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Related papers: Precision Determination of the Neutron Spin Struct…

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Results are reported from the HERMES experiment at HERA on a measurement of the neutron spin structure function $g_1^n(x,Q^2)$ in deep inelastic scattering using 27.5 GeV longitudinally polarized positrons incident on a polarized $^3$He…

High Energy Physics - Experiment · Physics 2008-11-26 The HERMES Collaboration , K. Ackerstaff

The neutron longitudinal and transverse asymmetries $A^n_1$ and $A^n_2$ have been extracted from deep inelastic scattering of polarized electrons by a polarized $^3$He target at incident energies of 19.42, 22.66 and 25.51 GeV. The…

High Energy Physics - Experiment · Physics 2008-11-26 The E142 Collaboration , P. L. Anthony et al

Precise measurements of the spin structure functions of the proton $g_1^p(x,Q^2)$ and deuteron $g_1^d(x,Q^2)$ are presented over the kinematic range $0.0041 \leq x \leq 0.9$ and $0.18 $ GeV$^2$ $\leq Q^2 \leq 20$ GeV$^2$. The data were…

High Energy Physics - Experiment · Physics 2012-08-03 The HERMES Collaboration , A. Airapetian

We have measured the neutron structure function g$_{2}^{n}$ and the virtual photon-nucleon asymmetry A$_{2}^{n}$ over the kinematic range $0.014\leq x \leq 0.7$ and $1.0 \leq Q^{2} \leq 17.0$ by scattering 48.3 GeV longitudinally polarized…

High Energy Physics - Experiment · Physics 2008-11-26 K. Abe

We have measured the spin-dependent structure function $g_1^p$ of the proton in deep inelastic scattering of polarized muons off polarized protons, in the kinematic range $0.003<x<0.7$ and $1\,\mbox{GeV}^2<Q^2<60\,\mbox{GeV}^2$. Its first…

High Energy Physics - Phenomenology · Physics 2010-01-15 the SMC

The experiment E155 at SLAC measured the spin structure functions g_1 and g_2 of the proton and deuteron. The experiment used deep inelastic scattering of 48.3 GeV longitudinally polarized electrons incident on polarized solid ^{15}NH_3 and…

High Energy Physics - Experiment · Physics 2007-05-23 Gregory S. Mitchell

New measurements are reported on the deuteron spin structure function g_1^d. These results were obtained from deep inelastic scattering of 48.3 GeV electrons on polarized deuterons in the kinematic range 0.01 < x < 0.9 and 1 < Q^2 < 40…

High Energy Physics - Experiment · Physics 2012-08-27 E155 Collaboration

A measurement of the proton spin structure function g1p(x,Q^2) in deep-inelastic scattering is presented. The data were taken with the 27.6 GeV longitudinally polarised positron beam at HERA incident on a longitudinally polarised pure…

High Energy Physics - Experiment · Physics 2009-04-15 A. Airapetian

The structure functions g1p and g1n have been measured over the range 0.014 < x < 0.9 and 1 < Q2 < 40 GeV2 using deep-inelastic scattering of 48 GeV longitudinally polarized electrons from polarized protons and deuterons. We find that the…

High Energy Physics - Phenomenology · Physics 2016-09-06 The E155 Collaboration , P. L. Anthony

We report on measurements of the neutron spin asymmetries $A_{1,2}^n$ and polarized structure functions $g_{1,2}^n$ at three kinematics in the deep inelastic region, with $x=0.33$, 0.47 and 0.60 and $Q^2=2.7$, 3.5 and 4.8 (GeV/c)$^2$,…

Nuclear Experiment · Physics 2009-09-29 X. Zheng

The neutron spin structure function, $g_{1n}$, has been of considerable interest recently in connection with the Bjorken sum rule and the proton spin crisis. Work on this problem has concentrated on measurements at low-$x$. We recall the…

High Energy Physics - Experiment · Physics 2010-02-17 Anthony W. Thomas

We present the first measurement of the Q^2-dependence of the neutron spin structure function g_2^n at five kinematic points covering 0.57 (GeV/c)^2 <= Q^2 <= 1.34 (GeV/c)^2 at x~0.2. Though the naive quark-parton model predicts g_2=0,…

Nuclear Experiment · Physics 2008-11-26 K. Kramer

The spin structure functions of the proton and the deuteron were measured during the EG4 experiment at Jefferson Lab in 2006. Data were collected for longitudinally polarized electron scattering off longitudinally polarized NH$_3$ and…

Nuclear Experiment · Physics 2026-01-06 A. Deur , S. E. Kuhn , M. Ripani , X. Zheng , A. G. Acar , P. Achenbach , K. P. Adhikari , J. S. Alvarado , M. J. Amaryan , W. R. Armstrong , H. Atac , H. Avakian , L. Baashen , N. A. Baltzell , L. Barion , M. Bashkanov , M. Battaglieri , B. Benkel , F. Benmokhtar , A. Bianconi , A. S. Biselli , W. A. Booth , F. B ossu , P. Bosted , S. Boiarinov , K. Th. Brinkmann , W. J. Briscoe , S. Bueltmann , V. D. Burkert , D. S. Carman , P. Chatagnon , J. P. Chen , G. Ciullo , P. L. Cole , M. Contalbrigo , V. Crede , A. D'Angelo , N. Dashyan , R. De Vita , M. Defurne , S. Diehl , C. Djalali , V. A. Drozdov , R. Dupre , H. Egiyan , A. El Alaoui , L. El Fassi , L. Elouadrhiri , P. Eugenio , J. C. Faggert , S. Fegan , R. Fersch , A. Filippi , K. Gates , G. Gavalian , G. P. Gilfoyle , R. W. Gothe , L. Guo , H. Hakobyan , M. Hattawy , F. Hauenstein , D. Heddle , A. Hobart , M. Holtrop , D. G. Ireland , E. L. Isupov , H. Jiang , H. S. Jo , S. Joosten , H. Kang , C. Keith , M. Khandaker , W. Kim , F. J. Klein , V. Klimenko , P. Konczykowski , K. Kovacs , A. Kripko , V. Kubarovsky , L. Lanza , S. Lee , P. Lenisa , X. Li , E. Long , I. J. D. MacGregor , D. Marchand , V. Mascagna , D. Matamoros , B. McKinnon , D. Meekins , S. Migliorati , T. Mineeva , M. Mirazita , V. Mokeev , C. Munoz-Camacho , P. Nadel-Turonski , T. Nagorna , K. Neupane , S. Niccolai , M. Osipenko , A. I. Ostrovidov , P. Pandey , M. Paolone , L. L. Pappalardo , R. Paremuzyan , E. Pasyuk , S. J. Paul , W. Phelps , S. K. Phillips , J. Pierce , N. Pilleux , M. Pokhrel , J. W. Price , Y. Prok , A. Radic , T. Reed , J. Richards , G. Rosner , P. Rossi , A. A. Rusova , C. Salgado , A. Schmidt , R. A. Schumacher , Y. G. Sharabian , E. V. Shirokov , U. Shrestha , S. Sirca , K. Slifer , N. Sparveris , M. Spreafico , S. Stepanyan , I. I. Strakovsky , S. Strauch , V. Sulkosky , J. A. Tan , M. Tenorio , N. Trotta , R. Tyson , M. Ungaro , D. W. Upton , S. Vallarino , L. Venturelli , H. Voskanyan , E. Voutier , D. P. Watts , X. Wei , M. H. Wood , N. Zachariou , J. Zhang , M. Zurek

The spin-structure functions $g_1$ and $g_2$, and the spin-dependent partial cross-section $\sigma_\mathrm{TT}$ have been extracted from the polarized cross-sections differences, $\Delta…

We have measured the spin structure functions $g_1$ and $g_2$ of $^3$He in a double-spin experiment by inclusively scattering polarized electrons at energies ranging from 0.862 to 5.07 GeV off a polarized $^3$He target at a 15.5$^{\circ}$…

High Energy Physics - Experiment · Physics 2012-08-27 010 Collaboration , M. Amarian , L. Auerbach , T. Averett , J. Berthot

The spin-dependent structure function of the deuteron, g_1D, is calculated within a covariant framework. The off-shell structure of the bound nucleon gives corrections to the convolution model at a level of half a percent for x below 0.7,…

High Energy Physics - Phenomenology · Physics 2016-09-01 W. Melnitchouk , G. Piller , A. W. Thomas

We have measured the spin-dependent structure function $g_1^p$ in inclusive deep-inelastic scattering of polarized muons off polarized protons, in the kinematic range $0.003 < x < 0.7$ and $1 GeV^2 < Q^2 < 60 GeV^2$. A next-to-leading order…

High Energy Physics - Experiment · Physics 2010-01-15 D. Adams

We have measured the neutron spin asymmetry $A_1^n$ with high precision at three kinematics in the deep inelastic region at $x=0.33$, 0.47 and 0.60, and $Q^2=2.7$, 3.5 and 4.8 (GeV/c)$^2$, respectively. Our results unambiguously show, for…

Nuclear Experiment · Physics 2008-11-26 X. Zheng

We review the theory and phenomenology of deep inelastic polarized lepton-nucleon scattering in the light of recent data with a deuteron target from the SMC at CERN and a Helium 3 target from the E142 experiment at SLAC. After including…

High Energy Physics - Phenomenology · Physics 2008-02-03 John Ellis , Marek Karliner

The spin structure functions g_1 for the proton and the deuteron have been measured over a wide kinematic range in x and Q2 using 1.6 and 5.7 GeV longitudinally polarized electrons incident upon polarized NH_3 and ND_3 targets at Jefferson…

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