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HK: Fachverband Physik der Hadronen und Kerne
HK 4: Hadron Structure and Spectroscopy I
HK 4.3: Vortrag
Montag, 30. August 2021, 17:15–17:30, H3
a0 photoproduction at the BGOOD experiment — •Adrian Sonnenschein for the BGOOD collaboration — Physikalisches Institut, Nussallee 12, D-53115 Bonn
In recent years hadron spectroscopy has experienced a renaissance due to the discovery of tetra- and pentaquark systems including c and b quarks. Similar structures are expected similar structures are expected in the sector of light u,d,s quarks. The BGOOD experiment at the ELSA electron accelerator facility is studying this through the photoproduction of mesons close to production threshold. Recent results suggestthat the KK threshold is of particular interest.
This is where the isovector meson resonances a0(980) is located, slightly below the KK threshold. Photoproduction of a π0η pair off a proton γ p → π0η p is a favourable reaction channel to study the a0p threshold, since a0(980) has a dominant π0η decay mode.
This talk presents the measurement of the π0η mass distribution and the determination of differential cross sections.
*Supported by DFG projects 388979758/405882627 and the European Unions’s Horizont 2020 programm, grant 824093.