Maghrbi, Y., Krusche, B., Ahrens, J. et al. (60 more authors) (2013) Coherent photoproduction of π0- and η-mesons off 7Li. European Physical Journal A : Hadrons and Nuclei. ISSN 1434-601X
Abstract
Coherent photoproduction of π0-mesons from threshold (Eth≈ 136 MeV) throughout the Δ-resonance region and of η-mesons close to the production threshold (Eth≈ 570 MeV for η has been measured for 7Li nuclei. The experiment was performed using the tagged-photon beam of the Mainz MAMI accelerator with the Crystal Ball and TAPS detectors combined to give an almost 4π solid-angle electromagnetic calorimeter. The reactions were identified by a combined invariant-mass and missing-energy analysis. A comparison of the pion data to plane-wave impulse modelling tests the nuclear mass form factor. So far coherent η production had been only identified for the lightest nuclear systems (2H and 3He . For 3He a large enhancement of the cross section above plane-wave approximations had been reported, indicating the formation of a quasi-bound state. The present Li data for η production agree with a plane-wave approximation. Contrary to 3He , neither a threshold enhancement of the total cross section nor a deviation of the angular distributions from the expected form factor dependence were observed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 19 Sep 2018 09:50 |
Last Modified: | 21 Jan 2025 17:35 |
Published Version: | https://doi.org/10.1140/epja/i2013-13038-3 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1140/epja/i2013-13038-3 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:135897 |