Probing quark-gluon interactions with transverse polarized scattering

K. Slifer, O. A. Rondón, A. Aghalaryan, A. Ahmidouch, R. Asaturyan, F. Bloch, W. Boeglin, P. Bosted, C. Carasco, R. Carlini, J. Cha, J. P. Chen, M. E. Christy, L. Cole, L. Coman, D. Crabb, S. Danagoulian, D. Day, J. Dunne, M. ElaasarR. Ent, H. Fenker, E. Frlez, D. Gaskell, L. Gan, J. Gomez, B. Hu, J. Jourdan, M. K. Jones, C. Keith, C. E. Keppel, M. Khandaker, A. Klein, L. Kramer, Y. Liang, J. Lichtenstadt, R. Lindgren, D. MacK, P. McKee, D. McNulty, D. Meekins, H. Mkrtchyan, R. Nasseripour, I. Niculescu, K. Normand, B. Norum, D. Pocanic, Y. Prok, B. Raue, J. Reinhold, J. Roche, D. Kiselev, N. Savvinov, B. Sawatzky, M. Seely, I. Sick, C. Smith, G. Smith, S. Stepanyan, L. Tang, S. Tajima, G. Testa, W. Vulcan, K. Wang, G. Warren, F. R. Wesselmann, S. Wood, C. Yan, L. Yuan, J. Yun, M. Zeier, H. Zhu

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish
Article number101601
JournalPhysical Review Letters
Volume105
Issue number10
DOIs
StatePublished - 2 Sep 2010

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