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16–21 Aug 2019
Guilin Bravo Hotel, Guilin, China
Asia/Shanghai timezone

Role of a four-quark and a glueball state in pion-pion and pion-nucleon scattering

Not scheduled
15m
Guilin Bravo Hotel, Guilin, China

Guilin Bravo Hotel, Guilin, China

14 South Ronghu Road, Xiangshan, Guilin 541002, Guangxi, China
Poster Posters

Speaker

Phillip Lakaschus (G)

Description

We consider the two-flavor version of the extended linear sigma model (eLSM), which contains (pseudo)scalar and (axial-)vector quark-antiquark mesons, a scalar glueball [predominantly corresponding to f0(1710)], as well as the nucleon and its chiral partner. We extend this model by the additional light scalar meson f0(500), predominantly a putative four-quark state. We investigate various interaction terms of the four-quark and glueball states with the other particles, some of which preserve and some of which explicitly break the U(1)A symmetry. We test our model by performing a global fit to masses and decay widths of the scalar resonances and pion-pion scattering lengths. We also discuss the influence of the scalar four-quark state and the glueball on the baryon sector by evaluating pion-nucleon scattering parameters. We find that the inclusion of f0(500) improves the description of pion-pion and pion-nucleon scattering lengths.

Primary authors

Dirk Rischke (Goethe University Frankfurt am Main) Prof. Francesco Giacosa (Institute of Physics, Jan Kochanowski University, PL-25406 Kielce, Poland) Mr Justin Mauldin (Institute for theoretical physics, Goethe University Frankfurt) Phillip Lakaschus (G)

Presentation materials

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