Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc
A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) di...
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Gespeichert in:
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E-Artikel |
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| Erschienen: |
1969 |
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| Umfang: |
Online-Ressource 23 |
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| Reproduktion: |
APS Digital Backfile Archive 1893-2003 |
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| Übergeordnetes Werk: |
Enthalten in: The physical review - Lancaster, Pa. [u.a.], 1893, 182(1969), 5, Seite 1538-1560 |
| Übergeordnetes Werk: |
volume:182 ; year:1969 ; number:5 ; pages:1538-1560 ; extent:23 |
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| 245 | 1 | 0 | |a Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc |
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| 520 | |a A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. | ||
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(DE-627)NLEJ251495892 (DE-601)aps:19c4fd0b656a7ca55ace50631deafae05849fdae DE-627 ger DE-627 rakwb Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc 1969 Online-Ressource 23 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. APS Digital Backfile Archive 1893-2003 Wolf, Günter oth Enthalten in The physical review Lancaster, Pa. [u.a.], 1893 182(1969), 5, Seite 1538-1560 (DE-627)NLEJ24823790X (DE-600)2177092-X 1536-6065 nnns volume:182 year:1969 number:5 pages:1538-1560 extent:23 https://www.tib.eu/de/suchen/id/aps%3A19c4fd0b656a7ca55ace50631deafae05849fdae Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 182 1969 5 1538-1560 23 |
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(DE-627)NLEJ251495892 (DE-601)aps:19c4fd0b656a7ca55ace50631deafae05849fdae DE-627 ger DE-627 rakwb Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc 1969 Online-Ressource 23 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. APS Digital Backfile Archive 1893-2003 Wolf, Günter oth Enthalten in The physical review Lancaster, Pa. [u.a.], 1893 182(1969), 5, Seite 1538-1560 (DE-627)NLEJ24823790X (DE-600)2177092-X 1536-6065 nnns volume:182 year:1969 number:5 pages:1538-1560 extent:23 https://www.tib.eu/de/suchen/id/aps%3A19c4fd0b656a7ca55ace50631deafae05849fdae Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 182 1969 5 1538-1560 23 |
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(DE-627)NLEJ251495892 (DE-601)aps:19c4fd0b656a7ca55ace50631deafae05849fdae DE-627 ger DE-627 rakwb Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc 1969 Online-Ressource 23 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. APS Digital Backfile Archive 1893-2003 Wolf, Günter oth Enthalten in The physical review Lancaster, Pa. [u.a.], 1893 182(1969), 5, Seite 1538-1560 (DE-627)NLEJ24823790X (DE-600)2177092-X 1536-6065 nnns volume:182 year:1969 number:5 pages:1538-1560 extent:23 https://www.tib.eu/de/suchen/id/aps%3A19c4fd0b656a7ca55ace50631deafae05849fdae Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 182 1969 5 1538-1560 23 |
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(DE-627)NLEJ251495892 (DE-601)aps:19c4fd0b656a7ca55ace50631deafae05849fdae DE-627 ger DE-627 rakwb Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc 1969 Online-Ressource 23 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. APS Digital Backfile Archive 1893-2003 Wolf, Günter oth Enthalten in The physical review Lancaster, Pa. [u.a.], 1893 182(1969), 5, Seite 1538-1560 (DE-627)NLEJ24823790X (DE-600)2177092-X 1536-6065 nnns volume:182 year:1969 number:5 pages:1538-1560 extent:23 https://www.tib.eu/de/suchen/id/aps%3A19c4fd0b656a7ca55ace50631deafae05849fdae Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 182 1969 5 1538-1560 23 |
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(DE-627)NLEJ251495892 (DE-601)aps:19c4fd0b656a7ca55ace50631deafae05849fdae DE-627 ger DE-627 rakwb Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc 1969 Online-Ressource 23 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. APS Digital Backfile Archive 1893-2003 Wolf, Günter oth Enthalten in The physical review Lancaster, Pa. [u.a.], 1893 182(1969), 5, Seite 1538-1560 (DE-627)NLEJ24823790X (DE-600)2177092-X 1536-6065 nnns volume:182 year:1969 number:5 pages:1538-1560 extent:23 https://www.tib.eu/de/suchen/id/aps%3A19c4fd0b656a7ca55ace50631deafae05849fdae Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 182 1969 5 1538-1560 23 |
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The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. 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Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc |
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The physical review |
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The physical review |
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1969 |
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182 |
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Online-Ressource 23 |
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Elektronische Aufsätze |
| title_sort |
single- and double-pion production by one-pion exchange and a comparison with experimental data between 1.6 and 20 gevc |
| title_auth |
Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc |
| abstract |
A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. |
| abstractGer |
A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. |
| abstract_unstemmed |
A detailed comparison has been made between predictions of elementary one-pion exchange (OPE) and existing experimental data. The Benecke-Dürr (BD) parametrization was used to describe the vertex functions. The BD parametrization has one free parameter R for each vertex. The momentum transfer (t) distributions as measured between 1.6 and 10 GeVc for the reactions p¯p→Δ¯- -Δ++[Δ≡Δ(1236)], pp→Δ++n, π+p→Δ++ρ0, and π-p→nρ0 were used to fit the parameters RΔNπ, RNNπ, and Rρππ which describe the NNπ, ΔNπ, and ρππ vertices. With the three-parameter fit an excellent description of the data is achieved for |t|<1 GeV2 at all energies, a result which independently of any model demonstrates that the energy dependence of these reactions is that of elementary OPE. From the R parameters, values for various pionic rms radii were deduced: 〈rNNπ2〉12=1.06±0.04 F, 〈rΔNπ2〉12=0.86±0.02 F, and 〈rρππ2〉12=0.65±0.05 F. The NNπ and ΔNπ values agree with results from πN and ep scattering. As a further consistency check, the BD parametrization was used to describe the (32, 32) pion nucleon phase shift δ33 in the neighborhood of the Δ. A good fit to the δ33 data is found. The value of RΔNπ agrees within 20% with that from the fit to the t distributions. The OPE predictions were calculated for the reactions π±p→pπ+π±π- in absolute magnitude and compared with available experimental results on effective-mass and momentum-transfer distributions at beam momenta between 2.1 and 20 GeVc. In general, the shape of the distributions is quite well reproduced. Bumps which are present in the p2π mass distributions, and which may be taken as evidence for the production of nucleon isobars, can be understood as reflections of the OPE process. The OPE contributions are substantial at all energies; they amount to ∼40% near threshold and increase to ∼90% at 20 GeVc, in contrast to the naive expectation that at higher energies the exchange of particles with higher spin will dominate. |
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| title_short |
Single- and Double-Pion Production by One-Pion Exchange and a Comparison with Experimental Data between 1.6 and 20 GeVc |
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https://www.tib.eu/de/suchen/id/aps%3A19c4fd0b656a7ca55ace50631deafae05849fdae |
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Wolf, Günter |
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