[Iac_hadron_2015] Recommendations Hadron

Thu Jan 29 14:32:56 EST 2015

Dear colleagues,

   in the past fifteen years  decays of D and B mesons have been playing an
important role in hadron spectroscopy. While primarily focused on Flavor
Physics,
experiments such as E791, FOCUS, CLEOc, BES, Belle, BaBar, LHCb provided
many important measurements and discoveries: the sigma, the kappa, and
other measurements that helped the understanding of the nature of the light
scalars; the DsJ, the new XYZ hadrons, among other contributions.

   In recognition, in past editions of this conference series we had
sessions like
"Light quark spectroscopy from heavy meson decays". In what concerns the
spectroscopy of light hadrons, I believe it is time to change the direction
of the arrow.

   The ongoing experiments have collected very large samples of heavy meson
decays. Soon a new generation of experiments will be commissioned. This
brings
us to a precision era in Flavor Physics. However, to fully exploit the
potential of this
large amount of very good data, performing accurate measurements of the CKM
elements, mixing parameters, CP asymmetries, new Physics searches, the
input
from the hadron community is extremely necessary.

    The theoretical and experimental progress in our understanding of
two-body
systems must be incorporated into the many-body environment of hadronic
B and D decays, in a systematic and consistent way. A better understanding
of
the connection between quark and hadron degrees of freedom is also in order,
a necessary ingredient for sound parameterizations of nonresonant
amplitudes.
FSI is a complex subject, involving three- and four-body interactions, but
it should
also be taken into account. The application of fundamental principles and
symmetries, constraining the decay amplitudes is another issue: in decays
of
B_u mesons into three light hadrons, where CP asymmetries reach up to 80%
in regions of the phase space, FSI may couple different decay channels,
such
as B+->K+K-K+ and B->K+pi-pi+, in a beautiful realization of the CPT
symmetry.

   Before this becomes a manifesto, let me propose a parallel session
dedicated
to these subjects, a session containing both theory and experimental talks.
There
has been some scattered and disconnected initiatives in this direction. I
think the
Hadron conference would be a very appropriate occasion for such discussions.

With my best regards,
Alberto.

2015-01-29 15:45 GMT-02:00 Stephan Paul <stephan.paul at cern.ch>:

> Dear all
>
> I wanted to make another suggestion for a talk/speaker. Namely, COMPASS
> has published (PRL announced to come out next week) the pion polarizability
> with good precision. In addition, COMPASS had published dynamics of 3pi
> production at low masses and shown that it fits nicely to a detailed
> description of this process in 5D phase-space by ChiPT. We expect to also
> present the same process with 2 neutral pions in the final state, which
> probes the importance of loop corrections, within 2015. I thus think that
> an overview talk on ChiPT related experiments (not only COMPASS) would be
> suitable. One candidate speaker, who has pushed the corresponding COMPASS
> program and who understands the subject at depth  is J. Friedrich (TUM). I
> am not sure about the status of the present program, but it could be a nice
> complement for low energy QCD.
>
> With kind regards
> Stephan
>
>
> Am 14.01.2015 um 10:15 schrieb Eulogio Oset <Eulogio.Oset at ific.uv.es>:
>
> > Dear Mike: I am one of the people to get the email late. So here go some
> comments.
> > I support the choice
> > SPECTROSCOPY OF MESONS & BARYONS:
> > The Lambda(1405) (Tetsuo HYODO)
> >
> > I would suggest an additional  more general talk on hadron hadron
> interation, paying attention to symmetries, like chiral symmetry, heavy
> quark spin symmetry, and the appearance of dynamically generated
> resonances, or molecular hadronic states from this interaction, in a broad
> spectrum of energies, addressing the light, charm and bottom sectors, X,Y,Z
> states etc.
> >    A person with a broad experience in this topic is Juan Nieves
> >  Juan Miguel Nieves Pamplona <Juan.M.Nieves at ific.uv.es>
> >
> > HADRON SURPRISES
> >  I support the choice
> > --QCD on the lattice: spectrum, scattering and structure (Christian LANG)
> >
> > In addition it would be interesting a talk on Effective theories in
> finite volume, since they are proving very useful to interprete QCD lattice
> results and help determine strategies to obtain optimal information from
> QCD lattice simulations.
> >
> > People who could talk about that are
> > Akaki Rusetski, Ulf Meissner, or two younger people Michael Doring, or
> Alberto Martinez
> >
> > Ulf-G. Meissner <meissner at hiskp.uni-bonn.de>
> > Akaki Rusetsky <rusetsky at hiskp.uni-bonn.de>
> > Michael Doering <doring at gwu.edu>
> > Alberto Martinez Torres <amartine at if.usp.br>
> >
> >
> > LHCb is proving to be a factory of surprises with a substantial
> contribution to hadron spectroscopy and useful reactions telling about the
> nature of hadronic states.
> >
> > From the experimental side I could recommend two experimentalists who
> have shown much interest in digging into the meaning and repercussion of
> the measurements done
> > Sheldon Stone and Tim Gershon.
> > Sheldon Stone <stone at physics.syr.edu>
> > Tim Gershon <T.J.Gershon at warwick.ac.uk>
> >
> > There has been a parallel revival of theoretical work extracting
> interesting physics from these experiments, in addition to Babar, Belle,
> Bes and others.
> >  I could suggest some young people for that
> >  Ju Jun Xie,           谢聚军 <xiejujun at impcas.ac.cn>
> > Wei Hong Liang,            liangwh <liangwh at gxnu.edu.cn>
> > Miguel Albaladejo,          Miguel Albaladejo Serrano <
> miguel.albaladejo at ific.uv.es>
> >
> > QCD sum rules are still proving a useful tool to make predictions on
> hadronic states.
> > Good people for this subject can be
> > Fernando Navarra or Marina Nielsen
> > fernando Silveira Navarra <navarra at if.usp.br>
> > marina Nielsen <mnielsen at if.usp.br>
> >
> > Jefferson Lab has interesting work related to hadron spectroscopy with
> reactions like the photoproduction of the f2(1279) or the f0(980).  The
> photoproduction of the Lambda(1405) is done by Schumacher and Moriya,
> although it has been reported in may places already.  On the lab issues you
> can make your own selection.
> >
> > COMPASS and GLUEX will concentrate on three body issues. I think it
> would be interesting to invite some theoretical person who could report of
> hadronic three body states, two mesons and a baryon, one meson and two
> baryons, three mesons...
> > I can suggest two people, Alberto Martinez and Daisuke Jido
> >  Alberto Martinez Torres <amartine at if.usp.br>
> > jido >> Daisuke JIDO <jido at tmu.ac.jp>
> >
> >    Good luck in the Conference.
> >
> > Eulogio
> >
> > --
> > Eulogio Oset
> > Departamento de Fisica Teorica and IFIC, Universidad de Valencia
> >
> > Postal address:
> > IFIC, Parque Cientifico de la Universidad de Valencia
> >  C/ Catedratico Jose Beltran, 2
> > 46980 Paterna (SPAIN)
> > Telephone: +34 96 354 35 25
> > Fax:       +34 96 354 34 88
> > email: oset at ific.uv.es
> >
> > _______________________________________________
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> > Iac_hadron_2015 at jlab.org
> > https://mailman.jlab.org/mailman/listinfo/iac_hadron_2015
>
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-- 
Alberto Corrêa dos Reis
Centro Brasileiro de Pesquisas Físicas - CBPF
Rua Dr. Xavier Sigaud, 150 - Rio de Janeiro, RJ - Brazil
22290-180
+5521 2141 7378
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