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seminars on Quark Condensate
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Subject: seminars on Quark Condensate
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From: GIORGIO CAPON - TEL 00-39-06-94032893 <Giorgio.Capon@lnf.infn.it>
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Date: Thu, 22 Jun 2000 10:16:22 +0200
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CC: CAPON@lnf.infn.it
FRASCATI GENERAL SEMINAR
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OGGI/TODAY June 22 - at 14.30 - Auditorio Bruno Touschek
(note that we start 30' before than usual)
M. KNECHT - Marseille Univ.
S. PISLAK - Yale Univ.
G. COLANGELO - Zurich Univ.
N. GRION - Sez. INFN, Trieste
A. LANARO - INFN, LNF
QUARK CONDENSATE AFTERNOON
Abstract:
The quark condensate <0|qbar q|0> represents the most natural order
parameter of chiral symmetry breaking, whence the push, in order to
measure it. This parameter characterises the realisation of QCD at low
energy, which is presently not yet strictly determined, providing a
handle to understand the way chiral symmetry is broken.
The quark condensate can be determined through a measurement of
pion pion scattering lengths.
There are different ways to access experimentally the
pion pion -> pion pion scattering amplitude near threshold:
1) the decay kaon -> pion pion electron neutrino, i.e. the so-called
Ke4 decay;
2) the pionic atom (pionium);
3) the pion production reaction in nuclear matter
pion nucleus -> pion pion nucleus'.
Theoretical and experimental results and prospects, along the three
lines above, will be discussed, with talks by members of EURODAPHNE
Collaboration (theory), E865 Collaboration at BNL, DIRAC Collaboration
at CERN, Chaos Collaboration at TRIUMF.
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The full seminars program may be consulted on the Web page :
http://wwwsis.lnf.infn.it/seminars/sem_calendar.html