Probing Quark-Gluon Interactions with Transverse Polarized Scattering

We have extracted QCD matrix elements from our data on doubly polarized inelastic scattering of electrons on nuclei. We find the higher twist matrix element d2˜, which arises strictly from quark-gluon interactions, to be unambiguously nonzero. The data also reveal an isospin dependence of higher twi...

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Veröffentlicht in:	Physical review letters 2010-09, Vol.105 (10)
Hauptverfasser:	Slifer, Kurt, Aghalaryan, A, Ahmidouch, A, Asaturyan, R, Bloch, F, Boeglin, W, Bosted, P, Carasco, C, Carlini, R, Cha, J, Chen, J P, Christy, M E, Cole, L, Coman, L, Crabb, D, Danagoulian, S, Day, D, Dunne, J, Elaasar, M, Ent, R, Fenker, H, Frlez, E, Gaskell, D, Gan, L, Gomez, J, Hu, B, Jourdan, J, Jones, M K, Keith, C, Keppel, C E, Khandaker, M, Klein, A, Kramer, L, Liang, Y, Lichtenstadt, J, Lindgren, R, Mack, D, McKee, P, McNulty, D, Meekins, D, Mkrtchyan, H, Nasseripour, R, Niculescu, I, Normand, K, Norum, B, Pocanic, D, Prok, Y, Raue, B, Reinhold, J, Roche, J, Kiselev, D, Savvinov, N, Sawatzky, B, Seely, M, Sick, I, Smith, C, Smith, G, Stepanyan, S, Tang, L, Tajima, S, Testa, G, Vulcan, W, Wang, K, Warren, G, Wesselmann, F R, Wood, S, Yan, C, Yuan, L, Yun, J, Zeier, M
Format:	Artikel
Sprache:	eng
Schlagworte:	CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ELECTRONS INELASTIC SCATTERING ISOSPIN MATRIX ELEMENTS MOMENTUM TRANSFER NUCLEI PHYSICS OF ELEMENTARY PARTICLES AND FIELDS QUANTUM CHROMODYNAMICS QUARK-GLUON INTERACTIONS SCATTERING SUM RULES
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Zusammenfassung:	We have extracted QCD matrix elements from our data on doubly polarized inelastic scattering of electrons on nuclei. We find the higher twist matrix element d2˜, which arises strictly from quark-gluon interactions, to be unambiguously nonzero. The data also reveal an isospin dependence of higher twist effects if we assume that the Burkhardt-Cottingham sum rule is valid. The fundamental Bjorken sum rule obtained from the a0 matrix element is satisfied at our low momentum transfer.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.105.101601