Measurement of the multiplicity of gluons splitting to bottom quark pairs in hadronic Z(0) decays

被引：36

作者：

Abreu, P

Adam, W

Adye, T

Ajinenko, I

Alekseev, GD

Alemany, R

Allport, PP

Almehed, S

Amaldi, U

Amato, S

Andersson, P

Andreazza, A

Antilogus, P

Apel, WD

Asman, B

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Barao, F

Barbi, M

Barbiellini, G

Bardin, DY

Barker, G

Baroncelli, A

Barring, O

Bates, MJ

Battaglia, M

Baubillier, M

Baudot, J

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Belous, K

Benvenuti, AC

Berggren, M

Bertini, D

Bertrand, D

Besancon, M

Bianchi, F

Bigi, M

Bilenky, MS

Billoir, P

Bizouard, MA

Bloch, D

Blume, M

Bonesini, M

Bonivento, W

Booth, PSL

机构：

[1] IOWA STATE UNIV,DEPT PHYS & ASTRON,AMES,IA 50011

[2] UNIV INSTELLING ANTWERP,DEPT PHYS,B-2610 WILRIJK,BELGIUM

[3] FREE UNIV BRUSSELS,VUB,IIHE,B-1050 BRUSSELS,BELGIUM

[4] UNIV MONS,FAC SCI,B-7000 MONS,BELGIUM

[5] UNIV ATHENS,PHYS LAB,GR-10680 ATHENS,GREECE

[6] UNIV BERGEN,DEPT PHYS,N-5007 BERGEN,NORWAY

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

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

[9] CTR BRASILEIRO PESQUISAS FIS,BR-22290 RIO JANEIRO,RJ,BRAZIL

[10] UNIV ESTADUAL RIO DE JANEIRO,INST FIS,RIO JANEIRO,BRAZIL

[11] COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,SK-84215 BRATISLAVA,SLOVAKIA

[12] COLL FRANCE,PHYS CORPUSCULAIRE LAB,IN2P3,CNRS,F-75231 PARIS 05,FRANCE

[13] CERN,CH-1211 GENEVA 23,SWITZERLAND

[14] UNIV STRASBOURG 1,CNRS,IN2P3,CTR RECH NUCL,F-67037 STRASBOURG,FRANCE

[15] NATL CTR SCI RES DEMOKRITOS,INST NUCL PHYS,GR-15310 ATHENS,GREECE

[16] CAS,FZU,INST PHYS,DIV HIGH ENERGY PHYS,PRAGUE 18040 8,CZECH REPUBLIC

[17] UNIV GENOA,DIPARTIMENTO FIS,I-16146 GENOA,ITALY

[18] IST NAZL FIS NUCL,I-16146 GENOA,ITALY

[19] UNIV GRENOBLE 1,IN2P3,CNRS,INST NUCL SCI,F-38026 GRENOBLE,FRANCE

[20] HELSINKI INST PHYS,FIN-00014 HELSINKI,FINLAND

[21] JOINT INST NUCL RES DUBNA,MOSCOW 101000,RUSSIA

[22] UNIV KARLSRUHE,INST EXPT KERNPHYS,D-76128 KARLSRUHE,GERMANY

[23] INST NUCL PHYS,PL-30055 KRAKOW,POLAND

[24] STANISLAW STASZIC UNIV MIN & MET,PL-30055 KRAKOW,POLAND

[25] UNIV PARIS 11,ACCELERATEUR LINEAIRE LAB,IN2P3,CNRS,F-91405 ORSAY,FRANCE

[26] UNIV LANCASTER,SCH PHYS & CHEM,LANCASTER LA1 4YB,ENGLAND

[27] UNIV LIVERPOOL,DEPT PHYS,LIVERPOOL L69 3BX,MERSEYSIDE,ENGLAND

[28] UNIV PARIS 06,LPNHE,IN2P3,CNRS,F-75252 PARIS 05,FRANCE

[29] UNIV PARIS 07,LPNHE,IN2P3,CNRS,F-75252 PARIS 05,FRANCE

[30] LUND UNIV,DEPT PHYS,S-22363 LUND,SWEDEN

[31] UNIV LYON 1,IN2P3,CNRS,IPNL,F-69622 VILLEURBANNE,FRANCE

[32] UNIV AIX MARSEILLE 2,CPP,IN2P3,CNRS,F-13288 MARSEILLE 09,FRANCE

[33] UNIV MILAN,DIPARTIMENTO FIS,I-20133 MILAN,ITALY

[34] IST NAZL FIS NUCL,I-20133 MILAN,ITALY

[35] NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK

[36] CHARLES UNIV,NC,NUCL CTR MFF,AREAL MFF,CR-18000 PRAGUE 8,CZECH REPUBLIC

[37] NIKHEF H,NL-1009 DB AMSTERDAM,NETHERLANDS

[38] NATL TECH UNIV ATHENS,DEPT PHYS,GR-15773 ATHENS,GREECE

[39] UNIV OSLO,DEPT PHYS,N-1000 OSLO 3,NORWAY

[40] UNIV OVIEDO,DEPT FIS,E-33007 OVIEDO,SPAIN

[41] UNIV OXFORD,DEPT PHYS,OXFORD OX1 3RH,ENGLAND

[42] UNIV PADUA,DIPARTIMENTO FIS,I-35131 PADUA,ITALY

[43] IST NAZL FIS NUCL,I-35131 PADUA,ITALY

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

[45] UNIV ROMA TOR VERGATA,DIPARTIMENTO FIS,I-00173 ROME,ITALY

[46] IST NAZL FIS NUCL,I-00173 ROME,ITALY

[47] CTR ETUD SACLAY,CEA,DAPNIA,SERV PHYS PARTICULES,F-91191 GIF SUR YVETTE,FRANCE

[48] IST NAZL FIS NUCL,IST SUPER SANITA,I-00161 ROME,ITALY

[49] CSIC,UC,INST FIS CANTABRIA,SANTANDER 39006,SPAIN

[50] INST HIGH ENERGY PHYS,PROTVINO,MOSCOW REGION,RUSSIA

来源：

PHYSICS LETTERS B | 1997年 / 405卷 / 1-2期

关键词：

D O I：

10.1016/S0370-2693(97)00608-4

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

An inclusive measurement of the average multiplicity of b (b) over bar pairs from gluons, g(b (b) over bar), in hadronic Z(0) events collected by the DELPHI experiment at LEP, is presented. A counting technique, based on jet b-tagging in 4-jet events, has been used. Looking for secondary bottom production in events with production of any primary flavour, by requiring two b-tagged jets in well defined topological configurations, gave g(b (b) over bar) = (0.21 +/- 0.11(stat) +/- 0.09(syst))%. This result was checked with a different method designed to select events with four b quarks in the final state. Agreement within the errors was found. (C) 1997 Elsevier Science B.V.

引用

页码：202 / 214

页数：13

共 23 条

[1]

Aarnio P, 1991, NUCL INSTRUM METH A, V303, P233

[2] Performance of the DELPHI detector [J].

Abreu, P ;

Adam, W ;

Adye, T ;

Agasi, E ;

Ajinenko, I ;

Aleksan, R ;

Alekseev, GD ;

Alemany, R ;

Allport, PP ;

Almehed, S ;

Alvsvaag, SJ ;

Amaldi, U ;

Amato, S ;

Andreazza, A ;

Andrieux, ML ;

Antilogus, P ;

Apel, WD ;

Arnoud, Y ;

Asman, B ;

Augustin, JE ;

Augustinus, A ;

Baillon, P ;

Bambade, P ;

Barao, F ;

Barate, R ;

Barbiellini, G ;

Bardin, DY ;

Baroncelli, A ;

Barring, O ;

Barrio, JA ;

Bartl, W ;

Bates, MJ ;

Battaglia, M ;

Baubillier, M ;

Baudot, J ;

Becks, KH ;

Begalli, M ;

Beilliere, P ;

Belokopytov, Y ;

Benvenuti, AC ;

Berggren, M ;

Bertrand, D ;

Bianchi, F ;

Bigi, M ;

Bilenky, MS ;

Billoir, P ;

Bloch, D ;

Blume, M ;

Blyth, S ;

Bolognese, T .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 378 (1-2) :57-100

[3]

ABREU P, 1995, Z PHYS C PART FIELDS, V65, P555

[4] WPHACT 1.0 - A program for WW, Higgs and four-Fermion physics at e(+)e(-) colliders [J].

Accomando, E ;

Ballestrero, A .

COMPUTER PHYSICS COMMUNICATIONS, 1997, 99 (2-3) :270-296

[5]

AKERS A, 1995, Z PHYS C, V67, P57

[6] MEASUREMENT OF THE MULTIPLICITY OF CHARM QUARK PAIRS FROM GLUONS IN HADRONIC Z(0) DECAYS [J].

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 .

PHYSICS LETTERS B, 1995, 353 (04) :595-605

[7] Observation of Y production in hadronic Z(0) decays [J].

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 ;

Bechtluft, J ;

Beck, GA ;

Beeston, C ;

Behnke, T ;

Bell, AN ;

Bell, KW ;

Bella, G ;

Bentvelsen, S ;

Berlich, P ;

Bethke, S ;

Biebel, O ;

Bloodworth, IJ ;

Bloomer, JE ;

Bock, P ;

Bosch, HM ;

Boutemeur, M ;

Bouwens, BT ;

Braibant, S ;

BrightThomas, P ;

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 ;

Clowes, SG .

PHYSICS LETTERS B, 1996, 370 (1-2) :185-194

[8]

BARTEL W, 1986, Z PHYS C PART FIELDS, V33, P23, DOI 10.1007/BF01410449

[9] 4-JET EVENTS IN E+E- ANNIHILATION - TESTING THE 3-GLUON VERTEX [J].

BENGTSSON, M ;

ZERWAS, PM .

PHYSICS LETTERS B, 1988, 208 (02) :306-308

[10] EXPERIMENTAL INVESTIGATION OF THE ENERGY-DEPENDENCE OF THE STRONG COUPLING STRENGTH [J].

BETHKE, S ;

ALLISON, J ;

AMBRUS, K ;

BARLOW, RJ ;

BARTEL, W ;

BOWDERY, CK ;

CARTWRIGHT, SL ;

CHRIN, J ;

CLARKE, D ;

DIECKMANN, A ;

DUERDOTH, IP ;

ECKERLIN, G ;

ELSEN, E ;

FELST, R ;

FINCH, AJ ;

FOSTER, F ;

GREENSHAW, T ;

HAGEMANN, J ;

HAIDT, D ;

HEINTZE, J ;

HEINZELMANN, G ;

HELLENBRAND, KH ;

HILL, P ;

HUGHES, G ;

KADO, H ;

KAWAGOE, K ;

KLEINWORT, C ;

KNIES, G ;

KOBAYASHI, T ;

KOMAMIYA, S ;

KREHBIEL, H ;

VONKROGH, J ;

KUHLEN, M ;

LOEBINGER, FK ;

MACBETH, AA ;

MAGNUSSEN, N ;

MARSHALL, R ;

MEINKE, R ;

MIDDLETON, RP ;

MINOWA, M ;

MURPHY, PG ;

NAROSKA, B ;

NYE, JM ;

OLSSON, J ;

OULDSAADA, F ;

PETERSEN, A ;

RAMCKE, R ;

RIESEBERG, H ;

SCHMIDT, D ;

VONDERSCHMITT, H .

PHYSICS LETTERS B, 1988, 213 (02) :235-241

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