6,595 research outputs found
SPQR -- Spectroscopy: Prospects, Questions & Results
Tremendous progress has been made in mapping out the spectrum of hadrons over
the past decade with plans to make further advances in the decade ahead.
Baryons and mesons, both expected and unexpected, have been found, the results
of precision experiments often with polarized beams, polarized targets and
sometimes polarization of the final states. All these hadrons generate poles in
the complex energy plane that are consequences of strong coupling QCD. They
reveal how this works.Comment: 6 pages, 3 figures. The opening talk at the 13th International
Conference on Meson-Nucleon Physics and the Structure of the Nucleon
(MENU2013), Rome, September 30th-October 4th, 201
Light Mesons: Scalargators in Florida
Light scalar mesons abound in hadron processes, like the alligators in the
Florida Everglades. Moreover, scalars are intimately tied to the vacuum
structure of QCD. They are the product of many decays. Consequently, a rich
source of recent information about them has come from experiments producing
heavy flavour mesons. Indeed, scalars will continue to dominate many of the
processes to be studied at forthcoming facilities like BESIII in Beijing, FAIR
at GSI Darmstadt and the GlueX experiment at JLab, making an understanding (or
at least an excellent and theoretically consistent description) essential for
the physics missions of these facilities.Comment: 10 pages, 11 figures. Invited review at XIII International Conference
on Hadron Spectroscopy, November 29-December 4, 2009, Florida State
University, Tallahasse
Impressions of the Meson Spectrum: Hybrids & Exotics, present and future
It has long been expected that the spectrum of hadrons in QCD would be far
richer and extensive than experiment has so far revealed. While there have been
experimental hints of this richness for some time, it is really only in the
last few years that dramatic progress has been seen in the exploration both
experimentally and in calculations on the lattice. Precision studies enabled by
new technology both with detectors and high performance computations are
converging on an understanding of the spectrum in strong coupling QCD.
These methodologies are laying the foundation for a decade of potential
discovery that electro and photoproduction experiments at Jefferson Lab, which
when combined with key results on and charmonium decays from both
and colliders, should turn mere impressions of the light meson spectrum
into a high definition picture.Comment: 9 pages, 7 figure
Understanding the baryon and meson spectra
A brief overview is given of what we know of the baryon and meson spectra,
with a focus on what are the key internal degrees of freedom and how these
relate to strong coupling QCD. The challenges, experimental, theoretical and
phenomenological, for the future are outlined, with particular reference to a
program at Jefferson Lab to extract hadronic states in which glue unambiguously
contributes to their quantum numbers.Comment: 10 pages, 5 figures. Invited talk at the Eleventh Conference on the
Intersections of Particle and Nuclear Physics (CIPANP 2012), St Petersburg,
Florida. May29-June 3, 201
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