Final-state interactions in the process

M. Röder; E. Borodina; H. Clement; E. Doroshkevich; R. Dzhygadlo; K. Ehrhardt; A. Erhardt; W. Eyrich; W. Gast; A. Gillitzer; D. Grzonka; J. Haidenbauer; C. Hanhart; F. Hauenstein; P. Klaja; L. Kober; K. Kilian; M. Krapp; M. Mertens; J. Ritman; E. Roderburg; W. Schroeder; T. Sefzick; A. Sibirtsev; P. Wintz; P. Wüstner

doi:10.1140/epja/i2013-13157-9

2022 Impact factor 2.7

Hadrons and Nuclei

Eur. Phys. J. A (2013) 49: 157
https://doi.org/10.1140/epja/i2013-13157-9

Regular Article - Experimental Physics

Final-state interactions in the process

The COSY-TOF Collaboration
M. Röder¹^,2^*, E. Borodina¹^,2, H. Clement⁶^,7, E. Doroshkevich⁶^,7, R. Dzhygadlo¹^,2, K. Ehrhardt⁶^,7, A. Erhardt⁶^,7, W. Eyrich⁵, W. Gast¹^,2, A. Gillitzer¹^,2, D. Grzonka¹^,2, J. Haidenbauer¹^,2^,3, C. Hanhart¹^,2^,3, F. Hauenstein¹^,2^,5, P. Klaja¹^,2^,5, L. Kober⁵, K. Kilian¹^,2, M. Krapp⁵, M. Mertens¹^,2, J. Ritman¹^,2, E. Roderburg¹^,2, W. Schroeder², T. Sefzick¹^,2, A. Sibirtsev⁸, P. Wintz¹^,2 and P. Wüstner²^,4

¹ Institut für Kernphysik, Forschungszentrum Jülich, 52428, Jülich, Germany
² Jülich Center for Hadron Physics, Forschungszentrum Jülich, 52428, Jülich, Germany
³ Institute for Advanced Simulation, Forschungszentrum Jülich, 52428, Jülich, Germany
⁴ Zentralinstitut für Elektronik, Forschungszentrum Jülich, 52428, Jülich, Germany
⁵ Friedrich-Alexander-Universität Erlangen-Nürnberg, 91058, Erlangen, Germany
⁶ Physikalisches Institut der Universität Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany
⁷ Kepler Center for Astro and Particle Physics, University of Tübingen, Auf der Morgenstelle 14, 72076, Tübingen, Germany
⁸ Helmholtz-Institut für Strahlen- und Kernphysik, Nussallee 14-16, 53115, Bonn, Germany

^* e-mail: m.roeder@fz-juelich.de

Received: 2 May 2013
Revised: 29 November 2013
Accepted: 6 December 2013
Published online: 24 December 2013

Abstract

The possibility to determine the pΛ scattering length from the final-state interaction in the reaction is investigated experimentally. From a transversely polarized measurement, the K ⁺ analyzing power (A _N) which, in principle, allows one to extract the spin triplet scattering length is studied. An unexpected energy dependence of the forward/backward symmetric part of A _N is found. The influence of N ^* resonances on the pΛ invariant mass spectrum is investigated by exploiting the large acceptance for the process and is found to be the main source of uncertainty for determining the pΛ scattering length.