A STUDY OF CHARM MESON PRODUCTION IN SEMILEPTONIC B-DECAYS

被引：43

作者：

AKERS, R

ALEXANDER, G

ALLISON, J

AMETEWEE, K

ANDERSON, KJ

ARCELLI, S

ASAI, S

AXEN, D

AZUELOS, G

BALL, AH

BARBERIO, E

BARLOW, RJ

BARTOLDUS, R

BATLEY, JF

BEAUDOIN, G

BECK, A

BECK, GA

BEESTON, C

BEHNKE, T

BELL, KW

BELLA, G

BENTVELSEN, S

BERLICH, P

BETHKE, S

BIEBEL, O

BLOODWORTH, IJ

BOCK, P

BOSCH, HM

BOUTEMEUR, M

BRAIBANT, S

BRIGHTTHOMAS, P

BROWN, RM

BUIJS, A

BURCKHART, HJ

BURGIN, R

BURGARD, C

CAPDEVIELLE, N

CAPILUPPI, P

CARNEGIE, RK

CARTER, AA

CARTER, JR

CHANG, CY

CHARLESWORTH, C

CHARLTON, DG

CHU, SL

CLARKE, PEL

CLAYTON, JC

CLOWES, SG

COHEN, I

CONBOY, JE

机构：

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

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

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

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

[5] UNIV CALIF RIVERSIDE,DEPT PHYS,RIVERSIDE,CA 92521

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

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

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

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

[10] UNIV CHICAGO,ENRICO FERMI INST,CHICAGO,IL 60637

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

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

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

[14] INDIANA UNIV,DEPT PHYS,BLOOMINGTON,IN 47405

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

[16] RHEIN WESTFAL TH AACHEN,INST PHYS 3,D-52056 AACHEN,GERMANY

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

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

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

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

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

[22] CTR ETUD SACLAY,SPP,DAPNIA,CEA,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 PARTICLE 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,DEPT PARTICLE PHYS,IL-76100 REHOVOT,ISRAEL

[30] UNIV HAMBURG,DESY,INST EXPTL PHYS 2,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

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1995年 / 67卷 / 01期

关键词：

D O I：

10.1007/BF01564821

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：

The results of a study of charm meson production in semileptonic B hadron decays are presented. Based on a sample of 1.72 million hadronic Z(0) decays the following product branching ratios (averaged over electrons and muons) are obtained: B(b --> D+lX). B(D+ --> K- pi(+) pi(+)) = (1.82 + 0.20 +/- 0.12) x 10-3, B(b --> D(0)lX). B(D-0 --> K- pi(+)) = (2.52 +/- 0.14 +/- 0.17) x 10-3, B(b --> D*(+)lX). B(D*(+) --> D-0 pi(+)). B(D-0 --> K- pi(+)) = (7.53 +/- 0.47 +/- 0.56) x 10(-4), where the first error is statistical and the second systematic. The results of a search for the narrow P-wave charmed mesons, (D-J), in semileptonic B decays are also reported. Using the decay channels D-J(0) --> D+ pi(-), D-J(0) --> D*(+) pi(-) and D-J(+) --> D-0 pi(+) we observe a total signal of 44 +/- 8(-7)(+3) D-J(0) and 48 +/- 10(-6)(+3) D-J(+) events. This is the first evidence for semileptonic B decays to charged P-wave charm stales. The observed signals also provide evidence for the production of both pseudovector and tenser P-wave charmed mesons in semileptonic B decay. Together these modes are estimated to make up 34 +/- 7% of charmed semileptonic B-0 and B+ decays.

引用

页码：57 / 68

页数：12

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