Erlangen 2026 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 38: Hadron Structure and Spectroscopy VIII
HK 38.1: Gruppenbericht
Donnerstag, 19. März 2026, 16:15–16:45, PHIL A 401
Studies of Λ(1405) photoproduction at BGOOD — •Antonio Joao Clara Figueiredo for the BGOOD collaboration — Physikalisches Institut, Universität Bonn
The Λ(1405) has long been considered a prime candidate for an unconventional hadronic state, with strong evidence supporting a dynamically generated meson-baryon molecular structure. To clarify the nature of the Λ(1405), precise measurements of its line shape and differential production cross sections are essential.
The BGOOD experiment at the ELSA facility provides an ideal environment for the investigation of Λ(1405) photoproduction at low momentum transfer. BGOOD combines a central electromagnetic calorimeter for neutral meson reconstruction with a forward magnetic spectrometer for charged particle identification, enabling access to very low momentum transfer kinematics which may be sensitive to molecular production mechanisms.
I will report on the current status of the Λ(1405) investigation at BGOOD in the photoproduction reaction γ p → K+ Λ(1405). Measurements of line shapes and differential cross sections will be presented, with particular emphasis on the Σ0 π0 decay channel and ongoing studies of the predicted two-pole structure of the Λ(1405).
Keywords: BGOOD; Photoproduction; Hyperon