Beam Spin Asymmetry in Semi-Inclusive Electroproduction of Hadron Pairs

M Mirazita¹, H Avakian², A Courtoy³, S Pisano⁴, S Adhikari⁵, M J Amaryan⁶, Giovanni Angelini⁷, H Atac⁸, N A Baltzell², L Barion⁹, M Battaglieri^{10

2}, I Bedlinskiy¹¹, Fatiha Benmokhtar¹², A Bianconi^{13

14}, A S Biselli^{15

16}, F Bossù¹⁷, S Boiarinov², W J Briscoe⁷, W K Brooks^{2

18}, D Bulumulla⁶, V D Burkert², D S Carman², J C Carvajal⁵, A Celentano¹⁰, P Chatagnon¹⁹, T Chetry²⁰, G Ciullo^{21

9}, B Clary²², P L Cole^{23

2}, M Contalbrigo⁹, V Crede²⁴, A D'Angelo^{25

26}, N Dashyan²⁷, R De Vita¹⁰, M Defurne¹⁷, A Deur², S Diehl²², C Dilks²⁸, C Djalali^{29

30}, R Dupre¹⁹, H Egiyan², M Ehrhart³¹, A El Alaoui¹⁸, L El Fassi²⁰, P Eugenio²⁴, S Fegan³², R Fersch^{33

34}, A Filippi³⁵, T A Forest³⁶, Y Ghandilyan²⁷, G Gavalian^{37

2}, G P Gilfoyle³⁸, K L Giovanetti³⁹, F X Girod², D I Glazier⁴⁰, E Golovatch⁴¹, R W Gothe³⁰, K A Griffioen³⁴, M Guidal¹⁹, L Guo^{5

2}, K Hafidi³¹, H Hakobyan^{18

27}, M Hattawy⁶, T B Hayward³⁴, D Heddle^{33

2}, K Hicks²⁹, A Hobart¹⁹, M Holtrop³⁷, Q Huang¹⁷, Y Ilieva^{7

30}, D G Ireland⁴⁰, B S Ishkhanov⁴¹, E L Isupov⁴¹, D Jenkins⁴², H S Jo^{19

43}, K Joo²², D Keller⁴⁴, A Khanal⁵, M Khandaker⁴⁵, C W Kim⁷, W Kim⁴³, F J Klein⁴⁶, V Kubarovsky^{47

2}, S E Kuhn⁶, L Lanza²⁵, M Leali^{13

14}, P Lenisa^{21

9}, K Livingston⁴⁰, I J D MacGregor⁴⁰, D Marchand¹⁹, N Markov^{22

2}, L Marsicano¹⁰, V Mascagna^{13

48}, B McKinnon⁴⁰, R G Milner⁴⁹, T Mineeva¹⁸, V Mokeev^{41

2}, C Mullen¹⁰, C Munoz Camacho¹⁹, K Neupane³⁰, G Niculescu^{39

29}, T O'Connell²², M Osipenko¹⁰, M Paolone⁸, L L Pappalardo^{21

9}, R Paremuzyan², K Park⁴³, E Pasyuk², W Phelps³³, D Pocanic⁴⁴, O Pogorelko¹¹, J Poudel⁶, Y Prok^{6

44}, B A Raue^{5

2}, M Ripani¹⁰, J Ritman⁵⁰, A Rizzo^{25

26}, P Rossi^{1

2}, F Sabatié¹⁷, C Salgado⁴⁵, A Schmidt⁷, R A Schumacher¹⁵, Y G Sharabian², U Shrestha²⁹, O Soto¹, N Sparveris⁸, S Stepanyan², I I Strakovsky⁷, S Strauch^{7

30}, N Tyler³⁰, M Ungaro^{47

2}, L Venturelli^{13

14}, H Voskanyan²⁷, A Vossen²⁸, E Voutier¹⁹, D Watts³², K Wei²², X Wei², M H Wood^{51

30}, B Yale³⁴, N Zachariou³², J Zhang⁴⁴, Z W Zhao²⁸; CLAS Collaboration

Affiliations

¹ INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
² Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
³ Instituto de Física, Universidad Nacional Autónoma de México Apartado Postal 20-364, Ciudad de México 01000, Mexico.
⁴ Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, 00184 Rome, Italy.
⁵ Florida International University, Miami, Florida 33199, USA.
⁶ Old Dominion University, Norfolk, Virginia 23529, USA.
⁷ The George Washington University, Washington, D.C. 20052, USA.
⁸ Temple University, Philadelphia, Pennsylvania 19122, USA.
⁹ INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
¹⁰ INFN, Sezione di Genova, 16146 Genova, Italy.
¹¹ National Research Centre Kurchatov Institute-ITEP, Moscow 117259, Russia.
¹² Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA.
¹³ INFN, Sezione di Pavia, 27100 Pavia, Italy.
¹⁴ Università degli Studi di Brescia, 25123 Brescia, Italy.
¹⁵ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
¹⁶ Fairfield University, Fairfield Connecticut 06824, USA.
¹⁷ IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
¹⁸ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
¹⁹ Universit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France.
²⁰ Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
²¹ Universita' di Ferrara, 44121 Ferrara, Italy.
²² University of Connecticut, Storrs, Connecticut 06269, USA.
²³ Lamar University, 4400 MLK Blvd, PO Box 10009, Beaumont, Texas 77710, USA.
²⁴ Florida State University, Tallahassee, Florida 32306, 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 Duke University, Durham, North Carolina 27708-0305, USA.
²⁹ Ohio University, Athens, Ohio 45701, USA.
³⁰ University of South Carolina, Columbia, South Carolina 29208, USA.
³¹ Argonne National Laboratory, Argonne, Illinois 60439, USA.
³² University of York, York YO10 5DD, United Kingdom.
³³ Christopher Newport University, Newport News, Virginia 23606, USA.
³⁴ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
³⁵ INFN, Sezione di Torino, 10125 Torino, Italy.
³⁶ Idaho State University, Pocatello, Idaho 83209, USA.
³⁷ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³⁸ University of Richmond, Richmond, Virginia 23173, USA.
³⁹ James Madison University, Harrisonburg, Virginia 22807, USA.
⁴⁰ University of Glasgow, Glasgow G12 8QQ, United Kingdom.
⁴¹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
⁴² Virginia Tech, Blacksburg, Virginia 24061-0435, USA.
⁴³ Kyungpook National University, Daegu 41566, Republic of Korea.
⁴⁴ University of Virginia, Charlottesville, Virginia 22901, USA.
⁴⁵ Norfolk State University, Norfolk, Virginia 23504, USA.
⁴⁶ Catholic University of America, Washington, D.C. 20064, USA.
⁴⁷ Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.
⁴⁸ Università degli Studi dell'Insubria, 22100 Como, Italy.
⁴⁹ Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
⁵⁰ Institute fur Kernphysik (Juelich), Juelich 52428, Germany.
⁵¹ Canisius College, Buffalo, New York 14208, USA.

PMID: 33635681
DOI: 10.1103/PhysRevLett.126.062002

Beam Spin Asymmetry in Semi-Inclusive Electroproduction of Hadron Pairs

M Mirazita et al. Phys Rev Lett. 2021.

. 2021 Feb 12;126(6):062002.

doi: 10.1103/PhysRevLett.126.062002.

Authors

Affiliations

¹ INFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy.
² Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA.
³ Instituto de Física, Universidad Nacional Autónoma de México Apartado Postal 20-364, Ciudad de México 01000, Mexico.
⁴ Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche Enrico Fermi, 00184 Rome, Italy.
⁵ Florida International University, Miami, Florida 33199, USA.
⁶ Old Dominion University, Norfolk, Virginia 23529, USA.
⁷ The George Washington University, Washington, D.C. 20052, USA.
⁸ Temple University, Philadelphia, Pennsylvania 19122, USA.
⁹ INFN, Sezione di Ferrara, 44100 Ferrara, Italy.
¹⁰ INFN, Sezione di Genova, 16146 Genova, Italy.
¹¹ National Research Centre Kurchatov Institute-ITEP, Moscow 117259, Russia.
¹² Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, USA.
¹³ INFN, Sezione di Pavia, 27100 Pavia, Italy.
¹⁴ Università degli Studi di Brescia, 25123 Brescia, Italy.
¹⁵ Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
¹⁶ Fairfield University, Fairfield Connecticut 06824, USA.
¹⁷ IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
¹⁸ Universidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile.
¹⁹ Universit'e Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France.
²⁰ Mississippi State University, Mississippi State, Mississippi 39762-5167, USA.
²¹ Universita' di Ferrara, 44121 Ferrara, Italy.
²² University of Connecticut, Storrs, Connecticut 06269, USA.
²³ Lamar University, 4400 MLK Blvd, PO Box 10009, Beaumont, Texas 77710, USA.
²⁴ Florida State University, Tallahassee, Florida 32306, 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 Duke University, Durham, North Carolina 27708-0305, USA.
²⁹ Ohio University, Athens, Ohio 45701, USA.
³⁰ University of South Carolina, Columbia, South Carolina 29208, USA.
³¹ Argonne National Laboratory, Argonne, Illinois 60439, USA.
³² University of York, York YO10 5DD, United Kingdom.
³³ Christopher Newport University, Newport News, Virginia 23606, USA.
³⁴ College of William and Mary, Williamsburg, Virginia 23187-8795, USA.
³⁵ INFN, Sezione di Torino, 10125 Torino, Italy.
³⁶ Idaho State University, Pocatello, Idaho 83209, USA.
³⁷ University of New Hampshire, Durham, New Hampshire 03824-3568, USA.
³⁸ University of Richmond, Richmond, Virginia 23173, USA.
³⁹ James Madison University, Harrisonburg, Virginia 22807, USA.
⁴⁰ University of Glasgow, Glasgow G12 8QQ, United Kingdom.
⁴¹ Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, Russia.
⁴² Virginia Tech, Blacksburg, Virginia 24061-0435, USA.
⁴³ Kyungpook National University, Daegu 41566, Republic of Korea.
⁴⁴ University of Virginia, Charlottesville, Virginia 22901, USA.
⁴⁵ Norfolk State University, Norfolk, Virginia 23504, USA.
⁴⁶ Catholic University of America, Washington, D.C. 20064, USA.
⁴⁷ Rensselaer Polytechnic Institute, Troy, New York 12180-3590, USA.
⁴⁸ Università degli Studi dell'Insubria, 22100 Como, Italy.
⁴⁹ Massachusetts Institute of Technology, Cambridge, Massachusetts 02139-4307, USA.
⁵⁰ Institute fur Kernphysik (Juelich), Juelich 52428, Germany.
⁵¹ Canisius College, Buffalo, New York 14208, USA.

PMID: 33635681
DOI: 10.1103/PhysRevLett.126.062002

Abstract

A first measurement of the longitudinal beam spin asymmetry A_{LU} in the semi-inclusive electroproduction of pairs of charged pions is reported. A_{LU} is a higher-twist observable and offers the cleanest access to the nucleon twist-3 parton distribution function e(x). Data have been collected in the Hall-B at Jefferson Lab by impinging a 5.498-GeV electron beam on a liquid-hydrogen target, and reconstructing the scattered electron and the pion pair with the CLAS detector. One-dimensional projections of the A_{LU}^{sinϕ_{R}} moments are extracted for the kinematic variables of interest in the valence quark region. The understanding of dihadron production is essential for the interpretation of observables in single-hadron production in semi-inclusive DIS, and pioneering measurements of single-spin asymmetries in dihadron production open a new avenue in studies of QCD dynamics.

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Beam Spin Asymmetry in Semi-Inclusive Electroproduction of Hadron Pairs

Affiliations

Beam Spin Asymmetry in Semi-Inclusive Electroproduction of Hadron Pairs

Authors

Affiliations

Abstract

LinkOut - more resources

Full Text Sources

Other Literature Sources

Miscellaneous