A new measurement of the spin-dependent structure function $g

6533b85bfe1ef96bd12bb650

RESEARCH PRODUCT

A new measurement of the spin-dependent structure function $g_{1}(x)$ of the deuteron

T. Kageya A. Staude L. Naumann T. Pussieux C. Dulya C. A. Heusch D. Peshekhonov E. Arik H. Postma Ricardo Piegaia Cristino Pérez S. Rock S. K. Dhawan Iskender Atilla Reyhancan M. Giorgi S. Ishimoto U. Stiegler L. Klostermann P. Schiavon T. O. Niinikoski T. J. Ketel A. Nagaitsev S. Lopez-ponte S. Lopez-ponte S. Lopez-ponte N. De Botton Abhay Deshpande E. P. Sichtermann A. Steinmetz L. Betev M. Lamanna E. Rondio R. Van Dantzig David Miller P. Shanahan M. Plo H. Stuhrmann A. Ogawa G.i. Smirnov R. Granier De Cassagnac H. J. Kessler Roland Windmolders J. M. Le Goff M. Clocchiatti M. K. Ballintijn A. Arvidson J. Lichtenstadt S. Platchkov G. K. Mallot S. Eichblatt J. Kyynäräinen J. Kyynäräinen T. Hasegawa J. Nassalski Yu. Kisselev M. Rodriguez I. Sabo Patrick Hautle B. E. Bonner A. Karev F. Marie R.e. Segel I.a. Savin V. G. Krivokhijine Michal Szleper A. Kishi E. M. Kabuß G. Igo Alan D. Martin J. E.j. Oberski C. S. ÖZben R. Seitz Jay Roberts M. Grosse Perdekamp T. ÇUhadar Rudiger Voss G. Bardin B. W. Mayes B. W. Mayes J. Pretz S. Bültmann J. A. Garzon J. A. Garzon J. A. Garzon Franco Bradamante Takahiro Iwata J. Zhao E. Burtin Wojciech Wislicki E. Gülmez A. Magnon J. Cranshaw G. Gracia D. Fasching J. Saborido A. Sandacz Anna Zanetti R. Birsa F. Feinstein Alessandro Bressan J. Martino D. Von Harrach Donald Crabb P. Björkholm C. Cavata Yannis K. Semertzidis J. Pyrlik J. Pyrlik Kunikazu Mori Naoaki Horikawa Regine Willumeit C. A. Whitten Mayda Velasco Lawrence Pinsky Lawrence Pinsky K. Medved J. S. Mccarthy A. Dyring F. Lehar A. Witzmann G. Van Middelkoop Aldo Penzo D. L. Adams D. Pose Ulrich Landgraf A. De Lesquen B. Badelek C. Fernandez C. Fernandez C. Fernandez N. Hayashi A. Rijllart Bernardo Adeva M. Litmaath Günter Baum P. Berglund E. Von Goeler B. Frois Roy Weinstein Roy Weinstein D. Krämer Krzysztof Kurek N. De Groot T. Matsuda M. Lowe J. Vogt J. H. Moromisato Vernon W. Hughes S. Dalla Torre F. Tessarotto F. Perrot-kunne W. Kröger

subject

Physics Nuclear and High Energy Physics Particle physics Range (particle radiation)Muon Structure function Deep inelastic scattering deep inelastic scattering; spin sum rule; SMC experiment Standard deviation Nuclear physics spin sum rule Deuterium deep inelastic scattering Sum rule in quantum mechanics SMC experiment Particle Physics - Experiment Spin-½

description

Abstract We present a new measurement of the spin-dependent structure function g 1 d of the deuteron in deep inelastic scattering of 190 GeV polarised muons on polarised deuterons, in the kinematic range 0.003 x 2 Q 2 2 . This structure function is found to be negative at small x . The first moment Γ 1 d =∫ 0 1 g 1 d d x evaluated at Q 0 2 = 10 GeV 2 is 0.034 ± 0.009 (stat.) ± 0.006 (syst.). This value is below the Ellis-Jaffe sum rule prediction by three standard deviations. Using our earlier determination of Γ 1 p , we obtain Γ 1 p − Γ 1 n = 0.199 ± 0.038 which agrees with the Bjorken sum rule.

year	journal	country	edition	language
1995-08-31

10.1016/0370-2693(95)00898-u http://cds.cern.ch/record/284908