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：
美国国家科学基金会; 以色列科学基金会; 加拿大自然科学与工程研究理事会;
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
收藏
页码：379 / 395
页数：17
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