Measurement of the beam asymmetry Σ in πeta; production off the proton with the CBELSA/TAPS experiment⋆

E. Gutz; V. Sokhoyan; H. van Pee; A. V. Anisovich; J. C. S. Bacelar; B. Bantes; O. Bartholomy; D. Bayadilov; R. Beck; Y. A. Beloglazov; R. Castelijns; V. Credé; H. Dutz; A. Ehmanns; D. Elsner; K. Essig; R. Ewald; I. Fabry; K. Fornet-Ponse; M. Fuchs; Ch. Funke; R. Gothe; R. Gregor; A. B. Gridnev; St. Höffgen; P. Hoffmeister; I. Horn; I. Jägle; J. Junkersfeld; H. Kalinowsky; S. Kammer; V. Kleber; Friedrich Klein; Frank Klein; E. Klempt; M. Konrad; M. Kotulla; B. Krusche; M. Lang; J. Langheinrich; H. Löhner; I. V. Lopatin; J. Lotz; S. Lugert; D. Menze; T. Mertens; J. G. Messchendorp; V. Metag; C. Morales; M. Nanova; V. A. Nikonov; D. Novinsky; R. Novotny; M. Ostrick; L. Pant; M. Pfeiffer; A. Radkov; A. V. Sarantsev; S. Schadmand; Ch. Schmidt; H. Schmieden; B. Schoch; S. Shende; A. Süle; V. V. Sumachev; T. Szczepanek; U. Thoma; D. Trnka; D. Walther; Ch. Weinheimer; Ch. Wendel

doi:10.1140/epja/i2008-10566-9

2023 Impact factor 2.6

Hadrons and Nuclei

Eur. Phys. J. A (2008) 35: 291-293
https://doi.org/10.1140/epja/i2008-10566-9

Regular Article - Experimental Physics

Measurement of the beam asymmetry Σ in πeta; production off the proton with the CBELSA/TAPS experiment^⋆

The CBELSA/TAPS Collaboration
E. Gutz¹^*, V. Sokhoyan¹, H. van Pee¹, A. V. Anisovich¹^,3, J. C. S. Bacelar⁴, B. Bantes⁵, O. Bartholomy¹, D. Bayadilov¹^,3, R. Beck¹, Y. A. Beloglazov³, R. Castelijns⁴, V. Credé¹^,6, H. Dutz⁵, A. Ehmanns¹, D. Elsner⁵, K. Essig¹, R. Ewald⁵, I. Fabry¹, K. Fornet-Ponse⁵, M. Fuchs¹, Ch. Funke¹, R. Gothe⁵, R. Gregor², A. B. Gridnev³, St. Höffgen⁵, P. Hoffmeister¹, I. Horn¹, I. Jägle⁷, J. Junkersfeld¹, H. Kalinowsky¹, S. Kammer⁵, V. Kleber⁵, Friedrich Klein⁵, Frank Klein⁵, E. Klempt¹, M. Konrad⁵, M. Kotulla²^,7, B. Krusche⁷, M. Lang¹, J. Langheinrich⁵, H. Löhner⁴, I. V. Lopatin³, J. Lotz¹, S. Lugert², D. Menze⁵, T. Mertens⁷, J. G. Messchendorp⁴, V. Metag², C. Morales⁵, M. Nanova², V. A. Nikonov¹^,3, D. Novinsky¹^,3, R. Novotny², M. Ostrick⁵, L. Pant², M. Pfeiffer², A. Radkov³, A. V. Sarantsev¹^,3, S. Schadmand², Ch. Schmidt¹, H. Schmieden⁵, B. Schoch⁵, S. Shende⁴, A. Süle⁵, V. V. Sumachev³, T. Szczepanek¹, U. Thoma¹, D. Trnka², D. Walther⁵, Ch. Weinheimer¹ and Ch. Wendel¹

¹ Helmholtz-Institut für Strahlen- und Kernphysik der Universität Bonn, Germany
² II. Physikalisches Institut, Universität Gießen, Germany
³ Petersburg Nuclear Physics Institute, Gatchina, Russia
⁴ Kernfysisch Versneller Instituut, Groningen, The Netherlands
⁵ Physikalisches Institut, Universität Bonn, Germany
⁶ Department of Physics, Florida State University, Tallahassee, USA
⁷ Institut für Physik, Universität Basel, Switzerland

^* e-mail: gutz@hiskp.uni-bonn.de

Received: 2 January 2008
Accepted: 21 January 2008
Published online: 2 April 2008

Abstract

In photoproduction experiments, a large number of final states yielding various resonance contributions are accessible. To extract resonance parameters via partial-wave analysis not only the measurement of differential cross-sections is necessary, but also the determination of polarization observables. At the electron accelerator ELSA (Bonn) the coherent bremsstrahlung method was used to generate a linearly polarized photon beam. Using the CBELSA/TAPS detector setup, the beam asymmetry Σ in the reaction γp → pπ⁰η was determined as a function of various masses and angles for photon energies between 970MeV and 1650MeV.

PACS: 13.60.-r Photon and charged-lepton interactions with hadrons – / 13.60.Le Meson production – / 13.88.+e Polarization in interactions and scattering –

© Società Italiana di Fisica and Springer-Verlag, 2008