A measurement of the charm and bottom forward-backward asymmetries using D mesons at LEP

被引：20

作者：

Alexander, G

Allison, J

Altekamp, N

Ametewee, K

Anderson, KJ

Anderson, S

Arcelli, S

Asai, S

Axen, D

Azuelos, G

Ball, AH

Barberio, E

Barlow, RJ

Bartoldus, R

Batley, JR

Bechtluft, J

Beeston, C

Behnke, T

Bell, AN

Bell, KW

Bella, G

Bentvelsen, S

Berlich, P

Bethke, S

Biebel, O

Blobel, V

Bloodworth, IJ

Bloomer, JE

Bobinski, M

Bock, P

Bosch, HM

Boutemeur, M

Bouwens, BT

Braibant, S

Brown, RM

Burckhart, HJ

Burgard, C

Burgin, R

Capiluppi, P

Carnegie, RK

Carter, AA

Carter, JR

Chang, CY

Charlesworth, C

Charlton, DG

Chrisman, D

Chu, SL

Clarke, PEL

Cohen, I

Conboy, JE

机构：

[1] UNIV BOLOGNA, DIPARTMENTO FIS, I-40126 BOLOGNA, ITALY

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

[3] UNIV BONN, INST PHYS, D-53115 BONN, GERMANY

[4] UNIV CALIF RIVERSIDE, DEPT PHYS, RIVERSIDE, CA 92521 USA

[5] CAVENDISH LAB, CAMBRIDGE CB3 0HE, ENGLAND

[6] CARLETON UNIV, DEPT PHYS, OTTAWA CARLETON INST PHYS, OTTAWA, ON K1S 5B6, CANADA

[7] CARLETON UNIV, CTR RES PARTICLE PHYS, OTTAWA, ON K1S 5B6, CANADA

[8] CERN, EUROPEAN ORG PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND

[9] UNIV CHICAGO, ENRICO FERMI INST, CHICAGO, IL 60637 USA

[10] UNIV CHICAGO, DEPT PHYS, CHICAGO, IL 60637 USA

[11] UNIV FREIBURG, FAK PHYS, D-79104 FREIBURG, GERMANY

[12] UNIV HEIDELBERG, INST PHYS, D-69120 HEIDELBERG, GERMANY

[13] INDIANA UNIV, DEPT PHYS, BLOOMINGTON, IN 47405 USA

[14] UNIV LONDON QUEEN MARY & WESTFIELD COLL, LONDON E1 4NS, ENGLAND

[15] RHEIN WESTFAL TH AACHEN, INST PHYS 2, D-52056 AACHEN, GERMANY

[16] UCL, LONDON WC1E 6BT, ENGLAND

[17] UNIV MANCHESTER, DEPT PHYS, SCHUSTER LAB, MANCHESTER M13 9PL, LANCS, ENGLAND

[18] UNIV MARYLAND, DEPT PHYS, COLLEGE PK, MD 20742 USA

[19] UNIV MONTREAL, PHYS NUCL LAB, MONTREAL, PQ H3C 3J7, CANADA

[20] UNIV OREGON, DEPT PHYS, EUGENE, OR 97403 USA

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

[22] CTR ETUD SACLAY, CEA, DAPNIA, SPP, F-91191 GIF SUR YVETTE, FRANCE

[23] TECHNION ISRAEL INST TECHNOL, DEPT PHYS, IL-32000 HAIFA, ISRAEL

[24] TEL AVIV UNIV, DEPT PHYS & ASTRON, IL-69978 TEL AVIV, ISRAEL

[25] UNIV TOKYO, INT CTR ELEMENTARY PARTICE PHYS, TOKYO 113, JAPAN

[26] UNIV TOKYO, DEPT PHYS, TOKYO 113, JAPAN

[27] KOBE UNIV, KOBE 657, JAPAN

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

[29] WEIZMANN INST SCI, PARTICLE PHYS DEPT, IL-76100 REHOVOT, ISRAEL

[30] UNIV HAMBURG, INST EXPT PHYS 2, DESY, D-22607 HAMBURG, GERMANY

[31] UNIV VICTORIA, DEPT PHYS, VICTORIA, BC V8W 3P6, CANADA

[32] UNIV BRITISH COLUMBIA, DEPT PHYS, VANCOUVER, BC V6T 1Z1, CANADA

[33] UNIV ALBERTA, DEPT PHYS, EDMONTON, AB T6G 2J1, CANADA

[34] DUKE UNIV, DEPT PHYS, DURHAM, NC 27708 USA

[35] RES INST PARTICLE & NUCLEAR PHYS, H-1525 BUDAPEST, HUNGARY

[36] INST NUCL RES, H-4001 DEBRECEN, HUNGARY

[37] UNIV MUNICH, SEKT PHYS, D-85748 GARCHING, GERMANY

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

[39] LAJOS KOSSUTH UNIV, DEPT EXPT PHYS, DEBRECEN, HUNGARY

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1997年 / 73卷 / 03期

基金：

以色列科学基金会; 加拿大自然科学与工程研究理事会; 美国国家科学基金会;

关键词：

D O I：

10.1007/s002880050328

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A measurement of the charm and bottom forward-backward asymmetry in e(+)e(-) annihilations is presented at energies on and around the peak of the Z(0) resonance. Decays of the Z(0) into charm and bottom quarks are tag,oed using D mesons identified in about 4 million hadronic decays of the Z(0) boson recorded with the OPAL detector at LEP between 1990 and 1995. Approximately 33000 D mesons are tagged in seven different decay modes. From these the charm and bottom asymmetries are measured in three energy ranges around the Z(0) peak: A(FB)(c) =0.039 +/- 0.051 +/- 0.009 A(FB)(c) =0.063 +/- 0.012 +/- 0.006 A(FB)(c) =0.158 +/- 0.041 +/- 0.011 A(FB)(b) =-0.086 +/- 0.108 +/- 0.029 A(FB)(b) =0.094 +/- 0.027 +/- 0.022 A(FB)(b) =-0.021 +/- 0.090 +/- 0.026 [E(cm)] =89.45 GeV [E(cm)] =91.22 GeV [E(cm)] =93.00 GeV The results are in agreement with the predictions of the standard model and other measurements at LEP.

引用

页码：379 / 395

页数：17

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