Measurement of Ac with charmed mesons at the SLAC large detector

Kenji Abe, Koya Abe, T. Abe, I. Adam, H. Akimoto, D. Aston, K. G. Baird, C. Baltay, H. R. Band, T. L. Barklow, J. M. Bauer, G. Bellodi, R. Berger, G. Blaylock, J. R. Bogart, G. R. Bower, J. E. Brau, M. Breidenbach, W. M. Bugg, D. BurkeT. H. Burnett, P. N. Burrows, A. Calcaterra, R. Cassell, A. Chou, H. O. Cohn, J. A. Coller, M. R. Convery, V. Cook, R. F. Cowan, G. Crawford, C. J.S. Damerell, M. Daoudi, S. Dasu, N. De Groot, R. De Sangro, D. N. Dong, M. Doser, R. Dubois, I. Erofeeva, V. Eschenburg, E. Etzion, S. Fahey, D. Falciai, J. P. Fernandez, K. Flood, R. Frey, E. L. Hart, K. Hasuko, S. S. Hertzbach, M. E. Huffer, X. Huynh, M. Iwasaki, D. J. Jackson, P. Jacques, J. A. Jaros, Z. Y. Jiang, A. S. Johnson, J. R. Johnson, R. Kajikawa, M. Kalelkar, H. J. Kang, R. R. Kofler, R. S. Kroeger, M. Langston, D. W.G. Leith, V. Lia, C. Lin, G. Mancinelli, S. Manly, G. Mantovani, T. W. Markiewicz, T. Maruyama, A. K. McKemey, R. Messner, K. C. Moffeit, T. B. Moore, M. Morii, D. Muller, V. Murzin, S. Narita, U. Nauenberg, H. Neal, G. Nesom, N. Oishi, D. Onoprienko, L. S. Osborne, R. S. Panvini, C. H. Park, I. Peruzzi, M. Piccolo, L. Piemontese, R. J. Plano, R. Prepost, C. Y. Prescott, B. N. Ratcliff, J. Reidy, P. L. Reinertsen, L. S. Rochester, P. C. Rowson, J. J. Russell, O. H. Saxton, T. Schalk, B. A. Schumm, J. Schwiening, V. V. Serbo, G. Shapiro, N. B. Sinev, J. A. Snyder, H. Staengle, A. Stahl, P. Stamer, H. Steiner, D. Su, F. Suekane, A. Sugiyama, S. Suzuki, M. Swartz, F. E. Taylor, J. Thom, E. Torrence, T. Usher, J. Va'vra, R. Verdier, D. L. Wagner, A. P. Waite, S. Walston, A. W. Weidemann, E. R. Weiss, J. S. Whitaker, S. H. Williams, S. Willocq, R. J. Wilson, W. J. Wisniewski, J. L. Wittlin, M. Woods, T. R. Wright, R. K. Yamamoto, J. Yashima, S. J. Yellin, C. C. Young, H. Yuta

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Abstract

We present a direct measurement of the parity-violation parameter Ac in the coupling of the Z0 to c quarks with the SLD detector. The measurement is based on a sample of 530 k hadronic Z0 decays, produced with a mean electron-beam polarization of |Pe| = 73%. The tagging of c-quark events is performed using two methods: the exclusive reconstruction of D*+, D+, and D0 mesons, and the soft pions (πs) produced in the decay of D*+→D0πs+. The large background from D mesons produced in B hadron decays is separated efficiently from the signal using precision vertex information. The combination of these two methods yields Ac= 0.688 ± 0.041.

Original languageEnglish
Article number032005
Pages (from-to)320051-3200514
Number of pages2880464
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume63
Issue number3
Publication statusPublished - 2001

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Abe, K., Abe, K., Abe, T., Adam, I., Akimoto, H., Aston, D., Baird, K. G., Baltay, C., Band, H. R., Barklow, T. L., Bauer, J. M., Bellodi, G., Berger, R., Blaylock, G., Bogart, J. R., Bower, G. R., Brau, J. E., Breidenbach, M., Bugg, W. M., ... Yuta, H. (2001). Measurement of Ac with charmed mesons at the SLAC large detector. Physical Review D - Particles, Fields, Gravitation and Cosmology, 63(3), 320051-3200514. [032005].