منابع مشابه
Pion photoproduction in the delta resonance region
We have updated our multipole analyses to incorporate new data from the low-energy and delta resonance regions. We note a slight decrease in our estimate of the delta photo-decay amplitudes. This agrees with results found in Compton scattering. Our values are also in good agreement with a previous RPI determination. We have reexamined our determinations of the E2/M1 ratio at the resonance energ...
متن کاملParity-Violating Photoproduction of p6 on the D Resonance
Shi-Lin Zhu,1,2 C. M. Maekawa,1 B. R. Holstein,3 and M. J. Ramsey-Musolf 1,2,4 1Kellogg Radiation Laboratory 106-38, California Institute of Technology, Pasadena, California 91125 2Department of Physics, University of Connecticut, Storrs, Connecticut 06269 3Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003 4Theory Group, Thomas Jefferson National Accelerator Facil...
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QCD-based models predict many N* states that decay through modes that have yet to be measured or precisely identified. These decay mechanisms give insight into the underlying symmetries of the excited-baryon states. There are competing models for the quark symmetries and dynamics ranging from preferentially paired-quark distributions to hybrid gluonic excitations. Measurement of the differentia...
متن کاملNucleonic resonance effects in the φ meson photoproduction
The process γp → φp close to threshold is investigated focusing on the role played by the sand u-channel nucleonic resonances. For this purpose, a recent quark model approach, based on the SU(6) ⊗ O(3) symmetry with an effective Lagrangian, is extended to the φ meson photoproduction. Another non-diffractive process, the tchannel π0 exchange, is also included. The diffractive contribution is pro...
متن کاملMeson photoproduction in the first and second resonance region
The study of baryon resonances via meson photoproduction reactions on the free proton and on nucleons in the nuclear medium is discussed. Special emphasis is laid on the production of neutral mesons which due to the suppression of nonresonant backgrounds are particularly well suited for the study of excited states of the nucleon. Experiments carried out during the last ten years with the TAPSde...
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ژورنال
عنوان ژورنال: The European Physical Journal A
سال: 2015
ISSN: 1434-6001,1434-601X
DOI: 10.1140/epja/i2015-15111-3