The p + p → π+ + d reaction close to threshold at COSY

M. Drochner; J. Ernst; S. Förtsch; L. Freindl; D. Frekers; W. Garske; K. Grewer; S. Igel; R. Jahn; L. Jarczyk; G. Kemmerling; K. Kilian; S. Kliczewski; W. Klimala; D. Kolev; T. Kutsarova; G. Lippert; H. Machner; R. Maier; C. Nake; B. Razen; P. Von Rossen; B. R. Roy; K. Scho; R. Siudak; J. Smyrski; A. Strzałkowski; R. Tsenov; P. A. Zołnierczuk; K. Zwoll

doi:10.1016/S0375-9474(98)00547-8

The p + p → π⁺ + d reaction close to threshold at COSY

M. Drochner, J. Ernst, S. Förtsch, L. Freindl, D. Frekers, W. Garske, K. Grewer, S. Igel, R. Jahn, L. Jarczyk, G. Kemmerling, K. Kilian, S. Kliczewski, W. Klimala, D. Kolev, T. Kutsarova, G. Lippert, H. Machner, R. Maier, C. NakeB. Razen, P. Von Rossen, B. R. Roy, K. Scho, R. Siudak, J. Smyrski, A. Strzałkowski, R. Tsenov, P. A. Zołnierczuk, K. Zwoll

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

66 Scopus citations

Abstract

Differential and total cross sections of the p + p → π⁺ + d reaction close to threshold were measured employing a magnetic spectrograph with track reconstruction, a very thin liquid hydrogen target and an accelerated proton beam with high phase space density. The data resolve a previous discrepancy between the n + p → π⁰ + d and the π⁺ + d → 2p reaction close to threshold indicating that isospin symmetry may be broken in the s-wave part of the cross section.

Original language	English
Pages (from-to)	55-82
Number of pages	28
Journal	Nuclear Physics A
Volume	643
Issue number	1
DOIs	https://doi.org/10.1016/S0375-9474(98)00547-8
State	Published - Nov 16 1998
Externally published	Yes

Funding

We are grateful to the COSY operating team for their continuous efforts of producing good beams. One of us (H.M.) acknowledges discussions with C. Hanhart and H. Nann. We are thankful for support by BMBF Germany (06 MS 568 I TP4), Internationales Btiro des BMBF (X081.24 and 211.6), SCSR Poland (2P302 025 and 2P03B 88 08), NSF Bulgaria (414), and COSY Jiilich.

Keywords

Isospin symmetry
Magnetic spectrometer
Meson threshold production
Partial wave analysis

Access to Document

10.1016/S0375-9474(98)00547-8

Cite this

Drochner, M., Ernst, J., Förtsch, S., Freindl, L., Frekers, D., Garske, W., Grewer, K., Igel, S., Jahn, R., Jarczyk, L., Kemmerling, G., Kilian, K., Kliczewski, S., Klimala, W., Kolev, D., Kutsarova, T., Lippert, G., Machner, H., Maier, R., ... Zwoll, K. (1998). The p + p → π⁺ + d reaction close to threshold at COSY. Nuclear Physics A, 643(1), 55-82. https://doi.org/10.1016/S0375-9474(98)00547-8

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abstract = "Differential and total cross sections of the p + p → π+ + d reaction close to threshold were measured employing a magnetic spectrograph with track reconstruction, a very thin liquid hydrogen target and an accelerated proton beam with high phase space density. The data resolve a previous discrepancy between the n + p → π0 + d and the π+ + d → 2p reaction close to threshold indicating that isospin symmetry may be broken in the s-wave part of the cross section.",

keywords = "Isospin symmetry, Magnetic spectrometer, Meson threshold production, Partial wave analysis",

author = "M. Drochner and J. Ernst and S. F{\"o}rtsch and L. Freindl and D. Frekers and W. Garske and K. Grewer and S. Igel and R. Jahn and L. Jarczyk and G. Kemmerling and K. Kilian and S. Kliczewski and W. Klimala and D. Kolev and T. Kutsarova and G. Lippert and H. Machner and R. Maier and C. Nake and B. Razen and {Von Rossen}, P. and Roy, {B. R.} and K. Scho and R. Siudak and J. Smyrski and A. Strza{\l}kowski and R. Tsenov and Zo{\l}nierczuk, {P. A.} and K. Zwoll",

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Drochner, M, Ernst, J, Förtsch, S, Freindl, L, Frekers, D, Garske, W, Grewer, K, Igel, S, Jahn, R, Jarczyk, L, Kemmerling, G, Kilian, K, Kliczewski, S, Klimala, W, Kolev, D, Kutsarova, T, Lippert, G, Machner, H, Maier, R, Nake, C, Razen, B, Von Rossen, P, Roy, BR, Scho, K, Siudak, R, Smyrski, J, Strzałkowski, A, Tsenov, R, Zołnierczuk, PA & Zwoll, K 1998, 'The p + p → π⁺ + d reaction close to threshold at COSY', Nuclear Physics A, vol. 643, no. 1, pp. 55-82. https://doi.org/10.1016/S0375-9474(98)00547-8

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T1 - The p + p → π+ + d reaction close to threshold at COSY

AU - Drochner, M.

AU - Ernst, J.

AU - Förtsch, S.

AU - Freindl, L.

AU - Frekers, D.

AU - Garske, W.

AU - Grewer, K.

AU - Igel, S.

AU - Jahn, R.

AU - Jarczyk, L.

AU - Kemmerling, G.

AU - Kilian, K.

AU - Kliczewski, S.

AU - Klimala, W.

AU - Kolev, D.

AU - Kutsarova, T.

AU - Lippert, G.

AU - Machner, H.

AU - Maier, R.

AU - Nake, C.

AU - Razen, B.

AU - Von Rossen, P.

AU - Roy, B. R.

AU - Scho, K.

AU - Siudak, R.

AU - Smyrski, J.

AU - Strzałkowski, A.

AU - Tsenov, R.

AU - Zołnierczuk, P. A.

AU - Zwoll, K.

PY - 1998/11/16

Y1 - 1998/11/16

N2 - Differential and total cross sections of the p + p → π+ + d reaction close to threshold were measured employing a magnetic spectrograph with track reconstruction, a very thin liquid hydrogen target and an accelerated proton beam with high phase space density. The data resolve a previous discrepancy between the n + p → π0 + d and the π+ + d → 2p reaction close to threshold indicating that isospin symmetry may be broken in the s-wave part of the cross section.

AB - Differential and total cross sections of the p + p → π+ + d reaction close to threshold were measured employing a magnetic spectrograph with track reconstruction, a very thin liquid hydrogen target and an accelerated proton beam with high phase space density. The data resolve a previous discrepancy between the n + p → π0 + d and the π+ + d → 2p reaction close to threshold indicating that isospin symmetry may be broken in the s-wave part of the cross section.

KW - Isospin symmetry

KW - Magnetic spectrometer

KW - Meson threshold production

KW - Partial wave analysis

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