Adlarson, P., Augustyniak, W., Bardan, W. et al. (47 more authors) (2018) Importance of d-wave contributions in the charge symmetry breaking reaction dd→4Heπ0. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. pp. 645-650. ISSN 0370-2693
Abstract
This letter reports a first quantitative analysis of the contribution of higher partial waves in the charge symmetry breaking reaction dd→4Heπ0 using the WASA-at-COSY detector setup at an excess energy of Q=60MeV. The determined differential cross section can be parametrized as dσ/dΩ=a+bcos2θ⁎, where θ⁎ is the production angle of the pion in the center-of-mass coordinate system, and the results for the parameters are a=(1.55±0.46(stat)+0.32 −0.8(syst))pb/sr and b=(13.1±2.1(stat)−2.7 +1.0(syst))pb/sr. The data are compatible with vanishing p-waves and a sizable d-wave contribution. This finding should strongly constrain the contribution of the Δ isobar to the dd→4Heπ0 reaction and is, therefore, crucial for a quantitative understanding of quark mass effects in nuclear production reactions.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 The Author(s). Published by Elsevier B.V. |
Keywords: | Charge symmetry breaking,Deuteron–deuteron interactions,Pion production |
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: | 17 Sep 2018 13:50 |
Last Modified: | 16 Oct 2024 15:04 |
Published Version: | https://doi.org/10.1016/j.physletb.2018.04.037 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.physletb.2018.04.037 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:135809 |
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