Neutral Pion Threshold Production at Q2=0.05 GeV2/c2 and Chiral Perturbation Theory
New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy...
Ausführliche Beschreibung
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E-Artikel |
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2001 |
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Online-Ressource 4 |
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APS Digital Backfile Archive 1893-2003 |
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Enthalten in: Physical review letters - College Park, Md. : APS, 1958, 88(2001), 1 |
| Übergeordnetes Werk: |
volume:88 ; year:2001 ; number:1 ; extent:4 |
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NLEJ250616513 |
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| 520 | |a New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. | ||
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| 700 | 1 | |a Bartsch, P. |4 oth | |
| 700 | 1 | |a Baumann, D. |4 oth | |
| 700 | 1 | |a Bermuth, J. |4 oth | |
| 700 | 1 | |a Bernstein, A. M. |4 oth | |
| 700 | 1 | |a Bohinc, K. |4 oth | |
| 700 | 1 | |a Böhm, R. |4 oth | |
| 700 | 1 | |a Clawiter, N. |4 oth | |
| 700 | 1 | |a Derber, S. |4 oth | |
| 700 | 1 | |a Ding, M. |4 oth | |
| 700 | 1 | |a Distler, M. O. |4 oth | |
| 700 | 1 | |a Ewald, I. |4 oth | |
| 700 | 1 | |a Friedrich, J. M. |4 oth | |
| 700 | 1 | |a Friedrich, J. |4 oth | |
| 700 | 1 | |a Jennewein, P. |4 oth | |
| 700 | 1 | |a Kahrau, M. |4 oth | |
| 700 | 1 | |a Kohl, M. |4 oth | |
| 700 | 1 | |a Krygier, K. W. |4 oth | |
| 700 | 1 | |a Kuss, M. |4 oth | |
| 700 | 1 | |a Liesenfeld, A. |4 oth | |
| 700 | 1 | |a Merle, P. |4 oth | |
| 700 | 1 | |a Miskimen, R. A. |4 oth | |
| 700 | 1 | |a Müller, U. |4 oth | |
| 700 | 1 | |a Neuhausen, R. |4 oth | |
| 700 | 1 | |a Pavan, M. M. |4 oth | |
| 700 | 1 | |a Pospischil, Th. |4 oth | |
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(DE-627)NLEJ250616513 (DE-601)aps:1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea DE-627 ger DE-627 rakwb Neutral Pion Threshold Production at Q2=0.05 GeV2/c2 and Chiral Perturbation Theory 2001 Online-Ressource 4 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. APS Digital Backfile Archive 1893-2003 Merkel, H. oth Bartsch, P. oth Baumann, D. oth Bermuth, J. oth Bernstein, A. M. oth Bohinc, K. oth Böhm, R. oth Clawiter, N. oth Derber, S. oth Ding, M. oth Distler, M. O. oth Ewald, I. oth Friedrich, J. M. oth Friedrich, J. oth Jennewein, P. oth Kahrau, M. oth Kohl, M. oth Krygier, K. W. oth Kuss, M. oth Liesenfeld, A. oth Merle, P. oth Miskimen, R. A. oth Müller, U. oth Neuhausen, R. oth Pavan, M. M. oth Pospischil, Th. oth Potokar, M. oth Rosner, G. oth Schmieden, H. oth Seimetz, M. oth Širca, S. oth Wagner, A. oth Walcher, Th. oth Weis, M. oth Enthalten in Physical review letters College Park, Md. : APS, 1958 88(2001), 1 Online-Ressource (DE-627)NLEJ248237888 (DE-600)1472655-5 1079-7114 nnns volume:88 year:2001 number:1 extent:4 https://www.tib.eu/de/suchen/id/aps%3A1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 88 2001 1 4 |
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(DE-627)NLEJ250616513 (DE-601)aps:1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea DE-627 ger DE-627 rakwb Neutral Pion Threshold Production at Q2=0.05 GeV2/c2 and Chiral Perturbation Theory 2001 Online-Ressource 4 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. APS Digital Backfile Archive 1893-2003 Merkel, H. oth Bartsch, P. oth Baumann, D. oth Bermuth, J. oth Bernstein, A. M. oth Bohinc, K. oth Böhm, R. oth Clawiter, N. oth Derber, S. oth Ding, M. oth Distler, M. O. oth Ewald, I. oth Friedrich, J. M. oth Friedrich, J. oth Jennewein, P. oth Kahrau, M. oth Kohl, M. oth Krygier, K. W. oth Kuss, M. oth Liesenfeld, A. oth Merle, P. oth Miskimen, R. A. oth Müller, U. oth Neuhausen, R. oth Pavan, M. M. oth Pospischil, Th. oth Potokar, M. oth Rosner, G. oth Schmieden, H. oth Seimetz, M. oth Širca, S. oth Wagner, A. oth Walcher, Th. oth Weis, M. oth Enthalten in Physical review letters College Park, Md. : APS, 1958 88(2001), 1 Online-Ressource (DE-627)NLEJ248237888 (DE-600)1472655-5 1079-7114 nnns volume:88 year:2001 number:1 extent:4 https://www.tib.eu/de/suchen/id/aps%3A1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 88 2001 1 4 |
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(DE-627)NLEJ250616513 (DE-601)aps:1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea DE-627 ger DE-627 rakwb Neutral Pion Threshold Production at Q2=0.05 GeV2/c2 and Chiral Perturbation Theory 2001 Online-Ressource 4 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. APS Digital Backfile Archive 1893-2003 Merkel, H. oth Bartsch, P. oth Baumann, D. oth Bermuth, J. oth Bernstein, A. M. oth Bohinc, K. oth Böhm, R. oth Clawiter, N. oth Derber, S. oth Ding, M. oth Distler, M. O. oth Ewald, I. oth Friedrich, J. M. oth Friedrich, J. oth Jennewein, P. oth Kahrau, M. oth Kohl, M. oth Krygier, K. W. oth Kuss, M. oth Liesenfeld, A. oth Merle, P. oth Miskimen, R. A. oth Müller, U. oth Neuhausen, R. oth Pavan, M. M. oth Pospischil, Th. oth Potokar, M. oth Rosner, G. oth Schmieden, H. oth Seimetz, M. oth Širca, S. oth Wagner, A. oth Walcher, Th. oth Weis, M. oth Enthalten in Physical review letters College Park, Md. : APS, 1958 88(2001), 1 Online-Ressource (DE-627)NLEJ248237888 (DE-600)1472655-5 1079-7114 nnns volume:88 year:2001 number:1 extent:4 https://www.tib.eu/de/suchen/id/aps%3A1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 88 2001 1 4 |
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(DE-627)NLEJ250616513 (DE-601)aps:1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea DE-627 ger DE-627 rakwb Neutral Pion Threshold Production at Q2=0.05 GeV2/c2 and Chiral Perturbation Theory 2001 Online-Ressource 4 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. APS Digital Backfile Archive 1893-2003 Merkel, H. oth Bartsch, P. oth Baumann, D. oth Bermuth, J. oth Bernstein, A. M. oth Bohinc, K. oth Böhm, R. oth Clawiter, N. oth Derber, S. oth Ding, M. oth Distler, M. O. oth Ewald, I. oth Friedrich, J. M. oth Friedrich, J. oth Jennewein, P. oth Kahrau, M. oth Kohl, M. oth Krygier, K. W. oth Kuss, M. oth Liesenfeld, A. oth Merle, P. oth Miskimen, R. A. oth Müller, U. oth Neuhausen, R. oth Pavan, M. M. oth Pospischil, Th. oth Potokar, M. oth Rosner, G. oth Schmieden, H. oth Seimetz, M. oth Širca, S. oth Wagner, A. oth Walcher, Th. oth Weis, M. oth Enthalten in Physical review letters College Park, Md. : APS, 1958 88(2001), 1 Online-Ressource (DE-627)NLEJ248237888 (DE-600)1472655-5 1079-7114 nnns volume:88 year:2001 number:1 extent:4 https://www.tib.eu/de/suchen/id/aps%3A1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 88 2001 1 4 |
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(DE-627)NLEJ250616513 (DE-601)aps:1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea DE-627 ger DE-627 rakwb Neutral Pion Threshold Production at Q2=0.05 GeV2/c2 and Chiral Perturbation Theory 2001 Online-Ressource 4 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. APS Digital Backfile Archive 1893-2003 Merkel, H. oth Bartsch, P. oth Baumann, D. oth Bermuth, J. oth Bernstein, A. M. oth Bohinc, K. oth Böhm, R. oth Clawiter, N. oth Derber, S. oth Ding, M. oth Distler, M. O. oth Ewald, I. oth Friedrich, J. M. oth Friedrich, J. oth Jennewein, P. oth Kahrau, M. oth Kohl, M. oth Krygier, K. W. oth Kuss, M. oth Liesenfeld, A. oth Merle, P. oth Miskimen, R. A. oth Müller, U. oth Neuhausen, R. oth Pavan, M. M. oth Pospischil, Th. oth Potokar, M. oth Rosner, G. oth Schmieden, H. oth Seimetz, M. oth Širca, S. oth Wagner, A. oth Walcher, Th. oth Weis, M. oth Enthalten in Physical review letters College Park, Md. : APS, 1958 88(2001), 1 Online-Ressource (DE-627)NLEJ248237888 (DE-600)1472655-5 1079-7114 nnns volume:88 year:2001 number:1 extent:4 https://www.tib.eu/de/suchen/id/aps%3A1a8a6815a09fbf85e7aa37f8bf5561d7f2dc9dea Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 88 2001 1 4 |
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Merkel, H. @@oth@@ Bartsch, P. @@oth@@ Baumann, D. @@oth@@ Bermuth, J. @@oth@@ Bernstein, A. M. @@oth@@ Bohinc, K. @@oth@@ Böhm, R. @@oth@@ Clawiter, N. @@oth@@ Derber, S. @@oth@@ Ding, M. @@oth@@ Distler, M. O. @@oth@@ Ewald, I. @@oth@@ Friedrich, J. M. @@oth@@ Friedrich, J. @@oth@@ Jennewein, P. @@oth@@ Kahrau, M. @@oth@@ Kohl, M. @@oth@@ Krygier, K. W. @@oth@@ Kuss, M. @@oth@@ Liesenfeld, A. @@oth@@ Merle, P. @@oth@@ Miskimen, R. A. @@oth@@ Müller, U. @@oth@@ Neuhausen, R. @@oth@@ Pavan, M. M. @@oth@@ Pospischil, Th. @@oth@@ Potokar, M. @@oth@@ Rosner, G. @@oth@@ Schmieden, H. @@oth@@ Seimetz, M. @@oth@@ Širca, S. @@oth@@ Wagner, A. @@oth@@ Walcher, Th. @@oth@@ Weis, M. @@oth@@ |
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Neutral Pion Threshold Production at Q2=0.05 GeV2/c2 and Chiral Perturbation Theory |
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New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. |
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New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. |
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New data are presented on the p(e,e′p)π0 reaction at threshold at a four-momentum transfer of Q2=0.05 GeV2/c2. The data were taken with the three-spectrometer setup of the A1 Collaboration at the Mainz Microtron MAMI. The complete center of mass solid angle was covered up to a center of mass energy of 4 MeV above threshold. Combined with measurements at three different values of the virtual photon polarization ε, the structure functions σT, σL, σTT, and σTL are determined. The results are compared with calculations in heavy baryon chiral perturbation theory and with a phenomenological model. The measured cross section is significantly smaller than both predictions. |
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Merkel, H. Bartsch, P. Baumann, D. Bermuth, J. Bernstein, A. M. Bohinc, K. Böhm, R. Clawiter, N. Derber, S. Ding, M. Distler, M. O. Ewald, I. Friedrich, J. M. Friedrich, J. Jennewein, P. Kahrau, M. Kohl, M. Krygier, K. W. Kuss, M. Liesenfeld, A. Merle, P. Miskimen, R. A. Müller, U. Neuhausen, R. Pavan, M. M. Pospischil, Th Potokar, M. Rosner, G. Schmieden, H. Seimetz, M. Širca, S. Wagner, A. Walcher, Th Weis, M. |
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