Light scalar mesons in 2+1 flavor full QCD
Terrence Draper, Takumi Doi, Keh-Fei Liu, Devdatta Mankame, Nilmani, Mathur, Xiangfei Meng
TL;DR
This study investigates light scalar mesons using 2+1 flavor full QCD, focusing on excited states and the influence of dynamical quarks, to clarify the nature of scalar mesons compared to previous quenched studies.
Contribution
It provides new insights into the scalar meson spectrum in full QCD, especially regarding the lowest $ar{q}q$ states and the effects of dynamical quarks.
Findings
Identification of excited states in scalar mesons
Comparison with quenched QCD results
Implications for the nature of a_0(1450) and a_0(980)
Abstract
We study the a_0 and K_0^* light scalar mesons in 2+1 flavor full QCD. Particular attention is paid to fitting excited states, with an eye toward determining whether scattering states are revealed. An ultimate goal will be to see how dynamical quarks affect the picture outlined with an earlier quenched study using overlap fermions, namely, that it is the a_0(1450), not the a_0(980), which is the lowest isovector scalar state.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · Black Holes and Theoretical Physics