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SUMMARY:The two-pole nature of the Lambda(1405) from lattice QCD - John Bu
 lava (Ruhr U.\, Bochum)
DTSTART:20250228T160000Z
DTEND:20250228T170000Z
UID:TALK227512@talks.cam.ac.uk
CONTACT:Terry Generet
DESCRIPTION:Although experimentally well-established\, the nature of the L
 ambda(1405) hyperon resonance has long been a mystery. Constituent quark m
 odels have difficulty accommodating its low mass\, while approaches based 
 on chiral effective theory typically predict an additional state\, the Lam
 bda(1380)\, which is broad and difficult to identify. I will present the f
 irst lattice QCD computation of the coupled-channel πΣ − K̅N scatteri
 ng amplitude in the Lambda(1405) channel\, which employs quark masses so t
 hat the πΣ threshold is approximately 1380 MeV. This enables the unambig
 uous identification of the Lambda(1380) in addition to the Lambda(1405)\, 
 thus supporting the exotic meson-baryon `molecule' interpretation.  
LOCATION:MR19 (Potter Room\, Pavilion B)\, CMS
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