13th APCTP - BLTP JINR Joint Workshop "Modern Problems in Nuclear and Elementary Particle Physics"

The Isoscalar Mesons and Exotic States in Light Front Holographic QCD

15 Jul 2019, 12:30

30m

International Conference Hall, Dubna, Russia

Modern problems in nuclear and elementary particle physics

Speaker

Dr Liping Zou (Institute of Modern Physics, CAS)

Description

In this talk a quantitative analysis of the isoscalar bosonic states will be shown in the framework of supersymmetric light front holographic QCD. The spectroscopy of the $\eta$ and $h$ mesons can be well described if one additional mass parameter -- which corresponds to the hard breaking of chiral $U(1)$ symmetry in standard QCD -- is introduced. The mass difference of the $\eta$ and ${\eta }^{\prime }$ isoscalar mesons is then determined by the strange quark mass content of the ${\eta }^{\prime }$. The theory also predicts the existence of isoscalar tetraquarks which are bound states of diquarks and anti-diquarks. The candidates for these exotic isoscalar tetraquarks are identified. In particular, the $f_0(1500)$ is identified as isoscalar tetraquark; the predicted mass value 1.52 GeV agrees with the measured experimental value within the model uncertainties.

Presentation materials

Slides

light_isoscalars-Liping_Zou.pptx