| 1. |
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Effective field theories in nuclear particle and atomic physics
- 2005
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Proceedings (redaktörskap) (refereegranskat)abstract
- These are the proceedings of the workshop on ``Effective Field Theories in Nuclear, Particle and Atomic Physics'' held at the Physikzentrum Bad Honnef of the Deutsche Physikalische Gesellschaft, Bad Honnef, Germany from December 13 to 17, 2005. The workshop concentrated on Effective Field Theory in many contexts. A first part was concerned with Chiral Perturbation Theory in its various settings and explored strongly its use in relation with lattice QCD. The second part consisted of progress in effective field theories in systems with one, two or more nucleons as well as atomic physics. Included are a short contribution per talk.
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| 2. |
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Effective field theories in QCD
- 2002
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Proceedings (redaktörskap) (refereegranskat)abstract
- These are the proceedings of the workshop on ``Effective Field Theories of QCD'' held at the Physikzentrum Bad Honnef of the Deutsche Physikalische Gesellschaft, Bad Honnef, Germany from November 26 to 30, 2001. The workshop concentrated on Chiral Perturbation Theory in its various settings, its relations with lattice QCD and dispersion theory and the use of effective field theories in systems with one, two or more nucleons as well as at high baryon densities. Included are a short contribution per talk and a listing of some review papers on the subject.
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| 3. |
- Kupsc, Andrzej, et al.
(författare)
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Tests of the fundamental symmetries in η meson decays
- 2011
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Ingår i: Journal of Physics: Conference Series. ; 335
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Tidskriftsartikel (refereegranskat)abstract
- Patterns of chiral symmetry violation and tests of the conservation of the fundamental C , P and CP symmetries are key physics issues in studies of the Ï€ 0 , η and η’ meson decays. These tests include searches for rare or forbidden decays and searches for asymmetries among the decay products in the not-so-rare decays. Some examples for the rare decays are η → 2 Ï€ , η → 4 Ï€ 0 ( CP tests), decays into an odd number of photons ( e.g. , η → 3 γ ) and the decay η → Ï€ 0 e + e − ( C tests). In the conversion decay η → Ï€ + Ï€ − e + e − , the asymmetry in the distribution of the angle between the two-pion and two-lepton decay planes allows to search for CP violation in a flavor-conserving process beyond the CKM mechanism which is not constrained by the limits on the neutron dipole moment. In addition, the Dalitz decays and the decays into a lepton-antilepton pair are sensitive to contributions from a vector boson responsible for the annihilation of hypothetical light dark matter particles. The muon g – 2 and the branching ratio for the Ï€ 0 e + e − decay are currently the observables where hints of a deviation from the Standard Model predictions are reported. The experimental studies of the Ï€ 0 , η and η’ meson decays are carried out at four European accelerator research facilities: KLOE/KLOE-2 at DAFNE (Frascati), Crystal Ball at MAMI (Mainz), WASA at COSY (JÃŒlich), Crystal Barrel at ELSA (Bonn).
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