1ST MEASUREMENT OF THE LEFT-RIGHT CROSS-SECTION ASYMMETRY IN Z-BOSON PRODUCTION BY E+E- COLLISIONS

被引：60

作者：

ABE, K

ABT, I

ACTON, PD

ADOLPHSEN, CE

AGNEW, G

ALBER, C

ALZOFON, DF

ANTILOGUS, P

ARROYO, C

ASH, WW

ASHFORD, V

ASTBURY, A

ASTON, D

AU, Y

AXEN, DA

BACCHETTA, N

BAIRD, KG

BAKER, W

BALTAY, C

BAND, HR

BARANKO, G

BARDON, O

BARRERA, F

BATTISTON, R

BAZARKO, AO

BEAN, A

BEER, G

BELCINSKI, RJ

BELL, RA

BENDAVID, R

BENVENUTI, AC

BERGER, R

BERRIDGE, SC

BETHKE, S

BIASINI, M

BIENZ, T

BILEI, GM

BIRD, F

BISELLO, D

BLAYLOCK, G

BLUMBERG, R

BOGART, JR

BOLTON, T

BOUGEROLLE, S

BOWER, GR

BOYCE, RF

BRAU, JE

BREIDENBACH, M

BROWDER, TE

BUGG, WM

机构：

[1] ADELPHI UNIV,GARDEN CITY,NY 11530

[2] BOSTON UNIV,BOSTON,MA 02215

[3] UNIV BRITISH COLUMBIA,VANCOUVER V6T 2A6,BC,CANADA

[4] BRUNEL UNIV,UXBRIDGE UB8 3PH,MIDDX,ENGLAND

[5] CALTECH,PASADENA,CA 91125

[6] UNIV CALIF SANTA BARBARA,SANTA BARBARA,CA 93106

[7] UNIV CALIF SANTA CRUZ,SANTA CRUZ,CA 95064

[8] UNIV CINCINNATI,CINCINNATI,OH 45221

[9] UNIV COLORADO,BOULDER,CO 80309

[10] COLUMBIA UNIV,NEW YORK,NY 10027

[11] UNIV FERRARA,I-44100 FERRARA,ITALY

[12] INDIANA UNIV,BLOOMINGTON,IN 47405

[13] UNIV ILLINOIS,URBANA,IL 61801

[14] LAWRENCE BERKELEY LAB,BERKELEY,CA 94720

[15] MIT,CAMBRIDGE,MA 02139

[16] UNIV MASSACHUSETTS,AMHERST,MA 01003

[17] NAGOYA UNIV,CHIKUSA KU,NAGOYA,AICHI 464,JAPAN

[18] UNIV OREGON,EUGENE,OR 97403

[19] UNIV PADUA,I-35100 PADUA,ITALY

[20] UNIV PERUGIA,I-06100 PERUGIA,ITALY

[21] UNIV PISA,I-56100 PISA,ITALY

[22] RUTHERFORD APPLETON LAB,DIDCOT OX11 0QX,OXON,ENGLAND

[23] STANFORD UNIV,STANFORD LINEAR ACCELERATOR CTR,STANFORD,CA 94305

[24] UNIV TENNESSEE,KNOXVILLE,TN 37996

[25] TRIUMF,VANCOUVER V6T 2A3,BC,CANADA

[26] VANDERBILT UNIV,NASHVILLE,TN 37235

[27] UNIV WASHINGTON,SEATTLE,WA 98195

[28] UNIV WISCONSIN,MADISON,WI 53706

[29] INFN,SEZ BOLOGNA,I-40126 BOLOGNA,ITALY

[30] INFN,SEZ FERRARA,I-44100 FERRARA,ITALY

[31] INFN,LAB NAZL FRASCATI,I-00044 FRASCATI,ITALY

[32] KEK,NATL LAB,TSUKUBA,IBARAKI 305,JAPAN

[33] INFN,SEZ PADOVA,I-35100 PADUA,ITALY

[34] INFN,SEZ PERUGIA,I-06100 PERUGIA,ITALY

[35] INFN,SEZ PISA,I-56100 PISA,ITALY

[36] RUTGERS STATE UNIV,PISCATAWAY,NJ 08855

[37] UNIV VICTORIA,TRIUMF,VICTORIA V8W 3P6,BC,CANADA

[38] YALE UNIV,NEW HAVEN,CT 06511

[39] UNIV GENOA,I-16126 GENOA,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 70卷 / 17期

关键词：

D O I：

10.1103/PhysRevLett.70.2515

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present the first measurement of the left-right cross section asymmetry (A(LR)) for Z boson production by e+e- collisions. The measurement was performed at a center-of-mass energy of 91.55 GeV with the SLD detector at the SLAC Linear Collider which utilized a longitudinally polarized electron beam. The average beam polarization was (22.4 +/- 0.6)%. Using a sample of 10224 Z decays, we measure A(LR) to be 0.100 +/- 0.044(stat) +/- 0.004(syst), which determines the effective weak mixing angle to be sin2theta(W)eff=0.2378 +/- 0.0056(stat) +/- 0.0005(syst).

引用

页码：2515 / 2520

页数：6

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