Benutzungsdienste in Bibliotheken

Hilpert, Wilhelm; Gillitzer, Bertold; Kuttner, Sven; Schwarz, Stephan

doi:10.1515/9783110301441

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“…with an intermediate nucleon resonance excited similar as equation (97). In their experiment the mass of the bound state and its width is not measured by the energy of the emerging nucleon in step (98) or (99), but from the decay of such a tentative state into particles number…”

Section: Pion-nucleon Back To Back Experimentsmentioning

confidence: 99%

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Search for quasi boundηmesons

Machner

2015

J. Phys. G: Nucl. Part. Phys.

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The search for a quasi bound η meson in atomic nuclei is reviewed. This tentative state is studied theoretically as well as experimentally. The theory starts from elastic η nucleon scattering which is derived from production data within some models. From this interaction the η nucleus interaction is derived. Model calculations predict binding energies and widths of the quasi bound state. Another method is to derive the η nucleus interaction from excitation functions of η production experiments. The s wave interaction is extracted from such data via final state interaction theorem. We give the derivation of s wave amplitudes in partial wave expansion and in helicity amplitudes and their relation to observables. Different experiments extracting the final state interaction are discussed as are production experiments. So far only three experiments give evidence for the existence of the quasi bound state: a pion double charge exchange experiment, an effective mass measurement, and a transfer reaction at recoil free kinematics with observation of the decay of the state.

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Section: Pion-nucleon Back To Back Experimentsmentioning

confidence: 99%

“…At this 0 MeV can be produced with a momentum transfer ⩽ q 30 MeV/c. So far no final result is published [98]. One nucleon transfer guarantees a rather large cross-section.…”

Section: R Pmentioning

confidence: 99%

Search for quasi boundηmesons

Machner

2015

J. Phys. G: Nucl. Part. Phys.

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Benutzungsdienste in Bibliotheken

Cited by 1 publication

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Search for quasi boundηmesons

Search for quasi boundηmesons

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