K0SΣ0 photoproduction at the BGO-OD experiment

Katrin Kohl; Stefan Alef; Patrick Bauer; Reinhard Beck; Alessandro Braghieri; Philip Cole; Rachele Di Salvo; Daniel Elsner; Alessia Fantini; Oliver Freyermuth; Francesco Oliver; Anatoly Gridnev; Daniel Hammann; Jürgen Hannappel; Thomas Jude; Nikolay Kozlenko; Alexander Lapik; Paolo Levi Sandri; Valery Lisin; Giuseppe Mandaglio; Roberto Messi; Dario Moricciani; Vladimir Nedorezov; Dmitry Novinsky; Paolo Pedroni; Andrei Polonski; Björn-Eric Reitz; Mariia Romaniuk; Georg Scheluchin; Hartmut Schmieden; Victorin Sumachev; Viacheslav Tarakanov; Christian Tillmanns

doi:10.1051/epjconf/202024101009

Proceedings

Open Access

EPJ Web of Conferences 241, 01009 (2020)
https://doi.org/10.1051/epjconf/202024101009

K⁰_SΣ⁰ photoproduction at the BGO-OD experiment

Katrin Kohl¹^*, Stefan Alef¹, Patrick Bauer¹, Reinhard Beck², Alessandro Braghieri¹³, Philip Cole³, Rachele Di Salvo⁴, Daniel Elsner¹, Alessia Fantini⁴^,5, Oliver Freyermuth¹, Francesco Oliver⁶^,7, Anatoly Gridnev⁸, Daniel Hammann¹, Jürgen Hannappel¹, Thomas Jude¹, Nikolay Kozlenko⁸, Alexander Lapik⁹, Paolo Levi Sandri¹⁰, Valery Lisin⁹, Giuseppe Mandaglio¹¹^,12, Roberto Messi⁴^,5, Dario Moricciani⁴, Vladimir Nedorezov⁹, Dmitry Novinsky⁸, Paolo Pedroni¹³, Andrei Polonski⁹, Björn-Eric Reitz¹, Mariia Romaniuk⁴, Georg Scheluchin¹, Hartmut Schmieden¹, Victorin Sumachev⁸, Viacheslav Tarakanov⁸ and Christian Tillmanns¹

¹ Rheinische Friedrich-Willhelms-Universität Bonn, Physikalisches Institut, Nußallee 12, 53115 Bonn Germany
² Helmholtz-Institut fuer Strahlen- und Kernphysik, Universitaet Bonn, Nussallee 1-16, D-53115 Bonn Germany
³ Lamar University, Department of Physics, Beaumont, Texas, 77710 USA
⁴ INFN Roma Tor Vergata, Rome, Italy
⁵ Università di Roma "Tor Vergata", Via della Ricerca Scientifica 1, 00133 Rome, Italy
⁶ INFN sezione di Roma La Sapienza, P.le Aldo Moro 2, 00185 Rome, Italy
⁷ Istituto Superiore di Sanita, Viale Regina Elena 299, 00161 Rome, Italy
⁸ Petersburg Nuclear Physics Institute, Gatchina, Leningrad District, 188300 Russia
⁹ Russian Academy of Sciences Institute for Nuclear Research, prospekt 60-letiya Oktyabrya 7a, Moscow, 117312 Russia
¹⁰ INFN - Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044 Frascati, Italy
¹¹ INFN sezione Catania, 95129 Catania, Italy
¹² Universita degli Studi di Messina, Via Consolato del Mare 41, 98121 Messina, Italy
¹³ INFN sezione di Pavia, Via Agostino Bassi, 6 - 27100 Pavia, Italy

^* Corresponding author: kohl@physik.uni-bonn.de

Published online: 22 September 2020

Abstract

The BGO-OD experiment at the ELSA accelerator facility uses an energy tagged bremsstrahlung photon beam to investigate the excitation structure of the nucleon via meson photoproduction.

The setup with a BGO calorimeter surrounding the target and an open dipole spectrometer covering the for ward region is ideally suited for investigating low momentum transfer processes, in particular in strangeness photoproduction.

The associated photoproduction of K⁰_S and hyperons is essential to understand the role of K^* exchange mech anisms. A cusp-like structure observed in the yp → K⁰_SΣ⁺ reaction at the K^* threshold is described by models including dynamically generated resonances from vector meson-baryon interactions. Such interactions are pre dicted to give a peak like structure in K⁰_SΣ⁰ photoproduction off the neutron. A very preliminary cross section is determined and compared to the prediction, the results appear to support the model

© The Authors, published by EDP Sciences, 2020

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