Search for bound η-nucleus states

Urbán, J. ; Budzanowski, A. ; Chatterjee, A. ; Kailas, S. ; et., al (2009) Search for bound η-nucleus states International Journal of Modern Physics A, 24 (2-3). pp. 206-213. ISSN 0217-751X

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Official URL: http://www.worldscinet.com/ijmpa/24/2402n03/S02177...

Related URL: http://dx.doi.org/10.1142/S0217751X09043493

Abstract

The extracted s-wave scattering amplitude from both the polarized and unpolarized d + d → 4He + η reaction at 2385.5 MeV/c allowed to determine the scattering length which fulfills the requirements for bound η. In the p + 27Al → 3He + p + Π- + X reaction studied at recoil free kinematics the η meson is produced almost at rest and so it can be bound with enhanced probability. This state proceeds via N(1535) resonance and the decay products proton and pion emitted into opposite direction are detected in concidence with 3He produced at zero degree. Under these conditions some hints for bound state can be observed with an upper limit of the cross section of ≈0.5 nb.

Item Type:Article
Source:Copyright of this article belongs to World Scientific Publishing Company.
Keywords:Eta Nucleus Bound State; Polarized Deuteron Beam; Reaction Amplitude; s-wave Scattering Length; Recoil Free Kinematics; Missing Mass Technique
ID Code:85481
Deposited On:03 Mar 2012 07:40
Last Modified:03 Mar 2012 07:40

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