Physics Letters B (May 2018)
Hard exclusive pion electroproduction at backward angles with CLAS
- K. Park,
- M. Guidal,
- R.W. Gothe,
- B. Pire,
- K. Semenov-Tian-Shansky,
- J.-M. Laget,
- K.P. Adhikari,
- S. Adhikari,
- Z. Akbar,
- H. Avakian,
- J. Ball,
- I. Balossino,
- N.A. Baltzell,
- L. Barion,
- M. Battaglieri,
- I. Bedlinskiy,
- A.S. Biselli,
- W.J. Briscoe,
- W.K. Brooks,
- V.D. Burkert,
- F.T. Cao,
- D.S. Carman,
- A. Celentano,
- G. Charles,
- T. Chetry,
- G. Ciullo,
- L. Clark,
- P.L. Cole,
- M. Contalbrigo,
- V. Crede,
- A. D'Angelo,
- N. Dashyan,
- R. De Vita,
- E. De Sanctis,
- M. Defurne,
- A. Deur,
- C. Djalali,
- R. Dupre,
- H. Egiyan,
- A. El Alaoui,
- L. El Fassi,
- L. Elouadrhiri,
- P. Eugenio,
- G. Fedotov,
- R. Fersch,
- A. Filippi,
- M. Garçon,
- Y. Ghandilyan,
- G.P. Gilfoyle,
- F.X. Girod,
- E. Golovatch,
- K.A. Griffioen,
- L. Guo,
- K. Hafidi,
- H. Hakobyan,
- C. Hanretty,
- N. Harrison,
- M. Hattawy,
- D. Heddle,
- K. Hicks,
- M. Holtrop,
- C.E. Hyde,
- Y. Ilieva,
- D.G. Ireland,
- B.S. Ishkhanov,
- E.L. Isupov,
- D. Jenkins,
- S. Johnston,
- K. Joo,
- M.L. Kabir,
- D. Keller,
- G. Khachatryan,
- M. Khachatryan,
- M. Khandaker,
- W. Kim,
- F.J. Klein,
- V. Kubarovsky,
- S.E. Kuhn,
- L. Lanza,
- K. Livingston,
- I.J.D. MacGregor,
- N. Markov,
- B. McKinnon,
- M. Mirazita,
- V. Mokeev,
- R.A. Montgomery,
- C. Munoz Camacho,
- P. Nadel-Turonski,
- S. Niccolai,
- G. Niculescu,
- M. Osipenko,
- M. Paolone,
- R. Paremuzyan,
- E. Pasyuk,
- W. Phelps,
- O. Pogorelko,
- J. Poudel,
- J.W. Price,
- Y. Prok,
- D. Protopopescu,
- M. Ripani,
- A. Rizzo,
- P. Rossi,
- F. Sabatié,
- C. Salgado,
- R.A. Schumacher,
- Y. Sharabian,
- Iu. Skorodumina,
- G.D. Smith,
- D. Sokhan,
- N. Sparveris,
- S. Stepanyan,
- I.I. Strakovsky,
- S. Strauch,
- M. Taiuti,
- J.A. Tan,
- M. Ungaro,
- H. Voskanyan,
- E. Voutier,
- X. Wei,
- N. Zachariou,
- J. Zhang
Affiliations
- K. Park
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; Corresponding author.
- M. Guidal
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- R.W. Gothe
- University of South Carolina, Columbia, SC 29208, USA
- B. Pire
- Centre de physique théorique, École Polytechnique, CNRS, F-91128 Palaiseau, France
- K. Semenov-Tian-Shansky
- National Research Centre Kurchatov Institute, Petersburg Nuclear Physics Institute, RU-188300 Gatchina, Russia
- J.-M. Laget
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- K.P. Adhikari
- Mississippi State University, Mississippi State, MS 39762-5167, USA
- S. Adhikari
- Florida International University, Miami, FL 33199, USA
- Z. Akbar
- Florida State University, Tallahassee, FL 32306, USA
- H. Avakian
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- J. Ball
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- I. Balossino
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- N.A. Baltzell
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- L. Barion
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- M. Battaglieri
- INFN, Sezione di Genova, 16146 Genova, Italy
- I. Bedlinskiy
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
- A.S. Biselli
- Fairfield University, Fairfield CT 06824, USA; Rensselaer Polytechnic Institute, Troy, NY 12180-3590, 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
- V.D. Burkert
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- F.T. Cao
- University of Connecticut, Storrs, CT 06269, USA
- D.S. Carman
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- A. Celentano
- INFN, Sezione di Genova, 16146 Genova, Italy
- G. Charles
- Old Dominion University, Norfolk, VA 23529, USA
- T. Chetry
- Ohio University, Athens, OH 45701, USA
- G. Ciullo
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy; Universita' di Ferrara, 44121 Ferrara, Italy
- L. Clark
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- P.L. Cole
- Idaho State University, Pocatello, ID 83209, USA; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M. Contalbrigo
- INFN, Sezione di Ferrara, 44100 Ferrara, Italy
- V. Crede
- 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
- M. Defurne
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- 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
- A. El Alaoui
- Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile
- L. El Fassi
- Mississippi State University, Mississippi State, MS 39762-5167, USA
- L. Elouadrhiri
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- P. Eugenio
- Florida State University, Tallahassee, FL 32306, USA
- G. Fedotov
- Ohio University, Athens, OH 45701, USA
- R. Fersch
- Christopher Newport University, Newport News, VA 23606, USA
- A. Filippi
- INFN, Sezione di Torino, 10125 Torino, Italy
- M. Garçon
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- Y. Ghandilyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- G.P. Gilfoyle
- University of Richmond, Richmond, VA 23173, USA
- F.X. Girod
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- E. Golovatch
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
- K.A. Griffioen
- College of William and Mary, Williamsburg, VA 23187-8795, USA
- 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
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- N. Harrison
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M. Hattawy
- Argonne National Laboratory, Argonne, IL 60439, USA
- D. Heddle
- Christopher Newport University, Newport News, VA 23606, USA; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- K. Hicks
- Ohio University, Athens, OH 45701, USA
- M. Holtrop
- University of New Hampshire, Durham, NH 03824-3568, USA
- C.E. Hyde
- Old Dominion University, Norfolk, VA 23529, USA
- 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
- E.L. Isupov
- Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia
- D. Jenkins
- Virginia Tech, Blacksburg, VA 24061-0435, USA
- S. Johnston
- Argonne National Laboratory, Argonne, IL 60439, USA
- K. Joo
- University of Connecticut, Storrs, CT 06269, USA; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- M.L. Kabir
- Mississippi State University, Mississippi State, MS 39762-5167, USA
- D. Keller
- University of Virginia, Charlottesville, VA 22901, USA
- G. Khachatryan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- M. Khachatryan
- Old Dominion University, Norfolk, VA 23529, USA
- M. Khandaker
- Norfolk State University, Norfolk, VA 23504, USA
- W. Kim
- Kyungpook National University, Daegu 41566, Republic of Korea
- 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
- L. Lanza
- INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy; Universita' di Roma Tor Vergata, 00133 Rome, Italy
- K. Livingston
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- 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
- M. Mirazita
- INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- V. Mokeev
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- R.A. Montgomery
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- 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
- S. Niccolai
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- G. Niculescu
- James Madison University, Harrisonburg, VA 22807, USA; Ohio University, Athens, OH 45701, USA
- M. Osipenko
- INFN, Sezione di Genova, 16146 Genova, Italy
- M. Paolone
- Temple University, Philadelphia, PA 19122, USA
- R. Paremuzyan
- University of New Hampshire, Durham, NH 03824-3568, USA
- E. Pasyuk
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- W. Phelps
- Florida International University, Miami, FL 33199, USA
- O. Pogorelko
- Institute of Theoretical and Experimental Physics, Moscow, 117259, Russia
- J. Poudel
- Old Dominion University, Norfolk, VA 23529, USA
- 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
- D. Protopopescu
- University of New Hampshire, Durham, NH 03824-3568, 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
- P. Rossi
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy
- F. Sabatié
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- C. Salgado
- Norfolk State University, Norfolk, VA 23504, USA
- R.A. Schumacher
- Carnegie Mellon University, Pittsburgh, PA 15213, USA
- Y. Sharabian
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- 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. Sokhan
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
- N. Sparveris
- Temple University, Philadelphia, PA 19122, USA
- S. Stepanyan
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- I.I. Strakovsky
- The George Washington University, Washington, DC 20052, USA
- S. Strauch
- University of South Carolina, Columbia, SC 29208, USA; The George Washington University, Washington, DC 20052, USA
- M. Taiuti
- Università di Genova, 16146 Genova, Italy
- J.A. Tan
- Kyungpook National University, Daegu 41566, Republic of Korea
- M. Ungaro
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA; Rensselaer Polytechnic Institute, Troy, NY 12180-3590, USA
- H. Voskanyan
- Yerevan Physics Institute, 375036 Yerevan, Armenia
- E. Voutier
- Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France
- X. Wei
- Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, USA
- N. Zachariou
- Edinburgh University, Edinburgh EH9 3JZ, United Kingdom
- J. Zhang
- University of Virginia, Charlottesville, VA 22901, USA
- Journal volume & issue
-
Vol. 780
pp. 340 – 345
Abstract
We report on the first measurement of cross sections for exclusive deeply virtual pion electroproduction off the proton, ep→e′nπ+, above the resonance region at backward pion center-of-mass angles. The φπ⁎-dependent cross sections were measured, from which we extracted three combinations of structure functions of the proton. Our results are compatible with calculations based on nucleon-to-pion transition distribution amplitudes (TDAs). These non-perturbative objects are defined as matrix elements of three-quark-light-cone-operators and characterize partonic correlations with a particular emphasis on baryon charge distribution inside a nucleon. Keywords: TDA, Exclusive single pion, Eletroproduction, CLAS
