June 29, 2015 to July 3, 2015
Pisa
Europe/Rome timezone

The K Cascade production in coupled channel chiral models up to next-to-leading order.

Jul 2, 2015, 5:10 PM
20m
Room PS4 (Building E, Polo Fibonacci, Pisa)

Room PS4

Building E, Polo Fibonacci, Pisa

Talk Hadron Structure and Meson-Baryon Interaction Working Group Parallel Session 6 - Hadron Structure & Meson-Baryon Interaction WG

Speaker

Albert Feijoo (University of Barcelona)

Description

The meson-baryon interaction in the S=-1 sector is studied by means of a chiral SU(3) Lagrangian up to next-to-leading order, implementing unitarization in coupled channels. The parameters of the Lagrangian have been fitted to a large set of experimental data in two-body channels. We focused on K- p --> K Cascade reactions because they show the strongest sensitivity to the next-to-leading order (NLO) coefficients, due to the zero tree level contribution of the leading-order terms. As we will see, the leading order Lagrangian, even taking into account the contributions via unitaritzation, can not build enough strength to reproduce the experimental data. Thus, NLO corrections are absolutely mandatory in the K Cascade production channels. In order to improve the the description of the total and differential K- p --> K Cascade cross sections, and to analyse the accuracy and stability of the obtained NLO parameters, phenomenological contributions of massive high spin resonances in K Cascade channels have been introduced and studied. The resulting K Cascade interaction has been also applied to study of the decay process $Lambda_b -> J/Psi K Xi, which can be studied by the LHCb Collaboration

Primary author

Albert Feijoo (University of Barcelona)

Co-authors

Prof. Volodymyr Magas (Universitat de Barcelona) Prof. Àngels Ramos (Universitat de Barcelona)

Presentation materials