Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2
Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either 2H or 3He targets. In order to extract useful neutron information from a 3He target, one must understand how the neutron in a 3He system differs from a free neutron...
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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Format: | Article |
Language: | English |
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Elsevier
2019-10-01
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Series: | Physics Letters B |
Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269319305891 |
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author |
E. Long Y.W. Zhang M. Mihovilovič G. Jin V. Sulkosky A. Kelleher B. Anderson D.W. Higinbotham S. Širca K. Allada J.R.M. Annand T. Averett W. Bertozzi W. Boeglin P. Bradshaw A. Camsonne M. Canan G.D. Cates C. Chen J.-P. Chen E. Chudakov R. De Leo X. Deng A. Deur C. Dutta L. El Fassi D. Flay S. Frullani F. Garibaldi H. Gao S. Gilad R. Gilman O. Glamazdin S. Golge J. Gomez J.-O. Hansen T. Holmstrom J. Huang H. Ibrahim C.W. de Jager E. Jensen X. Jiang M. Jones H. Kang J. Katich H.P. Khanal P.M. King W. Korsch J. LeRose R. Lindgren H.-J. Lu W. Luo P. Markowitz M. Meziane R. Michaels B. Moffit P. Monaghan N. Muangma S. Nanda B.E. Norum K. Pan D. Parno E. Piasetzky M. Posik V. Punjabi A.J.R. Puckett X. Qian Y. Qiang X. Qui S. Riordan A. Saha B. Sawatzky M. Shabestari A. Shahinyan B. Shoenrock J. St. John R. Subedi W.A. Tobias W. Tireman G.M. Urciuoli D. Wang K. Wang Y. Wang J. Watson B. Wojtsekhowski Z. Ye X. Zhan Y. Zhang X. Zheng B. Zhao L. Zhu |
spellingShingle |
E. Long Y.W. Zhang M. Mihovilovič G. Jin V. Sulkosky A. Kelleher B. Anderson D.W. Higinbotham S. Širca K. Allada J.R.M. Annand T. Averett W. Bertozzi W. Boeglin P. Bradshaw A. Camsonne M. Canan G.D. Cates C. Chen J.-P. Chen E. Chudakov R. De Leo X. Deng A. Deur C. Dutta L. El Fassi D. Flay S. Frullani F. Garibaldi H. Gao S. Gilad R. Gilman O. Glamazdin S. Golge J. Gomez J.-O. Hansen T. Holmstrom J. Huang H. Ibrahim C.W. de Jager E. Jensen X. Jiang M. Jones H. Kang J. Katich H.P. Khanal P.M. King W. Korsch J. LeRose R. Lindgren H.-J. Lu W. Luo P. Markowitz M. Meziane R. Michaels B. Moffit P. Monaghan N. Muangma S. Nanda B.E. Norum K. Pan D. Parno E. Piasetzky M. Posik V. Punjabi A.J.R. Puckett X. Qian Y. Qiang X. Qui S. Riordan A. Saha B. Sawatzky M. Shabestari A. Shahinyan B. Shoenrock J. St. John R. Subedi W.A. Tobias W. Tireman G.M. Urciuoli D. Wang K. Wang Y. Wang J. Watson B. Wojtsekhowski Z. Ye X. Zhan Y. Zhang X. Zheng B. Zhao L. Zhu Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2 Physics Letters B |
author_facet |
E. Long Y.W. Zhang M. Mihovilovič G. Jin V. Sulkosky A. Kelleher B. Anderson D.W. Higinbotham S. Širca K. Allada J.R.M. Annand T. Averett W. Bertozzi W. Boeglin P. Bradshaw A. Camsonne M. Canan G.D. Cates C. Chen J.-P. Chen E. Chudakov R. De Leo X. Deng A. Deur C. Dutta L. El Fassi D. Flay S. Frullani F. Garibaldi H. Gao S. Gilad R. Gilman O. Glamazdin S. Golge J. Gomez J.-O. Hansen T. Holmstrom J. Huang H. Ibrahim C.W. de Jager E. Jensen X. Jiang M. Jones H. Kang J. Katich H.P. Khanal P.M. King W. Korsch J. LeRose R. Lindgren H.-J. Lu W. Luo P. Markowitz M. Meziane R. Michaels B. Moffit P. Monaghan N. Muangma S. Nanda B.E. Norum K. Pan D. Parno E. Piasetzky M. Posik V. Punjabi A.J.R. Puckett X. Qian Y. Qiang X. Qui S. Riordan A. Saha B. Sawatzky M. Shabestari A. Shahinyan B. Shoenrock J. St. John R. Subedi W.A. Tobias W. Tireman G.M. Urciuoli D. Wang K. Wang Y. Wang J. Watson B. Wojtsekhowski Z. Ye X. Zhan Y. Zhang X. Zheng B. Zhao L. Zhu |
author_sort |
E. Long |
title |
Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2 |
title_short |
Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2 |
title_full |
Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2 |
title_fullStr |
Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2 |
title_full_unstemmed |
Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2 |
title_sort |
measurement of the single-spin asymmetry ay0 in quasi-elastic 3he↑(e,e′n) scattering at 0.4 < q2 < 1.0 gev/c2 |
publisher |
Elsevier |
series |
Physics Letters B |
issn |
0370-2693 |
publishDate |
2019-10-01 |
description |
Due to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either 2H or 3He targets. In order to extract useful neutron information from a 3He target, one must understand how the neutron in a 3He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson exchange currents. The target single spin asymmetry Ay0 is an ideal probe of such effects, as any deviation from zero indicates effects beyond plane wave impulse approximation. New measurements of the target single spin asymmetry Ay0 at Q2 of 0.46 and 0.96 (GeV/c)2 were made at Jefferson Lab using the quasi-elastic He↑3(e,e′n) reaction. Our measured asymmetry decreases rapidly, from >20% at Q2=0.46 (GeV/c)2 to nearly zero at Q2=0.96 (GeV/c)2, demonstrating the fall-off of the reaction mechanism effects as Q2 increases. We also observed a small ϵ-dependent increase in Ay0 compared to previous measurements, particularly at moderate Q2. This indicates that upcoming high Q2 measurements from the Jefferson Lab 12 GeV program can cleanly probe neutron structure from polarized 3He using plane wave impulse approximation. Keywords: Neutron, Quasi-elastic, Polarized, 3He, Electron scattering, Single spin asymmetry |
url |
http://www.sciencedirect.com/science/article/pii/S0370269319305891 |
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doaj-2f95e9e2a87f493eb396579e6a68df792020-11-25T01:21:52ZengElsevierPhysics Letters B0370-26932019-10-01797Measurement of the single-spin asymmetry Ay0 in quasi-elastic 3He↑(e,e′n) scattering at 0.4 < Q2 < 1.0 GeV/c2E. Long0Y.W. Zhang1M. Mihovilovič2G. Jin3V. Sulkosky4A. Kelleher5B. Anderson6D.W. Higinbotham7S. Širca8K. Allada9J.R.M. Annand10T. Averett11W. Bertozzi12W. Boeglin13P. Bradshaw14A. Camsonne15M. Canan16G.D. Cates17C. Chen18J.-P. Chen19E. Chudakov20R. De Leo21X. Deng22A. Deur23C. Dutta24L. El Fassi25D. Flay26S. Frullani27F. Garibaldi28H. Gao29S. Gilad30R. Gilman31O. Glamazdin32S. Golge33J. Gomez34J.-O. Hansen35T. Holmstrom36J. Huang37H. Ibrahim38C.W. de Jager39E. Jensen40X. Jiang41M. Jones42H. Kang43J. Katich44H.P. Khanal45P.M. King46W. Korsch47J. LeRose48R. Lindgren49H.-J. Lu50W. Luo51P. Markowitz52M. Meziane53R. Michaels54B. Moffit55P. Monaghan56N. Muangma57S. Nanda58B.E. Norum59K. Pan60D. Parno61E. Piasetzky62M. Posik63V. Punjabi64A.J.R. Puckett65X. Qian66Y. Qiang67X. Qui68S. Riordan69A. Saha70B. Sawatzky71M. Shabestari72A. Shahinyan73B. Shoenrock74J. St. John75R. Subedi76W.A. Tobias77W. Tireman78G.M. Urciuoli79D. Wang80K. Wang81Y. Wang82J. Watson83B. Wojtsekhowski84Z. Ye85X. Zhan86Y. Zhang87X. Zheng88B. Zhao89L. Zhu90University of New Hampshire, Durham, NH, 03824, USA; Corresponding author.Rutgers University, New Brunswick, NJ, 08901, USAJožef Stefan Institute, Ljubljana 1000, SloveniaUniversity of Virginia, Charlottesville, VA, 22908, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USAKent State University, Kent, OH, 44242, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAJožef Stefan Institute, Ljubljana 1000, SloveniaThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAGlasgow University, Glasgow, G12 8QQ, Scotland, United KingdomThe College of William and Mary, Williamsburg, VA, 23187, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USAFlorida International University, Miami, FL, 33181, USAThe College of William and Mary, Williamsburg, VA, 23187, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAOld Dominion University, Norfolk, VA, 23508, USAUniversity of Virginia, Charlottesville, VA, 22908, USAHampton University, Hampton, VA, 23669, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAUniversite di Bari, Bari, 70121 ItalyUniversity of Virginia, Charlottesville, VA, 22908, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAUniversity of Kentucky, Lexington, KY, 40506, USARutgers University, New Brunswick, NJ, 08901, USATemple University, Philadelphia, PA, 19122, USAIstituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, ItalyIstituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, ItalyDuke University, Durham, NC, 27708, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAKharkov Institute of Physics and Technology, Kharkov 61108, UkraineOld Dominion University, Norfolk, VA, 23508, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USALongwood University, Farmville, VA, 23909, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USA; Los Alamos National Laboratory, Los Alamos, NM, 87545, USACairo University, Cairo, Giza 12613, EgyptThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAChristopher Newport University, Newport News, VA, 23606, USALos Alamos National Laboratory, Los Alamos, NM, 87545, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USASeoul National University, Seoul, Republic of KoreaThe College of William and Mary, Williamsburg, VA, 23187, USAFlorida International University, Miami, FL, 33181, USAOhio University, Athens, OH, 45701, USAUniversity of Kentucky, Lexington, KY, 40506, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAUniversity of Virginia, Charlottesville, VA, 22908, USAHuangshan University, People's Republic of ChinaLanzhou University, Lanzhou, Gansu, 730000, People's Republic of ChinaFlorida International University, Miami, FL, 33181, USAThe College of William and Mary, Williamsburg, VA, 23187, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAHampton University, Hampton, VA, 23669, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAUniversity of Virginia, Charlottesville, VA, 22908, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USACarnegie Mellon University, Pittsburgh, PA, 15213, USATel Aviv University, Tel Aviv 69978, IsraelTemple University, Philadelphia, PA, 19122, USANorfolk State University, Norfolk, VA, 23504, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USA; Los Alamos National Laboratory, Los Alamos, NM, 87545, USADuke University, Durham, NC, 27708, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USALanzhou University, Lanzhou, Gansu, 730000, People's Republic of ChinaUniversity of Virginia, Charlottesville, VA, 22908, USA; Massachusetts Institute of Technology, Cambridge, MA, 02139, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAUniversity of Virginia, Charlottesville, VA, 22908, USAYerevan Physics Institute, Yerevan, ArmeniaNorthern Michigan University, Marquette, MI, 49855, USALongwood University, Farmville, VA, 23909, USAGeorge Washington University, Washington, DC, 20052, USAUniversity of Virginia, Charlottesville, VA, 22908, USANorthern Michigan University, Marquette, MI, 49855, USAIstituto Nazionale Di Fisica Nucleare, INFN/Sanita, Roma, ItalyUniversity of Virginia, Charlottesville, VA, 22908, USAUniversity of Virginia, Charlottesville, VA, 22908, USAUniversity of Illinois at Urbana-Champaign, Urbana, IL, 61801, USAKent State University, Kent, OH, 44242, USAThomas Jefferson National Accelerator Facility, Newport News, VA 23606, USAHampton University, Hampton, VA, 23669, USAMassachusetts Institute of Technology, Cambridge, MA, 02139, USALanzhou University, Lanzhou, Gansu, 730000, People's Republic of ChinaUniversity of Virginia, Charlottesville, VA, 22908, USAThe College of William and Mary, Williamsburg, VA, 23187, USAHampton University, Hampton, VA, 23669, USADue to the lack of free neutron targets, studies of the structure of the neutron are typically made by scattering electrons from either 2H or 3He targets. In order to extract useful neutron information from a 3He target, one must understand how the neutron in a 3He system differs from a free neutron by taking into account nuclear effects such as final state interactions and meson exchange currents. The target single spin asymmetry Ay0 is an ideal probe of such effects, as any deviation from zero indicates effects beyond plane wave impulse approximation. New measurements of the target single spin asymmetry Ay0 at Q2 of 0.46 and 0.96 (GeV/c)2 were made at Jefferson Lab using the quasi-elastic He↑3(e,e′n) reaction. Our measured asymmetry decreases rapidly, from >20% at Q2=0.46 (GeV/c)2 to nearly zero at Q2=0.96 (GeV/c)2, demonstrating the fall-off of the reaction mechanism effects as Q2 increases. We also observed a small ϵ-dependent increase in Ay0 compared to previous measurements, particularly at moderate Q2. This indicates that upcoming high Q2 measurements from the Jefferson Lab 12 GeV program can cleanly probe neutron structure from polarized 3He using plane wave impulse approximation. Keywords: Neutron, Quasi-elastic, Polarized, 3He, Electron scattering, Single spin asymmetryhttp://www.sciencedirect.com/science/article/pii/S0370269319305891 |