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Study of Scalar Mesons and Related Radiative Decays

Study of Scalar Mesons and Related Radiative Decays
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Release: 2002
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After a brief review of the puzzling light scalar meson sector of QCD, a brief summary will be given of a paper concerning radiative decays involving the light scalars. There, a simple vector meson dominance model is constructed in an initial attempt to relate a large number of the radiative decays involving a putative scalar nonet to each other. As an application it is illustrated why a0(980)-f0(980) mixing is not expected to greatly alter the f0/a0 production ratio for radiative [phi] decays.

Radiative Decays Involving Light Scalar Mesons

Radiative Decays Involving Light Scalar Mesons
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Release: 2002
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We present a vector dominance model to describe radiative decays involving the light scalar mesons. Assuming that the light scalar mesons form a nonet this model gives relations among various decay amplitudes of the form S--> gamma gamma, V-->Sgamma and S--> Vgamma, where S and V denote scalar and vector mesons. By comparing with experimental radiative decay rates, including those recently measured for phi--> PP'gamma, we obtain various predictions. We discuss briefly ongoing extensions of the present work in an attempt to describe the radiative phi decay measurements in detail.

Vector Meson Dominance Model for Radiative Decays Involving Light Scalar Mesons

Vector Meson Dominance Model for Radiative Decays Involving Light Scalar Mesons
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Release: 2002
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We study a vector dominance model which predicts a fairly large number of currently interesting decay amplitudes of the types S ->??, V -> S? and S -> V?, where S and V denote scalar and vector mesons, in terms of three parameters. As an application we first use our approach to obtain the usual puzzling result?(? -> f0?)/?(? -> a0°?)H" 1 rather than the observed value of about 3. The model makes it easy to test in detail a recent proposal to solve this puzzle by including the isospin violating a0°-f0 mixing and we find that it seems successful.

Quark Confinement And The Hadron Spectrum V, Proceedings Of The 5th International Conference

Quark Confinement And The Hadron Spectrum V, Proceedings Of The 5th International Conference
Author: Nora Serafina Brambilla
Publisher: World Scientific
Total Pages: 551
Release: 2003-08-27
Genre: Science
ISBN: 9814485810
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This book provides an update on our understanding of strong interaction, with theoretical and experimental highlights included. It is divided into five sections. The first section is devoted to the investigations into and the latest results on the mechanism of quark confinement. The second and third sections focus respectively on light and heavy quarks (effective field theories, Schwinger-Dyson approach and lattice QCD results). The fourth section deals with the deconfinement mechanism and quark-gluon plasma formation signals. The last section presents highlights of experiments, new physics beyond QCD, and nonperturbative approaches in other theories (strings and SUSY) that may be useful in QCD.

Photoproduction and Decay of Light Mesons in CLAS.

Photoproduction and Decay of Light Mesons in CLAS.
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Total Pages: 67
Release: 2013
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We present preliminary experimental results on photoproduction and decay of light mesons measured with CLAS setup at JLAB . This include Dalitz decay of pseudoscalar and vector mesons, radiative decay of pseudoscalar mesons as well hadronic decays of pseudoscalar and vector mesons. The collected high statistics in some of decay channels exceeds the world data by an order of magnitude and some other decay modes are observed for the first time. It is shown how the CLAS data will improve the world data on transition form factors of light mesons, Dalitz plot analyses, branching ratios of rare decay modes and other fundamental properties potentially accessible through the light meson decays.

Radiative Decays Involving A0(980) and F0(980) in the Vector Meson Dominance Model

Radiative Decays Involving A0(980) and F0(980) in the Vector Meson Dominance Model
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Release: 2005
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We summarize some features of the vector meson dominance model which was recently proposed for studying radiative decays involving the scalar mesons. Using the experimental values of [Gamma](a[sub 0] [yields] [gamma][gamma]), [Gamma](f[sub 0] [yields] [gamma][gamma]) and [Gamma]([phi] [yields] a[sub 0] [gamma]) as inputs, we show that the model predicts a large hierarchy between [Gamma](a[sub 0] [yields] [omega][gamma]) and [Gamma](a[sub 0] [yields] [rho][gamma]) as well as between [Gamma](f[sub 0] [yields] [omega][gamma]) and [Gamma](f[sub 0] [yields] [rho][gamma]).