Physics Letters B (Nov 2015)
First measurement of the polarization observable E in the p→(γ→,π+)n reaction up to 2.25 GeV
- S. Strauch,
- W.J. Briscoe,
- M. Döring,
- E. Klempt,
- V.A. Nikonov,
- E. Pasyuk,
- D. Rönchen,
- A.V. Sarantsev,
- I. Strakovsky,
- R. Workman,
- K.P. Adhikari,
- D. Adikaram,
- M.D. Anderson,
- S. Anefalos Pereira,
- A.V. Anisovich,
- R.A. Badui,
- J. Ball,
- V. Batourine,
- M. Battaglieri,
- I. Bedlinskiy,
- N. Benmouna,
- A.S. Biselli,
- J. Brock,
- W.K. Brooks,
- V.D. Burkert,
- T. Cao,
- C. Carlin,
- D.S. Carman,
- A. Celentano,
- S. Chandavar,
- G. Charles,
- L. Colaneri,
- P.L. Cole,
- N. Compton,
- M. Contalbrigo,
- O. Cortes,
- V. Crede,
- N. Dashyan,
- A. D'Angelo,
- R. De Vita,
- E. De Sanctis,
- A. Deur,
- C. Djalali,
- M. Dugger,
- R. Dupre,
- H. Egiyan,
- A. El Alaoui,
- L. El Fassi,
- L. Elouadrhiri,
- P. Eugenio,
- G. Fedotov,
- S. Fegan,
- A. Filippi,
- J.A. Fleming,
- T.A. Forest,
- A. Fradi,
- N. Gevorgyan,
- Y. Ghandilyan,
- K.L. Giovanetti,
- F.X. Girod,
- D.I. Glazier,
- W. Gohn,
- E. Golovatch,
- R.W. Gothe,
- K.A. Griffioen,
- M. Guidal,
- L. Guo,
- K. Hafidi,
- H. Hakobyan,
- C. Hanretty,
- N. Harrison,
- M. Hattawy,
- K. Hicks,
- D. Ho,
- M. Holtrop,
- S.M. Hughes,
- Y. Ilieva,
- D.G. Ireland,
- B.S. Ishkhanov,
- E.L. Isupov,
- D. Jenkins,
- H. Jiang,
- H.S. Jo,
- K. Joo,
- S. Joosten,
- C.D. Keith,
- D. Keller,
- G. Khachatryan,
- M. Khandaker,
- A. Kim,
- W. Kim,
- A. Klein,
- F.J. Klein,
- V. Kubarovsky,
- S.E. Kuhn,
- P. Lenisa,
- K. Livingston,
- H.Y. Lu,
- I.J.D. MacGregor,
- N. Markov,
- B. McKinnon,
- D.G. Meekins,
- C.A. Meyer,
- V. Mokeev,
- R.A. Montgomery,
- C.I. Moody,
- H. Moutarde,
- A. Movsisyan,
- E. Munevar,
- C. Munoz Camacho,
- P. Nadel-Turonski,
- L.A. Net,
- S. Niccolai,
- G. Niculescu,
- I. Niculescu,
- G. O'Rielly,
- M. Osipenko,
- A.I. Ostrovidov,
- K. Park,
- P. Peng,
- W. Phelps,
- J.J. Phillips,
- S. Pisano,
- O. Pogorelko,
- S. Pozdniakov,
- J.W. Price,
- S. Procureur,
- Y. Prok,
- D. Protopopescu,
- A.J.R. Puckett,
- B.A. Raue,
- M. Ripani,
- B.G. Ritchie,
- A. Rizzo,
- G. Rosner,
- P. Roy,
- F. Sabatié,
- C. Salgado,
- D. Schott,
- R.A. Schumacher,
- E. Seder,
- M.L. Seely,
- I. Senderovich,
- Y.G. Sharabian,
- A. Simonyan,
- Iu. Skorodumina,
- G.D. Smith,
- D.I. Sober,
- D. Sokhan,
- N. Sparveris,
- P. Stoler,
- S. Stepanyan,
- V. Sytnik,
- M. Taiuti,
- Ye Tian,
- A. Trivedi,
- R. Tucker,
- M. Ungaro,
- H. Voskanyan,
- E. Voutier,
- N.K. Walford,
- D.P. Watts,
- X. Wei,
- M.H. Wood,
- N. Zachariou,
- L. Zana,
- J. Zhang,
- Z.W. Zhao,
- I. Zonta
Affiliations
- S. Strauch
- University of South Carolina, Columbia, SC 29208, USA
- W.J. Briscoe
- The George Washington University, Washington, DC 20052, USA
- M. Döring
- The George Washington University, Washington, DC 20052, USA
- E. Klempt
- Universität Bonn, 53115 Bonn, Germany
- V.A. Nikonov
- Universität Bonn, 53115 Bonn, Germany
- E. Pasyuk
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- D. Rönchen
- Universität Bonn, 53115 Bonn, Germany
- A.V. Sarantsev
- Universität Bonn, 53115 Bonn, Germany
- I. Strakovsky
- The George Washington University, Washington, DC 20052, USA
- R. Workman
- The George Washington University, Washington, DC 20052, USA
- K.P. Adhikari
- Old Dominion University, Norfolk, VA 23529, USA
- D. Adikaram
- Old Dominion University, Norfolk, VA 23529, USA
- M.D. Anderson
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- S. Anefalos Pereira
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- A.V. Anisovich
- Universität Bonn, 53115 Bonn, Germany
- R.A. Badui
- Florida International University, Miami, FL 33199, USA
- J. Ball
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
- V. Batourine
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M. Battaglieri
- INFN, Sezione di Genova, 16146 Genova, Italy
- I. Bedlinskiy
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
- N. Benmouna
- Montgomery College, Rockville, MD 20850, USA
- A.S. Biselli
- Fairfield University, Fairfield, CT 06824, USA
- J. Brock
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- W.K. Brooks
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
- V.D. Burkert
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- T. Cao
- University of South Carolina, Columbia, SC 29208, USA
- C. Carlin
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- D.S. Carman
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- A. Celentano
- INFN, Sezione di Genova, 16146 Genova, Italy
- S. Chandavar
- Ohio University, Athens, OH 45701, USA
- G. Charles
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- L. Colaneri
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
- P.L. Cole
- Idaho State University, Pocatello, ID 83209, USA
- N. Compton
- Ohio University, Athens, OH 45701, USA
- M. Contalbrigo
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- O. Cortes
- Idaho State University, Pocatello, ID 83209, USA
- V. Crede
- Florida State University, Tallahassee, FL 32306, USA
- N. Dashyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- A. D'Angelo
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
- R. De Vita
- INFN, Sezione di Genova, 16146 Genova, Italy
- E. De Sanctis
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- A. Deur
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- C. Djalali
- University of South Carolina, Columbia, SC 29208, USA
- M. Dugger
- Arizona State University, Tempe, AZ 85287-1504, USA
- R. Dupre
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- H. Egiyan
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- A. El Alaoui
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
- L. El Fassi
- Old Dominion University, Norfolk, VA 23529, USA
- L. Elouadrhiri
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- P. Eugenio
- Florida State University, Tallahassee, FL 32306, USA
- G. Fedotov
- University of South Carolina, Columbia, SC 29208, USA
- S. Fegan
- INFN, Sezione di Genova, 16146 Genova, Italy
- A. Filippi
- INFN, Sezione di Torino, 10125 Torino, Italy
- J.A. Fleming
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
- T.A. Forest
- Idaho State University, Pocatello, ID 83209, USA
- A. Fradi
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- N. Gevorgyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- Y. Ghandilyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- K.L. Giovanetti
- James Madison University, Harrisonburg, VA 22807, USA
- F.X. Girod
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- D.I. Glazier
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- W. Gohn
- University of Connecticut, Storrs, CT 06269, USA
- E. Golovatch
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
- R.W. Gothe
- University of South Carolina, Columbia, SC 29208, USA
- K.A. Griffioen
- College of William and Mary, Williamsburg, VA 23187-8795, USA
- M. Guidal
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- L. Guo
- Florida International University, Miami, FL 33199, USA
- K. Hafidi
- Argonne National Laboratory, Argonne, IL 60439, USA
- H. Hakobyan
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
- C. Hanretty
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- N. Harrison
- University of Connecticut, Storrs, CT 06269, USA
- M. Hattawy
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- K. Hicks
- Ohio University, Athens, OH 45701, USA
- D. Ho
- Carnegie Mellon University, Pittsburgh, PA 15213, USA
- M. Holtrop
- University of New Hampshire, Durham, NH 03824-3568, USA
- S.M. Hughes
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
- Y. Ilieva
- University of South Carolina, Columbia, SC 29208, USA
- D.G. Ireland
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- B.S. Ishkhanov
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
- E.L. Isupov
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
- D. Jenkins
- Virginia Tech, Blacksburg, VA 24061-0435, USA
- H. Jiang
- University of South Carolina, Columbia, SC 29208, USA
- H.S. Jo
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- K. Joo
- University of Connecticut, Storrs, CT 06269, USA
- S. Joosten
- Temple University, Philadelphia, PA 19122, USA
- C.D. Keith
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- D. Keller
- University of Virginia, Charlottesville, VA 22901, USA
- G. Khachatryan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- M. Khandaker
- Idaho State University, Pocatello, ID 83209, USA
- A. Kim
- University of Connecticut, Storrs, CT 06269, USA
- W. Kim
- Kyungpook National University, Daegu 702-701, Republic of Korea
- A. Klein
- Old Dominion University, Norfolk, VA 23529, USA
- F.J. Klein
- Catholic University of America, Washington DC 20064, USA
- V. Kubarovsky
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- S.E. Kuhn
- Old Dominion University, Norfolk, VA 23529, USA
- P. Lenisa
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- K. Livingston
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- H.Y. Lu
- University of South Carolina, Columbia, SC 29208, USA
- I.J.D. MacGregor
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- N. Markov
- University of Connecticut, Storrs, CT 06269, USA
- B. McKinnon
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- D.G. Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- C.A. Meyer
- Carnegie Mellon University, Pittsburgh, PA 15213, USA
- V. Mokeev
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- R.A. Montgomery
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- C.I. Moody
- Argonne National Laboratory, Argonne, IL 60439, USA
- H. Moutarde
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
- A. Movsisyan
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- E. Munevar
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- C. Munoz Camacho
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- P. Nadel-Turonski
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- L.A. Net
- University of South Carolina, Columbia, SC 29208, USA
- S. Niccolai
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- G. Niculescu
- James Madison University, Harrisonburg, VA 22807, USA
- I. Niculescu
- James Madison University, Harrisonburg, VA 22807, USA
- G. O'Rielly
- University of Massachusetts Dartmouth, Dartmouth, MA 02747, USA
- M. Osipenko
- INFN, Sezione di Genova, 16146 Genova, Italy
- A.I. Ostrovidov
- Florida State University, Tallahassee, FL 32306, USA
- K. Park
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- P. Peng
- University of Virginia, Charlottesville, VA 22901, USA
- W. Phelps
- Florida International University, Miami, FL 33199, USA
- J.J. Phillips
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- S. Pisano
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- O. Pogorelko
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
- S. Pozdniakov
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
- J.W. Price
- California State University, Dominguez Hills, Carson, CA 90747, USA
- S. Procureur
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
- Y. Prok
- Old Dominion University, Norfolk, VA 23529, USA
- D. Protopopescu
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- A.J.R. Puckett
- University of Connecticut, Storrs, CT 06269, USA
- B.A. Raue
- Florida International University, Miami, FL 33199, USA
- M. Ripani
- INFN, Sezione di Genova, 16146 Genova, Italy
- B.G. Ritchie
- Arizona State University, Tempe, AZ 85287-1504, USA
- A. Rizzo
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
- G. Rosner
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- P. Roy
- Florida State University, Tallahassee, FL 32306, USA
- F. Sabatié
- CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
- C. Salgado
- Norfolk State University, Norfolk, VA 23504, USA
- D. Schott
- The George Washington University, Washington, DC 20052, USA
- R.A. Schumacher
- Carnegie Mellon University, Pittsburgh, PA 15213, USA
- E. Seder
- University of Connecticut, Storrs, CT 06269, USA
- M.L. Seely
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- I. Senderovich
- Arizona State University, Tempe, AZ 85287-1504, USA
- Y.G. Sharabian
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- A. Simonyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- Iu. Skorodumina
- University of South Carolina, Columbia, SC 29208, USA
- G.D. Smith
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
- D.I. Sober
- Catholic University of America, Washington DC 20064, USA
- D. Sokhan
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- N. Sparveris
- Temple University, Philadelphia, PA 19122, USA
- P. Stoler
- Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA
- S. Stepanyan
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- V. Sytnik
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
- M. Taiuti
- Università di Genova, 16146 Genova, Italy
- Ye Tian
- University of South Carolina, Columbia, SC 29208, USA
- A. Trivedi
- University of South Carolina, Columbia, SC 29208, USA
- R. Tucker
- Arizona State University, Tempe, AZ 85287-1504, USA
- M. Ungaro
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- H. Voskanyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- E. Voutier
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- N.K. Walford
- Catholic University of America, Washington DC 20064, USA
- D.P. Watts
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
- X. Wei
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M.H. Wood
- Canisius College, Buffalo, NY, USA
- N. Zachariou
- University of South Carolina, Columbia, SC 29208, USA
- L. Zana
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
- J. Zhang
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- Z.W. Zhao
- Old Dominion University, Norfolk, VA 23529, USA
- I. Zonta
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy
- DOI
- https://doi.org/10.1016/j.physletb.2015.08.053
- Journal volume & issue
-
Vol. 750,
no. C
pp. 53 – 58
Abstract
First results from the longitudinally polarized frozen-spin target (FROST) program are reported. The double-polarization observable E, for the reaction γ→p→→π+n, has been measured using a circularly polarized tagged-photon beam, with energies from 0.35 to 2.37 GeV. The final-state pions were detected with the CEBAF Large Acceptance Spectrometer in Hall B at the Thomas Jefferson National Accelerator Facility. These polarization data agree fairly well with previous partial-wave analyses at low photon energies. Over much of the covered energy range, however, significant deviations are observed, particularly in the high-energy region where high-L multipoles contribute. The data have been included in new multipole analyses resulting in updated nucleon resonance parameters. We report updated fits from the Bonn–Gatchina, Jülich–Bonn, and SAID groups.
Keywords
