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Title: Beam-target double-spin asymmetry in quasielastic electron scattering off the deuteron with CLAS

Abstract

Background: The deuteron plays a pivotal role in nuclear and hadronic physics, as both the simplest bound multinucleon system and as an effective neutron target. Quasielastic electron scattering on the deuteron is a benchmark reaction to test our understanding of deuteron structure and the properties and interactions of the two nucleons bound in the deuteron. Purpose: The experimental data presented here can be used to test state-of-the-art models of the deuteron and the two-nucleon interaction in the final state after two-body breakup of the deuteron. Focusing on polarization degrees of freedom, we gain information on spin-momentum correlations in the deuteron ground state (due to the D-state admixture) and on the limits of the impulse approximation (IA) picture as it applies to measurements of spin-dependent observables like spin structure functions for bound nucleons. Information on this reaction can also be used to reduce systematic uncertainties on the determination of neutron form factors or deuteron polarization through quasielastic polarized electron scattering. Method: We measured the beam-target double-spin asymmetry (A||) for quasielastic electron scattering off the deuteron at several beam energies (1.6–1.7, 2.5, 4.2, and 5.6–5.8GeV), using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. The deuterons weremore » polarized along (or opposite to) the beam direction. The double-spin asymmetries were measured as a function of photon virtuality Q2(0.13–3.17(GeV/c)2), missing momentum (pm=0.0–0.5GeV/c), and the angle between the (inferred) spectator neutron and the momentum transfer direction (θnq). Results: The results are compared with a recent model that includes final-state interactions (FSI) using a complete parametrization of nucleon-nucleon scattering, as well as a simplified model using the plane wave impulse approximation (PWIA). We find overall good agreement with both the PWIA and FSI expectations at low to medium missing momenta (pm≤0.25GeV/c), including the change of the asymmetry due to the contribution of the deuteron D state at higher momenta. At the highest missing momenta, our data clearly agree better with the calculations including FSI. Conclusions: Final-state interactions seem to play a lesser role for polarization observables in deuteron two-body electrodisintegration than for absolute cross sections. Our data, while limited in statistical power, indicate that PWIA models work reasonably well to understand the asymmetries at lower missing momenta. In turn, this information can be used to extract the product of beam and target polarization (PbPt) from quasielastic electron-deuteron scattering, which is useful for measurements of spin observables in electron-neutron inelastic scattering. However, at the highest missing (neutron) momenta, FSI effects become important and must be accounted for.« less

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Lab. (ANL), Argonne, IL (United States); George Washington Univ., Washington, DC (United States); Mississippi State Univ., Starkville, MS (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); United Kingdom Science and Technology Facilities Council; Instituto Nazionale di Fisica Nucleare (INFN); National Research Foundation of Korea (NRF)
Contributing Org.:
CLAS Collaboration
OSTI Identifier:
1345562
Alternate Identifier(s):
OSTI ID: 1344952; OSTI ID: 1373588; OSTI ID: 1439892; OSTI ID: 1604554
Report Number(s):
JLAB-PHY-16-2371; DOE/OR/23177-3973; arXiv:1610.06109
Journal ID: ISSN 2469-9985; PRVCAN; TRN: US1700688
Grant/Contract Number:  
AC05-06OR23177; FG02-96ER40960; AC02-06CH11357; SC0016583; FG02-07ER41528
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 95; Journal Issue: 2; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; deuteron structure; spin observables; final state interaction; quasi-elastic electron scattering

Citation Formats

Mayer, M., Kuhn, S. E., Adhikari, K. P., Akbar, Z., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Bosted, P., Briscoe, W. J., Brooks, W. K., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Forest, T. A., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hakobyan, H., Hanretty, C., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jiang, H., Keith, C., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., McKinnon, B., Meekins, D., Mirazita, M., Mokeev, V., Movsisyan, A., Net, L. A., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Puckett, A. J. R., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Sabatié, F., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strauch, S., Sytnik, V., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., and Zonta, I. Beam-target double-spin asymmetry in quasielastic electron scattering off the deuteron with CLAS. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.95.024005.
Mayer, M., Kuhn, S. E., Adhikari, K. P., Akbar, Z., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Bosted, P., Briscoe, W. J., Brooks, W. K., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Forest, T. A., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hakobyan, H., Hanretty, C., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jiang, H., Keith, C., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., McKinnon, B., Meekins, D., Mirazita, M., Mokeev, V., Movsisyan, A., Net, L. A., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Puckett, A. J. R., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Sabatié, F., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strauch, S., Sytnik, V., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., & Zonta, I. Beam-target double-spin asymmetry in quasielastic electron scattering off the deuteron with CLAS. United States. https://doi.org/10.1103/PhysRevC.95.024005
Mayer, M., Kuhn, S. E., Adhikari, K. P., Akbar, Z., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Boiarinov, S., Bosted, P., Briscoe, W. J., Brooks, W. K., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Crede, V., D'Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Dupre, R., El Alaoui, A., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Forest, T. A., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hakobyan, H., Hanretty, C., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Hyde, C. E., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jiang, H., Keith, C., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., McKinnon, B., Meekins, D., Mirazita, M., Mokeev, V., Movsisyan, A., Net, L. A., Niccolai, S., Niculescu, G., Osipenko, M., Ostrovidov, A. I., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Puckett, A. J. R., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Sabatié, F., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strauch, S., Sytnik, V., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., and Zonta, I. Fri . "Beam-target double-spin asymmetry in quasielastic electron scattering off the deuteron with CLAS". United States. https://doi.org/10.1103/PhysRevC.95.024005. https://www.osti.gov/servlets/purl/1345562.
@article{osti_1345562,
title = {Beam-target double-spin asymmetry in quasielastic electron scattering off the deuteron with CLAS},
author = {Mayer, M. and Kuhn, S. E. and Adhikari, K. P. and Akbar, Z. and Anefalos Pereira, S. and Asryan, G. and Avakian, H. and Badui, R. A. and Ball, J. and Baltzell, N. A. and Battaglieri, M. and Bedlinskiy, I. and Biselli, A. S. and Boiarinov, S. and Bosted, P. and Briscoe, W. J. and Brooks, W. K. and Bültmann, S. and Burkert, V. D. and Carman, D. S. and Celentano, A. and Charles, G. and Chetry, T. and Ciullo, G. and Clark, L. and Colaneri, L. and Cole, P. L. and Compton, N. and Contalbrigo, M. and Crede, V. and D'Angelo, A. and Dashyan, N. and De Vita, R. and De Sanctis, E. and Deur, A. and Djalali, C. and Dupre, R. and El Alaoui, A. and El Fassi, L. and Elouadrhiri, L. and Eugenio, P. and Fanchini, E. and Fedotov, G. and Fersch, R. and Filippi, A. and Fleming, J. A. and Forest, T. A. and Ghandilyan, Y. and Gilfoyle, G. P. and Giovanetti, K. L. and Girod, F. X. and Gleason, C. and Gothe, R. W. and Griffioen, K. A. and Guidal, M. and Guler, N. and Guo, L. and Hakobyan, H. and Hanretty, C. and Hattawy, M. and Hicks, K. and Holtrop, M. and Hughes, S. M. and Hyde, C. E. and Ilieva, Y. and Ireland, D. G. and Ishkhanov, B. S. and Isupov, E. L. and Jiang, H. and Keith, C. and Keller, D. and Khachatryan, G. and Khachatryan, M. and Khandaker, M. and Kim, A. and Kim, W. and Klein, A. and Kubarovsky, V. and Lanza, L. and Lenisa, P. and Livingston, K. and MacGregor, I. J. D. and McKinnon, B. and Meekins, D. and Mirazita, M. and Mokeev, V. and Movsisyan, A. and Net, L. A. and Niccolai, S. and Niculescu, G. and Osipenko, M. and Ostrovidov, A. I. and Paremuzyan, R. and Park, K. and Pasyuk, E. and Phelps, W. and Pogorelko, O. and Price, J. W. and Prok, Y. and Puckett, A. J. R. and Ripani, M. and Rizzo, A. and Rosner, G. and Rossi, P. and Sabatié, F. and Schumacher, R. A. and Sharabian, Y. G. and Skorodumina, Iu. and Smith, G. D. and Sokhan, D. and Sparveris, N. and Stankovic, I. and Stepanyan, S. and Strauch, S. and Sytnik, V. and Taiuti, M. and Tian, Ye and Torayev, B. and Ungaro, M. and Voskanyan, H. and Voutier, E. and Walford, N. K. and Weinstein, L. B. and Wood, M. H. and Zachariou, N. and Zhang, J. and Zonta, I.},
abstractNote = {Background: The deuteron plays a pivotal role in nuclear and hadronic physics, as both the simplest bound multinucleon system and as an effective neutron target. Quasielastic electron scattering on the deuteron is a benchmark reaction to test our understanding of deuteron structure and the properties and interactions of the two nucleons bound in the deuteron. Purpose: The experimental data presented here can be used to test state-of-the-art models of the deuteron and the two-nucleon interaction in the final state after two-body breakup of the deuteron. Focusing on polarization degrees of freedom, we gain information on spin-momentum correlations in the deuteron ground state (due to the D-state admixture) and on the limits of the impulse approximation (IA) picture as it applies to measurements of spin-dependent observables like spin structure functions for bound nucleons. Information on this reaction can also be used to reduce systematic uncertainties on the determination of neutron form factors or deuteron polarization through quasielastic polarized electron scattering. Method: We measured the beam-target double-spin asymmetry (A||) for quasielastic electron scattering off the deuteron at several beam energies (1.6–1.7, 2.5, 4.2, and 5.6–5.8GeV), using the CEBAF Large Acceptance Spectrometer (CLAS) at the Thomas Jefferson National Accelerator Facility. The deuterons were polarized along (or opposite to) the beam direction. The double-spin asymmetries were measured as a function of photon virtuality Q2(0.13–3.17(GeV/c)2), missing momentum (pm=0.0–0.5GeV/c), and the angle between the (inferred) spectator neutron and the momentum transfer direction (θnq). Results: The results are compared with a recent model that includes final-state interactions (FSI) using a complete parametrization of nucleon-nucleon scattering, as well as a simplified model using the plane wave impulse approximation (PWIA). We find overall good agreement with both the PWIA and FSI expectations at low to medium missing momenta (pm≤0.25GeV/c), including the change of the asymmetry due to the contribution of the deuteron D state at higher momenta. At the highest missing momenta, our data clearly agree better with the calculations including FSI. Conclusions: Final-state interactions seem to play a lesser role for polarization observables in deuteron two-body electrodisintegration than for absolute cross sections. Our data, while limited in statistical power, indicate that PWIA models work reasonably well to understand the asymmetries at lower missing momenta. In turn, this information can be used to extract the product of beam and target polarization (PbPt) from quasielastic electron-deuteron scattering, which is useful for measurements of spin observables in electron-neutron inelastic scattering. However, at the highest missing (neutron) momenta, FSI effects become important and must be accounted for.},
doi = {10.1103/PhysRevC.95.024005},
journal = {Physical Review C},
number = 2,
volume = 95,
place = {United States},
year = {Fri Feb 24 00:00:00 EST 2017},
month = {Fri Feb 24 00:00:00 EST 2017}
}

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