VALENCIA, Julio 2014. Pedro González THE THREE QUARK FRENCH CONNECTION.

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Presentation transcript:

VALENCIA, Julio 2014

Pedro González THE THREE QUARK FRENCH CONNECTION

Inversion Problem in Baryon Spectroscopy In quark models based on reasonable two-quark interactions (OGE, OBE) the first excited state of negative parity lies in general below the first excitation of positive parity. Is it possible to implement an effective quark interaction to solve this problem?

BCN two-quark InteractionBertrand’s three-quark Interaction

What may be representing this effective potential? The effect of genuine three-quark forces (two sigma exchange) A way to take into account other corrections (relativistic, chiral, meson-baryon components…)

In order to really check the validity of a quark model to explain the baryon structure one has to go beyond the description of the spectral masses and consider transition processes. EEM3P0

STRONG PION DECAY WIDTHS Conclusion: Meson-baryon components implemented through the 3P0 model play a very relevant role in the description of the first positive parity excitations. Roper resonances have significant 3q as well as meson-baryon components. EEM3P0 EXP

VALENCIA, Julio 2014