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Title: Bayesian analysis for kaon photoproduction

Abstract

We have investigated contribution of the nucleon resonances in the kaon photoproduction process by using an established statistical decision making method, i.e. the Bayesian method. This method does not only evaluate the model over its entire parameter space, but also takes the prior information and experimental data into account. The result indicates that certain resonances have larger probabilities to contribute to the process.

Authors:
;  [1]
  1. Department Fisika, FMIPA, Universitas Indonesia, Depok 16424 (Indonesia)
Publication Date:
OSTI Identifier:
22307915
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1617; Journal Issue: 1; Conference: ICTAP 2013: 3. international conference on theoretical and applied physics, Malang, East Java (Indonesia), 10-11 Oct 2013; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; KAONS; NUCLEONS; NUMERICAL ANALYSIS; PHOTOPRODUCTION; PROBABILITY; RESONANCE PARTICLES

Citation Formats

Marsainy, T., E-mail: tmart@fisika.ui.ac.id, and Mart, T., E-mail: tmart@fisika.ui.ac.id. Bayesian analysis for kaon photoproduction. United States: N. p., 2014. Web. doi:10.1063/1.4897110.
Marsainy, T., E-mail: tmart@fisika.ui.ac.id, & Mart, T., E-mail: tmart@fisika.ui.ac.id. Bayesian analysis for kaon photoproduction. United States. doi:10.1063/1.4897110.
Marsainy, T., E-mail: tmart@fisika.ui.ac.id, and Mart, T., E-mail: tmart@fisika.ui.ac.id. Thu . "Bayesian analysis for kaon photoproduction". United States. doi:10.1063/1.4897110.
@article{osti_22307915,
title = {Bayesian analysis for kaon photoproduction},
author = {Marsainy, T., E-mail: tmart@fisika.ui.ac.id and Mart, T., E-mail: tmart@fisika.ui.ac.id},
abstractNote = {We have investigated contribution of the nucleon resonances in the kaon photoproduction process by using an established statistical decision making method, i.e. the Bayesian method. This method does not only evaluate the model over its entire parameter space, but also takes the prior information and experimental data into account. The result indicates that certain resonances have larger probabilities to contribute to the process.},
doi = {10.1063/1.4897110},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1617,
place = {United States},
year = {Thu Sep 25 00:00:00 EDT 2014},
month = {Thu Sep 25 00:00:00 EDT 2014}
}
  • A crossing-consistent description is presented for {ital K}{sup +} photoproduction {ital p}({gamma},{ital K}{sup +}){Lambda} and {ital K}{sup {minus}} radiative capture {ital p}({ital K}{sup {minus}},{gamma}){Lambda} using an effective-chiral-Lagrangian model. Crossing requires that these reactions should both be described by the same physical model including identical dynamic parameters such as coupling constants. It is demonstrated that previous analyses of these crossing-related reactions, which have also used this effective-chiral-Lagrangian model, have not utilized the crossing constraint and thus do not simultaneously describe both kaon photoproduction and capture. New sets of coupling constants that consistently describe both reactions are presented.
  • The recent CLAS 2005, SAPHIR 2003, LEPS, and the old, pre-1972, data on K{sup +}{lambda} photoproduction are compared with theoretical calculations in the energy region of E{sub {gamma}}{sup lab}<2.6 GeV in order to learn about their mutual consistency. The isobaric models Kaon-Maid and Saclay-Lyon, along with new fits to the CLAS data, are utilized in this analysis. The SAPHIR 2003 data are shown to be coherently shifted down with respect to the CLAS, LEPS, and pre-1972 data, especially at forward kaon angles. The CLAS, LEPS, and pre-1972 data in the forward hemisphere can be described satisfactorily by using the isobaricmore » model without hadronic form factors. The inclusion of the hadronic form factors yields a strong suppression of the cross sections at small kaon angles and c.m. energies larger than 1.9 GeV, which is not observed in the existing experimental data. We demonstrate that the discrepancy between the CLAS and SAPHIR data has a significant impact on the predicted values of the mass and width of the ''missing resonance'' D{sub 13}(1895) in the Kaon-Maid model.« less
  • Replying to a recent Comment by R. L. Workman, it is shown that our analysis (Phys. Rev. C 42, 108 (1990)) of the elementary kaon photoproduction reaction allows a meaningful determination of the relevant coupling constants.
  • Starting from an appropriate low energy model, we investigate the role played by spin-3/2 nucleonic resonances. A new model is obtained giving good agreement with data up to 2.1 GeV and satisfying SU(3) constraints on the main coupling constants. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.