Threshold π0 photoproduction on transverse polarised protons at MAMI
Polarisation-dependent differential cross sections σT associated with the target asymmetry T have been measured for the reaction γp→→pπ0 with transverse target polarisation from π0 threshold to photon energies of 190 MeV. The data were obtained using a frozen-spin butanol target with the Crystal Bal...
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2015-11-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269315006905 |
| _version_ | 1818054999822827520 |
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| author | S. Schumann P.B. Otte C.S. Akondi J.R.M. Annand H.-J. Arends R. Beck A.M. Bernstein N. Borisov A. Braghieri W.J. Briscoe S. Cherepnya C. Collicott S. Costanza E.J. Downie M. Dieterle C. Fernández-Ramírez A. Fix L.V. Fil'kov S. Garni D.I. Glazier W. Gradl G. Gurevich P. Hall-Barrientos D. Hamilton D. Hornidge D. Howdle G.M. Huber V.L. Kashevarov I. Keshelashvili R. Kondratiev M. Korolija B. Krusche A. Lazarev V. Lisin K. Livingston I.J.D. MacGregor J. Mancel D.M. Manley P.P. Martel E.F. McNicoll W. Meyer D. Middleton R. Miskimen A. Mushkarenkov B.M.K. Nefkens A. Neganov A. Nikolaev M. Oberle M. Ostrick H. Ortega P. Ott B. Oussena D. Paudyal P. Pedroni A. Polonski V.V. Polyanski S. Prakhov G. Reicherz T. Rostomyan A. Sarty M.H. Sikora V. Sokhoyan O. Steffen I.I. Strakovsky Th. Strub I. Supek L. Tiator A. Thomas M. Unverzagt Yu.A. Usov D.P. Watts D. Werthmüller L. Witthauer M. Wolfes |
| author_facet | S. Schumann P.B. Otte C.S. Akondi J.R.M. Annand H.-J. Arends R. Beck A.M. Bernstein N. Borisov A. Braghieri W.J. Briscoe S. Cherepnya C. Collicott S. Costanza E.J. Downie M. Dieterle C. Fernández-Ramírez A. Fix L.V. Fil'kov S. Garni D.I. Glazier W. Gradl G. Gurevich P. Hall-Barrientos D. Hamilton D. Hornidge D. Howdle G.M. Huber V.L. Kashevarov I. Keshelashvili R. Kondratiev M. Korolija B. Krusche A. Lazarev V. Lisin K. Livingston I.J.D. MacGregor J. Mancel D.M. Manley P.P. Martel E.F. McNicoll W. Meyer D. Middleton R. Miskimen A. Mushkarenkov B.M.K. Nefkens A. Neganov A. Nikolaev M. Oberle M. Ostrick H. Ortega P. Ott B. Oussena D. Paudyal P. Pedroni A. Polonski V.V. Polyanski S. Prakhov G. Reicherz T. Rostomyan A. Sarty M.H. Sikora V. Sokhoyan O. Steffen I.I. Strakovsky Th. Strub I. Supek L. Tiator A. Thomas M. Unverzagt Yu.A. Usov D.P. Watts D. Werthmüller L. Witthauer M. Wolfes |
| author_sort | S. Schumann |
| collection | DOAJ |
| description | Polarisation-dependent differential cross sections σT associated with the target asymmetry T have been measured for the reaction γp→→pπ0 with transverse target polarisation from π0 threshold to photon energies of 190 MeV. The data were obtained using a frozen-spin butanol target with the Crystal Ball / TAPS detector set-up and the Glasgow photon tagging system at the Mainz Microtron MAMI. Results for σT have been used in combination with our previous measurements of the unpolarised cross section σ0 and the beam asymmetry Σ for a model-independent determination of S- and P-wave multipoles in the π0 threshold region, which includes for the first time a direct determination of the imaginary part of the E0+ multipole. |
| first_indexed | 2024-12-10T12:05:59Z |
| format | Article |
| id | doaj.art-ab6d77815759480eb86bc41776f569b7 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-12-10T12:05:59Z |
| publishDate | 2015-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-ab6d77815759480eb86bc41776f569b72022-12-22T01:49:28ZengElsevierPhysics Letters B0370-26931873-24452015-11-01750C25225810.1016/j.physletb.2015.09.015Threshold π0 photoproduction on transverse polarised protons at MAMIS. Schumann0P.B. Otte1C.S. Akondi2J.R.M. Annand3H.-J. Arends4R. Beck5A.M. Bernstein6N. Borisov7A. Braghieri8W.J. Briscoe9S. Cherepnya10C. Collicott11S. Costanza12E.J. Downie13M. Dieterle14C. Fernández-Ramírez15A. Fix16L.V. Fil'kov17S. Garni18D.I. Glazier19W. Gradl20G. Gurevich21P. Hall-Barrientos22D. Hamilton23D. Hornidge24D. Howdle25G.M. Huber26V.L. Kashevarov27I. Keshelashvili28R. Kondratiev29M. Korolija30B. Krusche31A. Lazarev32V. Lisin33K. Livingston34I.J.D. MacGregor35J. Mancel36D.M. Manley37P.P. Martel38E.F. McNicoll39W. Meyer40D. Middleton41R. Miskimen42A. Mushkarenkov43B.M.K. Nefkens44A. Neganov45A. Nikolaev46M. Oberle47M. Ostrick48H. Ortega49P. Ott50B. Oussena51D. Paudyal52P. Pedroni53A. Polonski54V.V. Polyanski55S. Prakhov56G. Reicherz57T. Rostomyan58A. Sarty59M.H. Sikora60V. Sokhoyan61O. Steffen62I.I. Strakovsky63Th. Strub64I. Supek65L. Tiator66A. Thomas67M. Unverzagt68Yu.A. Usov69D.P. Watts70D. Werthmüller71L. Witthauer72M. Wolfes73Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyKent State University, Kent, OH 44242-0001, USASUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyHelmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, GermanyMassachusetts Institute of Technology, Cambridge, MA 02139-4307, USAJoint Institute for Nuclear Research, 141980 Dubna, RussiaINFN Sezione di Pavia, 27100 Pavia PV, ItalyThe George Washington University, Washington, DC 20052-0001, USALebedev Physical Institute, 119991 Moscow, RussiaDepartment of Astronomy and Physics, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, CanadaINFN Sezione di Pavia, 27100 Pavia PV, ItalyInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyDepartement für Physik, Universität Basel, 4056 Basel, SwitzerlandJefferson Lab, Newport News, VA 23606, USALaboratory of Mathematical Physics, Tomsk Polytechnic University, 634034 Tomsk, RussiaLebedev Physical Institute, 119991 Moscow, RussiaDepartement für Physik, Universität Basel, 4056 Basel, SwitzerlandSUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United KingdomInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyInstitute for Nuclear Research, 125047 Moscow, RussiaSUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United KingdomSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomMount Allison University, Sackville, New Brunswick E4L 1E6, CanadaSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomUniversity of Regina, Regina, Saskatchewan S4S 0A2, CanadaInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyDepartement für Physik, Universität Basel, 4056 Basel, SwitzerlandInstitute for Nuclear Research, 125047 Moscow, RussiaRudjer Boskovic Institute, HR-10000 Zagreb, CroatiaDepartement für Physik, Universität Basel, 4056 Basel, SwitzerlandJoint Institute for Nuclear Research, 141980 Dubna, RussiaInstitute for Nuclear Research, 125047 Moscow, RussiaSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomKent State University, Kent, OH 44242-0001, USAUniversity of Massachusetts, Amherst, MA 01003, USASUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitut für Experimentalphysik, Ruhr-Universität, 44780 Bochum, GermanyMount Allison University, Sackville, New Brunswick E4L 1E6, CanadaUniversity of Massachusetts, Amherst, MA 01003, USAINFN Sezione di Pavia, 27100 Pavia PV, ItalyUniversity of California Los Angeles, Los Angeles, CA 90095-1547, USAJoint Institute for Nuclear Research, 141980 Dubna, RussiaHelmholtz-Institut für Strahlen- und Kernphysik, Universität Bonn, 53115 Bonn, GermanyDepartement für Physik, Universität Basel, 4056 Basel, SwitzerlandInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyUniversity of Regina, Regina, Saskatchewan S4S 0A2, CanadaINFN Sezione di Pavia, 27100 Pavia PV, ItalyInstitute for Nuclear Research, 125047 Moscow, RussiaLebedev Physical Institute, 119991 Moscow, RussiaUniversity of California Los Angeles, Los Angeles, CA 90095-1547, USAInstitut für Experimentalphysik, Ruhr-Universität, 44780 Bochum, GermanyDepartement für Physik, Universität Basel, 4056 Basel, SwitzerlandDepartment of Astronomy and Physics, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, CanadaSUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United KingdomInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyThe George Washington University, Washington, DC 20052-0001, USADepartement für Physik, Universität Basel, 4056 Basel, SwitzerlandRudjer Boskovic Institute, HR-10000 Zagreb, CroatiaInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyJoint Institute for Nuclear Research, 141980 Dubna, RussiaSUPA School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United KingdomSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomDepartement für Physik, Universität Basel, 4056 Basel, SwitzerlandInstitut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, GermanyPolarisation-dependent differential cross sections σT associated with the target asymmetry T have been measured for the reaction γp→→pπ0 with transverse target polarisation from π0 threshold to photon energies of 190 MeV. The data were obtained using a frozen-spin butanol target with the Crystal Ball / TAPS detector set-up and the Glasgow photon tagging system at the Mainz Microtron MAMI. Results for σT have been used in combination with our previous measurements of the unpolarised cross section σ0 and the beam asymmetry Σ for a model-independent determination of S- and P-wave multipoles in the π0 threshold region, which includes for the first time a direct determination of the imaginary part of the E0+ multipole.http://www.sciencedirect.com/science/article/pii/S0370269315006905Threshold π0 photoproductionTarget asymmetryElectromagnetic multipoles |
| spellingShingle | S. Schumann P.B. Otte C.S. Akondi J.R.M. Annand H.-J. Arends R. Beck A.M. Bernstein N. Borisov A. Braghieri W.J. Briscoe S. Cherepnya C. Collicott S. Costanza E.J. Downie M. Dieterle C. Fernández-Ramírez A. Fix L.V. Fil'kov S. Garni D.I. Glazier W. Gradl G. Gurevich P. Hall-Barrientos D. Hamilton D. Hornidge D. Howdle G.M. Huber V.L. Kashevarov I. Keshelashvili R. Kondratiev M. Korolija B. Krusche A. Lazarev V. Lisin K. Livingston I.J.D. MacGregor J. Mancel D.M. Manley P.P. Martel E.F. McNicoll W. Meyer D. Middleton R. Miskimen A. Mushkarenkov B.M.K. Nefkens A. Neganov A. Nikolaev M. Oberle M. Ostrick H. Ortega P. Ott B. Oussena D. Paudyal P. Pedroni A. Polonski V.V. Polyanski S. Prakhov G. Reicherz T. Rostomyan A. Sarty M.H. Sikora V. Sokhoyan O. Steffen I.I. Strakovsky Th. Strub I. Supek L. Tiator A. Thomas M. Unverzagt Yu.A. Usov D.P. Watts D. Werthmüller L. Witthauer M. Wolfes Threshold π0 photoproduction on transverse polarised protons at MAMI Physics Letters B Threshold π0 photoproduction Target asymmetry Electromagnetic multipoles |
| title | Threshold π0 photoproduction on transverse polarised protons at MAMI |
| title_full | Threshold π0 photoproduction on transverse polarised protons at MAMI |
| title_fullStr | Threshold π0 photoproduction on transverse polarised protons at MAMI |
| title_full_unstemmed | Threshold π0 photoproduction on transverse polarised protons at MAMI |
| title_short | Threshold π0 photoproduction on transverse polarised protons at MAMI |
| title_sort | threshold π0 photoproduction on transverse polarised protons at mami |
| topic | Threshold π0 photoproduction Target asymmetry Electromagnetic multipoles |
| url | http://www.sciencedirect.com/science/article/pii/S0370269315006905 |
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