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

Narrow S-wave resonance in pion-baryon system

Jun 30, 2015, 5:50 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 4 - Hadron Structure & Meson-Baryon Interaction WG

Speaker

Bingwei Long (Sichuan University, Chengdu)

Description

As the pion mass approaches a critical value m_pi^star, an S-wave baryon resonance can cross pion-baryon threshold, thus driving the scattering length to diverge. Charmed baryon resonance Lambda_c^+(2595) appears to be a realization of such a system. I explore the consequences of chiral symmetry for m_pi near m_pi^star, which are all centered around the finding that if m_pi^star is not too large, the effective range of such a system is unexpectedly large, proportional to 4pi f_pi^2/m_pi^3.

Primary author

Bingwei Long (Sichuan University, Chengdu)

Presentation materials