38,251 research outputs found
Meson2006 Summary: Theory
This is a summary of theoretical plenary contributions to the biennial hadron
physics conference Meson2006, which was the ninth in this series. The topics
covered in the meeting include low energy pion-pion and pion-nucleon
interactions, photoproduction and hadronic production of light mesons and
baryons,in-medium effects, recent developments in charmed mesons, charmonia and
B mesons, the status of exotica, and some related topics such as final state
interactions. In this contribution we review and summarize the plenary talks
presented by theorists at the meeting, and emphasize some of the main points of
their presentations. Where appropriate we will add brief comments on some
aspects of QCD spectroscopy. Finally, following tradition, we conclude with a
new Feynman story.Comment: 4 pages, 1 Feynman story. Invited summary talk (theory) at the 9th
International Workshop on Meson Production, Properties and Interactions
MESON2006 (Krakow, 9-13 June 2006
Photoproduction of Hybrid Mesons
In this contribution I discuss prospects for photoproducing hybrid mesons at
CEBAF, based on recent model results and experimental indications of possible
hybrids. One excellent opportunity appears to be a search for the I=1, JPC=2+-,
neutral "(b2)o" hybrid in (a2 pi)o through diffractive photoproduction. Other
notable possibilities accessible through pi+ or pio exchange photoproduction
are I=1, JPC=1-+, charged "pi1+" in f1 pi+, (b1 pi)+ and (rho pi)+; piJ(1770)+
in f2 pi+ and (b1 pi)+; pi(1800)+ in f0 pi+, f2 pi+, omega rho+ and (rho pi)+;
a1 in f1 pi+ and f2 pi+; and omega in (rho pi)o, omega eta and (K1 K)o.Comment: 5 pages, 3 postscript figures. Invited contribution to Confinement
III, CEBAF (8-12 June 1998
HADRON05 Summary: Heavy Quark Hadrons and Theory
This HADRON05 summary covers the topics of (1) mesons containing heavy
quarks, and (2) theory. The new material discussed here is taken mainly from
plenary presentations. We specifically emphasize new or recent results in
spectroscopy that are likely to appear in future editions of the PDG. An
exception is made for the pentaquark, which has now been withdrawn. We
undoubtedly have something important to (re)learn about multiquarks from the
pentaquark saga, and this merits a phrase in Portuguese. The three general
areas we consider are: I. QQbar spectroscopy, II. Qqbar spectroscopy, and III.
lessons from the pentaquark. Finally, in Section IIIb. we conclude with "Our
moment of Zen".Comment: 14 pages, 10 eps figures. Presented at HADRON05 (Rio, 21-26 Aug.
2005
MESON2000 Conference Summary
This short contribution is a {\it lite} MESON2000 conference summary. As
appropriate for the 600th anniversary of the Jagellonian University, it begins
with a brief summary of the last 600 years of European history and its place in
hadron physics. Next a ``physicist chirality'' order parameter PC is
introduced. When applied to MESON2000 plenary speakers this order parameter
illustrates the separation of hadron physicists into disjoint communities. The
individual plenary talks in MESON2000 are next sorted according to the
subconference associated with each of the 36 plenary speakers. Finally, I
conclude with a previously unreported Feynman story regarding the use of models
in hadron physics.Comment: 11 pages, 3 figures, uses appolb.cps and epsfig. MESON2000 Conference
Summary Tal
Update on Charmonium Theory
In this invited presentation I review some recent developments in the theory
of charmonium that appear likely to be of importance for future experimental
studies in this field. The specific areas considered are double charmonium
production, LQCD studies of charmonium, recent results for hadron loops, c-cbar
production cross sections at PANDA, charm molecules, and two recent
developments, "charmiscelleny".Comment: 8 pp., 3 figures. Invited contribution to HADRON 2009 (XIIIth
Internatl. Conf. on Hadron Spectroscopy, Tallahassee, FL, Nov.29 - Dec.4
2009)
Psi to N Nbar m
In this invited talk I discuss two recent applications of charmonium (Psi)
decays to N Nbar m final states, where N is a nucleon and m is a light meson.
There are several motivations for studying these decays: 1) They are useful for
the study of N* spectroscopy; 2) they can be used to estimate cross sections
for the associated charmonium production processes p pbar to Psi m, which PANDA
plans to exploit in searches for charmonium hybrid exotics; and 3) they may
allow the direct experimental measurement of NNm (meson-nucleon) strong
couplings, which provide crucial input information for meson exchange models of
the NN force. The latter two topics are considered in this talk, which will
also compare results from a simple hadron pole model of these decays to recent
experimental data.Comment: Invited contribution to Charm2010 (Fourth International Workshop on
Charm Physics), Beijing, China, 21-24 Oct. 2010. 3 pages, 3 figures, uses
epsfi
CHARM2010: Theory Summary
This invited summary gives some concluding remarks regarding theoretical
aspects of the research presented at Charm2010. I will specialize to the role
of theory and the relative reach of theory and experiment in three of the major
areas of charm physics address at this conference, specifically 1) charm
production, 2) charm weak decays, and 3) charm hadron spectroscopy. After a
discussion of the status of progress on representative topics in each of these
areas I will conclude with a previously unrelated Feynman story from a
conference in the early days of charm.Comment: Invited Theory Summary, Charm2010 (The Fourth International Workshop
on Charm Physics), Beijing, China, 21-24 Oct. 2010. 6 pages, 6 figures, uses
epsfi
QCD Spectroscopy at Gsi: Exotica and Charmonia
In this talk I give a short summary of the basics of conventional and exotic
meson spectroscopy, and consider in particular those issues in the charmonium
and charmonium hybrid sectors which can be addressed by a future antiproton
facility at GSI.Comment: 14 pages, 5 figures. Hirschegg'01 Workshop on the Structure of
Hadrons, Hirschegg, Austria, 14-20 Jan 200
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