13–17 sept. 2021
São José dos Campos, Brazil
Fuseau horaire America/Sao_Paulo

Efimov signatures of the K(1460) resonance

13 sept. 2021, 16:03
1m
São José dos Campos, Brazil

São José dos Campos, Brazil

Instituto Tecnológico de Aeronáutica
Poster Poster

Orateur

Prof. Renato Higa (Instituto de Fisica, Universidade de Sao Paulo)

Description

The Efimov effect is a counterintuitive phenomenon concerning three non-relativistic particles with pairwise interactions supporting only one very shallow, two-particle bound state. In the so-called unitary limit, where the two-particle bound state energy goes to zero, the three-particle spectrum exhibits an infinite tower of bound states geometrically separated by a constant factor $\sim 515$. Efimov physics deals not only with the strict unitary regime, but also with the richer phenomenology slightly away from it, as long as the two-particle energies can still be considered shallow.

Observations of Efimov physics appear in cold atom experiments where the two-atom interactions can be tuned at will around the unitary regime via Feshbach resonance. In hadron physics, there are attempts at investigating some heavy exotic mesons as two- and three-body molecules and looking for universal correlations that are signatures of the Efimov effect. In this work we move away from the heavy quark sector, investigating a system with two kaons and one anti-kaon. The motivation is the shallow energies of the $a_0$ ($\sim 12$ MeV) and $f_0$ ($\sim 2$ MeV) below the two-kaon threshold. We present results for observables and evidence of universal correlations in the $K-f_0$ and $K-a_0$ scattering and the K(1460) state as candidate of an Efimov state.

Auteur principal

Prof. Renato Higa (Instituto de Fisica, Universidade de Sao Paulo)

Co-auteur

M. Rafael Fernandes Luiz (Instituto de Fisica, Universidade de Sao Paulo)

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