[Formula presented] Dependence of Quadrupole Strength in the [Formula presented] Transition

K. Joo, L. C. Smith, V. D. Burkert, R. Minehart, I. G. Aznauryan, L. Elouadrhiri, S. Stepanyan, G. S. Adams, M. J. Amaryan, E. Anciant, M. Anghinolfi, D. S. Armstrong, B. Asavapibhop, G. Audit, T. Auger, H. Avakian, S. Barrow, H. Bagdasaryan, M. Battaglieri, K. BeardM. Bektasoglu, W. Bertozzi, N. Bianchi, A. S. Biselli, S. Boiarinov, B. E. Bonner, W. K. Brooks, J. R. Calarco, G. P. Capitani, D. S. Carman, B. Carnahan, P. L. Cole, A. Coleman, D. Cords, P. Corvisiero, D. Crabb, H. Crannell, J. Cummings, E. De Sanctis, R. De Vita, P. V. Degtyarenko, R. A. Demirchyan, H. Denizli, L. C. Dennis, A. Deppman, K. V. Dharmawardane, K. S. Dhuga, C. Djalali, G. E. Dodge, D. Doughty, P. Dragovitsch, Michael Dugger, S. Dytman, M. Eckhause, Y. V. Efremenko, H. Egiyan, K. S. Egiyan, L. Farhi, R. J. Feuerbach, J. Ficenec, K. Fissum, T. A. Forest, H. Funsten, M. Gai, V. B. Gavrilov, S. Gilad, G. P. Gilfoyle, K. L. Giovanetti, P. Girard, K. A. Griffioen, M. Guidal, M. Guillo, V. Gyurjyan, D. Hancock, J. Hardie, D. Heddle, J. Heisenberg, F. W. Hersman, K. Hicks, R. S. Hicks, M. Holtrop, C. E. Hyde-Wright, M. M. Ito, D. Jenkins, J. H. Kelley, M. Khandaker, K. Y. Kim, W. Kim, A. Klein, F. J. Klein, M. Klusman, M. Kossov, Y. Kuang, S. E. Kuhn, J. M. Laget, D. Lawrence, A. Longhi, K. Loukachine, M. Lucas, R. W. Major, J. J. Manak, C. Marchand, S. K. Matthews, S. McAleer, J. W.C. McNabb, B. A. Mecking, M. D. Mestayer, C. A. Meyer, M. Mirazita, R. Miskimen, V. Muccifora, J. Mueller, G. S. Mutchler, J. Napolitano, G. Niculescu, B. Niczyporuk, R. A. Niyazov, M. S. Ohandjanyan, A. Opper, Y. Patois, G. A. Peterson, S. Philips, N. Pivnyuk, D. Pocanic, O. Pogorelko, E. Polli, B. M. Preedom, J. W. Price, L. M. Qin, B. A. Raue, A. R. Reolon, G. Riccardi, G. Ricco, M. Ripani, Barry Ritchie, F. Ronchetti, P. Rossi, D. Rowntree, P. D. Rubin, C. W. Salgado, M. Sanzone, V. Sapunenko, M. Sargsyan, R. A. Schumacher, Y. G. Sharabian, J. Shaw, S. M. Shuvalov, A. Skabelin, E. S. Smith, T. Smith, D. I. Sober, M. Spraker, P. Stoler, M. Taiuti, S. Taylor, D. Tedeschi, R. Thompson, L. Todor, T. Y. Tung, M. F. Vineyard, A. Vlassov, H. Weller, L. B. Weinstein, R. Welsh, D. P. Weygand, S. Whisnant, M. Witkowski, E. Wolin, A. Yegneswaran, J. Yun, Z. Zhou, J. Zhao

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

Models of baryon structure predict a small quadrupole deformation of the nucleon due to residual tensor forces between quarks or distortions from the pion cloud. Sensitivity to quark versus pion degrees of freedom occurs through the [Formula presented] dependence of the magnetic [Formula presented], electric [Formula presented], and scalar [Formula presented] multipoles in the [Formula presented] transition. We report new experimental values for the ratios [Formula presented] and [Formula presented] over the range [Formula presented], extracted from precision [Formula presented] data using a truncated multipole expansion. Results are best described by recent unitary models in which the pion cloud plays a dominant role.

Original languageEnglish (US)
Number of pages1
JournalPhysical Review Letters
Volume88
Issue number12
DOIs
StatePublished - Jan 1 2002

    Fingerprint

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Joo, K., Smith, L. C., Burkert, V. D., Minehart, R., Aznauryan, I. G., Elouadrhiri, L., Stepanyan, S., Adams, G. S., Amaryan, M. J., Anciant, E., Anghinolfi, M., Armstrong, D. S., Asavapibhop, B., Audit, G., Auger, T., Avakian, H., Barrow, S., Bagdasaryan, H., Battaglieri, M., ... Zhao, J. (2002). [Formula presented] Dependence of Quadrupole Strength in the [Formula presented] Transition. Physical Review Letters, 88(12). https://doi.org/10.1103/PhysRevLett.88.122001