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Title: Charmonium and Charmonium-like (?) States

Abstract

The last few years have witnessed a renaissance in the spectroscopy of heavy quarks. Several long elusive states have now been firmly identified, and several unexpected states have been reported by the high luminosity experiments at Belle, Babar, CLEO, and Fermilab. These discoveries have posed important theoretical questions for our understanding of QCD, and a variety of theoretical models have been proposed. These developments are critically discussed.

Authors:
 [1]
  1. Department of Physics and Astronomy, Northwestern University, Evanston, IL, 60208 (United States)
Publication Date:
OSTI Identifier:
21056852
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 892; Journal Issue: 1; Conference: QCHS7: 7. conference on quark confinement and the hadron spectrum, Ponta Delgada, Acores (Portugal), 2-7 Sep 2006; Other Information: DOI: 10.1063/1.2714414; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; B QUARKS; BEAM LUMINOSITY; C QUARKS; CESR STORAGE RING; CHARMONIUM; FERMILAB; MESON SPECTROSCOPY; MULTIPARTICLE SPECTROMETERS; PARTICLE IDENTIFICATION; QUANTUM CHROMODYNAMICS; T QUARKS

Citation Formats

Seth, Kamal K. Charmonium and Charmonium-like (?) States. United States: N. p., 2007. Web. doi:10.1063/1.2714414.
Seth, Kamal K. Charmonium and Charmonium-like (?) States. United States. doi:10.1063/1.2714414.
Seth, Kamal K. Tue . "Charmonium and Charmonium-like (?) States". United States. doi:10.1063/1.2714414.
@article{osti_21056852,
title = {Charmonium and Charmonium-like (?) States},
author = {Seth, Kamal K.},
abstractNote = {The last few years have witnessed a renaissance in the spectroscopy of heavy quarks. Several long elusive states have now been firmly identified, and several unexpected states have been reported by the high luminosity experiments at Belle, Babar, CLEO, and Fermilab. These discoveries have posed important theoretical questions for our understanding of QCD, and a variety of theoretical models have been proposed. These developments are critically discussed.},
doi = {10.1063/1.2714414},
journal = {AIP Conference Proceedings},
number = 1,
volume = 892,
place = {United States},
year = {Tue Feb 27 00:00:00 EST 2007},
month = {Tue Feb 27 00:00:00 EST 2007}
}
  • Spectroscopy results for Belle and BaBar are reported. A particular focus is put on new results of the X(3872) state with its radiative decays to J/{psi}{gamma} and {psi}'{gamma} its decay into J/{psi}3{pi} and the search for production in radiative Upsilon decays. Another focus is L = 2 mesons, in particlar a possible D-wave assignment to the X(3872) and the confirmation of an Upsilon D-wave state.
  • We present recent results on charmonium and charmonium-like states from the BaBar B-factory located at the PEP-II asymmetric energy e{sup +}e{sup -} storage ring at the SLAC National Accelerator Laboratory.
  • The most recent results obtained for charged charmonium-like states in the Belle experiment are presented.
  • We give an overview on X(3872), Z(3930), Y(3940) and X(3940) resonances observed by the Belle detector at asymmetric energy e+e- KEKB collider and consider their possible interpretations.
  • Many new states have been recently discovered at the B-factories above the DD-bar threshold in the charmonium energy region. While some of them appear to be consistent with conventional cc-bar states others do not fit with any charmonium model expectation. A review of some of these new state is presented.