BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Photoproduction of mesons off quasifree nucleons and light nuclei
DTSTART;VALUE=DATE-TIME:20190624T150500Z
DTEND;VALUE=DATE-TIME:20190624T153000Z
DTSTAMP;VALUE=DATE-TIME:20260804T034706Z
UID:indico-contribution-95@indico.koza.if.uj.edu.pl
DESCRIPTION:Speakers: Bernd Krusche (University of Basel)\nPhotoproduction
  of mesons off nuclei is important for several different topics. Reactions
  with free and quasifree nucleons (mainly protons and neutrons bound in th
 e deuteron) have given much new input for the investigation of the excitat
 ion spectrum of the nucleon. For this\, experimentally mainly the explorat
 ion of several polarization observables (circularly and linearly polarized
  beams\, longitudinally and transversally polarized beams)\, in addition t
 o differential cross sections\, is important. Also the measurement of reac
 tions with mesons pairs in the final state (in particular $\\pi\\pi$ and $
 \\pi\\eta$) has opened new windows to the nuclear excitation spectrum beca
 use such reactions are sensitive to higher lying states with a more compli
 cated excitation structure which tend to de-excite in sequential decays vi
 a intermediate excited states. During the last few years techniques have b
 een developed to study such reactions also for quasifree neutrons bound in
  light nuclei\, which is necessary to disentagle the isospin structure of 
 the electromagnetic excitations. In the meantime\, even double-polarizatio
 n observables for the production of neutral meson pairs off quasifree neut
 rons are experimentally accessible.\n\nFurthermore\, photoproduction of me
 sons off nuclei is also a very valuable testing field for meson-nucleon in
 teractions and the production of exotic hadronic states. The nature of the
  narrow states observed for the production of eta mesons from light nuclei
  are still not understood and controverselly discussed. Also the possible 
 manifestation of di-baryonic states in coherent double $\\pi^0$ production
  off the deuteron is under discussion. Recently\, also several new data se
 ts for photoproduction of mixed-charged pion pairs were collected\, which 
 are sensitive to the contribution of the $\\rho$-meson to photoproduction 
 in the second resonance region\, which is very important for the strong su
 ppression of the second resonance peak for nuclear targets which is assume
 d to be a nuclear in-medium effect. We will give a summary of recent resul
 ts.\n\nhttps://indico.koza.if.uj.edu.pl/event/1/contributions/95/
LOCATION:Collegium Maius
URL:https://indico.koza.if.uj.edu.pl/event/1/contributions/95/
END:VEVENT
END:VCALENDAR