MEASUREMENT OF THE TIME-DEPENDENCE OF BD(0)-][-(BD(0))OVER-BAR MISING USING A JET CHARGE TECHNIQUE

被引：60

作者：

AKERS, R

ALEXANDER, G

ALLISON, J

ANDERSON, KJ

ARCELLI, S

ASAI, S

ASTBURY, A

AXEN, D

AZUELOS, G

BALL, AH

BARLOW, RJ

BARNETT, S

BARTOLDUS, R

BATLEY, JR

BEAUDOIN, G

BECK, A

BECK, GA

BECKER, J

BEESTON, C

BEHNKE, T

BELL, KW

BELLA, G

BENTKOWSKI, P

BERLICH, P

BETHKE, S

BIEBEL, O

BLOODWORTH, IJ

BOCK, P

BODEN, B

BOSCH, HM

BOUTEMEUR, M

BRIGHTHOMAS, P

BROWN, RM

BUIJS, A

BURCKHART, HJ

BURGARD, C

CAPILUPPI, P

CARNEGIE, RK

CARTER, AA

CARTER, JR

CHANG, CY

CHARLESWORTH, C

CHARLTON, DG

CHU, SL

CLARKE, PEL

CLAYTON, JC

COHEN, I

CONBOY, JE

COOPER, M

COUPLAND, M

机构：

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

[2] UNIV BIRMINGHAM, SCH PHYS & SPACE RES, BIRMINGHAM B15 2TT, W MIDLANDS, ENGLAND

[3] UNIV BOLOGNA, DIPARTIMENTO FIS, I-40126 BOLOGNA, ITALY

[4] IST NAZL FIS NUCL, BOLOGNA, ITALY

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

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

[7] UNIV CAMBRIDGE, CAVENDISH LAB, CAMBRIDGE CB3 0HE, ENGLAND

[8] CARLETON UNIV, DEPT PHYS, OTTAWA K1S 5B6, ONTARIO, CANADA

[9] CARLETON UNIV, CTR RES PARTICLE PHYS, OTTAWA K1S 5B6, ONTARIO, CANADA

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

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

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

[13] ALBERT LUDWIGS UNIV, FAK PHYS, D-79104 FREIBURG, GERMANY

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

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

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

[17] UNIV LONDON BIRKBECK COLL, LONDON WC1E 7HX, ENGLAND

[18] UNIV LONDON UNIV COLL, LONDON WC1E 6BT, ENGLAND

[19] UNIV MARYLAND, DEPT PHYS, COLL PK, MD 20742 USA

[20] UNIV MONTREAL, PHYS NUCL LAB, MONTREAL H3C 3J7, QUEBEC, CANADA

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

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

[23] DAPNIA, SPP, F-91191 GIF SUR YVETTE, FRANCE

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

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

[26] UNIV TOKYO, INT CTR ELEMENTARY PARTICLE PHYS, TOKYO 113, JAPAN

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

[28] KOBE UNIV, KOBE 657, JAPAN

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

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

[31] UNIV HAMBURG, DESY, INST EXPTL PHYS, D-22607 HAMBURG, GERMANY

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

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

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

[35] UNIV AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY

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

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

来源：

PHYSICS LETTERS B | 1994年 / 327卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(94)90747-1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The observation and measurement of the time-dependence of B(d)0<-->B(d)0BAR mixing are described. The B(d)0 meson is reconstructed in final states that contain a D*- and an l+, where the b flavour of the B(d)0 at decay time is tagged by the electric charge of the lepton. A new and efficient method, using a jet charge technique, is developed for identifying the b flavour of the produced B(d)0. From a sample of 556 D*+/-l-/+ candidates reconstructed in the OPAL data collected during 1990-1993, the B(d)0<-->B(d)0BAR oscillation frequency is measured to be DELTAm(d) = 0.508 +/- 0.075(stat) +/-0.025(syst) ps-1 giving an oscillation parameter of x(d) = 0.73 +/- 0.11 (stat) +/-0.08 (syst), where 0.076 of the systematic error on x(d) arises from the uncertainty on the B(d)0 lifetime.

引用

页码：411 / 424

页数：14

共 42 条

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