Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target
In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measur...
Ausführliche Beschreibung
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E-Artikel |
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1985 |
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Online-Ressource 14 |
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APS Digital Backfile Archive 1893-2003 |
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| Übergeordnetes Werk: |
Enthalten in: Physical review / D - [S.l.] : Soc., 1970, 32(1985), 1, Seite 21-34 |
| Übergeordnetes Werk: |
volume:32 ; year:1985 ; number:1 ; pages:21-34 ; extent:14 |
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| 245 | 1 | 0 | |a Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target |
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| 520 | |a In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. | ||
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| 700 | 1 | |a Bystricky, J. |4 oth | |
| 700 | 1 | |a Cozzika, G. |4 oth | |
| 700 | 1 | |a Dobrowolski, T. |4 oth | |
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(DE-627)NLEJ25021251X (DE-601)aps:0103035f0a751336c3e9682188430a8223219217 DE-627 ger DE-627 rakwb Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target 1985 Online-Ressource 14 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. APS Digital Backfile Archive 1893-2003 de Lesquen, A. oth van Rossum, L. oth Svec, M. oth Babou, M. oth Bystricky, J. oth Cozzika, G. oth Dobrowolski, T. oth Ducros, Y. oth Fujisaki, M. oth Gaidot, A. oth Hwang, C. F. oth Itano, A. oth Khantine-Langlois, F. oth Lehar, F. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 32(1985), 1, Seite 21-34 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:32 year:1985 number:1 pages:21-34 extent:14 https://www.tib.eu/de/suchen/id/aps%3A0103035f0a751336c3e9682188430a8223219217 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 32 1985 1 21-34 14 |
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(DE-627)NLEJ25021251X (DE-601)aps:0103035f0a751336c3e9682188430a8223219217 DE-627 ger DE-627 rakwb Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target 1985 Online-Ressource 14 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. APS Digital Backfile Archive 1893-2003 de Lesquen, A. oth van Rossum, L. oth Svec, M. oth Babou, M. oth Bystricky, J. oth Cozzika, G. oth Dobrowolski, T. oth Ducros, Y. oth Fujisaki, M. oth Gaidot, A. oth Hwang, C. F. oth Itano, A. oth Khantine-Langlois, F. oth Lehar, F. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 32(1985), 1, Seite 21-34 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:32 year:1985 number:1 pages:21-34 extent:14 https://www.tib.eu/de/suchen/id/aps%3A0103035f0a751336c3e9682188430a8223219217 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 32 1985 1 21-34 14 |
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(DE-627)NLEJ25021251X (DE-601)aps:0103035f0a751336c3e9682188430a8223219217 DE-627 ger DE-627 rakwb Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target 1985 Online-Ressource 14 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. APS Digital Backfile Archive 1893-2003 de Lesquen, A. oth van Rossum, L. oth Svec, M. oth Babou, M. oth Bystricky, J. oth Cozzika, G. oth Dobrowolski, T. oth Ducros, Y. oth Fujisaki, M. oth Gaidot, A. oth Hwang, C. F. oth Itano, A. oth Khantine-Langlois, F. oth Lehar, F. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 32(1985), 1, Seite 21-34 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:32 year:1985 number:1 pages:21-34 extent:14 https://www.tib.eu/de/suchen/id/aps%3A0103035f0a751336c3e9682188430a8223219217 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 32 1985 1 21-34 14 |
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(DE-627)NLEJ25021251X (DE-601)aps:0103035f0a751336c3e9682188430a8223219217 DE-627 ger DE-627 rakwb Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target 1985 Online-Ressource 14 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. APS Digital Backfile Archive 1893-2003 de Lesquen, A. oth van Rossum, L. oth Svec, M. oth Babou, M. oth Bystricky, J. oth Cozzika, G. oth Dobrowolski, T. oth Ducros, Y. oth Fujisaki, M. oth Gaidot, A. oth Hwang, C. F. oth Itano, A. oth Khantine-Langlois, F. oth Lehar, F. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 32(1985), 1, Seite 21-34 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:32 year:1985 number:1 pages:21-34 extent:14 https://www.tib.eu/de/suchen/id/aps%3A0103035f0a751336c3e9682188430a8223219217 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 32 1985 1 21-34 14 |
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(DE-627)NLEJ25021251X (DE-601)aps:0103035f0a751336c3e9682188430a8223219217 DE-627 ger DE-627 rakwb Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target 1985 Online-Ressource 14 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. APS Digital Backfile Archive 1893-2003 de Lesquen, A. oth van Rossum, L. oth Svec, M. oth Babou, M. oth Bystricky, J. oth Cozzika, G. oth Dobrowolski, T. oth Ducros, Y. oth Fujisaki, M. oth Gaidot, A. oth Hwang, C. F. oth Itano, A. oth Khantine-Langlois, F. oth Lehar, F. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 32(1985), 1, Seite 21-34 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:32 year:1985 number:1 pages:21-34 extent:14 https://www.tib.eu/de/suchen/id/aps%3A0103035f0a751336c3e9682188430a8223219217 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 32 1985 1 21-34 14 |
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de Lesquen, A. @@oth@@ van Rossum, L. @@oth@@ Svec, M. @@oth@@ Babou, M. @@oth@@ Bystricky, J. @@oth@@ Cozzika, G. @@oth@@ Dobrowolski, T. @@oth@@ Ducros, Y. @@oth@@ Fujisaki, M. @@oth@@ Gaidot, A. @@oth@@ Hwang, C. F. @@oth@@ Itano, A. @@oth@@ Khantine-Langlois, F. @@oth@@ Lehar, F. @@oth@@ |
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Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target |
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Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target |
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Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target |
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Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target |
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measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 gev/c using a transversely polarized deuteron target |
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Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target |
| abstract |
In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. |
| abstractGer |
In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. |
| abstract_unstemmed |
In an experiment carried out at the CERN Proton Synchrotron and using the CERN polarized deuteron target, the reaction π+n↑→π+π-p has been measured in the region -t=0.1–1.0 (GeV/c)2 and m(π+π-)=0.36–1.04 GeV at incident momenta of 5.98 and 11.85 GeV/c. We present the m and t dependence of the measured 14 linearly independent spin-density-matrix elements and of the bounds on the moduli squared of the S- and P-wave recoil transversity amplitudes. The results show the presence of ‘‘A1’’ exchange in the unnatural nucleon-helicity-nonflip amplitudes. The natural ‘‘A2’’-exchange amplitudes dominate at large t. In the range 0.2≤-t≤0.4 (GeV/c)2 the mass dependence shows that the unnatural exchange amplitudes with transversity ‘‘down’’ are generally larger than those with transversity ‘‘up.’’ The opposite is true for the natural exchange. In this range of t and at the ρ0 mass, the P-wave unnatural amplitudes with both transversities contribute in equal amounts while the production by natural exchange proceeds entirely with transversity up. We observe rapid changes of the moduli within the ρ0 mass range and variations of the width and the position of the ρ0 peak in spin-averaged partial-wave cross sections. These structures have not been seen in previous polarization experiments and reveal spin dependence of ρ0 production. Our bounds cannot exclude an S-wave resonance in the range 700–800 MeV. The results emphasize the need for a better experimental and theoretical understanding of the mass dependence of the production mechanism. |
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Measurement of the reaction π+n↑→π+π-p at 5.98 and 11.85 GeV/c using a transversely polarized deuteron target |
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de Lesquen, A. van Rossum, L. Svec, M. Babou, M. Bystricky, J. Cozzika, G. Dobrowolski, T. Ducros, Y. Fujisaki, M. Gaidot, A. Hwang, C. F. Itano, A. Khantine-Langlois, F. Lehar, F. |
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de Lesquen, A. van Rossum, L. Svec, M. Babou, M. Bystricky, J. Cozzika, G. Dobrowolski, T. Ducros, Y. Fujisaki, M. Gaidot, A. Hwang, C. F. Itano, A. Khantine-Langlois, F. Lehar, F. |
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