Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead
The beam-helicity asymmetry was measured, for the first time, in photoproduction of π0η pairs on carbon, aluminum, and lead, with the A2 experimental setup at MAMI. The results are compared to an earlier measurement on a free proton and to the corresponding theoretical calculations. The Mainz model...
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2020-03-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320300472 |
| _version_ | 1819037957325062144 |
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| author | V. Sokhoyan S. Prakhov A. Fix S. Abt P. Achenbach P. Adlarson F. Afzal P. Aguar-Bartolomé Z. Ahmed K. Altangerel J.R.M. Annand H.J. Arends K. Bantawa M. Bashkanov R. Beck M. Biroth N.S. Borisov A. Braghieri W.J. Briscoe S. Cherepnya F. Cividini C. Collicott S. Costanza A. Denig M. Dieterle E.J. Downie P. Drexler M.I. Ferretti Bondy L.V. Fil'kov S. Gardner S. Garni D.I. Glazier I. Gorodnov W. Gradl M. Günther G.M. Gurevich L. Heijkenskjöld D. Hornidge G.M. Huber A. Käser V.L. Kashevarov S. Kay I. Keshelashvili R. Kondratiev M. Korolija B. Krusche A. Lazarev K. Livingston S. Lutterer I.J.D. MacGregor R. Macrae D.M. Manley P.P. Martel J.C. McGeorge D.G. Middleton R. Miskimen E. Mornacchi C. Mullen A. Mushkarenkov A. Neganov A. Neiser M. Oberle M. Ostrick P.B. Otte D. Paudyal P. Pedroni A. Powell E. Rickert G. Ron T. Rostomyan A. Sarty C. Sfienti K. Spieker O. Steffen I.I. Strakovsky B. Strandberg Th. Strub I. Supek A. Thiel M. Thiel A. Thomas M. Unverzagt Yu.A. Usov S. Wagner N.K. Walford D.P. Watts D. Werthmüller J. Wettig L. Witthauer M. Wolfes N. Zachariou |
| author_facet | V. Sokhoyan S. Prakhov A. Fix S. Abt P. Achenbach P. Adlarson F. Afzal P. Aguar-Bartolomé Z. Ahmed K. Altangerel J.R.M. Annand H.J. Arends K. Bantawa M. Bashkanov R. Beck M. Biroth N.S. Borisov A. Braghieri W.J. Briscoe S. Cherepnya F. Cividini C. Collicott S. Costanza A. Denig M. Dieterle E.J. Downie P. Drexler M.I. Ferretti Bondy L.V. Fil'kov S. Gardner S. Garni D.I. Glazier I. Gorodnov W. Gradl M. Günther G.M. Gurevich L. Heijkenskjöld D. Hornidge G.M. Huber A. Käser V.L. Kashevarov S. Kay I. Keshelashvili R. Kondratiev M. Korolija B. Krusche A. Lazarev K. Livingston S. Lutterer I.J.D. MacGregor R. Macrae D.M. Manley P.P. Martel J.C. McGeorge D.G. Middleton R. Miskimen E. Mornacchi C. Mullen A. Mushkarenkov A. Neganov A. Neiser M. Oberle M. Ostrick P.B. Otte D. Paudyal P. Pedroni A. Powell E. Rickert G. Ron T. Rostomyan A. Sarty C. Sfienti K. Spieker O. Steffen I.I. Strakovsky B. Strandberg Th. Strub I. Supek A. Thiel M. Thiel A. Thomas M. Unverzagt Yu.A. Usov S. Wagner N.K. Walford D.P. Watts D. Werthmüller J. Wettig L. Witthauer M. Wolfes N. Zachariou |
| author_sort | V. Sokhoyan |
| collection | DOAJ |
| description | The beam-helicity asymmetry was measured, for the first time, in photoproduction of π0η pairs on carbon, aluminum, and lead, with the A2 experimental setup at MAMI. The results are compared to an earlier measurement on a free proton and to the corresponding theoretical calculations. The Mainz model is used to predict the beam-helicity asymmetry for the nuclear targets. The present results indicate that the photoproduction mechanism for π0η pairs on nuclei is similar to photoproduction on a free nucleon. This process is dominated by the D33 partial wave with the ηΔ(1232) intermediate state. |
| first_indexed | 2024-12-21T08:29:40Z |
| format | Article |
| id | doaj.art-4672004e30f143adaaf9b16333941918 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-21T08:29:40Z |
| publishDate | 2020-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-4672004e30f143adaaf9b163339419182022-12-21T19:10:14ZengElsevierPhysics Letters B0370-26932020-03-01802Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and leadV. Sokhoyan0S. Prakhov1A. Fix2S. Abt3P. Achenbach4P. Adlarson5F. Afzal6P. Aguar-Bartolomé7Z. Ahmed8K. Altangerel9J.R.M. Annand10H.J. Arends11K. Bantawa12M. Bashkanov13R. Beck14M. Biroth15N.S. Borisov16A. Braghieri17W.J. Briscoe18S. Cherepnya19F. Cividini20C. Collicott21S. Costanza22A. Denig23M. Dieterle24E.J. Downie25P. Drexler26M.I. Ferretti Bondy27L.V. Fil'kov28S. Gardner29S. Garni30D.I. Glazier31I. Gorodnov32W. Gradl33M. Günther34G.M. Gurevich35L. Heijkenskjöld36D. Hornidge37G.M. Huber38A. Käser39V.L. Kashevarov40S. Kay41I. Keshelashvili42R. Kondratiev43M. Korolija44B. Krusche45A. Lazarev46K. Livingston47S. Lutterer48I.J.D. MacGregor49R. Macrae50D.M. Manley51P.P. Martel52J.C. McGeorge53D.G. Middleton54R. Miskimen55E. Mornacchi56C. Mullen57A. Mushkarenkov58A. Neganov59A. Neiser60M. Oberle61M. Ostrick62P.B. Otte63D. Paudyal64P. Pedroni65A. Powell66E. Rickert67G. Ron68T. Rostomyan69A. Sarty70C. Sfienti71K. Spieker72O. Steffen73I.I. Strakovsky74B. Strandberg75Th. Strub76I. Supek77A. Thiel78M. Thiel79A. Thomas80M. Unverzagt81Yu.A. Usov82S. Wagner83N.K. Walford84D.P. Watts85D. Werthmüller86J. Wettig87L. Witthauer88M. Wolfes89N. Zachariou90Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany; Corresponding author.Institut für Kernphysik, University of Mainz, D-55099 Mainz, Germany; University of California Los Angeles, Los Angeles, CA 90095-1547, USATomsk Polytechnic University, 634034 Tomsk, RussiaInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyHelmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyUniversity of Regina, Regina, Saskatchewan S4S 0A2, CanadaInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanySUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyKent State University, Kent, OH 44242-0001, USADepartment of Physics, University of York, Heslington, York, Y010 5DD, United KingdomHelmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyJoint Institute for Nuclear Research, 141980 Dubna, RussiaINFN Sezione di Pavia, I-27100 Pavia, ItalyThe George Washington University, Washington, DC 20052-0001, USALebedev Physical Institute, 119991 Moscow, RussiaInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyDalhousie University, Halifax, Nova Scotia B3H 4R2, Canada; Saint Mary's University, Halifax, Nova Scotia B3H 3C3, CanadaINFN Sezione di Pavia, I-27100 Pavia, Italy; Dipartimento di Fisica, Università di Pavia, I-27100 Pavia, ItalyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandThe George Washington University, Washington, DC 20052-0001, USAInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyLebedev Physical Institute, 119991 Moscow, RussiaSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom; Department of Physics, University of York, Heslington, York, Y010 5DD, United KingdomJoint Institute for Nuclear Research, 141980 Dubna, RussiaInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandInstitute for Nuclear Research, 125047 Moscow, RussiaInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyMount Allison University, Sackville, New Brunswick E4L 1E6, CanadaUniversity of Regina, Regina, Saskatchewan S4S 0A2, CanadaInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandInstitut für Kernphysik, University of Mainz, D-55099 Mainz, Germany; Joint Institute for Nuclear Research, 141980 Dubna, RussiaUniversity of Regina, Regina, Saskatchewan S4S 0A2, CanadaInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandInstitute for Nuclear Research, 125047 Moscow, RussiaRudjer Boskovic Institute, HR-10000 Zagreb, CroatiaInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandJoint Institute for Nuclear Research, 141980 Dubna, RussiaSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandSUPA 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, USAInstitut für Kernphysik, University of Mainz, D-55099 Mainz, Germany; Mount Allison University, Sackville, New Brunswick E4L 1E6, CanadaSUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitut für Kernphysik, University of Mainz, D-55099 Mainz, Germany; Mount Allison University, Sackville, New Brunswick E4L 1E6, CanadaUniversity of Massachusetts, Amherst, MA 01003, USAInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanySUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomINFN Sezione di Pavia, I-27100 Pavia, Italy; University of Massachusetts, Amherst, MA 01003, USAJoint Institute for Nuclear Research, 141980 Dubna, RussiaInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyUniversity of Regina, Regina, Saskatchewan S4S 0A2, CanadaINFN Sezione di Pavia, I-27100 Pavia, ItalySUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyRacah Institute of Physics, Hebrew University of Jerusalem, Jerusalem 91904, IsraelInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandSaint Mary's University, Halifax, Nova Scotia B3H 3C3, CanadaInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyHelmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyThe George Washington University, Washington, DC 20052-0001, USASUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United KingdomInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandRudjer Boskovic Institute, HR-10000 Zagreb, CroatiaHelmholtz-Institut für Strahlen- und Kernphysik, University of Bonn, D-53115 Bonn, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyJoint Institute for Nuclear Research, 141980 Dubna, RussiaInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandDepartment of Physics, University of York, Heslington, York, Y010 5DD, United KingdomDepartment of Physics, University of York, Heslington, York, Y010 5DD, United KingdomInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyInstitut für Physik, University of Basel, CH-4056 Basel, SwitzerlandInstitut für Kernphysik, University of Mainz, D-55099 Mainz, GermanyDepartment of Physics, University of York, Heslington, York, Y010 5DD, United KingdomThe beam-helicity asymmetry was measured, for the first time, in photoproduction of π0η pairs on carbon, aluminum, and lead, with the A2 experimental setup at MAMI. The results are compared to an earlier measurement on a free proton and to the corresponding theoretical calculations. The Mainz model is used to predict the beam-helicity asymmetry for the nuclear targets. The present results indicate that the photoproduction mechanism for π0η pairs on nuclei is similar to photoproduction on a free nucleon. This process is dominated by the D33 partial wave with the ηΔ(1232) intermediate state.http://www.sciencedirect.com/science/article/pii/S0370269320300472 |
| spellingShingle | V. Sokhoyan S. Prakhov A. Fix S. Abt P. Achenbach P. Adlarson F. Afzal P. Aguar-Bartolomé Z. Ahmed K. Altangerel J.R.M. Annand H.J. Arends K. Bantawa M. Bashkanov R. Beck M. Biroth N.S. Borisov A. Braghieri W.J. Briscoe S. Cherepnya F. Cividini C. Collicott S. Costanza A. Denig M. Dieterle E.J. Downie P. Drexler M.I. Ferretti Bondy L.V. Fil'kov S. Gardner S. Garni D.I. Glazier I. Gorodnov W. Gradl M. Günther G.M. Gurevich L. Heijkenskjöld D. Hornidge G.M. Huber A. Käser V.L. Kashevarov S. Kay I. Keshelashvili R. Kondratiev M. Korolija B. Krusche A. Lazarev K. Livingston S. Lutterer I.J.D. MacGregor R. Macrae D.M. Manley P.P. Martel J.C. McGeorge D.G. Middleton R. Miskimen E. Mornacchi C. Mullen A. Mushkarenkov A. Neganov A. Neiser M. Oberle M. Ostrick P.B. Otte D. Paudyal P. Pedroni A. Powell E. Rickert G. Ron T. Rostomyan A. Sarty C. Sfienti K. Spieker O. Steffen I.I. Strakovsky B. Strandberg Th. Strub I. Supek A. Thiel M. Thiel A. Thomas M. Unverzagt Yu.A. Usov S. Wagner N.K. Walford D.P. Watts D. Werthmüller J. Wettig L. Witthauer M. Wolfes N. Zachariou Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead Physics Letters B |
| title | Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead |
| title_full | Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead |
| title_fullStr | Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead |
| title_full_unstemmed | Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead |
| title_short | Measurement of the beam-helicity asymmetry in photoproduction of π0η pairs on carbon, aluminum, and lead |
| title_sort | measurement of the beam helicity asymmetry in photoproduction of π0η pairs on carbon aluminum and lead |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320300472 |
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