Observation of a Narrow Meson State Decaying to D s + π 0 at a Mass of 2.32 G e V / c 2
- Bernard Aubert
- R. Barate
- D. Boutigny
- J.-M. Gaillard
- A. Hicheur
- Y. Karyotakis
- J. P. Lees
- P. Robbe
- V. Tisserand
- Amina Zghiche
- ANTIMO PALANO
- A. Pompili
- J. C. Chen
- N. D. Qi
- G. Rong
- P. Wang
- Y. S. Zhu
- G. Eigen
- I. Ofte
- B. Stugu
- G. S. Abrams
- A. W. Borgland
- A. B. Breon
- David N. Brown
- Janice Button-Shafer
- R. N. Cahn
- E. Charles
- C. T. Day
- M. S. Gill
- Andrei V. Gritsan
- Y. Groysman
- R. G. Jacobsen
- R. W. Kadel
- John A. Kadyk
- Leroy T. Kerth
- Yu. G. Kolomensky
- J.F. Kral
- G. Kukartsev
- C. LeClerc
- M. E. Levi
- G. Lynch
- L. M. Mir
- P. J. Oddone
- T. J. Orimoto
- Morris Pripstein
- N. A. Roe
- Alexandru Romosan
- M. T. Ronan
- V. G. Shelkov
- A. V. Telnov
- W.A. Wenzel
- K. E. Ford
- T. Harrison
- C. M. Hawkes
- D. J. Knowles
- S. E. Morgan
- R. C. Penny
- A. T. Watson
- N. K. Watson
- T. Deppermann
- K. Goetzen
- H. Koch
- Bartłomiej Lewandowski
- M. Pelizaeus
- Κ. Peters
- H. Schmuecker
- M. Steinke
- N. Barlow
- J. Boyd
- N. Chevalier
- W. N. Cottingham
- M. Kelly
- T. Latham
- C. K. Mackay
- F. F. Wilson
- K. Abe
- Tülay Çuhadar-Dönszelmann
- Christopher Hearty
- T. S. Mattison
- J. A. McKenna
- D. Thiessen
- P. Kyberd
- A. K. McKemey
- V. E. Blinov
- A. D. Bukin
- Vladimir B. Golubev
- V. Ivanchenko
- E. A. Kravchenko
- A. P. Onuchin
- S. I. Serednyakov
- Yu. I. Skovpen
- E. P. Solodov
- A. N. Yushkov
- David William Best
- M. Chao
- D. Kirkby
- A. J. Lankford
- Mark A. Mandelkern
- S. J. McMahon
- R. K. Mommsen
- EREnrico Robutti
Physical Review Letters · 2003 · American Physical Society
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Abstract
We have observed a narrow state near $2.32\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/{c}^{2}$ in the inclusive ${D}_{s}^{+}{\ensuremath{\pi}}^{0}$ invariant mass distribution from ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data at energies near 10.6 GeV. The observed width is consistent with the experimental resolution. The small intrinsic width and the quantum numbers of the final state indicate that the decay violates isospin conservation. The state has natural spin-parity and the low mass suggests a ${J}^{P}={0}^{+}$ assignment. The data sample corresponds to an integrated luminosity of $91\text{ }{\mathrm{f}\mathrm{b}}^{\ensuremath{-}1}$ recorded by the BABAR detector at the SLAC PEP-II asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ storage ring.