D production by e+e- annihilation near 34.4 GeV cm energy

M. Althoff, W. Braunschweig, K. Gather, F. J. Kirschfink, K. Lübelsmeyer, H. U. Martyn, G. Peise, J. Rimkus, H. G. Sander, D. Schmitz, H. Siebke, D. Trines, W. Wallraff, H. M. Fischer, H. Hartmann, E. Hilger, W. Hillen, G. Knop, L. Köpke, H. KolanoskiH. Kück, R. Wedemeyer, N. Wermes, M. Wollstadt, H. Burkhardt, H. Hultschig, P. Joos, W. Koch, U. Kötz, H. Kowalski, A. Ladage, B. Löhr, D. Lüke, P. Mättig, K. H. Mess, D. Notz, J. Pyrlik, D. Quarrie, R. Riethmüller, A. M. Rushton, W. Schütte, G. Wolf, G. Yekutieli, R. Fohrmann, H. L. Krasemann, P. Leu, E. Lohrmann, D. Pandoulas, G. Poelz, B. H. Wiik, I. Al-Agil, R. Beuselinck, D. M. Binnie, A. J. Campbell, P. J. Dornan, B. Foster, D. A. Garbutt, T. D. Jones, W. G. Jones, J. McCardle, J. K. Sedgbeer, K. W. Bell, M. G. Bowler, I. C. Brock, R. J. Cashmore, P. E.L. Clarke, R. Devenish, P. Grossmann, S. L. Lloyd, G. L. Salmon, J. Thomas, T. R. Wyatt, C. Youngman, J. C. Hart, J. Harvey, J. Proudfoot, D. H. Saxon, P. L. Woodworth, D. Heyland, M. Holder, M. Dittmar, E. Duchovni, Y. Eisenberg, D. Hochman, U. Karshon, G. Mikenberg, R. Mir, D. Revel, E. Ronat, A. Shapira, T. Barklow, M. Cherney, J. M. Izen, G. Rudolph, D. Strom, H. Venkataramania, E. Wicklund, Lan Wu Sau Lan Wu, G. Zobernig

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Abstract

D production via e+e-→DX has been measured at an average CM energy of 34.4 GeV. The D energy spectrum is hard, with a maximum near χ = 0.6. The size of the D* cross section, RD* = σ(e+e- → D*X) σμμ = 2.50 ± 0.64 ± 0.88 (assuming RD*0 = RD*+ ) indicates that a large fraction of charm quark production yields D* mesons. The D angular distribution exhibits a forward-backward asymmetry, A = -0.28 ± 0.13. This is consistent with that expected in the standard theory for weak neutral currents and leads to |gA c| = 0.89 ± 0.44 for the axial vector coupling of the charm quark.

Original languageEnglish (US)
Pages (from-to)493-498
Number of pages6
JournalPhysics Letters B
Volume126
Issue number6
DOIs
StatePublished - Jul 14 1983

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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    Althoff, M., Braunschweig, W., Gather, K., Kirschfink, F. J., Lübelsmeyer, K., Martyn, H. U., Peise, G., Rimkus, J., Sander, H. G., Schmitz, D., Siebke, H., Trines, D., Wallraff, W., Fischer, H. M., Hartmann, H., Hilger, E., Hillen, W., Knop, G., Köpke, L., ... Zobernig, G. (1983). D production by e+e- annihilation near 34.4 GeV cm energy. Physics Letters B, 126(6), 493-498. https://doi.org/10.1016/0370-2693(83)90372-6