Adlarson, P., Augustyniak, W., Bardan, W. et al. (89 more authors) (2017) Isoscalar single-pion production in the region of Roper and d⁎(2380) resonances. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. pp. 599-607. ISSN 0370-2693
Abstract
Exclusive measurements of the quasi-free pn→ppπ− and pp→ppπ0 reactions have been performed by means of pd collisions at Tp=1.2 GeV using the WASA detector setup at COSY. Total and differential cross sections have been obtained covering the energy region Tp=0.95–1.3 GeV (s=2.3–2.46 GeV), which includes the regions of Δ(1232), N⁎(1440) and d⁎(2380) resonance excitations. From these measurements the isoscalar single-pion production has been extracted, for which data existed so far only below Tp=1 GeV. We observe a substantial increase of this cross section around 1 GeV, which can be related to the Roper resonance N⁎(1440), the strength of which shows up isolated from the Δ resonance in the isoscalar (Nπ)I=0 invariant-mass spectrum. No evidence for a decay of the dibaryon resonance d⁎(2380) into the isoscalar (NNπ)I=0 channel is found. An upper limit of 180 μb (90% C.L.) corresponding to a branching ratio of 9% has been deduced.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2017 The Author(s). Published by Elsevier B.V. |
Keywords: | Dibaryon resonance,Isoscalar part,Roper resonance,Single-pion production |
Dates: |
|
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 16:10 |
Last Modified: | 16 Oct 2024 15:04 |
Published Version: | https://doi.org/10.1016/j.physletb.2017.10.015 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.physletb.2017.10.015 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:135839 |
Download
Filename: 1_s2.0_S0370269317308274_main.pdf
Description: 1-s2.0-S0370269317308274-main
Licence: CC-BY-NC-ND 2.5