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Importance of d-wave contributions in the charge symmetry breaking reaction dd→4Heπ0. / The WASA-at-COSY Collaboration.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 781, 10.06.2018, p. 645-650.

Research output: Contribution to journal › Article › peer-review

Harvard

The WASA-at-COSY Collaboration 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, vol. 781, pp. 645-650. https://doi.org/10.1016/j.physletb.2018.04.037

APA

The WASA-at-COSY Collaboration (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, 781, 645-650. https://doi.org/10.1016/j.physletb.2018.04.037

Vancouver

The WASA-at-COSY Collaboration. Importance of d-wave contributions in the charge symmetry breaking reaction dd→4Heπ0. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2018 Jun 10;781:645-650. doi: 10.1016/j.physletb.2018.04.037

Author

The WASA-at-COSY Collaboration. / Importance of d-wave contributions in the charge symmetry breaking reaction dd→4Heπ0. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2018 ; Vol. 781. pp. 645-650.

BibTeX

@article{aec84c01308648b7a963aaccf4f19526,
title = "Importance of d-wave contributions in the charge symmetry breaking reaction dd→4Heπ0",
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+bcos2⁡θ⁎, 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.",
keywords = "Charge symmetry breaking, Deuteron–deuteron interactions, Pion production, NEAR-THRESHOLD, Deuteron deuteron interactions, MESON PRODUCTION, QUARK MASSES, COSY, COLLISIONS",
author = "{The WASA-at-COSY Collaboration} and P. Adlarson and W. Augustyniak and W. Bardan and M. Bashkanov and Bergmann, {F. S.} and M. Ber{\l}owski and A. Bondar and M. B{\"u}scher and H. Cal{\'e}n and I. Ciepa{\l} and H. Clement and E. Czerwi{\'n}ski and K. Demmich and R. Engels and A. Erven and W. Erven and W. Eyrich and P. Fedorets and K. F{\"o}hl and K. Fransson and F. Goldenbaum and A. Goswami and K. Grigoryev and Gullstr{\"o}m, {C. O.} and C. Hanhart and L. Heijkenskj{\"o}ld and V. Hejny and N. H{\"u}sken and L. Jarczyk and T. Johansson and B. Kamys and G. Kemmerling and G. Khatri and A. Khoukaz and O. Khreptak and Kirillov, {D. A.} and S. Kistryn and H. Kleines and B. K{\l}os and W. Krzemie{\'n} and P. Kulessa and A. Kup{\'s}{\'c} and A. Kuzmin and K. Lalwani and D. Lersch and B. Lorentz and A. Magiera and R. Maier and P. Marciniewski and B. Shwartz",
note = "Publisher Copyright: {\textcopyright} 2018 The Author(s)",
year = "2018",
month = jun,
day = "10",
doi = "10.1016/j.physletb.2018.04.037",
language = "English",
volume = "781",
pages = "645--650",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Importance of d-wave contributions in the charge symmetry breaking reaction dd→4Heπ0

AU - The WASA-at-COSY Collaboration

AU - Adlarson, P.

AU - Augustyniak, W.

AU - Bardan, W.

AU - Bashkanov, M.

AU - Bergmann, F. S.

AU - Berłowski, M.

AU - Bondar, A.

AU - Büscher, M.

AU - Calén, H.

AU - Ciepał, I.

AU - Clement, H.

AU - Czerwiński, E.

AU - Demmich, K.

AU - Engels, R.

AU - Erven, A.

AU - Erven, W.

AU - Eyrich, W.

AU - Fedorets, P.

AU - Föhl, K.

AU - Fransson, K.

AU - Goldenbaum, F.

AU - Goswami, A.

AU - Grigoryev, K.

AU - Gullström, C. O.

AU - Hanhart, C.

AU - Heijkenskjöld, L.

AU - Hejny, V.

AU - Hüsken, N.

AU - Jarczyk, L.

AU - Johansson, T.

AU - Kamys, B.

AU - Kemmerling, G.

AU - Khatri, G.

AU - Khoukaz, A.

AU - Khreptak, O.

AU - Kirillov, D. A.

AU - Kistryn, S.

AU - Kleines, H.

AU - Kłos, B.

AU - Krzemień, W.

AU - Kulessa, P.

AU - Kupść, A.

AU - Kuzmin, A.

AU - Lalwani, K.

AU - Lersch, D.

AU - Lorentz, B.

AU - Magiera, A.

AU - Maier, R.

AU - Marciniewski, P.

AU - Shwartz, B.

N1 - Publisher Copyright: © 2018 The Author(s)

PY - 2018/6/10

Y1 - 2018/6/10

N2 - 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+bcos2⁡θ⁎, 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.

AB - 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+bcos2⁡θ⁎, 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.

KW - Charge symmetry breaking

KW - Deuteron–deuteron interactions

KW - Pion production

KW - NEAR-THRESHOLD

KW - Deuteron deuteron interactions

KW - MESON PRODUCTION

KW - QUARK MASSES

KW - COSY

KW - COLLISIONS

UR - http://www.scopus.com/inward/record.url?scp=85046804728&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2018.04.037

DO - 10.1016/j.physletb.2018.04.037

M3 - Article

AN - SCOPUS:85046804728

VL - 781

SP - 645

EP - 650

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

ER -

ID: 13354851