Physics Letters B (Apr 2016)
First measurement of the helicity asymmetry E in η photoproduction on the proton
- I. Senderovich,
- B.T. Morrison,
- M. Dugger,
- B.G. Ritchie,
- E. Pasyuk,
- R. Tucker,
- J. Brock,
- C. Carlin,
- C.D. Keith,
- D.G. Meekins,
- M.L. Seely,
- D. Rönchen,
- M. Döring,
- P. Collins,
- K.P. Adhikari,
- D. Adikaram,
- Z. Akbar,
- M.D. Anderson,
- S. Anefalos Pereira,
- R.A. Badui,
- J. Ball,
- N.A. Baltzell,
- M. Battaglieri,
- V. Batourine,
- I. Bedlinskiy,
- A.S. Biselli,
- S. Boiarinov,
- W.J. Briscoe,
- W.K. Brooks,
- V.D. Burkert,
- D.S. Carman,
- A. Celentano,
- S. Chandavar,
- G. Charles,
- L. Colaneri,
- P.L. Cole,
- M. Contalbrigo,
- O. Cortes,
- V. Credé,
- A. D'Angelo,
- N. Dashyan,
- R. De Vita,
- E. De Sanctis,
- A. Deur,
- C. Djalali,
- R. Dupre,
- H. Egiyan,
- A. El Alaoui,
- L. El Fassi,
- L. Elouadrhiri,
- P. Eugenio,
- G. Fedotov,
- S. Fegan,
- A. Filippi,
- J.A. Fleming,
- A. Fradi,
- B. Garillon,
- Y. Ghandilyan,
- G.P. Gilfoyle,
- K.L. Giovanetti,
- F.X. Girod,
- D.I. Glazier,
- J.T. Goetz,
- W. Gohn,
- E. Golovatch,
- R.W. Gothe,
- K.A. Griffioen,
- M. Guidal,
- L. Guo,
- K. Hafidi,
- H. Hakobyan,
- C. Hanretty,
- M. Hattawy,
- K. Hicks,
- D. Ho,
- M. Holtrop,
- S.M. Hughes,
- Y. Ilieva,
- D.G. Ireland,
- B.S. Ishkhanov,
- D. Jenkins,
- H. Jiang,
- H.S. Jo,
- K. Joo,
- S. Joosten,
- D. Keller,
- G. Khachatryan,
- M. Khandaker,
- A. Kim,
- F.J. Klein,
- V. Kubarovsky,
- M.C. Kunkel,
- P. Lenisa,
- K. Livingston,
- H.Y. Lu,
- I.J.D. MacGregor,
- P. Mattione,
- B. McKinnon,
- C.A. Meyer,
- T. Mineeva,
- V. Mokeev,
- R.A. Montgomery,
- A. Movsisyan,
- C. Munoz Camacho,
- P. Nadel-Turonski,
- L.A. Net,
- S. Niccolai,
- G. Niculescu,
- I. Niculescu,
- M. Osipenko,
- K. Park,
- S. Park,
- P. Peng,
- W. Phelps,
- S. Pisano,
- O. Pogorelko,
- J.W. Price,
- Y. Prok,
- A.J.R. Puckett,
- M. Ripani,
- A. Rizzo,
- G. Rosner,
- P. Roy,
- F. Sabatié,
- C. Salgado,
- D. Schott,
- R.A. Schumacher,
- E. Seder,
- A. Simonyan,
- Iu. Skorodumina,
- G.D. Smith,
- D.I. Sober,
- N. Sparveris,
- S. Stepanyan,
- P. Stoler,
- I.I. Strakovsky,
- S. Strauch,
- V. Sytnik,
- Ye Tian,
- M. Ungaro,
- H. Voskanyan,
- E. Voutier,
- N.K. Walford,
- X. Wei,
- M.H. Wood,
- N. Zachariou,
- L. Zana,
- J. Zhang,
- Z.W. Zhao,
- I. Zonta
Affiliations
- I. Senderovich
- Arizona State University, Tempe, AR 85287-1504, USA
- B.T. Morrison
- Arizona State University, Tempe, AR 85287-1504, USA
- M. Dugger
- Arizona State University, Tempe, AR 85287-1504, USA
- B.G. Ritchie
- Arizona State University, Tempe, AR 85287-1504, USA; Corresponding author.
- E. Pasyuk
- Arizona State University, Tempe, AR 85287-1504, USA
- R. Tucker
- Arizona State University, Tempe, AR 85287-1504, USA
- J. Brock
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- C. Carlin
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- C.D. Keith
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- D.G. Meekins
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M.L. Seely
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- D. Rönchen
- HISKP and BCTP, Universität Bonn, 53115 Bonn, Germany
- M. Döring
- The George Washington University, Washington, DC 20052, USA; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- P. Collins
- Arizona State University, Tempe, AR 85287-1504, USA; Catholic University of America, Washington, DC 20064, USA
- K.P. Adhikari
- Old Dominion University, Norfolk, VA 23529, USA
- D. Adikaram
- Old Dominion University, Norfolk, VA 23529, USA
- Z. Akbar
- Florida State University, Tallahassee, FL 32306, USA
- M.D. Anderson
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- S. Anefalos Pereira
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- 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
- N.A. Baltzell
- Argonne National Laboratory, Argonne, IL 60439, USA; University of South Carolina, Columbia, SC 29208, USA
- M. Battaglieri
- INFN, Sezione di Genova, 16146 Genova, Italy
- V. Batourine
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- I. Bedlinskiy
- Institute of Theoretical and Experimental Physics, Moscow 117259, Russia
- A.S. Biselli
- Fairfield University, Fairfield, CT 06824, USA
- S. Boiarinov
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- W.J. Briscoe
- The George Washington University, Washington, DC 20052, USA
- W.K. Brooks
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- V.D. Burkert
- 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; Universita' di Roma Tor Vergata, 00133 Rome, Italy
- P.L. Cole
- Idaho State University, Pocatello, ID 83209, USA
- M. Contalbrigo
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- O. Cortes
- Idaho State University, Pocatello, ID 83209, USA
- V. Credé
- Florida State University, Tallahassee, FL 32306, USA
- A. D'Angelo
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy; Universita' di Roma Tor Vergata, 00133 Rome, Italy
- N. Dashyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- 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
- 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; University of New Hampshire, Durham, NH 03824-3568, 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; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
- 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
- A. Fradi
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- B. Garillon
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- Y. Ghandilyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- G.P. Gilfoyle
- University of Richmond, Richmond, VA 23173, USA
- K.L. Giovanetti
- James Madison University, Harrisonburg, VA 22807, USA
- F.X. Girod
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; CEA, Centre de Saclay, Irfu/Service de Physique Nucléaire, 91191 Gif-sur-Yvette, France
- D.I. Glazier
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- J.T. Goetz
- Ohio University, Athens, OH 45701, USA
- 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; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- K. Hafidi
- Argonne National Laboratory, Argonne, IL 60439, USA
- H. Hakobyan
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile; Yerevan Physics Institute, 375036 Yerevan, Armenia
- C. Hanretty
- University of Virginia, Charlottesville, VA 22901, USA; Florida State University, Tallahassee, FL 32306, 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; The George Washington University, Washington, DC 20052, 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
- 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
- D. Keller
- University of Virginia, Charlottesville, VA 22901, USA; Ohio University, Athens, OH 45701, USA
- G. Khachatryan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- M. Khandaker
- Idaho State University, Pocatello, ID 83209, USA; Norfolk State University, Norfolk, VA 23504, USA
- A. Kim
- University of Connecticut, Storrs, CT 06269, USA
- F.J. Klein
- Catholic University of America, Washington, DC 20064, USA
- V. Kubarovsky
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M.C. Kunkel
- Forschungszentrum Jülich, Institut für Kernphysik, 52425 Jülich, Germany
- 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
- P. Mattione
- Carnegie Mellon University, Pittsburgh, PA 15213, USA
- B. McKinnon
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- C.A. Meyer
- Carnegie Mellon University, Pittsburgh, PA 15213, USA
- T. Mineeva
- University of Waterloo, Institute for Quantum Computing, Waterloo, Ontario, Canada
- V. Mokeev
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
- R.A. Montgomery
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- A. Movsisyan
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- 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; Catholic University of America, Washington, DC 20064, USA; The George Washington University, Washington, DC 20052, 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
- M. Osipenko
- INFN, Sezione di Genova, 16146 Genova, Italy
- K. Park
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; University of South Carolina, Columbia, SC 29208, USA; Kyungpook National University, Daegu 702-701, Republic of Korea
- S. Park
- Florida State University, Tallahassee, FL 32306, USA
- P. Peng
- University of Virginia, Charlottesville, VA 22901, USA
- W. Phelps
- Florida International University, Miami, FL 33199, USA
- S. Pisano
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- O. Pogorelko
- Institute of Theoretical and Experimental Physics, Moscow 117259, Russia
- J.W. Price
- California State University, Dominguez Hills, Carson, CA 90747, USA
- Y. Prok
- Old Dominion University, Norfolk, VA 23529, USA; University of Virginia, Charlottesville, VA 22901, USA
- A.J.R. Puckett
- University of Connecticut, Storrs, CT 06269, USA
- M. Ripani
- INFN, Sezione di Genova, 16146 Genova, Italy
- A. Rizzo
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy; Universita' 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; Florida International University, Miami, FL 33199, USA
- R.A. Schumacher
- Carnegie Mellon University, Pittsburgh, PA 15213, USA
- E. Seder
- University of Connecticut, Storrs, CT 06269, USA
- A. Simonyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- Iu. Skorodumina
- University of South Carolina, Columbia, SC 29208, USA; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
- G.D. Smith
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
- D.I. Sober
- Catholic University of America, Washington, DC 20064, USA
- N. Sparveris
- Temple University, Philadelphia, PA 19122, USA
- S. Stepanyan
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- P. Stoler
- Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA
- I.I. Strakovsky
- The George Washington University, Washington, DC 20052, USA
- S. Strauch
- University of South Carolina, Columbia, SC 29208, USA
- V. Sytnik
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
- Ye Tian
- University of South Carolina, Columbia, SC 29208, USA
- M. Ungaro
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; University of Connecticut, Storrs, CT 06269, 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
- X. Wei
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M.H. Wood
- Canisius College, Buffalo, NY, USA; University of South Carolina, Columbia, SC 29208, USA
- N. Zachariou
- University of South Carolina, Columbia, SC 29208, USA
- L. Zana
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom; University of New Hampshire, Durham, NH 03824-3568, USA
- J. Zhang
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; Old Dominion University, Norfolk, VA 23529, USA
- Z.W. Zhao
- Old Dominion University, Norfolk, VA 23529, USA; University of South Carolina, Columbia, SC 29208, USA; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- I. Zonta
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy; Universita' di Roma Tor Vergata, 00133 Rome, Italy
- Journal volume & issue
-
Vol. 755
pp. 64 – 69
Abstract
Results are presented for the first measurement of the double-polarization helicity asymmetry E for the η photoproduction reaction γp→ηp. Data were obtained using the FROzen Spin Target (FROST) with the CLAS spectrometer in Hall B at Jefferson Lab, covering a range of center-of-mass energy W from threshold to 2.15 GeV and a large range in center-of-mass polar angle. As an initial application of these data, the results have been incorporated into the Jülich–Bonn model to examine the case for the existence of a narrow N⁎ resonance between 1.66 and 1.70 GeV. The addition of these data to the world database results in marked changes in the predictions for the E observable from that model. Further comparison with several theoretical approaches indicates these data will significantly enhance our understanding of nucleon resonances. Keywords: Eta photoproduction, Polarization observable, Helicity asymmetry
