Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS
We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally pol...
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Format: | Article |
Language: | English |
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Elsevier
2018-07-01
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Series: | Physics Letters B |
Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269318304623 |
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author | S. Jawalkar S. Koirala H. Avakian P. Bosted K.A. Griffioen C. Keith S.E. Kuhn K.P. Adhikari S. Adhikari D. Adikaram Z. Akbar M.J. Amaryan S. Anefalos Pereira J. Ball N.A. Baltzell M. Battaglieri V. Batourine I. Bedlinskiy A.S. Biselli S. Boiarinov W.J. Briscoe J. Brock W.K. Brooks S. Bültmann V.D. Burkert Frank Thanh Cao C. Carlin D.S. Carman A. Celentano G. Charles T. Chetry G. Ciullo L. Clark L. Colaneri P.L. Cole M. Contalbrigo O. Cortes V. Crede A. D'Angelo N. Dashyan R. De Vita E. De Sanctis M. Defurne A. Deur C. Djalali G. Ddoge R. Dupre H. Egiyan A. El Alaoui L. El Fassi L. Elouadrhiri P. Eugenio G. Fedotov S. Fegan R. Fersch A. Filippi J.A. Fleming T.A. Forest A. Fradi M. Garçon Y. Ghandilyan G.P. Gilfoyle K.L. Giovanetti F.X. Girod C. Gleason W. Gohn E. Golovatch R.W. Gothe M. Guidal N. Guler L. Guo H. Hakobyan C. Hanretty N. Harrison M. Hattawy D. Heddle K. Hicks G. Hollis M. Holtrop S.M. Hughes Y. Ilieva D.G. Ireland B.S. Ishkhanov E.L. Isupov D. Jenkins H. Jiang K. Joo S. Joosten D. Keller G. Khachatryan M. Khachatryan M. Khandaker A. Kim W. Kim A. Klein F.J. Klein V. Kubarovsky S.V. Kuleshov L. Lanza P. Lenisa K. Livingston H.Y. Lu I.J.D. MacGregor N. Markov M. Mayer M.E. McCracken B. McKinnon C.A. Meyer T. Mineeva M. Mirazita V. Mokeev R.A. Montgomery A. Movsisyan C. Munoz Camacho P. Nadel-Turonski L.A. Net S. Niccolai G. Niculescu I. Niculescu M. Osipenko A.I. Ostrovidov R. Paremuzyan K. Park E. Pasyuk E. Phelps W. Phelps J. Pierce S. Pisano O. Pogorelko J.W. Price Y. Prok D. Protopopescu B.A. Raue M. Ripani D. Riser A. Rizzo G. Rosner P. Rossi F. Sabatié C. Salgado R.A. Schumacher E. Seder Y.G. Sharabian A. Simonyan Iu. Skorodumina G.D. Smith D.I. Sober D. Sokhan N. Sparveris I. Stankovic S. Strauch M. Taiuti M. Ungaro H. Voskanyan E. Voutier N.K. Walford D.P. Watts X. Wei L.B. Weinstein M.H. Wood N. Zachariou J. Zhang Z.W. Zhao |
author_facet | S. Jawalkar S. Koirala H. Avakian P. Bosted K.A. Griffioen C. Keith S.E. Kuhn K.P. Adhikari S. Adhikari D. Adikaram Z. Akbar M.J. Amaryan S. Anefalos Pereira J. Ball N.A. Baltzell M. Battaglieri V. Batourine I. Bedlinskiy A.S. Biselli S. Boiarinov W.J. Briscoe J. Brock W.K. Brooks S. Bültmann V.D. Burkert Frank Thanh Cao C. Carlin D.S. Carman A. Celentano G. Charles T. Chetry G. Ciullo L. Clark L. Colaneri P.L. Cole M. Contalbrigo O. Cortes V. Crede A. D'Angelo N. Dashyan R. De Vita E. De Sanctis M. Defurne A. Deur C. Djalali G. Ddoge R. Dupre H. Egiyan A. El Alaoui L. El Fassi L. Elouadrhiri P. Eugenio G. Fedotov S. Fegan R. Fersch A. Filippi J.A. Fleming T.A. Forest A. Fradi M. Garçon Y. Ghandilyan G.P. Gilfoyle K.L. Giovanetti F.X. Girod C. Gleason W. Gohn E. Golovatch R.W. Gothe M. Guidal N. Guler L. Guo H. Hakobyan C. Hanretty N. Harrison M. Hattawy D. Heddle K. Hicks G. Hollis M. Holtrop S.M. Hughes Y. Ilieva D.G. Ireland B.S. Ishkhanov E.L. Isupov D. Jenkins H. Jiang K. Joo S. Joosten D. Keller G. Khachatryan M. Khachatryan M. Khandaker A. Kim W. Kim A. Klein F.J. Klein V. Kubarovsky S.V. Kuleshov L. Lanza P. Lenisa K. Livingston H.Y. Lu I.J.D. MacGregor N. Markov M. Mayer M.E. McCracken B. McKinnon C.A. Meyer T. Mineeva M. Mirazita V. Mokeev R.A. Montgomery A. Movsisyan C. Munoz Camacho P. Nadel-Turonski L.A. Net S. Niccolai G. Niculescu I. Niculescu M. Osipenko A.I. Ostrovidov R. Paremuzyan K. Park E. Pasyuk E. Phelps W. Phelps J. Pierce S. Pisano O. Pogorelko J.W. Price Y. Prok D. Protopopescu B.A. Raue M. Ripani D. Riser A. Rizzo G. Rosner P. Rossi F. Sabatié C. Salgado R.A. Schumacher E. Seder Y.G. Sharabian A. Simonyan Iu. Skorodumina G.D. Smith D.I. Sober D. Sokhan N. Sparveris I. Stankovic S. Strauch M. Taiuti M. Ungaro H. Voskanyan E. Voutier N.K. Walford D.P. Watts X. Wei L.B. Weinstein M.H. Wood N. Zachariou J. Zhang Z.W. Zhao |
author_sort | S. Jawalkar |
collection | DOAJ |
description | We present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally polarized protons in a cryogenic 14NH3 target, and extracted double and single target spin asymmetries for ep→e′π0X in multidimensional bins in four-momentum transfer (1.0<Q2<3.2 GeV2), Bjorken-x (0.12<x<0.48), hadron energy fraction (0.4<z<0.7), transverse pion momentum (0<PT<1.0 GeV), and azimuthal angle ϕh between the lepton scattering and hadron production planes. We extracted asymmetries as a function of both x and PT, which provide access to transverse-momentum distributions of longitudinally polarized quarks. The double spin asymmetries depend weakly on PT. The sin2ϕh moments are zero within uncertainties, which is consistent with the expected suppression of the Collins fragmentation function. The observed sinϕh moments suggest that quark gluon correlations are significant at large x. Keywords: Semi-inclusive deep-inelastic scattering, Single spin asymmetries, Double spin asymmetries, Transverse momentum distributions, Collins fragmentation |
first_indexed | 2024-12-16T06:58:31Z |
format | Article |
id | doaj.art-b71be783271641348981dcb290080f4e |
institution | Directory Open Access Journal |
issn | 0370-2693 |
language | English |
last_indexed | 2024-12-16T06:58:31Z |
publishDate | 2018-07-01 |
publisher | Elsevier |
record_format | Article |
series | Physics Letters B |
spelling | doaj.art-b71be783271641348981dcb290080f4e2022-12-21T22:40:13ZengElsevierPhysics Letters B0370-26932018-07-01782662667Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLASS. Jawalkar0S. Koirala1H. Avakian2P. Bosted3K.A. Griffioen4C. Keith5S.E. Kuhn6K.P. Adhikari7S. Adhikari8D. Adikaram9Z. Akbar10M.J. Amaryan11S. Anefalos Pereira12J. Ball13N.A. Baltzell14M. Battaglieri15V. Batourine16I. Bedlinskiy17A.S. Biselli18S. Boiarinov19W.J. Briscoe20J. Brock21W.K. Brooks22S. Bültmann23V.D. Burkert24Frank Thanh Cao25C. Carlin26D.S. Carman27A. Celentano28G. Charles29T. Chetry30G. Ciullo31L. Clark32L. Colaneri33P.L. Cole34M. Contalbrigo35O. Cortes36V. Crede37A. D'Angelo38N. Dashyan39R. De Vita40E. De Sanctis41M. Defurne42A. Deur43C. Djalali44G. Ddoge45R. Dupre46H. Egiyan47A. El Alaoui48L. El Fassi49L. Elouadrhiri50P. Eugenio51G. Fedotov52S. Fegan53R. Fersch54A. Filippi55J.A. Fleming56T.A. Forest57A. Fradi58M. Garçon59Y. Ghandilyan60G.P. Gilfoyle61K.L. Giovanetti62F.X. Girod63C. Gleason64W. Gohn65E. Golovatch66R.W. Gothe67M. Guidal68N. Guler69L. Guo70H. Hakobyan71C. Hanretty72N. Harrison73M. Hattawy74D. Heddle75K. Hicks76G. Hollis77M. Holtrop78S.M. Hughes79Y. Ilieva80D.G. Ireland81B.S. Ishkhanov82E.L. Isupov83D. Jenkins84H. Jiang85K. Joo86S. Joosten87D. Keller88G. Khachatryan89M. Khachatryan90M. Khandaker91A. Kim92W. Kim93A. Klein94F.J. Klein95V. Kubarovsky96S.V. Kuleshov97L. Lanza98P. Lenisa99K. Livingston100H.Y. Lu101I.J.D. MacGregor102N. Markov103M. Mayer104M.E. McCracken105B. McKinnon106C.A. Meyer107T. Mineeva108M. Mirazita109V. Mokeev110R.A. Montgomery111A. Movsisyan112C. Munoz Camacho113P. Nadel-Turonski114L.A. Net115S. Niccolai116G. Niculescu117I. Niculescu118M. Osipenko119A.I. Ostrovidov120R. Paremuzyan121K. Park122E. Pasyuk123E. Phelps124W. Phelps125J. Pierce126S. Pisano127O. Pogorelko128J.W. Price129Y. Prok130D. Protopopescu131B.A. Raue132M. Ripani133D. Riser134A. Rizzo135G. Rosner136P. Rossi137F. Sabatié138C. Salgado139R.A. Schumacher140E. Seder141Y.G. Sharabian142A. Simonyan143Iu. Skorodumina144G.D. Smith145D.I. Sober146D. Sokhan147N. Sparveris148I. Stankovic149S. Strauch150M. Taiuti151M. Ungaro152H. Voskanyan153E. Voutier154N.K. Walford155D.P. Watts156X. Wei157L.B. Weinstein158M.H. Wood159N. Zachariou160J. Zhang161Z.W. Zhao162College of William and Mary, Williamsburg, VA 23187-8795, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaCollege of William and Mary, Williamsburg, VA 23187-8795, United States of America; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaCollege of William and Mary, Williamsburg, VA 23187-8795, United States of America; Corresponding author.Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of AmericaMississippi State University, Mississippi State, MS 39762-5167, United States of America; Florida International University, Miami, FL 33199, United States of AmericaFlorida International University, Miami, FL 33199, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of AmericaFlorida State University, Tallahassee, FL 32306, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of AmericaINFN, Laboratori Nazionali di Frascati, 00044 Frascati, ItalyIRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, FranceThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaINFN, Sezione di Genova, 16146 Genova, ItalyThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaInstitute of Theoretical and Experimental Physics, Moscow, 117259, RussiaFairfield University, Fairfield, CT 06824, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaThe George Washington University, Washington, DC 20052, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaUniversidad Técnica Federico Santa María, Casilla 110-V Valparaíso, ChileOld Dominion University, Norfolk, VA 23529, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaUniversity of Connecticut, Storrs, CT 06269, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaINFN, Sezione di Genova, 16146 Genova, ItalyOld Dominion University, Norfolk, VA 23529, United States of AmericaOhio University, Athens, OH 45701, United States of AmericaINFN, Sezione di Ferrara, 44100 Ferrara, Italy; Universita' di Ferrara, 44121 Ferrara, ItalyUniversity of Glasgow, Glasgow G12 8QQ, United KingdomInstitut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, FranceIdaho State University, Pocatello, ID 83209, United States of AmericaINFN, Sezione di Ferrara, 44100 Ferrara, ItalyIdaho State University, Pocatello, ID 83209, United States of AmericaFlorida State University, Tallahassee, FL 32306, United States of AmericaINFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy; Universita' di Roma Tor Vergata, 00133 Rome, ItalyYerevan Physics Institute, 375036 Yerevan, ArmeniaINFN, Sezione di Genova, 16146 Genova, ItalyINFN, Laboratori Nazionali di Frascati, 00044 Frascati, ItalyIRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, FranceThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaUniversity of South Carolina, Columbia, SC 29208, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of AmericaInstitut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, France; Argonne National Laboratory, Argonne, IL 60439, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of America; University of New Hampshire, Durham, NH 03824-3568, United States of AmericaUniversidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile; Argonne National Laboratory, Argonne, IL 60439, United States of AmericaMississippi State University, Mississippi State, MS 39762-5167, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaFlorida State University, Tallahassee, FL 32306, United States of AmericaUniversity of South Carolina, Columbia, SC 29208, United States of America; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaUniversity of Glasgow, Glasgow G12 8QQ, United KingdomChristopher Newport University, Newport News, VA 23606, United States of America; College of William and Mary, Williamsburg, VA 23187-8795, United States of AmericaINFN, Sezione di Torino, 10125 Torino, ItalyEdinburgh University, Edinburgh EH9 3JZ, United KingdomIdaho State University, Pocatello, ID 83209, United States of AmericaInstitut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, FranceIRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, FranceYerevan Physics Institute, 375036 Yerevan, ArmeniaUniversity of Richmond, Richmond, VA 23173, United States of AmericaJames Madison University, Harrisonburg, VA 22807, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaUniversity of South Carolina, Columbia, SC 29208, United States of AmericaUniversity of Connecticut, Storrs, CT 06269, United States of AmericaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaUniversity of South Carolina, Columbia, SC 29208, United States of AmericaInstitut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, FranceOld Dominion University, Norfolk, VA 23529, United States of AmericaFlorida International University, Miami, FL 33199, United States of America; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaUniversidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile; Yerevan Physics Institute, 375036 Yerevan, ArmeniaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of America; Florida State University, Tallahassee, FL 32306, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaArgonne National Laboratory, Argonne, IL 60439, United States of AmericaChristopher Newport University, Newport News, VA 23606, United States of America; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaOhio University, Athens, OH 45701, United States of AmericaUniversity of South Carolina, Columbia, SC 29208, United States of AmericaUniversity of New Hampshire, Durham, NH 03824-3568, United States of AmericaEdinburgh University, Edinburgh EH9 3JZ, United KingdomUniversity of South Carolina, Columbia, SC 29208, United States of AmericaUniversity of Glasgow, Glasgow G12 8QQ, United KingdomSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaSkobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaVirginia Tech, Blacksburg, VA 24061-0435, United States of AmericaUniversity of South Carolina, Columbia, SC 29208, United States of AmericaUniversity of Connecticut, Storrs, CT 06269, United States of AmericaTemple University, Philadelphia, PA 19122, United States of AmericaUniversity of Virginia, Charlottesville, VA 22901, United States of America; Ohio University, Athens, OH 45701, United States of AmericaYerevan Physics Institute, 375036 Yerevan, ArmeniaOld Dominion University, Norfolk, VA 23529, United States of AmericaNorfolk State University, Norfolk, VA 23504, United States of AmericaUniversity of Connecticut, Storrs, CT 06269, United States of AmericaKyungpook National University, Daegu 41566, Republic of KoreaOld Dominion University, Norfolk, VA 23529, United States of AmericaCatholic University of America, Washington, DC 20064, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaUniversidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile; Institute of Theoretical and Experimental Physics, Moscow, 117259, RussiaINFN, Sezione di Roma Tor Vergata, 00133 Rome, ItalyINFN, Sezione di Ferrara, 44100 Ferrara, ItalyUniversity of Glasgow, Glasgow G12 8QQ, United KingdomUniversity of South Carolina, Columbia, SC 29208, United States of AmericaUniversity of Glasgow, Glasgow G12 8QQ, United KingdomUniversity of Connecticut, Storrs, CT 06269, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of AmericaCarnegie Mellon University, Pittsburgh, PA 15213, United States of AmericaUniversity of Glasgow, Glasgow G12 8QQ, United KingdomCarnegie Mellon University, Pittsburgh, PA 15213, United States of AmericaUniversidad Técnica Federico Santa María, Casilla 110-V Valparaíso, Chile; University of Connecticut, Storrs, CT 06269, United States of AmericaINFN, Laboratori Nazionali di Frascati, 00044 Frascati, ItalyThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaUniversity of Glasgow, Glasgow G12 8QQ, United KingdomINFN, Sezione di Ferrara, 44100 Ferrara, ItalyInstitut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, FranceThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaUniversity of South Carolina, Columbia, SC 29208, United States of AmericaInstitut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, FranceJames Madison University, Harrisonburg, VA 22807, United States of AmericaJames Madison University, Harrisonburg, VA 22807, United States of AmericaINFN, Sezione di Genova, 16146 Genova, ItalyFlorida State University, Tallahassee, FL 32306, United States of AmericaUniversity of New Hampshire, Durham, NH 03824-3568, United States of America; Yerevan Physics Institute, 375036 Yerevan, ArmeniaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of America; University of South Carolina, Columbia, SC 29208, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of America; Arizona State University, Tempe, AZ 85287-1504, United States of AmericaUniversity of South Carolina, Columbia, SC 29208, United States of AmericaFlorida International University, Miami, FL 33199, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaINFN, Laboratori Nazionali di Frascati, 00044 Frascati, Italy; Institut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, FranceInstitute of Theoretical and Experimental Physics, Moscow, 117259, RussiaCalifornia State University, Dominguez Hills, Carson, CA 90747, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of America; University of Virginia, Charlottesville, VA 22901, United States of AmericaUniversity of Glasgow, Glasgow G12 8QQ, United KingdomFlorida International University, Miami, FL 33199, United States of America; Thomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaINFN, Sezione di Genova, 16146 Genova, ItalyUniversity of Connecticut, Storrs, CT 06269, United States of AmericaINFN, Sezione di Roma Tor Vergata, 00133 Rome, Italy; Universita' di Roma Tor Vergata, 00133 Rome, ItalyUniversity of Glasgow, Glasgow G12 8QQ, United KingdomThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of America; INFN, Laboratori Nazionali di Frascati, 00044 Frascati, ItalyIRFU, CEA, Universit'e Paris-Saclay, F-91191 Gif-sur-Yvette, FranceNorfolk State University, Norfolk, VA 23504, United States of AmericaCarnegie Mellon University, Pittsburgh, PA 15213, United States of AmericaUniversity of Connecticut, Storrs, CT 06269, United States of AmericaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaYerevan Physics Institute, 375036 Yerevan, ArmeniaUniversity of South Carolina, Columbia, SC 29208, United States of America; Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, 119234 Moscow, RussiaEdinburgh University, Edinburgh EH9 3JZ, United KingdomCatholic University of America, Washington, DC 20064, United States of AmericaUniversity of Glasgow, Glasgow G12 8QQ, United KingdomTemple University, Philadelphia, PA 19122, United States of AmericaEdinburgh University, Edinburgh EH9 3JZ, United KingdomUniversity of South Carolina, Columbia, SC 29208, United States of AmericaUniversità di Genova, 16146 Genova, ItalyThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of America; University of Connecticut, Storrs, CT 06269, United States of AmericaYerevan Physics Institute, 375036 Yerevan, ArmeniaInstitut de Physique Nucléaire, CNRS/IN2P3 and Université Paris Sud, Orsay, FranceCatholic University of America, Washington, DC 20064, United States of AmericaEdinburgh University, Edinburgh EH9 3JZ, United KingdomThomas Jefferson National Accelerator Facility, Newport News, VA 23606, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of AmericaCanisius College, Buffalo, NY, United States of AmericaEdinburgh University, Edinburgh EH9 3JZ, United KingdomUniversity of Virginia, Charlottesville, VA 22901, United States of AmericaOld Dominion University, Norfolk, VA 23529, United States of America; University of South Carolina, Columbia, SC 29208, United States of AmericaWe present precision measurements of the target and beam-target spin asymmetries from neutral pion electroproduction in deep-inelastic scattering (DIS) using the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab. We scattered 6-GeV, longitudinally polarized electrons off longitudinally polarized protons in a cryogenic 14NH3 target, and extracted double and single target spin asymmetries for ep→e′π0X in multidimensional bins in four-momentum transfer (1.0<Q2<3.2 GeV2), Bjorken-x (0.12<x<0.48), hadron energy fraction (0.4<z<0.7), transverse pion momentum (0<PT<1.0 GeV), and azimuthal angle ϕh between the lepton scattering and hadron production planes. We extracted asymmetries as a function of both x and PT, which provide access to transverse-momentum distributions of longitudinally polarized quarks. The double spin asymmetries depend weakly on PT. The sin2ϕh moments are zero within uncertainties, which is consistent with the expected suppression of the Collins fragmentation function. The observed sinϕh moments suggest that quark gluon correlations are significant at large x. Keywords: Semi-inclusive deep-inelastic scattering, Single spin asymmetries, Double spin asymmetries, Transverse momentum distributions, Collins fragmentationhttp://www.sciencedirect.com/science/article/pii/S0370269318304623 |
spellingShingle | S. Jawalkar S. Koirala H. Avakian P. Bosted K.A. Griffioen C. Keith S.E. Kuhn K.P. Adhikari S. Adhikari D. Adikaram Z. Akbar M.J. Amaryan S. Anefalos Pereira J. Ball N.A. Baltzell M. Battaglieri V. Batourine I. Bedlinskiy A.S. Biselli S. Boiarinov W.J. Briscoe J. Brock W.K. Brooks S. Bültmann V.D. Burkert Frank Thanh Cao C. Carlin D.S. Carman A. Celentano G. Charles T. Chetry G. Ciullo L. Clark L. Colaneri P.L. Cole M. Contalbrigo O. Cortes V. Crede A. D'Angelo N. Dashyan R. De Vita E. De Sanctis M. Defurne A. Deur C. Djalali G. Ddoge R. Dupre H. Egiyan A. El Alaoui L. El Fassi L. Elouadrhiri P. Eugenio G. Fedotov S. Fegan R. Fersch A. Filippi J.A. Fleming T.A. Forest A. Fradi M. Garçon Y. Ghandilyan G.P. Gilfoyle K.L. Giovanetti F.X. Girod C. Gleason W. Gohn E. Golovatch R.W. Gothe M. Guidal N. Guler L. Guo H. Hakobyan C. Hanretty N. Harrison M. Hattawy D. Heddle K. Hicks G. Hollis M. Holtrop S.M. Hughes Y. Ilieva D.G. Ireland B.S. Ishkhanov E.L. Isupov D. Jenkins H. Jiang K. Joo S. Joosten D. Keller G. Khachatryan M. Khachatryan M. Khandaker A. Kim W. Kim A. Klein F.J. Klein V. Kubarovsky S.V. Kuleshov L. Lanza P. Lenisa K. Livingston H.Y. Lu I.J.D. MacGregor N. Markov M. Mayer M.E. McCracken B. McKinnon C.A. Meyer T. Mineeva M. Mirazita V. Mokeev R.A. Montgomery A. Movsisyan C. Munoz Camacho P. Nadel-Turonski L.A. Net S. Niccolai G. Niculescu I. Niculescu M. Osipenko A.I. Ostrovidov R. Paremuzyan K. Park E. Pasyuk E. Phelps W. Phelps J. Pierce S. Pisano O. Pogorelko J.W. Price Y. Prok D. Protopopescu B.A. Raue M. Ripani D. Riser A. Rizzo G. Rosner P. Rossi F. Sabatié C. Salgado R.A. Schumacher E. Seder Y.G. Sharabian A. Simonyan Iu. Skorodumina G.D. Smith D.I. Sober D. Sokhan N. Sparveris I. Stankovic S. Strauch M. Taiuti M. Ungaro H. Voskanyan E. Voutier N.K. Walford D.P. Watts X. Wei L.B. Weinstein M.H. Wood N. Zachariou J. Zhang Z.W. Zhao Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS Physics Letters B |
title | Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS |
title_full | Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS |
title_fullStr | Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS |
title_full_unstemmed | Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS |
title_short | Semi-inclusive π0 target and beam-target asymmetries from 6 GeV electron scattering with CLAS |
title_sort | semi inclusive π0 target and beam target asymmetries from 6 gev electron scattering with clas |
url | http://www.sciencedirect.com/science/article/pii/S0370269318304623 |
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