Conveners
Session III: Low Energy QCD
- Gilberto Colangelo (Bern Univ.)
Session III: Low Energy QCD
- Juerg Gasser (Bern Univ.)
Prof.
Juerg Gasser
(Berna University)
5/22/07, 5:20 PM
Low energy QCD
Data on hadronic reactions have become so precise by now that one
has to take into account radiative corrections as completely as
possible. My talk will concentrate on this issue from a
theoretical point of view, for K->3 pi and K_e4 decays.
Dr
Evgueni Goudzovski
(Scuola Normale Superiore and INFN, Pisa)
5/22/07, 5:50 PM
Low energy QCD
The NA48/2 experiment at the CERN SPS has collected an
unprecedented sample of 3-pion decays of charged kaons. The high
statistics and the good resolution of the detectors
allow a unique investigation of the detailed phase space
distributions of these decays. The effects of final state pion
rescattering observed in the Dalitz plot distribution of the K+-
into pi+- pi0 pi0 decays turned...
Mrs
Brigitte BLOCH-DEVAUX
(DAPNIA/SPP CEA-SACLAY ( FRANCE))
5/22/07, 6:10 PM
Low energy QCD
The NA48/2 experiment at the CERN SPS has collected about 10**6
K± decays
into pi+ pi- e± ν (Ke4) in 2003 and 2004. The analysis of a
partial sample of
~500000 such events allows a precise measurement of the decay
parameters.
The form factors of the reaction and their dependence with dipion
and dilepton
masses have been measured. Thanks to a sizeable acceptance at
large Mpipi...
Prof.
Ludwig Tauscher
(Basel University)
5/22/07, 6:30 PM
Low energy QCD
DIRAC aims at measuring the scattering length |a0-a2| through the
lifetime of the
pi+pi- atom in its 1S state. The published result (Physics
Letters B 619 (2005))
used only part of the totally collected statistics. An update of the
result concerning the statistical accuracy will be presented.
Michael Cargnelli
(Austrian Academy of Sciences - Stefan Meyer Institute)
5/22/07, 6:50 PM
Low energy QCD
At the DAFNE electron-positron collider of Laboratori Nazionali
di Frascati we study kaonic atoms, taking advantage of the
low-energy kaons produced in the phi-meson decay. The
kaon-nucleon interaction at rest in kaonic hydrogen and kaonic
deuterium can be investigated under favorable conditions.
The DEAR (DAFNE Exotic Atom Research) experiment at LNF delivered
the most precise data on...
Prof.
Gilberto Colangelo
(Berna University)
5/23/07, 9:00 AM
Low energy QCD
Prof.
Luigi Di Lella
(Scuola Normale Superiore di Pisa)
5/23/07, 9:30 AM
Low energy QCD
Over the last few years it has become possible to study low
energy ππ scattering in K decays to three pions, thanks to the
high statistics measurement of K±→ π±π°π° decay with excellent
π°π° invariant mass resolution performed by the NA48/2 experiment
at the CERN SPS. The information on the ππ scattering lengths
which can be extracted from these results is reviewed and
compared with the...
