Phys. Rev. D
63,
032005
(2001)
[14 pages]
Measurement of Ac with charmed mesons at the SLAC Large Detector
Kenji Abe et al. (The SLD Collaboration)
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Kenji Abe15, Koya Abe24, T. Abe21, I. Adam21, H. Akimoto21, D. Aston21, K. G. Baird11, C. Baltay30, H. R. Band29, T. L. Barklow21, J. M. Bauer12, G. Bellodi17, R. Berger21, G. Blaylock11, J. R. Bogart21, G. R. Bower21, J. E. Brau16, M. Breidenbach21, W. M. Bugg23, D. Burke21, T. H. Burnett28, P. N. Burrows17, A. Calcaterra8, R. Cassell21, A. Chou21, H. O. Cohn23, J. A. Coller4, M. R. Convery21, V. Cook28, R. F. Cowan13, G. Crawford21, C. J. S. Damerell19, M. Daoudi21, S. Dasu29, N. de Groot2, R. de Sangro8, D. N. Dong21, M. Doser21, R. Dubois21, I. Erofeeva14, V. Eschenburg12, E. Etzion29, S. Fahey5, D. Falciai8, J. P. Fernandez26, K. Flood11, R. Frey16, E. L. Hart23, K. Hasuko24, S. S. Hertzbach11, M. E. Huffer21, X. Huynh21, M. Iwasaki16, D. J. Jackson19, P. Jacques20, J. A. Jaros21, Z. Y. Jiang21, A. S. Johnson21, J. R. Johnson29, R. Kajikawa15, M. Kalelkar20, H. J. Kang20, R. R. Kofler11, R. S. Kroeger12, M. Langston16, D. W. G. Leith21, V. Lia13, C. Lin11, G. Mancinelli20, S. Manly20, G. Mantovani18, T. W. Markiewicz21, T. Maruyama21, A. K. McKemey3, R. Messner21, K. C. Moffeit21, T. B. Moore30, M. Morii21, D. Muller21, V. Murzin14, S. Narita24, U. Nauenberg5, H. Neal30, G. Nesom17, N. Oishi15, D. Onoprienko23, L. S. Osborne13, R. S. Panvini27, C. H. Park22, I. Peruzzi8, M. Piccolo8, L. Piemontese7, R. J. Plano20, R. Prepost29, C. Y. Prescott21, B. N. Ratcliff21, J. Reidy12, P. L. Reinertsen26, L. S. Rochester21, P. C. Rowson21, J. J. Russell21, O. H. Saxton21, T. Schalk26, B. A. Schumm26, J. Schwiening21, V. V. Serbo21, G. Shapiro10, N. B. Sinev16, J. A. Snyder30, H. Staengle6, A. Stahl21, P. Stamer20, H. Steiner10, D. Su21, F. Suekane24, A. Sugiyama15, S. Suzuki15, M. Swartz9, F. E. Taylor13, J. Thom21, E. Torrence13, T. Usher21, J. Va’vra21, R. Verdier13, D. L. Wagner5, A. P. Waite21, S. Walston16, A. W. Weidemann23, E. R. Weiss28, J. S. Whitaker4, S. H. Williams21, S. Willocq11, R. J. Wilson6, W. J. Wisniewski21, J. L. Wittlin11, M. Woods21, T. R. Wright29, R. K. Yamamoto13, J. Yashima24, S. J. Yellin25, C. C. Young21, and H. Yuta1 (The SLD Collaboration)
1Aomori University, Aomori, 030 Japan
2University of Bristol, Bristol, United Kingdom
3Brunel University, Uxbridge, Middlesex, UB8 3PH United Kingdom
4Boston University, Boston, Massachusetts 02215
5University of Colorado, Boulder, Colorado 80309
6Colorado State University, Ft. Collins, Colorado 80523
7INFN Sezione di Ferrara and Universita di Ferrara, I-44100 Ferrara, Italy
8INFN Lab. Nazionali di Frascati, I-00044 Frascati, Italy
9Johns Hopkins University, Baltimore, Maryland 21218-2686
10Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
11University of Massachusetts, Amherst, Massachusetts 01003
12University of Mississippi, University, Mississippi 38677
13Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
14Institute of Nuclear Physics, Moscow State University, 119899, Moscow, Russia
15Nagoya University, Chikusa-ku, Nagoya, 464 Japan
16University of Oregon, Eugene, Oregon 97403
17Oxford University, Oxford, OX1 3RH, United Kingdom
18INFN Sezione di Perugia and Universita di Perugia, I-06100 Perugia, Italy
19Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom
20Rutgers University, Piscataway, New Jersey 08855
21Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
22Soongsil University, Seoul, 156-743, Korea
23University of Tennessee, Knoxville, Tennessee 37996
24Tohoku University, Sendai 980, Japan
25University of California at Santa Barbara, Santa Barbara, California 93106
26University of California at Santa Cruz, Santa Cruz, California 95064
27Vanderbilt University, Nashville, Tennessee 37235
28University of Washington, Seattle, Washington 98105
29University of Wisconsin, Madison, Wisconsin 53706
30Yale University, New Haven, Connecticut 06511
Received 13 September 2000; published 9 January 2001
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.
© 2001 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevD.63.032005
DOI:
10.1103/PhysRevD.63.032005
PACS:
13.38.Dg, 11.30.Er, 12.15.Ji, 14.65.Dw
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