Phys. Rev. Lett.
73,
25–29
(1994)
Precise Measurement of the Left-Right Cross Section Asymmetry in Z Boson Production by e+e- Collisions
K. Abe et al.
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K. Abe27, I. Abt13, W. W. Ash25,*, D. Aston25, N. Bacchetta20, K. G. Baird23, C. Baltay31, H. R. Band30, M. B. Barakat31, G. Baranko9, O. Bardon16, T. Barklow25, A. O. Bazarko10, R. Ben-David31, A. C. Benvenuti2, T. Bienz25, G. M. Bilei21, D. Bisello20, G. Blaylock7, J. R. Bogart25, T. Bolton10, G. R. Bower25, J. E. Brau19, M. Breidenbach25, W. M. Bugg26, D. Burke25, T. H. Burnett29, P. N. Burrows16, W. Busza16, A. Calcaterra12, D. O. Caldwell6, D. Calloway25, B. Camanzi11, M. Carpinelli22, R. Cassell25, R. Castaldi22,†, A. Castro20, M. Cavalli-Sforza7, E. Church29, H. O. Cohn26, J. A. Coller3, V. Cook29, R. Cotton4, R. F. Cowan16, D. G. Coyne7, A. D'Oliveira8, C. J. S. Damerell24, S. Dasu25, F. J. Decker25, R. De Sangro12, P. De Simone12, S. De Simone12, R. Dell'Orso22, Y. C. Du26, R. Dubois25, J. E. Duboscq6, B. I. Eisenstein13, R. Elia25, P. Emma25, C. Fan9, M. J. Fero16, R. Frey19, K. Furuno19, E. L. Garwin25, T. Gillman24, G. Gladding13, S. Gonzalez16, G. D. Hallewell25, E. L. Hart26, Y. Hasegawa27, S. Hedges4, S. S. Hertzbach17, M. D. Hildreth25, D. G. Hitlin5, J. Huber19, M. E. Huffer25, E. W. Hughes25, H. Hwang19, Y. Iwasaki27, J. M. Izen13, P. Jacques23, J. Jaros25, A. S. Johnson3, J. R. Johnson30, R. A. Johnson8, T. Junk25, R. Kajikawa18, M. Kalelkar23, I. Karliner13, H. Kawahara25, M. H. Kelsey5, H. W. Kendall16, M. E. King25, R. King25, R. R. Kofler17, N. M. Krishna9, R. S. Kroeger26, Y. Kwon25, J. F. Labs25, M. Langston19, A. Lath16, J. A. Lauber9, D. W. G. Leith25, T. Limberg25, X. Liu7, M. Loreti20, A. Lu6, H. L. Lynch25, J. Ma29, G. Mancinelli21, S. Manly31, G. Mantovani21, T. W. Markiewicz25, T. Maruyama25, H. Masuda25, E. Mazzucato11, J. F. McGowan13, A. K. McKemey4, B. T. Meadows8, R. Messner25, P. M. Mockett29, K. C. Moffeit25, B. Mours25, G. Müller25, D. Muller25, T. Nagamine25, U. Nauenberg9, H. Neal25, M. Nussbaum8, L. S. Osborne16, R. S. Panvini28, H. Park19, T. J. Pavel25, I. Peruzzi12,‡, L. Pescara20, M. Piccolo12, L. Piemontese11, E. Pieroni22, K. T. Pitts19, R. J. Plano23, R. Prepost30, C. Y. Prescott25, G. D. Punkar25, J. Quigley16, B. N. Ratcliff25, T. W. Reeves28, P. E. Rensing25, L. S. Rochester25, J. E. Rothberg29, P. C. Rowson10, J. J. Russell25, O. H. Saxton25, T. Schalk7, R. H. Schindler25, U. Schneekloth16, D. Schultz25, B. A. Schumm15, A. Seiden7, S. Sen31, M. H. Shaevitz10, J. T. Shank3, G. Shapiro15, D. J. Sherden25, C. Simopoulos25, S. R. Smith25, J. A. Snyder31, M. D. Sokoloff8, P. Stamer23, H. Steiner15, R. Steiner1, M. G. Strauss17, D. Su25, F. Suekane27, A. Sugiyama18, S. Suzuki18, M. Swartz25, A. Szumilo29, T. Takahashi25, F. E. Taylor16, E. Torrence16, J. D. Turk31, T. Usher25, J. Va'Vra25, C. Vannini22, E. Vella25, J. P. Venuti28, P. G. Verdini22, S. R. Wagner25, A. P. Waite25, S. J. Watts4, A. W. Weidemann26, J. S. Whitaker3, S. L. White26, F. J. Wickens24, D. A. Williams7, D. C. Williams16, S. H. Williams25, S. Willocq31, R. J. Wilson3, W. J. Wisniewski5, M. Woods25, G. B. Word23, J. Wyss20, R. K. Yamamoto16, J. M. Yamartino16, S. J. Yellin6, C. C. Young25, H. Yuta27, G. Zapalac30, R. W. Zdarko25, C. Zeitlin19, and J. Zhou19
1Adelphi University, Garden City, New York 11530
2Istituto Nazionale di Fisica Nucleare Sezione di Bologna, I-40126 Bologna, Italy
3Boston University, Boston, Massachusetts 02215
4Brunel University, Uxbridge, Middlesex UB8 3PH, United Kingdom
5California Institute of Technology, Pasadena, California 91125
6University of California at Santa Barbara, Santa Barbara, California 93106
7University of California at Santa Cruz, Santa Cruz, California 95064
8University of Cincinnati, Cincinnati, Ohio 45221
9University of Colorado, Boulder, Colorado 80309
10Columbia University, New York, New York 10027
11Istituto Nazionale di Fisica Nucleare Sezione di Ferrara and Università di Ferrara, I-44100 Ferrara, Italy
12Istituto Nazionale di Fisica Nucleare Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
13University of Illinois, Urbana, Illinois 61801
15Lawrence Berkeley Laboratory, University of California, Berkeley, California 94720
16Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
17University of Massachussetts, Amherst, Massachusetts 01003
18Nagoya University, Chikusa-ku, Nagoya 464, Japan
19University of Oregon, Eugene, Oregon 97403
20Istituto Nazionale di Fisica Nucleare Sezione di Padova and Università di Padova, I-35100 Padova, Italy
21Istituto Nazionale di Fisica Nucleare Sezione di Perugia and Università di Perugia, I-06100 Perugia, Italy
22Istituto Nazionale di Fisica Nucleare Sezione di Pisa and Università di Pisa, I-56100 Pisa, Italy
23Rutgers University, Piscataway, New Jersey 08855
24Rutherford Appleton Laboratory, Chilton Didcot, Oxon OX11 0QX, United Kingdom
25Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309
26University of Tennessee, Knoxville, Tennessee 37996
27Tohoku University, Sendai 980, Japan
28Vanderbilt University, Nashville, Tennessee 37235
29University of Washington, Seattle, Washington 98195
30University of Wisconsin, Madison, Wisconsin 53706
31Yale University, New Haven, Connecticut 06511
Received 31 March 1994; published in the issue dated 4 July 1994
We present a precise measurement of the left-right cross section asymmetry (ALR) for Z boson production by e+e- collisions. The measurement was performed at a center-of-mass energy of 91.26 GeV with the SLD detector at the SLAC Linear Collider (SLC). The luminosity-weighted average polarization of the SLC electron beam was (63.0 ± 1.1)%. Using a sample of 49 392 Z decays, we measure ALR to be 0.1628 ± 0.0071 (stat) ± 0.0028 (syst) which determines the effective weak mixing angle to be sin2θWeff=0.2292±0.0009(stat)±0.0004(syst).
© 1994 The American Physical Society
URL:
http://link.aps.org/doi/10.1103/PhysRevLett.73.25
DOI:
10.1103/PhysRevLett.73.25
PACS:
13.10.+q, 13.88.+e, 14.70.Hp
*Deceased. †Also at the Università di Genova, Genova, Italy. ‡Also at the Università di Perugia, Perugia, Italy.
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