First Exclusive Measurement of Deeply Virtual Compton Scattering off ^{4}He: Toward the 3D Tomography of Nuclei

M Hattawy^{1

2}, N A Baltzell^{1

3}, R Dupré^{1

2}, K Hafidi¹, S Stepanyan³, S Bültmann⁴, R De Vita⁵, A El Alaoui^{1

6}, L El Fassi⁷, H Egiyan³, F X Girod³, M Guidal², D Jenkins⁸, S Liuti⁹, Y Perrin¹⁰, B Torayev⁴, E Voutier^{2

10}, K P Adhikari⁷, S Adhikari¹¹, D Adikaram⁴, Z Akbar¹², M J Amaryan⁴, S Anefalos Pereira¹³, Whitney R Armstrong¹, H Avakian³, J Ball¹⁴, M Bashkanov¹⁵, M Battaglieri⁵, V Batourine³, I Bedlinskiy¹⁶, A S Biselli¹⁷, S Boiarinov³, W J Briscoe¹⁸, W K Brooks⁶, V D Burkert³, Frank Thanh Cao¹⁹, D S Carman³, A Celentano⁵, G Charles⁴, T Chetry²⁰, G Ciullo^{21

22}, L Clark²³, L Colaneri², P L Cole²⁴, M Contalbrigo²², O Cortes²⁴, V Crede¹², A D'Angelo^{25

26}, N Dashyan²⁷, E De Sanctis¹³, A Deur³, C Djalali²⁸, L Elouadrhiri³, P Eugenio¹², G Fedotov^{29

28}, S Fegan²³, R Fersch^{30

31}, A Filippi³², J A Fleming¹⁵, T A Forest²⁴, A Fradi², M Garçon¹⁴, N Gevorgyan²⁷, Y Ghandilyan²⁷, G P Gilfoyle³³, K L Giovanetti³⁴, C Gleason²⁸, W Gohn¹⁹, E Golovatch²⁹, R W Gothe²⁸, K A Griffioen³¹, L Guo^{11

3}, H Hakobyan^{6

27}, C Hanretty^{12

3}, N Harrison³, D Heddle^{30

3}, K Hicks²⁰, M Holtrop³⁵, S M Hughes¹⁵, D G Ireland²³, B S Ishkhanov²⁹, E L Isupov²⁹, H Jiang²⁸, K Joo¹⁹, S Joosten³⁶, D Keller^{20

9}, G Khachatryan²⁷, M Khachatryan⁴, M Khandaker³⁷, A Kim¹⁹, W Kim³⁸, A Klein⁴, F J Klein³⁹, V Kubarovsky³, S E Kuhn⁴, S V Kuleshov^{16

6}, L Lanza²⁵, P Lenisa²², K Livingston²³, H Y Lu²⁸, I J D MacGregor²³, N Markov¹⁹, M Mayer⁴, M E McCracken⁴⁰, B McKinnon²³, C A Meyer⁴⁰, Z E Meziani³⁶, T Mineeva^{19

6}, M Mirazita¹³, V Mokeev³, R A Montgomery²³, H Moutarde¹⁴, A Movsisyan²², C Munoz Camacho², P Nadel-Turonski³, L A Net²⁸, S Niccolai², G Niculescu³⁴, I Niculescu³⁴, M Osipenko⁵, A I Ostrovidov¹², M Paolone³⁶, R Paremuzyan^{35

27}, K Park^{28

3}, E Pasyuk^{41

3}, E Phelps²⁸, W Phelps¹¹, S Pisano^{13

2}, O Pogorelko¹⁶, J W Price⁴², Y Prok^{4

9}, D Protopopescu²³, M Ripani⁵, B G Ritchie⁴¹, A Rizzo^{25

26}, G Rosner²³, P Rossi^{13

3}, F Sabatié¹⁴, C Salgado³⁷, R A Schumacher⁴⁰, E Seder¹⁹, Y G Sharabian³, A Simonyan²⁷, Iu Skorodumina^{29

28}, G D Smith¹⁵, D Sokhan^{15

23}, N Sparveris³⁶, S Strauch²⁸, M Taiuti⁴³, M Ungaro^{19

3}, H Voskanyan²⁷, N K Walford³⁹, D P Watts¹⁵, X Wei³, L B Weinstein⁴, M H Wood⁴⁴, N Zachariou¹⁵, L Zana^{35

15}, J Zhang⁹, Z W Zhao^{4

28}; CLAS Collaboration

Affiliations

¹ Argonne National Laboratory, Argonne, Illinois 60439, USA.
² Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, 91406 Orsay, France.
³ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
⁴ Old Dominion University, Norfolk, Virginia 23529, USA.
⁵ INFN, Sezione di Genova, 16146 Genova, Italy.
⁶ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
⁷ Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
⁸ Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.
⁹ University of Virginia, Charlottesville, Virginia 22901, USA.
¹⁰ LPSC, Université Grenoble-Alpes, CNRS/IN2P3, 38026 Grenoble, France.
¹¹ Florida International University, Miami, Florida 33199, USA.
¹² Florida State University, Tallahassee, Florida 32306, USA.
¹³ INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
¹⁴ Irfu/SPhN, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
¹⁵ Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
¹⁶ Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
¹⁷ Fairfield University, Fairfield, Connecticut 06824, USA.
¹⁸ The George Washington University, Washington, DC 20052, USA.
¹⁹ University of Connecticut, Storrs, Connecticut 06269, USA.
²⁰ Ohio University, Athens, Ohio 45701, USA.
²¹ Universita' di Ferrara, 44121 Ferrara, Italy.
²² INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
²³ University of Glasgow, Glasgow G12 8QQ, United Kingdom.
²⁴ Idaho State University, Pocatello, Idaho 83209, USA.
²⁵ INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
²⁶ Universita' di Roma Tor Vergata, 00133 Rome, Italy.
²⁷ Yerevan Physics Institute, 375036 Yerevan, Armenia.
²⁸ University of South Carolina, Columbia, South Carolina 29208, USA.
²⁹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
³⁰ Christopher Newport University, Newport News, Virginia 23606, USA.
³¹ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
³² INFN, Sezione di Torino, 10125 Torino, Italy.
³³ University of Richmond, Richmond, Virginia 23173, USA.
³⁴ James Madison University, Harrisonburg, Virginia 22807, USA.
³⁵ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³⁶ Temple University, Philadelphia, Pennsylvania 19122, USA.
³⁷ Norfolk State University, Norfolk, Virginia 23504, USA.
³⁸ Kyungpook National University, Daegu 41566, Republic of Korea.
³⁹ Catholic University of America, Washington, DC 20064, USA.
⁴⁰ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
⁴¹ Arizona State University, Tempe, Arizona 85287-1504, USA.
⁴² California State University, Dominguez Hills, Carson, California 90747, USA.
⁴³ Università di Genova, 16146 Genova, Italy.
⁴⁴ Canisius College, Buffalo, New York, USA.

PMID: 29219329
DOI: 10.1103/PhysRevLett.119.202004

First Exclusive Measurement of Deeply Virtual Compton Scattering off ^{4}He: Toward the 3D Tomography of Nuclei

M Hattawy et al. Phys Rev Lett. 2017.

. 2017 Nov 17;119(20):202004.

doi: 10.1103/PhysRevLett.119.202004. Epub 2017 Nov 15.

Authors

Affiliations

¹ Argonne National Laboratory, Argonne, Illinois 60439, USA.
² Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, 91406 Orsay, France.
³ Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
⁴ Old Dominion University, Norfolk, Virginia 23529, USA.
⁵ INFN, Sezione di Genova, 16146 Genova, Italy.
⁶ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
⁷ Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
⁸ Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA.
⁹ University of Virginia, Charlottesville, Virginia 22901, USA.
¹⁰ LPSC, Université Grenoble-Alpes, CNRS/IN2P3, 38026 Grenoble, France.
¹¹ Florida International University, Miami, Florida 33199, USA.
¹² Florida State University, Tallahassee, Florida 32306, USA.
¹³ INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
¹⁴ Irfu/SPhN, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France.
¹⁵ Edinburgh University, Edinburgh EH9 3JZ, United Kingdom.
¹⁶ Institute of Theoretical and Experimental Physics, Moscow 117259, Russia.
¹⁷ Fairfield University, Fairfield, Connecticut 06824, USA.
¹⁸ The George Washington University, Washington, DC 20052, USA.
¹⁹ University of Connecticut, Storrs, Connecticut 06269, USA.
²⁰ Ohio University, Athens, Ohio 45701, USA.
²¹ Universita' di Ferrara, 44121 Ferrara, Italy.
²² INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
²³ University of Glasgow, Glasgow G12 8QQ, United Kingdom.
²⁴ Idaho State University, Pocatello, Idaho 83209, USA.
²⁵ INFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy.
²⁶ Universita' di Roma Tor Vergata, 00133 Rome, Italy.
²⁷ Yerevan Physics Institute, 375036 Yerevan, Armenia.
²⁸ University of South Carolina, Columbia, South Carolina 29208, USA.
²⁹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
³⁰ Christopher Newport University, Newport News, Virginia 23606, USA.
³¹ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
³² INFN, Sezione di Torino, 10125 Torino, Italy.
³³ University of Richmond, Richmond, Virginia 23173, USA.
³⁴ James Madison University, Harrisonburg, Virginia 22807, USA.
³⁵ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³⁶ Temple University, Philadelphia, Pennsylvania 19122, USA.
³⁷ Norfolk State University, Norfolk, Virginia 23504, USA.
³⁸ Kyungpook National University, Daegu 41566, Republic of Korea.
³⁹ Catholic University of America, Washington, DC 20064, USA.
⁴⁰ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
⁴¹ Arizona State University, Tempe, Arizona 85287-1504, USA.
⁴² California State University, Dominguez Hills, Carson, California 90747, USA.
⁴³ Università di Genova, 16146 Genova, Italy.
⁴⁴ Canisius College, Buffalo, New York, USA.

PMID: 29219329
DOI: 10.1103/PhysRevLett.119.202004

Abstract

We report on the first measurement of the beam-spin asymmetry in the exclusive process of coherent deeply virtual Compton scattering off a nucleus. The experiment uses the 6 GeV electron beam from the Continuous Electron Beam Accelerator Facility (CEBAF) accelerator at Jefferson Lab incident on a pressurized ^{4}He gaseous target placed in front of the CEBAF Large Acceptance Spectrometer (CLAS). The scattered electron is detected by CLAS and the photon by a dedicated electromagnetic calorimeter at forward angles. To ensure the exclusivity of the process, a specially designed radial time projection chamber is used to detect the recoiling ^{4}He nuclei. We measure beam-spin asymmetries larger than those observed on the free proton in the same kinematic domain. From these, we are able to extract, in a model-independent way, the real and imaginary parts of the only ^{4}He Compton form factor, H_{A}. This first measurement of coherent deeply virtual Compton scattering on the ^{4}He nucleus, with a fully exclusive final state via nuclear recoil tagging, leads the way toward 3D imaging of the partonic structure of nuclei.

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First Exclusive Measurement of Deeply Virtual Compton Scattering off ^{4}He: Toward the 3D Tomography of Nuclei

Affiliations

First Exclusive Measurement of Deeply Virtual Compton Scattering off ^{4}He: Toward the 3D Tomography of Nuclei

Authors

Affiliations

Abstract

LinkOut - more resources

Other Literature Sources