Scalar mesons within a dynamical holographic QCD model

We show that the infrared dynamics of string modes dual to q q ¯ states within a Dynamical AdS/QCD model of coupled dilaton-gravity background gives the Regge-like spectrum of f 0 's scalars and higher spin mesons consistent with experimental data. The pion mass and its trajectory were also des...

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Bibliographic Details
Published in:Physics letters. B 2010-10, Vol.693 (3), p.287-291
Main Authors: de Paula, W., Frederico, T.
Format: Article
Language:English
Subjects:
Decay
Elementary particles
Exact sciences and technology
Gauge/string duality
Infrared
Mathematical models
Meson masses
Mesons
Nuclear physics
Physics
Scalars
Strings
The physics of elementary particles and fields
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Summary:We show that the infrared dynamics of string modes dual to q q ¯ states within a Dynamical AdS/QCD model of coupled dilaton-gravity background gives the Regge-like spectrum of f 0 's scalars and higher spin mesons consistent with experimental data. The pion mass and its trajectory were also described with a scale deformation of the metric and a rescaled string mass. The available experimental decay widths of the S → P P decays provided a complementary check of the proposed classification scheme for f 0 ( 980 ) , f 0 ( 1370 ) , f 0 ( 1500 ) and f 0 ( 1710 ) as radial excitations of f 0 ( 600 ) . For f 0 ( 980 ) we estimated a mixing angle of ± 20 o with other structures.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2010.08.045