Abstract
The differential cross-sections (DCS) of the η-production reaction π − p → ηn are measured at momenta of incident π − mesons (700, 710 and 720MeV/c) close to the threshold of this reaction. The experiment is carried out at the pion channel of the PNPI synchrocyclotron (with the momentum spread of the pion beam equal to 1.5%) using the Neutral Meson Spectrometer (NMS) designed and created at the Meson Physics Laboratory for detecting two photons from the decay η → 2γ. This spectrometer consisting of two electromagnetic total absorption calorimeter (24 CsI(Na) crystals in each calorimeter) allowed to obtain the DCS in the whole angular range from 0° to 180° in the c.m.s. It is shown that at 700MeV/c the DCS angular dependence is isotropic, indicating on the S-wave character of the η-production process while at higher momenta a significant contribution of the D-wave has led to the anisotropic angular dependence having a bowl-like shape.
Original article based on material presented at NSTAR 2007.
Paper reprinted from Eur. Phys. J. A with permission
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
References
D.E. Bayadilov et al., Phys. At. Nucl. 67, 512 (2004).
D.E. Bayadilov et al., Proceedings of the Tenth International Conference on Hadron Spectroscopy, Aschaffenburg, Germany, 31 August–6 September 2003, AIP Conf. Proc. 717, 270 (2004).
D.E. Bayadilov et al., Preprint PNPI-2612, Gatchina, 2005.
D.E. Bayadilov et al., Preprint PNPI-2719, Gatchina, 2007.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2008 Società Italiana di Fisica / Springer-Verlag
About this paper
Cite this paper
Bayadilov, D.E. et al. (2008). Study of η-production reaction π −p → ηn in the near-threshold region. In: Hammer, HW., Kleber, V., Thoma, U., Schmieden, H. (eds) NSTAR 2007. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-85144-8_44
Download citation
DOI: https://doi.org/10.1007/978-3-540-85144-8_44
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-85143-1
Online ISBN: 978-3-540-85144-8
eBook Packages: Physics and AstronomyPhysics and Astronomy (R0)