First measurement of the left-right charge asymmetry in hadronic Z boson decays and a new determination of sin(2)O(w)(eff)

被引：15

作者：

Abe, K

Abt, I

Akagi, T

Allen, NJ

Ash, WW

Aston, D

Baird, KG

Baltay, C

Band, HR

Barakat, MB

Baranko, G

Bardon, O

Barklow, TL

Bashindzhagyan, GL

Bazarko, AO

BenDavid, R

Benvenuti, AC

Bilei, GM

Bisello, D

Blaylock, G

Bogart, JR

Bolen, B

Bolton, T

Bower, GR

Brau, JE

Breidenbach, M

Bugg, WM

Burke, D

Burnett, TH

Burrows, PN

Busza, W

Calcaterra, A

Caldwell, DO

Calloway, D

Camanzi, B

Carpinelli, M

Cassell, R

Castaldi, R

Castro, A

CavalliSforza, M

Chou, A

Church, E

Cohn, HO

Coller, JA

Cook, V

Cotton, R

Cowan, RF

Coyne, DG

Crawford, G

机构：

[1] ADELPHI UNIV, GARDEN CITY, NY 11530 USA

[2] IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY

[3] BOSTON UNIV, BOSTON, MA 02215 USA

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

[5] UNIV CALIF SANTA BARBARA, SANTA BARBARA, CA 93106 USA

[6] UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA

[7] UNIV CINCINNATI, CINCINNATI, OH 45221 USA

[8] COLORADO STATE UNIV, FT COLLINS, CO 80523 USA

[9] UNIV COLORADO, BOULDER, CO 80309 USA

[10] COLUMBIA UNIV, NEW YORK, NY USA

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

[12] IST NAZL FIS NUCL, I-44100 FERRARA, ITALY

[13] IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY

[14] UNIV ILLINOIS, URBANA, IL 61801 USA

[15] UNIV CALIF BERKELEY, LAWRENCE BERKELEY LAB, BERKELEY, CA 94720 USA

[16] MIT, CAMBRIDGE, MA 02139 USA

[17] UNIV MASSACHUSETTS, AMHERST, MA 01003 USA

[18] MOSCOW MV LOMONOSOV STATE UNIV, INST NUCL PHYS, MOSCOW 119899, RUSSIA

[19] UNIV OREGON, EUGENE, OR 97403 USA

[20] IST NAZL FIS NUCL, I-35100 PADUA, ITALY

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

[22] IST NAZL FIS NUCL, I-56100 PISA, ITALY

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

[24] RUTGERS STATE UNIV, PISCATAWAY, NJ 08855 USA

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

[26] SOGANG UNIV, SEOUL, SOUTH KOREA

[27] STANFORD UNIV, STANFORD LINEAR ACCELERATOR CTR, STANFORD, CA 94309 USA

[28] UNIV TENNESSEE, KNOXVILLE, TN 37996 USA

[29] TOHOKU UNIV, SENDAI, MIYAGI 980, JAPAN

[30] VANDERBILT UNIV, NASHVILLE, TN 37235 USA

[31] UNIV WASHINGTON, SEATTLE, WA 98195 USA

[32] UNIV WISCONSIN, MADISON, WI 53706 USA

[33] YALE UNIV, NEW HAVEN, CT 06511 USA

来源：

PHYSICAL REVIEW LETTERS | 1997年 / 78卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.78.17

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 charge asymmetry A(Q)(obs) in hadronic Z boson decays. This was performed at E(c.m.) = 91.27 GeV with the SLD at the SLAG Linear Collider with a polarized electron beam. Using 89 838 events we obtain A(Q)(obs) = 0.225 +/- 0.056 +/- 0.019, which leads to a measurement of the electron left-right asymmetry parameter. A(e) = 0.162 +/- 0.041 +/- 0.014, and sin(2) theta(W)(eff) = 0.2297 +/- 0.0052 +/- 0.0018, Also, the Ag measurement combined with the left-right cross section asymmetry determines A(e) independent of the value of the electron-beam polarization.

引用

页码：17 / 21

页数：5

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