Phys. Rev. Lett.
83,
3384–3389
(1999)
Direct Measurement of Ab and Ac at the Z0 Pole Using a Lepton Tag
Kenji Abe et al. (SLD Collaboration)
Show All Authors/Affiliations
Hide All Authors/Affiliations
Kenji Abe20, Koya Abe32, T. Abe28, I. Adam28, T. Akagi28, N. J. Allen4, A. Arodzero21, W. W. Ash28,*, D. Aston28, K. G. Baird16, C. Baltay38, H. R. Band37, M. B. Barakat15, O. Bardon18, T. L. Barklow28, G. L. Bashindzhagyan19, J. M. Bauer17, G. Bellodi22, R. Ben-David38, A. C. Benvenuti3, G. M. Bilei24, D. Bisello23, G. Blaylock16, J. R. Bogart28, B. Bolen17, G. R. Bower28, J. E. Brau21, M. Breidenbach28, W. M. Bugg31, D. Burke28, T. H. Burnett36, P. N. Burrows22, R. M. Byrne18, A. Calcaterra11, D. Calloway28, B. Camanzi10, M. Carpinelli25, R. Cassell28, R. Castaldi25, A. Castro23, M. Cavalli-Sforza34, A. Chou28, E. Church36, H. O. Cohn31, J. A. Coller5, M. R. Convery28, V. Cook36, R. Cotton4, R. F. Cowan18, D. G. Coyne34, G. Crawford28, C. J. S. Damerell26, M. N. Danielson7, M. Daoudi28, N. de Groot28, R. Dell'Orso24, P. J. Dervan4, R. de Sangro11, M. Dima9, A. D'Oliveira6, D. N. Dong18, M. Doser28, R. Dubois28, B. I. Eisenstein12, V. Eschenburg17, E. Etzion37, S. Fahey7, D. Falciai11, C. Fan7, J. P. Fernandez34, M. J. Fero18, K. Flood16, R. Frey21, T. Gillman26, G. Gladding12, S. Gonzalez18, E. R. Goodman7, E. L. Hart31, J. L. Harton9, A. Hasan4, K. Hasuko32, S. J. Hedges5, S. S. Hertzbach16, M. D. Hildreth28, J. Huber21, M. E. Huffer28, E. W. Hughes28, X. Huynh28, H. Hwang21, M. Iwasaki21, D. J. Jackson26, P. Jacques27, J. A. Jaros28, Z. Y. Jiang28, A. S. Johnson28, J. R. Johnson37, R. A. Johnson6, T. Junk28, R. Kajikawa20, M. Kalelkar27, Y. Kamyshkov31, H. J. Kang27, I. Karliner12, H. Kawahara28, Y. D. Kim29, R. King28, M. E. King28, R. R. Kofler16, N. M. Krishna7, R. S. Kroeger17, M. Langston21, A. Lath18, D. W. G. Leith28, V. Lia18, C.-J. S. Lin16, X. Liu34, M. X. Liu38, M. Loreti23, A. Lu33, H. L. Lynch28, J. Ma36, M. Mahjouri18, G. Mancinelli27, S. Manly38, G. Mantovani24, T. W. Markiewicz28, T. Maruyama28, H. Masuda28, E. Mazzucato10, A. K. McKemey4, B. T. Meadows6, G. Menegatti10, R. Messner28, P. M. Mockett36, K. C. Moffeit28, T. B. Moore38, M. Morii28, D. Muller28, V. Murzin19, T. Nagamine32, S. Narita32, U. Nauenberg7, H. Neal28, M. Nussbaum6,†, N. Oishi20, D. Onoprienko31, L. S. Osborne18, R. S. Panvini35, H. Park21, C. H. Park30, T. J. Pavel28, I. Peruzzi11, M. Piccolo11, L. Piemontese10, E. Pieroni25, K. T. Pitts21, R. J. Plano27, R. Prepost37, C. Y. Prescott28, G. D. Punkar28, J. Quigley18, B. N. Ratcliff28, T. W. Reeves35, J. Reidy17, P. L. Reinertsen34, P. E. Rensing28, L. S. Rochester28, P. C. Rowson8, J. J. Russell28, O. H. Saxton28, T. Schalk34, R. H. Schindler28, B. A. Schumm34, J. Schwiening28, S. Sen38, V. V. Serbo28, M. H. Shaevitz8, J. T. Shank5, G. Shapiro14, D. J. Sherden28, K. D. Shmakov31, C. Simopoulos28, N. B. Sinev21, S. R. Smith28, M. B. Smy9, J. A. Snyder38, H. Staengle9, A. Stahl28, P. Stamer27, R. Steiner1, H. Steiner14, M. G. Strauss16, D. Su28, F. Suekane32, A. Sugiyama20, S. Suzuki20, M. Swartz13, A. Szumilo36, T. Takahashi28, F. E. Taylor18, J. Thom28, E. Torrence18, N. K. Toumbas28, T. Usher28, C. Vannini25, J. Va'vra28, E. Vella28, J. P. Venuti35, R. Verdier18, P. G. Verdini25, S. R. Wagner28, D. L. Wagner7, A. P. Waite28, S. Walston21, J. Wang28, C. Ward4, S. J. Watts4, A. W. Weidemann31, E. R. Weiss36, J. S. Whitaker5, S. L. White31, F. J. Wickens26, B. Williams7, D. C. Williams18, S. H. Williams28, S. Willocq28, R. J. Wilson9, W. J. Wisniewski28, J. L. Wittlin16, M. Woods28, G. B. Word35, T. R. Wright37, J. Wyss23, R. K. Yamamoto18, J. M. Yamartino18, X. Yang21, J. Yashima32, S. J. Yellin33, C. C. Young28, H. Yuta2, G. Zapalac37, R. W. Zdarko28, and J. Zhou21 (SLD Collaboration)
1Adelphi University, Garden City, New York 11530
2Aomori University, Aomori, 030 Japan
3INFN Sezione di Bologna, I-40126 Bologna, Italy
4Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom
5Boston University, Boston, Massachusetts 02215
6University of Cincinnati, Cincinnati, Ohio 45221
7University of Colorado, Boulder, Colorado 80309
8Columbia University, New York, New York 10533
9Colorado State University, Ft. Collins, Colorado 80523
10INFN Sezione di Ferrara and Universita di Ferrara, I-44100 Ferrara, Italy
11INFN Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
12University of Illinois, Urbana, Illinois 61801
13Johns Hopkins University, Baltimore, Maryland 21153
14Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
15Louisiana Technical University, Ruston, Louisiana 71272
16University of Massachusetts, Amherst, Massachusetts 01003
17University of Mississippi, University, Mississippi 38677
18Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
19Institute of Nuclear Physics, Moscow State University, 119899, Moscow, Russia
20Nagoya University, Chikusa-ku, Nagoya, 464 Japan
21University of Oregon, Eugene, Oregon 97403
22Oxford University, Oxford OX1 3RH, United Kingdom
23INFN Sezione di Padova and Universita di Padova, I-35100 Padova, Italy
24INFN Sezione di Perugia and Universita di Perugia, I-06100 Perugia, Italy
25INFN Sezione di Pisa and Universita di Pisa, I-56010 Pisa, Italy
26Rutherford Appleton Laboratory, Chilton, Didcot, Oxon OX11 0QX, United Kingdom
27Rutgers University, Piscataway, New Jersey 08855
28Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
29Sogang University, Seoul, Korea
30Soongsil University, Seoul, Korea 156–743
31University of Tennessee, Knoxville, Tennessee 37996
32Tohoku University, Sendai, 980 Japan
33University of California at Santa Barbara, Santa Barbara, California 93106
34University of California at Santa Cruz, Santa Cruz, California 95064
35Vanderbilt University, Nashville, Tennessee 37235
36University of Washington, Seattle, Washington 98105
37University of Wisconsin, Madison, Wisconsin 53706
38Yale University, New Haven, Connecticut 06511
Received 4 May 1999; published in the issue dated 25 October 1999
The parity violation parameters Ab and Ac of the Zbb̅ and Zcc̅ couplings have been measured directly, using the polar angle dependence of the Z0-pole polarized cross sections. Bottom and charmed hadrons were tagged via semileptonic decays. Both the muon and electron identification algorithms take advantage of new multivariate techniques, incorporating for the first time information from the SLD Čerenkov Ring Imaging Detector. Based on the 1993–1995 SLD sample of 150 000 Z0 decays produced with highly polarized electron beams, we measure Ab = 0.910±0.068(stat)±0.037(syst), Ac = 0.642±0.110(stat)±0.063(syst).
© 1999 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.3384
DOI:
10.1103/PhysRevLett.83.3384
PACS:
13.38.Dg, 11.30.Er, 12.15.Ji, 14.65.Fy
|
|
