DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Determination of the proton spin structure functions for 0.05 < Q2 < 5 GeV 2 using CLAS

Abstract

In this work, we present the results of our final analysis of the full data set of g$$p\atop{1}$$ (Q2), the spin structure function of the proton, collected using CLAS at Jefferson Laboratory in 2000–2001. Polarized electrons with energies of 1.6, 2.5, 4.2, and 5.7 GeV were scattered from proton targets (15NH3 dynamically polarized along the beam direction) and detected with CLAS. From the measured double spin asymmetries, we extracted virtual photon asymmetries A$$p\atop{1}$$ and A$$p\atop{2}$$ and spin structure functions g$$p\atop{1}$$ and g$$p\atop{2}$$ over a wide kinematic range (0.05 GeV2 < Q2 < 5 GeV2 and 1.08 GeV < W < 3 GeV) and calculated moments of g$$p\atop{1}$$. We compare our final results with various theoretical models and expectations, as well as with parametrizations of the world data. Lastly, our data, with their precision and dense kinematic coverage, are able to constrain fits of polarized parton distributions, test pQCD predictions for quark polarizations at large x, offer a better understanding of quark-hadron duality, and provide more precise values of higher twist matrix elements in the framework of the operator product expansion.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; more »; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; « less
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Mississippi State Univ., Mississippi State, MS (United States); George Washington Univ., Washington, DC (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Instituto Nazionale di Fisica Nucleare (INFN)
Contributing Org.:
CLAS Collaboration
OSTI Identifier:
1416726
Alternate Identifier(s):
OSTI ID: 1414981; OSTI ID: 1421957; OSTI ID: 1604275
Report Number(s):
JLAB-PHY-17-2511; DOE/OR/23177-4185; arXiv:1706.10289
Journal ID: ISSN 2469-9985; TRN: US1800959
Grant/Contract Number:  
AC05-06OR23177; FG02-07ER41528; SC0016583; AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 96; Journal Issue: 6; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Spin structure functions; nucleon structure; CLAS Collaboration

Citation Formats

Fersch, R. G., Guler, N., Bosted, P., Deur, A., Griffioen, K., Keith, C., Kuhn, S. E., Minehart, R., Prok, Y., Adhikari, K. P., Adhikari, S., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Ball, J., Balossino, I., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Bültmann, S., Burkert, V. D., Thanh Cao, Frank, Carman, D. S., Careccia, S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Cortes, O., 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., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Filippi, A., Fleming, J. A., Forest, T. A., Garçon, M., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovatch, E., Gothe, R. W., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Joo, K., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Lagerquist, V. G., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pierce, J., Pisano, S., Pogorelko, O., Price, J. W., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Zachariou, N., and Zhang, J. Determination of the proton spin structure functions for 0.05<Q2<5GeV2 using CLAS. United States: N. p., 2017. Web. doi:10.1103/PhysRevC.96.065208.
Fersch, R. G., Guler, N., Bosted, P., Deur, A., Griffioen, K., Keith, C., Kuhn, S. E., Minehart, R., Prok, Y., Adhikari, K. P., Adhikari, S., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Ball, J., Balossino, I., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Bültmann, S., Burkert, V. D., Thanh Cao, Frank, Carman, D. S., Careccia, S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Cortes, O., 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., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Filippi, A., Fleming, J. A., Forest, T. A., Garçon, M., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovatch, E., Gothe, R. W., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Joo, K., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Lagerquist, V. G., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pierce, J., Pisano, S., Pogorelko, O., Price, J. W., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Zachariou, N., & Zhang, J. Determination of the proton spin structure functions for 0.05<Q2<5GeV2 using CLAS. United States. https://doi.org/10.1103/PhysRevC.96.065208
Fersch, R. G., Guler, N., Bosted, P., Deur, A., Griffioen, K., Keith, C., Kuhn, S. E., Minehart, R., Prok, Y., Adhikari, K. P., Adhikari, S., Akbar, Z., Amaryan, M. J., Anefalos Pereira, S., Asryan, G., Avakian, H., Ball, J., Balossino, I., Baltzell, N. A., Battaglieri, M., Bedlinskiy, I., Biselli, A. S., Briscoe, W. J., Brooks, W. K., Bültmann, S., Burkert, V. D., Thanh Cao, Frank, Carman, D. S., Careccia, S., Celentano, A., Chandavar, S., Charles, G., Chetry, T., Ciullo, G., Clark, L., Colaneri, L., Cole, P. L., Compton, N., Contalbrigo, M., Cortes, O., 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., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fanchini, E., Fedotov, G., Filippi, A., Fleming, J. A., Forest, T. A., Garçon, M., Gavalian, G., Ghandilyan, Y., Gilfoyle, G. P., Giovanetti, K. L., Girod, F. X., Gleason, C., Golovatch, E., Gothe, R. W., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Heddle, D., Hicks, K., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jenkins, D., Joo, K., Keller, D., Khachatryan, G., Khachatryan, M., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Kubarovsky, V., Lagerquist, V. G., Lanza, L., Lenisa, P., Livingston, K., Lu, H. Y., McKinnon, B., Meyer, C. A., Mirazita, M., Mokeev, V., Montgomery, R. A., Movsisyan, A., Munoz Camacho, C., Murdoch, G., Nadel-Turonski, P., Niccolai, S., Niculescu, G., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Paremuzyan, R., Park, K., Pasyuk, E., Phelps, W., Pierce, J., Pisano, S., Pogorelko, O., Price, J. W., Protopopescu, D., Raue, B. A., Ripani, M., Riser, D., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schumacher, R. A., Sharabian, Y. G., Simonyan, A., Skorodumina, Iu., Smith, G. D., Sokhan, D., Sparveris, N., Stankovic, I., Stepanyan, S., Strakovsky, I. I., Strauch, S., Taiuti, M., Tian, Ye, Torayev, B., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Zachariou, N., and Zhang, J. Wed . "Determination of the proton spin structure functions for 0.05<Q2<5GeV2 using CLAS". United States. https://doi.org/10.1103/PhysRevC.96.065208. https://www.osti.gov/servlets/purl/1416726.
@article{osti_1416726,
title = {Determination of the proton spin structure functions for 0.05<Q2<5GeV2 using CLAS},
author = {Fersch, R. G. and Guler, N. and Bosted, P. and Deur, A. and Griffioen, K. and Keith, C. and Kuhn, S. E. and Minehart, R. and Prok, Y. and Adhikari, K. P. and Adhikari, S. and Akbar, Z. and Amaryan, M. J. and Anefalos Pereira, S. and Asryan, G. and Avakian, H. and Ball, J. and Balossino, I. and Baltzell, N. A. and Battaglieri, M. and Bedlinskiy, I. and Biselli, A. S. and Briscoe, W. J. and Brooks, W. K. and Bültmann, S. and Burkert, V. D. and Thanh Cao, Frank and Carman, D. S. and Careccia, S. and Celentano, A. and Chandavar, S. 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 Cortes, O. 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 El Fassi, L. and Elouadrhiri, L. and Eugenio, P. and Fanchini, E. and Fedotov, G. and Filippi, A. and Fleming, J. A. and Forest, T. A. and Garçon, M. and Gavalian, G. and Ghandilyan, Y. and Gilfoyle, G. P. and Giovanetti, K. L. and Girod, F. X. and Gleason, C. and Golovatch, E. and Gothe, R. W. and Guidal, M. and Guo, L. and Hafidi, K. and Hakobyan, H. and Hanretty, C. and Harrison, N. and Hattawy, M. and Heddle, D. 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 Joo, K. and Keller, D. and Khachatryan, G. and Khachatryan, M. and Khandaker, M. and Kim, A. and Kim, W. and Klein, A. and Klein, F. J. and Kubarovsky, V. and Lagerquist, V. G. and Lanza, L. and Lenisa, P. and Livingston, K. and Lu, H. Y. and McKinnon, B. and Meyer, C. A. and Mirazita, M. and Mokeev, V. and Montgomery, R. A. and Movsisyan, A. and Munoz Camacho, C. and Murdoch, G. and Nadel-Turonski, P. 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 Phelps, W. and Pierce, J. and Pisano, S. and Pogorelko, O. and Price, J. W. and Protopopescu, D. and Raue, B. A. and Ripani, M. and Riser, D. 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 Simonyan, A. and Skorodumina, Iu. and Smith, G. D. and Sokhan, D. and Sparveris, N. and Stankovic, I. and Stepanyan, S. and Strakovsky, I. I. and Strauch, S. and Taiuti, M. and Tian, Ye and Torayev, B. 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 Zachariou, N. and Zhang, J.},
abstractNote = {In this work, we present the results of our final analysis of the full data set of g$p\atop{1}$ (Q2), the spin structure function of the proton, collected using CLAS at Jefferson Laboratory in 2000–2001. Polarized electrons with energies of 1.6, 2.5, 4.2, and 5.7 GeV were scattered from proton targets (15NH3 dynamically polarized along the beam direction) and detected with CLAS. From the measured double spin asymmetries, we extracted virtual photon asymmetries A$p\atop{1}$ and A$p\atop{2}$ and spin structure functions g$p\atop{1}$ and g$p\atop{2}$ over a wide kinematic range (0.05 GeV2 < Q2 < 5 GeV2 and 1.08 GeV < W < 3 GeV) and calculated moments of g$p\atop{1}$. We compare our final results with various theoretical models and expectations, as well as with parametrizations of the world data. Lastly, our data, with their precision and dense kinematic coverage, are able to constrain fits of polarized parton distributions, test pQCD predictions for quark polarizations at large x, offer a better understanding of quark-hadron duality, and provide more precise values of higher twist matrix elements in the framework of the operator product expansion.},
doi = {10.1103/PhysRevC.96.065208},
journal = {Physical Review C},
number = 6,
volume = 96,
place = {United States},
year = {Wed Dec 27 00:00:00 EST 2017},
month = {Wed Dec 27 00:00:00 EST 2017}
}

Journal Article:

Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

Figures / Tables:

FIG. 1 FIG. 1: An internal view of the target chamber, viewed from upstream, showing the orange transparent Kapton cylindrical LHe minicup into which the target stick was inserted. Note the metal “horn,” the source of microwave emission, on the left side.

Save / Share:

Works referenced in this record:

Measurement of the virtual-photon asymmetry A 2 and the spin-structure function g 2 of the proton
journal, March 2012


Development of a high average current polarized electron source with long cathode operational lifetime
journal, February 2007

  • Sinclair, C. K.; Adderley, P. A.; Dunham, B. M.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 10, Issue 2
  • DOI: 10.1103/PhysRevSTAB.10.023501

Ratios of N 15 / C 12 and He 4 / C 12 inclusive electroproduction cross sections in the nucleon resonance region
journal, July 2008


The αS3 approximation of quantum chromodynamics to the Ellis-Jaffe sum rule
journal, July 1997


On an Alternative Decay Process for the Neutral  -Meson
journal, July 1951


Review of Particle Physics
journal, July 2006


Theory of power corrections to deep inelastic scattering in quantum chromodynamics
journal, June 1982


Role of g 2 in relating the Schwinger and Gerasimov-Drell-Hearn sum rules
journal, May 1993


Experimental Constraints on Polarizability Corrections to Hydrogen Hyperfine Structure
journal, April 2006


First Measurement of the Gerasimov-Drell-Hearn Sum Rule for H 1 from 0.7 to 1.8 GeV at ELSA
journal, November 2003


Impact of CLAS and COMPASS data on polarized parton densities and higher twist
journal, April 2007

  • Leader, Elliot; Sidorov, Aleksander V.; Stamenov, Dimiter B.
  • Physical Review D, Vol. 75, Issue 7
  • DOI: 10.1103/PhysRevD.75.074027

Quark-hadron duality in spin structure functions g 1 p and g 1 d
journal, March 2007


A Møller polarimeter for CW and pulsed intermediate energy electron beams
journal, September 1990

  • Wagner, B.; Andresen, H. G.; Steffens, K. H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 294, Issue 3
  • DOI: 10.1016/0168-9002(90)90296-I

Demythification of electroproduction local duality and precocious scaling
journal, February 1977


First Measurement of the Gerasimov-Drell-Hearn Integral for H 1 from 200 to 800 MeV
journal, June 2001


Scaling, Duality, and the Behavior of Resonances in Inelastic Electron-Proton Scattering
journal, October 1970


Unitary isobar (MAID) and dynamical models for pion electroproduction
journal, March 2001


Minuit - a system for function minimization and analysis of the parameter errors and correlations
journal, December 1975


The spin and flavour dependence of high-energy photoabsorption
journal, March 1999

  • Bass, S. D.; Brisudová, M. M.
  • The European Physical Journal A, Vol. 4, Issue 3
  • DOI: 10.1007/s100500050228

Iterative Monte Carlo analysis of spin-dependent parton distributions
journal, April 2016


Measurement of Asymmetry in Spin-Dependent e p Resonance-Region Scattering
journal, December 1980


QCD sum rule calculation of twist-4 corrections to Bjorken and Ellis-Jaffe sum rules
journal, June 1995


Spin-dependent twist-4 matrix elements from the instanton vacuum: Flavor-singlet and nonsinglet
journal, January 2002


Quark–hadron duality in electron scattering
journal, January 2005


Applications of the Chiral U ( 6 ) U ( 6 ) Algebra of Current Densities
journal, August 1966


Proton Spin Structure in the Resonance Region
journal, March 2007


Nuclear charge-density-distribution parameters from elastic electron scattering
journal, May 1987


Precise determination of the deuteron spin structure at low to moderate Q 2 with CLAS and extraction of the neutron contribution
journal, November 2015


Radiative Corrections to Elastic and Inelastic ep and up Scattering
journal, January 1969


Spin structure of the nucleon—status and recent results
journal, July 2009

  • Kuhn, S. E.; Chen, J. -P.; Leader, E.
  • Progress in Particle and Nuclear Physics, Vol. 63, Issue 1
  • DOI: 10.1016/j.ppnp.2009.02.001

The spin structure function g 1 p of the proton and a test of the Bjorken sum rule
journal, February 2016


Measurement of the Spin Asymmetry in the Photoproduction of Pairs of High- p T Hadrons at HERMES
journal, March 2000


Theory of power corrections to deep inelastic scattering in quantum chromodynamics (I). Q −2 effects
journal, June 1982


Empirical fit to precision inclusive electron-proton cross sections in the resonance region
journal, May 2010


Spin asymmetry <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msubsup><mml:mi>A</mml:mi><mml:mn>1</mml:mn><mml:mi>d</mml:mi></mml:msubsup></mml:math> and the spin-dependent structure function <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msubsup><mml:mi>g</mml:mi><mml:mn>1</mml:mn><mml:mi>d</mml:mi></mml:msubsup></mml:math> of the deuteron at low values of x and <mml:math altimg="si3.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>
journal, April 2007


A unitary isobar model for pion photo- and electroproduction on the proton up to 1 GeV
journal, January 1999


OPE analysis for polarized deep inelastic scattering
journal, March 1994


Measurement of the Proton and Deuteron Spin Structure Function g 1 in the Resonance Region
journal, February 1997


Sum rules for spin-dependent electroproduction- test of relativistic constituent quarks
journal, December 1977


Asymptotic freedom in parton language
journal, August 1977


Spin observables and spin structure functions: Inequalities and dynamics
journal, January 2009


Experimental study of isovector spin sum rules
journal, August 2008


Characterization of the CEBAF 100kV DC GaAs photoelectron gun vacuum system
journal, May 2007

  • Stutzman, M. L.; Adderley, P.; Brittian, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 574, Issue 2
  • DOI: 10.1016/j.nima.2007.01.170

Q 2 Evolution of the Neutron Spin Structure Moments using a H e 3 Target
journal, January 2004


Generalized Drell-Hearn-Gerasimov sum rule at order ) in chiral perturbation theory
journal, January 2000


T HE C ONTINUOUS E LECTRON B EAM A CCELERATOR F ACILITY : CEBAF at the Jefferson Laboratory
journal, December 2001


The EMC effect
journal, July 2003


Measurement of the proton spin structure function g1p with a pure hydrogen target
journal, December 1998


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


Study of instanton contributions to moments of nucleon spin-dependent structure functions
journal, March 1999


Generalized sum rules of the nucleon in the constituent quark model
journal, November 2004


Calculations of higher twist distribution functions in the MIT bag model
journal, July 1997


Inelastic Scattering of Polarized Leptons from Polarized Nucleons
journal, March 1970


What do we know about the Q 2 evolution of the Gerasimov-Drell-Hearn sum rule?
journal, January 1993


Sum Rules and Moments of the Nucleon spin Structure Functions
journal, November 2005


Measurement of inclusive spin structure functions of the deuteron
journal, May 2003


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

Radiative effects in deep inelastic scattering of polarized leptons by polarized nucleons
journal, June 1983


Precision measurements of g 1 of the proton and of the deuteron with 6 GeV electrons
journal, August 2014


Valence quark spin distribution functions
journal, January 1999


Measurement of G E p / G M p in e p e p to Q 2 = 5.6 GeV 2
journal, February 2002


Deep inelastic scattering of polarized electrons by polarized He 3 and the study of the neutron spin structure
journal, December 1996


Space-charge effects on bunching of electrons in the CEBAF injector
journal, December 1997

  • Liu, H.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 400, Issue 2-3
  • DOI: 10.1016/S0168-9002(97)00960-1

Effect of Orbital Angular Momentum on Valence-Quark Helicity Distributions
journal, August 2007


Measurements of d 2 n and A 1 n : Probing the neutron spin structure
journal, September 2016


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

The CLAS forward electromagnetic calorimeter
journal, March 2001

  • Amarian, M.; Asryan, G.; Beard, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 460, Issue 2-3
  • DOI: 10.1016/S0168-9002(00)00996-7

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

Review of Particle Physics
journal, August 2014


Positivity constraints for anomalous dimensions
journal, October 1973


Moments of the spin structure functions <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msubsup><mml:mi>g</mml:mi><mml:mn>1</mml:mn><mml:mi>p</mml:mi></mml:msubsup></mml:math> and <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msubsup><mml:mi>g</mml:mi><mml:mn>1</mml:mn><mml:mi>d</mml:mi></mml:msubsup></mml:math> for <mml:math altimg="si3.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mn>0.05</mml:mn><mml:mo><</mml:mo><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup><mml:mo><</mml:mo><mml:mn>3.0</mml:mn><mml:msup><mml:mtext> GeV</mml:mtext><mml:mn>2</mml:mn></mml:msup></mml:math>
journal, February 2009


On the Q2 variation of spin-dependent deep-inelastic electron-proton scattering
journal, December 1992


The Gerasimov–Drell–Hearn sum rule
journal, October 2006


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


An investigation of the spin structure of the proton in deep inelastic scattering of polarised muons on polarised protons
journal, December 1989


Quark-Hadron Duality in Neutron ( He 3 ) Spin Structure
journal, October 2008


Flavor decomposition of the polarized quark distributions in the nucleon from inclusive and semi-inclusive deep-inelastic scattering
journal, October 1999


An explanation of local duality and precocious scaling
journal, October 1976


The deuteron spin-dependent structure function <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msubsup><mml:mi>g</mml:mi><mml:mn>1</mml:mn><mml:mi>d</mml:mi></mml:msubsup></mml:math> and its first moment
journal, March 2007


QCD constraints on the shape of polarized quark and gluon distributions
journal, May 1995


Implications of the discrepancy between proton form factor measurements
journal, February 2004


Sum rules for forward virtual compton scattering
journal, February 1970


Measurements of the elastic electromagnetic form factor ratio μ p G Ep / G Mp via polarization transfer
journal, August 2001


The time-of-flight system for CLAS
journal, August 1999

  • Smith, E. S.; Carstens, T.; Distelbrink, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 432, Issue 2-3
  • DOI: 10.1016/S0168-9002(99)00484-2

Measurements of the Q2-dependence of the proton and neutron spin structure functions g1p and g1n
journal, November 2000


Target mass corrections for polarized structure functions and new sum rules
journal, July 1999


Measurement of the Proton Spin Structure Function g 1 ( x , Q 2 ) for Q 2 from 0.15 to 1.6 G e V 2 with CLAS
journal, November 2003


Experimental Determination of the Evolution of the Bjorken Integral at Low Q 2
journal, November 2004


QCD analysis of polarized deep-inelastic scattering data and parton distributions
journal, August 2002


Review of Particle Properties
journal, July 2002


Precise determination of the spin structure function g 1 of the proton, deuteron, and neutron
journal, January 2007


Electroexcitation of nucleon resonances
journal, January 2012


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


Precision Determination of the Neutron Spin Structure Function g 1 n
journal, July 1997


Spin structure of the nucleon at low energies
journal, April 2003


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


Higher twists and color polarizabilities in the neutron
journal, May 2005


The spin structure of the nucleon
journal, April 2013

  • Aidala, Christine A.; Bass, Steven D.; Hasch, Delia
  • Reviews of Modern Physics, Vol. 85, Issue 2
  • DOI: 10.1103/RevModPhys.85.655

Precision measurement of the proton and deuteron spin structure functions g2 and asymmetries A2
journal, January 2003


Solid Polarized Targets for Nuclear and Particle Physics Experiments
journal, December 1997


The statistical parton distributions: status and prospects
journal, June 2005


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


High precision determination of the Q 2 evolution of the Bjorken sum
journal, July 2014


Q 2 Dependence of the Neutron Spin Structure Function g 2 n at Low Q 2
journal, September 2005


QCD radiative and power corrections and generalized Gerasimov-Drell-Hearn sum rules
journal, December 2004


Bethe-Heitler process in polarized photon-nucleon interactions
journal, November 1997


Nucleon spin structure and perturbative QCD frontier on the move
journal, January 2010


Pion and Nucleon Structure Functions near x = 1
journal, November 1975


Power corrections 1/Q2to parton sum rules for deep inelastic scattering from polarized nucleons
journal, June 1990


Global analysis of proton elastic form factor data with two-photon exchange corrections
journal, September 2007


Measurement of the deuteron spin structure function g1d(x) for 1 (GeV/c)2<Q2<40 (GeV/c)2
journal, September 1999


Exact Sum Rule for Nucleon Magnetic Moments
journal, May 1966


Spin asymmetries A 1 and structure functions g 1 of the proton and the deuteron from polarized high energy muon scattering
journal, October 1998


The CLAS drift chamber system
journal, July 2000

  • Mestayer, M. D.; Carman, D. S.; Asavapibhop, B.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 449, Issue 1-2
  • DOI: 10.1016/S0168-9002(00)00151-0

Signatures of chiral dynamics in low-energy Compton scattering off the nucleon
journal, May 2004

  • Hildebrandt, R. P.; Grießhammer, H. W.; Hemmert, T. R.
  • The European Physical Journal A, Vol. 20, Issue 2
  • DOI: 10.1140/epja/i2003-10144-9

Moments of nucleon structure functions at next-to-leading order in baryon chiral perturbation theory
journal, November 2014


The origins of quark–hadron duality: how does the square of the sum become the sum of the squares?
journal, June 2001


Measurement of the x- and <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msup><mml:mi>Q</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>-dependence of the asymmetry <mml:math altimg="si2.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:msub><mml:mi>A</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math> on the nucleon
journal, September 2006


Works referencing / citing this record:

Quark-Hadron Duality of Spin Structure Functions in CLAS EG1b Data
journal, July 2018


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

Two-photon exchange correction to the Lamb shift and hyperfine splitting of S levels
journal, May 2019


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