Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: Measurement of target and double-spin asymmetries for the e → p → → e π+ ( n ) reaction in the nucleon resonance region at low Q2

Abstract

We report measurements of target- and double-spin asymmetries for the exclusive channel $$\vec e\vec p\to e\pi^+ (n)$$ in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized NH$$_3$$ target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3 and 3.0 GeV. The new results are consistent with previous CLAS publications but are extended to a low $Q^2$ range from $0.0065$ to $0.35$ (GeV$/c$$)$$^2$. The $Q^2$ access was made possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low as $$6^\circ$$. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis prediction from SAID and the dynamic model DMT. In many kinematic regions our results, in particular results on the target asymmetry, help to constrain the polarization-dependent components of these models.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
George Washington Univ., Washington, DC (United States); Mississippi State Univ., Mississippi State, MS (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Org.:
CLAS Collaboration
OSTI Identifier:
1439598
Alternate Identifier(s):
OSTI ID: 1329346; OSTI ID: 1329530
Report Number(s):
JLAB-PHY-16-2307; DOE/OR/-23177-3890; arXiv:1607.03924
Journal ID: ISSN 2469-9985; PRVCAN; TRN: US1900628
Grant/Contract Number:  
SC0016583; FG02-07ER41528; AC05-06OR23177; ST/L005719/1; GR/T08708/01
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 4; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; pion electroproduction

Citation Formats

Zheng, X., Adhikari, K. P., Bosted, P., Deur, A., Drozdov, V., El Fassi, L., Kang, Hyekoo, Kovacs, K., Kuhn, S., Long, E., Phillips, S. K., Ripani, M., Slifer, K., Smith, L. C., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chen, J. -P., Chetry, T., Choi, Seonho, 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., Djalali, C., Dodge, G. E., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovach, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hanretty, C., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Markov, N., McKinnon, B., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Net, L. A., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J. W., Puckett, A. J. R., Raue, B. A., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., and Zonta, I. Measurement of target and double-spin asymmetries for the e→p→→eπ+(n) reaction in the nucleon resonance region at low Q2. United States: N. p., 2016. Web. doi:10.1103/PhysRevC.94.045206.
Copy to clipboard
Zheng, X., Adhikari, K. P., Bosted, P., Deur, A., Drozdov, V., El Fassi, L., Kang, Hyekoo, Kovacs, K., Kuhn, S., Long, E., Phillips, S. K., Ripani, M., Slifer, K., Smith, L. C., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chen, J. -P., Chetry, T., Choi, Seonho, 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., Djalali, C., Dodge, G. E., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovach, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hanretty, C., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Markov, N., McKinnon, B., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Net, L. A., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J. W., Puckett, A. J. R., Raue, B. A., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., & Zonta, I. Measurement of target and double-spin asymmetries for the e→p→→eπ+(n) reaction in the nucleon resonance region at low Q2. United States. https://doi.org/10.1103/PhysRevC.94.045206
Copy to clipboard
Zheng, X., Adhikari, K. P., Bosted, P., Deur, A., Drozdov, V., El Fassi, L., Kang, Hyekoo, Kovacs, K., Kuhn, S., Long, E., Phillips, S. K., Ripani, M., Slifer, K., Smith, L. C., Adikaram, D., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Badui, R. A., Ball, J., Baltzell, N. A., Battaglieri, M., Batourine, V., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Bültmann, S., Burkert, V. D., Carman, D. S., Celentano, A., Chandavar, S., Charles, G., Chen, J. -P., Chetry, T., Choi, Seonho, 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., Djalali, C., Dodge, G. E., Dupre, R., Egiyan, H., El Alaoui, A., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Fersch, R., Filippi, A., Fleming, J. A., Gevorgyan, N., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovach, E., Gothe, R. W., Griffioen, K. A., Guidal, M., Guler, N., Guo, L., Hanretty, C., Harrison, N., Hattawy, M., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Jiang, H., Jo, H. S., Joosten, S., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, F. J., Kubarovsky, V., Lanza, L., Lenisa, P., Livingston, K., MacGregor, I. J. D., Markov, N., McKinnon, B., Mirazita, M., Mokeev, V., Movsisyan, A., Munevar, E., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Net, L. A., Ni, A., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Peng, P., Pisano, S., Pogorelko, O., Price, J. W., Puckett, A. J. R., Raue, B. A., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zhang, J., and Zonta, I. Wed . "Measurement of target and double-spin asymmetries for the e→p→→eπ+(n) reaction in the nucleon resonance region at low Q2". United States. https://doi.org/10.1103/PhysRevC.94.045206. https://www.osti.gov/servlets/purl/1439598.
Copy to clipboard
@article{osti_1439598,
title = {Measurement of target and double-spin asymmetries for the e→p→→eπ+(n) reaction in the nucleon resonance region at low Q2},
author = {Zheng, X. and Adhikari, K. P. and Bosted, P. and Deur, A. and Drozdov, V. and El Fassi, L. and Kang, Hyekoo and Kovacs, K. and Kuhn, S. and Long, E. and Phillips, S. K. and Ripani, M. and Slifer, K. and Smith, L. C. and Adikaram, D. and Akbar, Z. and Amaryan, M. J. 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 Batourine, V. and Bedlinskiy, I. and Biselli, A. S. and Briscoe, W. J. and Bültmann, S. and Burkert, V. D. and Carman, D. S. and Celentano, A. and Chandavar, S. and Charles, G. and Chen, J. -P. and Chetry, T. and Choi, Seonho 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 Djalali, C. and Dodge, G. E. and Dupre, R. and Egiyan, H. and El Alaoui, A. and Elouadrhiri, L. and Eugenio, P. and Fanchini, E. and Fedotov, G. and Fersch, R. and Filippi, A. and Fleming, J. A. and Gevorgyan, N. and Ghandilyan, Y. and Gilfoyle, G. P. and Giovanetti, K. L. and Girod, F. X. and Gleason, C. and Golovach, E. and Gothe, R. W. and Griffioen, K. A. and Guidal, M. and Guler, N. and Guo, L. and Hanretty, C. and Harrison, N. and Hattawy, M. and Hicks, K. and Holtrop, M. and Hughes, S. M. and Ilieva, Y. and Ireland, D. G. and Ishkhanov, B. S. and Isupov, E. L. and Jenkins, D. and Jiang, H. and Jo, H. S. and Joosten, S. and Keller, D. and Khachatryan, G. and Khandaker, M. and Kim, A. and Kim, W. and Klein, F. J. and Kubarovsky, V. and Lanza, L. and Lenisa, P. and Livingston, K. and MacGregor, I. J. D. and Markov, N. and McKinnon, B. and Mirazita, M. and Mokeev, V. and Movsisyan, A. and Munevar, E. and Munoz Camacho, C. and Murdoch, G. and Nadel-Turonski, P. and Net, L. A. and Ni, A. and Niccolai, S. and Niculescu, G. and Niculescu, I. and Osipenko, M. and Ostrovidov, A. I. and Paolone, M. and Paremuzyan, R. and Park, K. and Pasyuk, E. and Peng, P. and Pisano, S. and Pogorelko, O. and Price, J. W. and Puckett, A. J. R. and Raue, B. A. and Rizzo, A. and Rosner, G. and Rossi, P. and Roy, P. and Sabatié, F. and Salgado, C. 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 Strakovsky, I. I. and Strauch, S. and Taiuti, M. and Tian, Ye and Ungaro, M. and Voskanyan, H. and Voutier, E. and Walford, N. K. and Watts, D. P. and Wei, X. and Weinstein, L. B. and Wood, M. H. and Zachariou, N. and Zhang, J. and Zonta, I.},
abstractNote = {We report measurements of target- and double-spin asymmetries for the exclusive channel $\vec e\vec p\to e\pi^+ (n)$ in the nucleon resonance region at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS). These asymmetries were extracted from data obtained using a longitudinally polarized NH$_3$ target and a longitudinally polarized electron beam with energies 1.1, 1.3, 2.0, 2.3 and 3.0 GeV. The new results are consistent with previous CLAS publications but are extended to a low $Q^2$ range from $0.0065$ to $0.35$ (GeV$/c$)$^2$. The $Q^2$ access was made possible by a custom-built Cherenkov detector that allowed the detection of electrons for scattering angles as low as $6^\circ$. These results are compared with the unitary isobar models JANR and MAID, the partial-wave analysis prediction from SAID and the dynamic model DMT. In many kinematic regions our results, in particular results on the target asymmetry, help to constrain the polarization-dependent components of these models.},
doi = {10.1103/PhysRevC.94.045206},
journal = {Physical Review C},
number = 4,
volume = 94,
place = {United States},
year = {Wed Oct 19 00:00:00 EDT 2016},
month = {Wed Oct 19 00:00:00 EDT 2016}
}
Copy to clipboard
Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevC.94.045206
Copyright Statement
Other availability
Search WorldCat Search WorldCat to find libraries that may hold this journal
Citation Metrics:
Cited by: 6 works
Citation information provided by
Web of Science
Save / Share:
Export Metadata
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.

Works referenced in this record:

Lattice QCD: Concepts, Techniques and Some Results
journal, January 2014

Helicity and isospin asymmetries in the electroproduction of nucleon resonances
journal, October 1990

Unitary isobar model --MAID2007
journal, October 2007

Photo- and electroproduction of nonstrange baryon resonances in the relativized quark model
journal, October 1992

Measurement of the polarized structure function σ L T ′ for p ( e ⃗ , e ′ π + ) n in the Δ ( 1232 ) resonance region
journal, October 2004

The CEBAF large acceptance spectrometer (CLAS)
journal, May 2003

  • Mecking, B. A.; Adams, G.; Ahmad, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 503, Issue 3
  • DOI: 10.1016/S0168-9002(03)01001-5

Review of Particle Physics
journal, July 2012

Electromagnetic Meson Production in the Nucleon Resonance Region
journal, December 2004

Electroexcitation of nucleon resonances
journal, January 2012

The CLAS Cherenkov detector
journal, June 2001

  • Adams, G.; Burkert, V.; Carl, R.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 465, Issue 2-3
  • DOI: 10.1016/S0168-9002(00)01313-9

Precision measurement of the neutron spin asymmetries and spin-dependent structure functions in the valence quark region
journal, December 2004

Double spin asymmetry in π+ electroproduction with CLAS
journal, February 2002

QED radiative corrections in processes of exclusive pion electroproduction
journal, October 2002

Generalized Drell–Hearn–Gerasimov sum rule
journal, March 2001

Measurements of the proton and deuteron spin structure functions g 1 and g 2
journal, October 1998

Single quark transition model analysis of electromagnetic nucleon resonance excitations in the [ 7 0 ,   1 − ] supermultiplet
journal, March 2003

Pion Cloud and the Q 2 Dependence of γ * N ↔ Δ Transition Form Factors
journal, November 1999

First Measurement of the Helicity Asymmetry for γ p → p π 0 in the Resonance Region
journal, January 2014

e p → ep π 0 reaction studied in the Δ ( 1232 ) mass region using polarization asymmetries
journal, September 2003

Corrections to nucleon spin structure asymmetries measured on nuclear polarized targets
journal, July 1999

Ultraviolet Behavior of Non-Abelian Gauge Theories
journal, June 1973

Reliable Perturbative Results for Strong Interactions?
journal, June 1973

Precision Measurement of the Neutron Spin Asymmetry A 1 n and Spin-Flavor Decomposition in the Valence Quark Region
journal, January 2004

Helicity asymmetry measurement for π0 photoproduction on the CLAS frozen spin target
conference, January 2016

  • Schott, Diane; Briscoe, William; Strakovsky, Igor
  • AIP Conference Proceedings
  • DOI: 10.1063/1.4949399

Threshold pion electroproduction in chiral perturbation theory
journal, October 1994

Threshold neutral pion electroproduction in heavy baryon chiral perturbation theory
journal, September 1996

Exact Sum Rule for Nucleon Magnetic Moments
journal, May 1966

Measurement of proton and nitrogen polarization in ammonia and a test of equal spin temperature
journal, December 1998

  • Adeva, B.; Arik, E.; Arvidson, A.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 419, Issue 1
  • DOI: 10.1016/S0168-9002(98)00916-4

Light-weight spherical mirrors for Cherenkov detectors
journal, January 2003

  • Cisbani, E.; Colilli, S.; Crateri, R.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 496, Issue 2-3
  • DOI: 10.1016/S0168-9002(02)01747-3

Baryon resonance analysis from SAID
journal, December 2009

Kenneth Wilson and Lattice QCD
journal, February 2015

Helicity asymmetry E measurement for single π0 photoproduction with a frozen spin target
conference, January 2012

  • Iwamoto, Hideko
  • THE 8TH INTERNATIONAL WORKSHOP ON THE PHYSICS OF EXCITED NUCLEONS: NSTAR 2011, AIP Conference Proceedings
  • DOI: 10.1063/1.3701229

Empirical fit to the nucleon electromagnetic form factors
journal, January 1995

Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction
journal, November 2009

The Virginia/Basel/SLAC polarized target: operation and performance during experiment E143 at SLAC
journal, March 1995

  • Crabb, D. G.; Day, D. B.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 356, Issue 1
  • DOI: 10.1016/0168-9002(94)01436-1

First Measurement of the Double Spin Asymmetry in e → p → → e ′ π + n in the Resonance Region
journal, February 2002

A polarized target for the CLAS detector
journal, April 2003

  • Keith, C. D.; Anghinolfi, M.; Battaglieri, M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 501, Issue 2-3
  • DOI: 10.1016/S0168-9002(03)00429-7
    Sort by:
    [ × clear filter / sort ]

    Works referencing / citing this record:

    The spin structure of the nucleon
    journal, June 2019

    • Deur, Alexandre; Brodsky, Stanley J.; de Téramond, Guy F.
    • Reports on Progress in Physics, Vol. 82, Issue 7
    • DOI: 10.1088/1361-6633/ab0b8f

    The spin structure of the nucleon
    journal, January 2005

    • Kabuss, Eva-Maria
    • Czechoslovak Journal of Physics, Vol. 55, Issue S1
    • DOI: 10.1007/bf03031986

    The spin structure of the nucleon
    journal, January 1994

    The Spin Structure of the Nucleon: Proceeding of International School of Nucleon Structure: 1st Course
    conference, April 2017

    • Frois, B.; Hughes, V. W.; de Groot, N.
    • International School of Nucleon Structure, The Spin Structure of the Nucleon
    • DOI: 10.1142/9789814529051
      Sort by:
      [ × clear filter / sort ]

      Similar Records in DOE PAGES and OSTI.GOV collections: