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Title: Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/c{sup 2} in the Reaction e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) Measured at BABAR

Abstract

We present a measurement of the cross section of the process e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at the SLAC PEP-II e{sup +}e{sup -} storage rings. The study is based on 298 fb{sup -1} of data recorded with the BABAR detector. A structure is observed in the cross section not far above threshold, near 4.32 GeV. We also investigate the compatibility of this structure with the Y(4260) previously reported by this experiment.

Authors:
; ; ; ; ; ; ; ; ;  [1];  [2];  [3]; ; ; ; ;  [4]; ; ;  [5]
  1. Laboratoire de Physique des Particules, F-74941 Annecy-le-Vieux (France)
  2. Universitat de Barcelona, Facultat de Fisica Dept. ECM, E-08028 Barcelona (Spain)
  3. Universita di Bari, Dipartimento di Fisica and INFN, I-70126 Bari (Italy)
  4. Institute of High Energy Physics, Beijing 100039 (China)
  5. University of Bergen, Institute of Physics, N-5007 Bergen (Norway) (and others)
Publication Date:
OSTI Identifier:
20951393
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 21; Other Information: DOI: 10.1103/PhysRevLett.98.212001; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CENTER-OF-MASS SYSTEM; COLLIDING BEAMS; CROSS SECTIONS; ELECTRON BEAMS; GEV RANGE 01-10; MASS SPECTRA; PAIR PRODUCTION; PARTICLE DECAY; PIONS MINUS; PIONS PLUS; POSITRON BEAMS; STANFORD LINEAR ACCELERATOR CENTER; STORAGE RINGS

Citation Formats

Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J. P., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Ofte, I., and Stugu, B.. Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/c{sup 2} in the Reaction e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) Measured at BABAR. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.212001.
Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J. P., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Ofte, I., & Stugu, B.. Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/c{sup 2} in the Reaction e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) Measured at BABAR. United States. doi:10.1103/PHYSREVLETT.98.212001.
Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J. P., Poireau, V., Tisserand, V., Zghiche, A., Grauges, E., Palano, A., Chen, J. C., Qi, N. D., Rong, G., Wang, P., Zhu, Y. S., Eigen, G., Ofte, I., and Stugu, B.. Fri . "Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/c{sup 2} in the Reaction e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) Measured at BABAR". United States. doi:10.1103/PHYSREVLETT.98.212001.
@article{osti_20951393,
title = {Evidence of a Broad Structure at an Invariant Mass of 4.32 GeV/c{sup 2} in the Reaction e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) Measured at BABAR},
author = {Aubert, B. and Barate, R. and Bona, M. and Boutigny, D. and Couderc, F. and Karyotakis, Y. and Lees, J. P. and Poireau, V. and Tisserand, V. and Zghiche, A. and Grauges, E. and Palano, A. and Chen, J. C. and Qi, N. D. and Rong, G. and Wang, P. and Zhu, Y. S. and Eigen, G. and Ofte, I. and Stugu, B.},
abstractNote = {We present a measurement of the cross section of the process e{sup +}e{sup -}{yields}{pi}{sup +}{pi}{sup -}{psi}(2S) from threshold up to 8 GeV center-of-mass energy using events containing initial-state radiation, produced at the SLAC PEP-II e{sup +}e{sup -} storage rings. The study is based on 298 fb{sup -1} of data recorded with the BABAR detector. A structure is observed in the cross section not far above threshold, near 4.32 GeV. We also investigate the compatibility of this structure with the Y(4260) previously reported by this experiment.},
doi = {10.1103/PHYSREVLETT.98.212001},
journal = {Physical Review Letters},
number = 21,
volume = 98,
place = {United States},
year = {Fri May 25 00:00:00 EDT 2007},
month = {Fri May 25 00:00:00 EDT 2007}
}