منابع مشابه
Dynamically generated mesons and chiral restoration
Spontaneous chiral symmetry breaking and its restoration in a QCD medium is one of the most interesting aspects of non-perturbative QCD [1]. One clear sign that chiral symmetry is broken in the QCD vacuum comes from a comparison of the spectra of two quark currents related by a chiral transformation, namely the isovector–vector and isovector–axial-vector current. If the vacuum obeyed chiral sym...
متن کاملLow lying axial - vector mesons as dynamically generated resonances
We make a theoretical study of the s-wave interaction of the nonet of vector mesons with the octet of pseudoscalar mesons starting from the Weinberg-Tomozawa Lagrangian and implementing unitarity in coupled channels. By looking for poles in the unphysical Riemann sheets of the unitarized scattering amplitudes, we get two octets and one singlet of axial-vector dynamically generated resonances. T...
متن کاملDynamically generated resonances from the interaction of vector mesons with baryons
We present the results of the first calculations involving the interaction of vector mesons with baryons, by means of which one generates a large amount of dynamically generated resonances, many of which can be associated to known resonances, while others represent predictions for new states.
متن کاملBaryonic resonances dynamically generated from the interaction of vector mesons with stable baryons of the decuplet
Using the hidden gauge approach for the interaction of vector mesons we evaluate the interaction of vector mesons of the octet of the ρ with the baryons of the ∆ decuplet. Scattering amplitudes are calculated, developing poles for some quantum numbers which we associate to baryonic resonances. Many of these states can be associated to known resonances, while others represent predictions for new...
متن کاملDynamically generated resonances
In this talk I report on recent work related to the dynamical generation of baryonic resonances, some made up from pseudoscalar meson-baryon, others from vector meson-baryon and a third type from two meson-one baryon systems. We can establish a correspondence with known baryonic resonances, reinforcing conclusions previously drawn and bringing new light on the nature of some baryonic resonances...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 2007
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2007.01.050