnesi  3   4 M Gorzellik  17 S Grabmüller  7 A Grasso  3   4 M Grosse-Perdekamp  19 B Grube  7 T Grussenmeyer  17 A Guskov  2 F Haas  7 D Hahne  10 D von Harrach  12 R Hashimoto  23 F H Heinsius  17 F Herrmann  17 F Hinterberger  11 N Horikawa  30 N d'Hose  5 C-Yu Hsieh  18 S Huber  7 S Ishimoto  23 A Ivanov  2 Yu Ivanshin  2 T Iwata  23 R Jahn  11 V Jary  31 P Jörg  17 R Joosten  11 E Kabuß  12 B Ketzer  7 G V Khaustov  22 Yu A Khokhlov  22 Yu Kisselev  2 F Klein  10 K Klimaszewski  33 J H Koivuniemi  25 V N Kolosov  22 K Kondo  23 K Königsmann  17 I Konorov  29   7 V F Konstantinov  22 A M Kotzinian  3   4 O Kouznetsov  2 M Krämer  7 P Kremser  17 F Krinner  7 Z V Kroumchtein  2 N Kuchinski  2 F Kunne  5 K Kurek  33 R P Kurjata  34 A A Lednev  22 A Lehmann  1 M Levillain  5 S Levorato  13 J Lichtenstadt  32 A Maggiora  4 A Magnon  5 N Makins  19 N Makke  16   13 G K Mallot  6 C Marchand  5 A Martin  16   13 J Marzec  34 J Matousek  14 H Matsuda  23 T Matsuda  28 G Meshcheryakov  2 W Meyer  25 T Michigami  23 Yu V Mikhailov  22 Y Miyachi  23 A Nagaytsev  2 T Nagel  7 F Nerling  12 D Neyret  5 V I Nikolaenko  22 J Novy  6   31 W-D Nowak  17 A S Nunes  15 A G Olshevsky  2 I Orlov  2 M Ostrick  12 D Panzieri  24   4 B Parsamyan  3   4 S Paul  7 J-C Peng  19 F Pereira  8 M Pesek  31 D V Peshekhonov  2 S Platchkov  5 J Pochodzalla  12 V A Polyakov  22 J Pretz  10 M Quaresma  15 C Quintans  15 S Ramos  15 C Regali  17 G Reicherz  25 C Riedl  19 E Rocco  6 N S Rossiyskaya  2 D I Ryabchikov  22 A Rychter  34 V D Samoylenko  22 A Sandacz  33 C Santos  13 S Sarkar  21 I A Savin  2 G Sbrizzai  16   13 P Schiavon  16   13 S Schmeing  7 K Schmidt  17 H Schmieden  10 K Schönning  6 S Schopferer  17 T Schlüter  24   8   25   11   10   26   21   2   1   17   6   27   15   12   28   29   7   30   14   31   22   5   18   32   16   13   20   3   4   19   33   9   34   23 A Selyunin  2 O Yu Shevchenko  2 L Silva  15 L Sinha  21 S Sirtl  17 M Slunecka  2 F Sozzi  13 A Srnka  26 M Stolarski  15 M Sulc  27 H Suzuki  23 A Szabelski  33 T Szameitat  17 P Sznajder  33 S Takekawa  3   4 J Ter Wolbeek  17 S Tessaro  13 F Tessarotto  13 F Thibaud  5 V Tskhay  29 S Uhl  7 J Veloso  8 M Virius  31 S Wallner  7 T Weisrock  12 M Wilfert  12 K Zaremba  34 M Zavertyaev  29 E Zemlyanichkina  2 M Ziembicki  34 A Zink  1 COMPASS Collaboration
Affiliations
Free article

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

C Adolph et al. Phys Rev Lett. .
Free article

Abstract

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.

PubMed Disclaimer

LinkOut - more resources