Total cross section for p+p→p+p+π0 close to threshold

H. O. Meyer; C. Horowitz; H. Nann; P. V. Pancella; S. F. Pate; R. E. Pollock; B. Von Przewoski; T. Rinckel; M. A. Ross; F. Sperisen

doi:10.1016/0375-9474(92)90130-c

Total cross section for p+p→p+p+π⁰ close to threshold

H. O. Meyer, C. Horowitz, H. Nann, P. V. Pancella, S. F. Pate, R. E. Pollock, B. Von Przewoski, T. Rinckel, M. A. Ross, F. Sperisen

Indiana University Bloomington

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

159 Scopus citations

Abstract

Making use of an electron-cooled beam in the IUCF storage ring, we have measured the total cross section σ_tot for pp→ppπ⁰ at 31 bombarding energies between 285 and 325 MeV. At a level of about 5%, the data show no fluctuations that could be associated with the onset of other pion production channels. A calculation of the single-partial-wave cross section σ_ss, including direct production only (no rescattering), falls short of the experiment by a factor of 5.2±0.3, but reproduces the observed energy dependence when scaled. This energy dependence is explained by contributions from the phase-space factor and the final-state interaction between the outgoing nucleons. The relative importance of higher partial waves is deduced from the energy dependence of σ_tot as well as from the angular distributions of reaction protons.

Original language	English
Pages (from-to)	633-661
Number of pages	29
Journal	Nuclear Physics A
Volume	539
Issue number	4
DOIs	https://doi.org/10.1016/0375-9474(92)90130-c
State	Published - 6 Apr 1992
Externally published	Yes

Bibliographical note

Funding Information:
The authors would like to thank D. Hutcheon, D. Lichtenberg and G.A. Miller for useful discussions and P. Schwandt for his contribution to the design of experimental hardware . This work has been supported by the US National Science Foundation under grant NSF PI-IY 87-14406 and one of us (B .v .P .) has been supported by the Deutscher Akademischer Austauschdienst.

Funding

The authors would like to thank D. Hutcheon, D. Lichtenberg and G.A. Miller for useful discussions and P. Schwandt for his contribution to the design of experimental hardware . This work has been supported by the US National Science Foundation under grant NSF PI-IY 87-14406 and one of us (B .v .P .) has been supported by the Deutscher Akademischer Austauschdienst.

Funders	Funder number
US National Science Foundation	NSF PI-IY 87-14406
Deutscher Akademischer Austauschdienst

Keywords

Nuclear reaction

Access to Document

10.1016/0375-9474(92)90130-c

Cite this

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title = "Total cross section for p+p→p+p+π0 close to threshold",

abstract = "Making use of an electron-cooled beam in the IUCF storage ring, we have measured the total cross section σtot for pp→ppπ0 at 31 bombarding energies between 285 and 325 MeV. At a level of about 5%, the data show no fluctuations that could be associated with the onset of other pion production channels. A calculation of the single-partial-wave cross section σss, including direct production only (no rescattering), falls short of the experiment by a factor of 5.2±0.3, but reproduces the observed energy dependence when scaled. This energy dependence is explained by contributions from the phase-space factor and the final-state interaction between the outgoing nucleons. The relative importance of higher partial waves is deduced from the energy dependence of σtot as well as from the angular distributions of reaction protons.",

keywords = "Nuclear reaction",

author = "Meyer, {H. O.} and C. Horowitz and H. Nann and Pancella, {P. V.} and Pate, {S. F.} and Pollock, {R. E.} and {Von Przewoski}, B. and T. Rinckel and Ross, {M. A.} and F. Sperisen",

note = "Funding Information: The authors would like to thank D. Hutcheon, D. Lichtenberg and G.A. Miller for useful discussions and P. Schwandt for his contribution to the design of experimental hardware . This work has been supported by the US National Science Foundation under grant NSF PI-IY 87-14406 and one of us (B .v .P .) has been supported by the Deutscher Akademischer Austauschdienst.",

year = "1992",

month = apr,

day = "6",

doi = "10.1016/0375-9474(92)90130-c",

language = "אנגלית",

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TY - JOUR

T1 - Total cross section for p+p→p+p+π0 close to threshold

AU - Meyer, H. O.

AU - Horowitz, C.

AU - Nann, H.

AU - Pancella, P. V.

AU - Pate, S. F.

AU - Pollock, R. E.

AU - Von Przewoski, B.

AU - Rinckel, T.

AU - Ross, M. A.

AU - Sperisen, F.

N1 - Funding Information: The authors would like to thank D. Hutcheon, D. Lichtenberg and G.A. Miller for useful discussions and P. Schwandt for his contribution to the design of experimental hardware . This work has been supported by the US National Science Foundation under grant NSF PI-IY 87-14406 and one of us (B .v .P .) has been supported by the Deutscher Akademischer Austauschdienst.

PY - 1992/4/6

Y1 - 1992/4/6

N2 - Making use of an electron-cooled beam in the IUCF storage ring, we have measured the total cross section σtot for pp→ppπ0 at 31 bombarding energies between 285 and 325 MeV. At a level of about 5%, the data show no fluctuations that could be associated with the onset of other pion production channels. A calculation of the single-partial-wave cross section σss, including direct production only (no rescattering), falls short of the experiment by a factor of 5.2±0.3, but reproduces the observed energy dependence when scaled. This energy dependence is explained by contributions from the phase-space factor and the final-state interaction between the outgoing nucleons. The relative importance of higher partial waves is deduced from the energy dependence of σtot as well as from the angular distributions of reaction protons.

AB - Making use of an electron-cooled beam in the IUCF storage ring, we have measured the total cross section σtot for pp→ppπ0 at 31 bombarding energies between 285 and 325 MeV. At a level of about 5%, the data show no fluctuations that could be associated with the onset of other pion production channels. A calculation of the single-partial-wave cross section σss, including direct production only (no rescattering), falls short of the experiment by a factor of 5.2±0.3, but reproduces the observed energy dependence when scaled. This energy dependence is explained by contributions from the phase-space factor and the final-state interaction between the outgoing nucleons. The relative importance of higher partial waves is deduced from the energy dependence of σtot as well as from the angular distributions of reaction protons.

KW - Nuclear reaction

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