Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π-
Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay...
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E-Artikel |
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| Erschienen: |
1972 |
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Online-Ressource 45 |
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| Reproduktion: |
APS Digital Backfile Archive 1893-2003 |
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| Übergeordnetes Werk: |
Enthalten in: Physical review / D - [S.l.] : Soc., 1970, 5(1972), 3, Seite 545-589 |
| Übergeordnetes Werk: |
volume:5 ; year:1972 ; number:3 ; pages:545-589 ; extent:45 |
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NLEJ250106469 |
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| 245 | 1 | 0 | |a Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- |
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| 520 | |a Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. | ||
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| 700 | 1 | |a Guiragossián, Z. G. |4 oth | |
| 700 | 1 | |a Murray, J. J. |4 oth | |
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| 700 | 1 | |a Sinclair, C. K. |4 oth | |
| 700 | 1 | |a Skillicorn, I. O. |4 oth | |
| 700 | 1 | |a Spitzer, H. |4 oth | |
| 700 | 1 | |a Wolf, G. |4 oth | |
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(DE-627)NLEJ250106469 (DE-601)aps:17e6ba91ae4bb502dd3d11c77261d492737cde36 DE-627 ger DE-627 rakwb Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- 1972 Online-Ressource 45 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. APS Digital Backfile Archive 1893-2003 Ballam, J. oth Chadwick, G. B. oth Gearhart, R. oth Guiragossián, Z. G. oth Murray, J. J. oth Seyboth, P. oth Sinclair, C. K. oth Skillicorn, I. O. oth Spitzer, H. oth Wolf, G. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 5(1972), 3, Seite 545-589 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:5 year:1972 number:3 pages:545-589 extent:45 https://www.tib.eu/de/suchen/id/aps%3A17e6ba91ae4bb502dd3d11c77261d492737cde36 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 5 1972 3 545-589 45 |
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(DE-627)NLEJ250106469 (DE-601)aps:17e6ba91ae4bb502dd3d11c77261d492737cde36 DE-627 ger DE-627 rakwb Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- 1972 Online-Ressource 45 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. APS Digital Backfile Archive 1893-2003 Ballam, J. oth Chadwick, G. B. oth Gearhart, R. oth Guiragossián, Z. G. oth Murray, J. J. oth Seyboth, P. oth Sinclair, C. K. oth Skillicorn, I. O. oth Spitzer, H. oth Wolf, G. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 5(1972), 3, Seite 545-589 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:5 year:1972 number:3 pages:545-589 extent:45 https://www.tib.eu/de/suchen/id/aps%3A17e6ba91ae4bb502dd3d11c77261d492737cde36 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 5 1972 3 545-589 45 |
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(DE-627)NLEJ250106469 (DE-601)aps:17e6ba91ae4bb502dd3d11c77261d492737cde36 DE-627 ger DE-627 rakwb Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- 1972 Online-Ressource 45 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. APS Digital Backfile Archive 1893-2003 Ballam, J. oth Chadwick, G. B. oth Gearhart, R. oth Guiragossián, Z. G. oth Murray, J. J. oth Seyboth, P. oth Sinclair, C. K. oth Skillicorn, I. O. oth Spitzer, H. oth Wolf, G. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 5(1972), 3, Seite 545-589 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:5 year:1972 number:3 pages:545-589 extent:45 https://www.tib.eu/de/suchen/id/aps%3A17e6ba91ae4bb502dd3d11c77261d492737cde36 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 5 1972 3 545-589 45 |
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(DE-627)NLEJ250106469 (DE-601)aps:17e6ba91ae4bb502dd3d11c77261d492737cde36 DE-627 ger DE-627 rakwb Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- 1972 Online-Ressource 45 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. APS Digital Backfile Archive 1893-2003 Ballam, J. oth Chadwick, G. B. oth Gearhart, R. oth Guiragossián, Z. G. oth Murray, J. J. oth Seyboth, P. oth Sinclair, C. K. oth Skillicorn, I. O. oth Spitzer, H. oth Wolf, G. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 5(1972), 3, Seite 545-589 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:5 year:1972 number:3 pages:545-589 extent:45 https://www.tib.eu/de/suchen/id/aps%3A17e6ba91ae4bb502dd3d11c77261d492737cde36 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 5 1972 3 545-589 45 |
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(DE-627)NLEJ250106469 (DE-601)aps:17e6ba91ae4bb502dd3d11c77261d492737cde36 DE-627 ger DE-627 rakwb Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- 1972 Online-Ressource 45 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. APS Digital Backfile Archive 1893-2003 Ballam, J. oth Chadwick, G. B. oth Gearhart, R. oth Guiragossián, Z. G. oth Murray, J. J. oth Seyboth, P. oth Sinclair, C. K. oth Skillicorn, I. O. oth Spitzer, H. oth Wolf, G. oth Enthalten in Physical review / D [S.l.] : Soc., 1970 5(1972), 3, Seite 545-589 Online-Ressource (DE-627)NLEJ248237861 (DE-600)1461167-3 1550-2368 nnns volume:5 year:1972 number:3 pages:545-589 extent:45 https://www.tib.eu/de/suchen/id/aps%3A17e6ba91ae4bb502dd3d11c77261d492737cde36 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 5 1972 3 545-589 45 |
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Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- |
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Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- |
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Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- |
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Physical review / D |
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1972 |
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Elektronische Aufsätze |
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bubble-chamber study of photoproduction by 2.8- and 4.7-gev polarized photons. i. cross-section determinations and production of ρ0 and δ++ in the reaction γp→pπ+π- |
| title_auth |
Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- |
| abstract |
Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. |
| abstractGer |
Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. |
| abstract_unstemmed |
Photoproduction is studied at 2.8 and 4.7 GeV using a linearly polarized monoenergetic photon beam in a hydrogen bubble chamber. We discuss the experimental procedure, the determination of channel cross sections, and the analysis of the channel γp→pπ+π-. A model-independent analysis of the ρ0-decay angular distribution allows us to measure nine independent density-matrix elements. From these we find that the reaction γp→pρ0 proceeds almost completely through natural parity exchange for squared momentum transfers |t|<1 GeV2 and that the ρ production mechanism is consistent with s-channel c.m. helicity conservation for |t|<0.4 GeV2. A cross section for the production of π+π- pairs in the s-channel c.m. helicity-conserving p-wave state is determined. The ρ mass shape is studied as a function of momentum transfer and is found to be inconsistent with a t-independent Ross-Stodolsky factor. Using a t-dependent parametrization of the ρ0 mass shape we derive a phenomenological ρ0 cross section. We compare our phenomenological ρ0 cross section with other experiments and find good agreement for 0.05<|t|<1 GeV2. We discuss the discrepancies in the various determinations of the forward differential cross section. We study models for ρ0 photoproduction and find that the Söding model best describes the data. Using the Söding model we determine a ρ0 cross section. We determine cross sections and nine density-matrix elements for γp→Δ++π-. The parity asymmetry for Δ++ production is incompatible with simple one-pion exchange. We compare Δ++ production with models. |
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Bubble-Chamber Study of Photoproduction by 2.8- and 4.7-GeV Polarized Photons. I. Cross-Section Determinations and Production of ρ0 and Δ++ in the Reaction γp→pπ+π- |
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https://www.tib.eu/de/suchen/id/aps%3A17e6ba91ae4bb502dd3d11c77261d492737cde36 |
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Ballam, J. Chadwick, G. B. Gearhart, R. Guiragossián, Z. G. Murray, J. J. Seyboth, P. Sinclair, C. K. Skillicorn, I. O. Spitzer, H. Wolf, G. |
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Ballam, J. Chadwick, G. B. Gearhart, R. Guiragossián, Z. G. Murray, J. J. Seyboth, P. Sinclair, C. K. Skillicorn, I. O. Spitzer, H. Wolf, G. |
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