Chiral Unitary Dynamics of Hadrons and Hadrons in a Nuclear Medium

Abstract

In this talk I summarize recent findings around the description of axial vector mesons as dynamically generated states from the interaction of pseudoscalar mesons and vector mesons, dedicating some attention to the two $K_1(1270)$ states. Then I review the generation of open and hidden charm scalar and axial states, and how some recent experiment supports the existence of the new hidden charm scalar state predicted. I present recent results showing that the low lying $1/2^{+}$ baryon resonances for S=-1 can be obtained as bound states or resonances of two mesons and one baryon in coupled channels. Then show the differences with the S=0 case, where the $N^{\ast }(1710)$ appears also dynamically generated from the two pion one nucleon system, but the $N^{\ast }(1440)$ does not appear, indicating a more complex structure of the Roper resonance. Finally I shall show how the state X(2175), recently discovered at BABAR and BES, appears naturally as a resonance of the $\varphi K\bar{K}$ system.

Lectures delivered at the Fourth DAE-BRNS workshop on Hadron Physics, Aligarh, India, Feb. 2008

References in corpus (40)

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• Non perturbative chiral approach to s-wave \bar{K}N interactions
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• Meson-Meson interaction in a non-perturbative chiral approach
• N/D Description of Two Meson Amplitudes and Chiral Symmetry
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• Dynamically Generated Open and Hidden Charm Meson Systems
• Dynamically generated 0^+ heavy mesons in a heavy chiral unitary approach
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• Chiral unitary approach to S-wave meson baryon scattering in the strangeness S=0 sector
• Low lying axial-vector mesons as dynamically generated resonances
• On meson resonances and chiral symmetry
• What is the structure of the Roper resonance?
• Quark mass dependence of s-wave baryon resonances
• Coupled-channel study of crypto-exotic baryons with charm
• On baryon resonances and chiral symmetry
• Dynamically generated 1^+ heavy mesons
• Search for new charmonium states in the processes e+ e- --> J/psi D(*) D(*) at sqrt{s} ~ 10.6 GeV
• Open-charm meson resonances with negative strangeness
• Baryonic Resonances from Baryon Decuplet-Meson Octet Interaction
• Axial Resonances in the Open and Hidden Charm Sectors
• D Mesons in Nuclear Matter: A DN Coupled-Channel Equations Approach
• A Structure at 2175 MeV in $e^{+}{e}^{-}\to \varphi f_0(980)$ Observed via Initial-State Radiation
• On the Strangeness -1 S-wave Meson-Baryon Scattering
• X(2175) as a resonant state of the $\varphi K\bar{K}$ system
• Observation of Y(2175) in $J/\psi \to \eta \varphi f_0(980)$
• The $e^{+}{e}^{-}\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$, $K^{+}{K}^{-}{\pi }^0{\pi }^0$ and $K^{+}{K}^{-}{K}^{+}{K}^{-}$ Cross Sections Measured with Initial-State Radiation
• Three body resonances in two meson-one baryon systems
• Clues for the existence of two $K_1(1270)$ resonances
• The $N^{\ast }(1710)$ as a resonance in the $\pi \pi N$ system
• SU(6) Extension of the Weinberg-Tomozawa Meson-Baryon Lagrangian
• Hidden charm dynamically generated resonances and the $e^{+}{e}^{-}\to J/\psi D\bar{D}$, $J/\psi D{\bar{D}}^{\ast }$ reactions
• Three-body hadronic structure of low-lying $1/2^{+}$ $\Sigma$ and $\Lambda$ resonances

Cited by in corpus (6)

• The ρρinteraction in the hidden gauge formalism and the f_0(1370) and f_2(1270) resonances
• Dynamical generation and dynamical reconstruction
• Study the molecular nature of $\sigma$, $f_0(980)$, and $a_0(980)$ states
• A study of $\eta K\bar{K}$ and ${\eta }^{\prime }K\bar{K}$ with the fixed center approximation to Faddeev equations
• Study of the resonance contributions in the ${\Xi }_b^{-}\to p{K}^{-}{K}^{-}$ decay
• Study $B_{(s)}^0$ decays into $\varphi$ and a scalar or vector meson