N-pi Decays of Baryons in a Relativized Model

N-pi Decays of Baryons in a Relativized Model

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Publisher:

Published: 1992

Total Pages: 1994

ISBN-13:

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We calculate teh N pi decay amplitudes of baryon resonances ina semi-relativistic version of the 3P0 model of hadron decays. We use relativized wave functions for the baryons and mesons, and include an intuitive modification of the usual 3P0 model. Our results are in reasonable agreement with the reported amplitudes for all known non-strange resonances, and confirm a proposed solution to the mystery of the 'missing' states.


Quasi Two-body Decays of Nonstrange Baryons

Quasi Two-body Decays of Nonstrange Baryons

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Published: 1993

Total Pages: 17

ISBN-13:

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We examine the decays of nonstrange baryons to the final states Delta Pi, NRho, NEta, NEta', Nw, N.5 (1440)Pi, and Delta 3/2+(1600)Pi, in a relativized pair-creation (^3Po) model which has been developed in a previous study of the NPi decays of the same baryon states. As it is our goal to provide a guide for the possible discovery of new baryon states at CEBAF and elsewhere, we examine the decays of resonances which have already been seen in the partial-wave analyses, along with those of states which are predicted by the quark model but which remain undiscovered. The level of agreement between our calculation and the available widths from the partial-wave analyses in encouraging.


Strange Decays of Nonstrange Baryons

Strange Decays of Nonstrange Baryons

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Published: 1998

Total Pages:

ISBN-13:

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The strong decays of excited nonstrange baryons into the final states [Lambda]K, [Sigma]K, and for the first time into [Lambda](1405)K, [Lambda](1520)K, [Sigma](1385)K, [Lambda]K{sup *}, and [Sigma]K{sup *}, are examined in a relativized quark pair creation model. The wave functions and parameters of the model are fixed by previous calculations of N[pi] and N[pi][pi], etc., decays. The results show that it should be possible to discover several new negative parity excited baryons and confirm the discovery of several others by analyzing these final states in kaon production experiments. They also establish clear predictions for the relative strengths of certain states to decay to [Lambda](1405)K and [Lambda](1520)K, which can be tested to determine if a three-quark model of the [Lambda](1405)K is valid. The authors results compare favorably with the results of partial wave analyses of the limited existing data for the [Lambda]K and [Sigma]K channels. They do not find large [Sigma]K decay amplitudes for a substantial group of predicted and weakly established negative-parity states, in contrast to the only previous work to consider decays of these states into the strange final states [Lambda]K and [Sigma]K.


New Baryons in the [Delta][eta] and [Delta][omega] Channels

New Baryons in the [Delta][eta] and [Delta][omega] Channels

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Published: 1998

Total Pages:

ISBN-13:

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The decays of excited nonstrange baryons into the final states [Delta][eta] and [Delta][omega] are examined in a relativized quark pair creation model. The wavefunctions and parameters of the model are fixed by previous calculations of N[pi] and N[pi][pi], etc., decays through various quasi-two body channels including N[eta] and N[omega]. The results show that the combination of thresholds just below the region of interest and the isospin selectivity of these channels should allow the discovery of several new baryons in such experiments.


Baryons '95 - Proceedings Of The 7th International Conference On The Structure Of Baryons

Baryons '95 - Proceedings Of The 7th International Conference On The Structure Of Baryons

Author: Benjamin F Gibson

Publisher: World Scientific

Published: 1996-09-20

Total Pages: 614

ISBN-13: 9814547670

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The conference focused on the current status of baryon spectroscopy, form factors and structure functions, electroweak interactions and symmetries, strange and exotic states, chiral perturbation theory, heavy quark physics, and medium modifications, through plenary session summaries and reviews and parallel session reports of recent experimental and theoretical advances. Plans for future facilities and upgrades were highlighted in special plenary sessions.


Hadron Spectroscopy And Structure - Proceedings Of The Xviii International Conference

Hadron Spectroscopy And Structure - Proceedings Of The Xviii International Conference

Author: Feng-kun Guo

Publisher: World Scientific

Published: 2020-07-28

Total Pages: 800

ISBN-13: 981121932X

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This is the conference proceedings for the 18th International Conference on Hadron Spectroscopy and Structure (HADRON2019), held in Guilin, China. It is among the most important conference series in the field of hadron spectroscopy and structure. Collecting more than 130 contributions from this conference, the book spans over the topics of meson and baryon spectroscopy, exotic hadrons, hadron production and interactions, analysis tools, QCD and hadron structure, hadrons in nuclear environment and hypernuclei. Summaries of the recent discoveries from Belle, BESIII, LHCb and other high-energy experiments, as well as recent theoretical developments in the above mentioned topics, are contained in this volume, rendering it as a valuable resource for researchers working on hadron spectroscopy and structure.