MEASUREMENT OF THE MULTIPLICITY OF CHARM QUARK PAIRS FROM GLUONS IN HADRONIC Z(0) DECAYS

被引：41

作者：

AKERS, R

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

BEAUDOIN, G

BETHKE, S

BECK, A

BECK, GA

BEESTON, C

BEHNKE, T

BELL, KW

BELLA, G

BENTVELSEN, S

BERLICH, P

BECHTLUFT, J

BIEBEL, O

BLOODWORTH, IJ

BOCK, P

BOSCH, HM

BOUTEMEUR, M

BRAIBANT, S

BRIGHTTHOMAS, P

BROWN, RM

BUIJS, A

BURCKHART, HJ

BURGIN, R

BURGARD, C

CAPILUPPI, P

CARNEGIE, RK

CARTER, AA

CARTER, JR

CHANG, CY

CHARLESWORTH, C

CHARLTON, DG

CHU, SL

CLARKE, PEL

CLAYTON, JC

CLOWES, SG

机构：

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

[2] UNIV BOLOGNA,DIPARTIMENTO 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] CAVENDISH LAB,CAMBRIDGE CB3 OHE,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 LAB 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 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] CENS,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：

PHYSICS LETTERS B | 1995年 / 353卷 / 04期

基金：

加拿大自然科学与工程研究理事会; 以色列科学基金会; 美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(95)00633-V

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the multiplicity of charm quark pairs arising from gluon splitting in a sample of about 3.5 million hadronic Z(0) decays. By selecting a 3-jet event topology and tagging charmed hadrons in the lowest energy jet using leptons, we established a signature of heavy quark pair production from gluons. The average number of gluons splitting into a c ($) over bar c pair per hadronic event was measured to be ($) over bar n(g--c ($) over bar c)=(2.27 +/- 0.28 +/- 0.41)x10(-2).

引用

页码：595 / 605

页数：11

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