CLASSIFICATION OF THE HADRONIC DECAYS OF THE Z0 INTO B-QUARK AND C-QUARK PAIRS USING A NEURAL NETWORK

被引：42

作者：

ABREU, P

ADAM, W

ADYE, T

AGASI, E

ALEKSEEV, GD

ALGERI, A

ALLEN, P

ALMEHED, S

ALVSVAAG, SJ

AMALDI, U

ANASSONTZIS, EG

ANDREAZZA, A

ANTILOGUS, P

APEL, WD

APSIMON, RJ

ASMAN, B

AUGUSTIN, JE

AUGUSTINUS, A

BAILLON, P

BAMBADE, P

BARAO, F

BARATE, R

BARBIELLINI, G

BARDIN, DY

BARKER, G

BARONCELLI, A

BARRING, O

BARRIO, JA

BARTL, W

BATES, MJ

BATTAGLIA, M

BAUBILLIER, M

BECKS, KH

BEESTON, CJ

BEGALLI, M

BEILLIERE, P

BELOKOPYTOV, Y

BELTRAN, P

BENEDIC, D

BENVENUTI, AC

BERGGREN, M

BERTRAND, D

BIANCHI, F

BILENKY, MS

BILLOIR, P

BJARNE, J

BLOCH, D

BLYTH, S

BOCCI, V

BOGOLUBOV, PN

机构：

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

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

[3] UNIV UPPSALA, DEPT RADIAT SCI, S-75121 UPPSALA, SWEDEN

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

[5] INFN, I-16146 GENOA, ITALY

[6] IOWA STATE UNIV SCI & TECHNOL, DEPT PHYS, AMES, IA 50011 USA

[7] IOWA STATE UNIV SCI & TECHNOL, AMES LAB, AMES, IA 50011 USA

[8] UNIV WARSAW, PL-00681 WARSAW, POLAND

[9] UNIV ETAT MONS, FAC SCI, B-7000 MONS, BELGIUM

[10] AUSTRIAN ACAD SCI, INST HOCHENERGIEPHYS, A-1050 VIENNA, AUSTRIA

[11] NATL INST NUCL PHYS & HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS

[12] DUBNA JOINT NUCL RES INST, MOSCOW 101000, USSR

[13] UNIV GESAMTHSCH WUPPERTAL, FACHBEREICH PHYS, W-5600 WUPPERTAL 1, GERMANY

[14] UNIV VALENCIA, DFAMN, E-46100 BURJASSOT, SPAIN

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

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

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

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

[19] UNIV MILANO, DIPARTIMENTO FIS, I-20133 MILAN, ITALY

[20] UNIV LYON, F-69622 VILLEURBANNE, FRANCE

[21] UNIV GRENOBLE 1, INST SCI NUCL, F-38026 GRENOBLE, FRANCE

[22] INFN, I-34127 TRIESTE, ITALY

[23] UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY

[24] UNIV OXFORD, NUCL PHYS LAB, OXFORD OX1 3RH, ENGLAND

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

[26] UNIV COMPLUTENSE MADRID, E-28040 MADRID, SPAIN

[27] PONTIFICIA UNIV CATOLICA, DEPT FIS, BR-22453 RIO DE JANEIRO, BRAZIL

[28] COLL FRANCE, PHYS CORPUSCULAIRE LAB, F-75231 PARIS 05, FRANCE

[29] NCSR DEMOKRITOS, INST NUCL PHYS, GR-15310 ATHENS, GREECE

[30] ULP, CTR RECHERCHE NUCL, IN2P3, CNRS, F-67037 STRASBOURG, FRANCE

[31] INFN, I-40126 BOLOGNA, ITALY

[32] VUB, ULB, IIHE, B-1050 BRUSSELS, BELGIUM

[33] INFN, I-00173 ROME, ITALY

[34] UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, I-10125 TURIN, ITALY

[35] INFN, I-10125 TURIN, ITALY

[36] UNIV ROME 2, DIPARTIMENTO FIS, I-00173 ROME, ITALY

[37] CTR ETUD SACLAY, DAPNIA, DSM, F-91191 GIF SUR YVETTE, FRANCE

[38] UNIV LIVERPOOL, DEPT PHYS, LIVERPOOL L69 3BX, ENGLAND

[39] INST JOZEF STEFAN, LJUBLJANA, SLOVENIA

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

[41] INFN, I-35131 PADUA, ITALY

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

[43] UNIV SANTANDER, FAC CIENCIAS, E-39005 SANTANDER, SPAIN

[44] NIELS BOHR INST, DK-2100 COPENHAGEN 0, DENMARK

[45] INST NUCL STUDIES, PL-00681 WARSAW, POLAND

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

[47] UNIV AIX MARSEILLE 2, F-13288 MARSEILLE 09, FRANCE

[48] INST NUCL PHYS, HIGH ENERGY PHYS LAB, PL-30055 KRAKOW 30, POLAND

[49] PROTVINO HIGH ENERGY PHYS INST, PROTVINO 142284, USSR

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

来源：

PHYSICS LETTERS B | 1992年 / 295卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(92)91580-3

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A classifier based on a feed-forward neural network has been used for separating a sample of about 123 500 selected hadronic decays of the Z0, collected by DELPHI during 1991, into three classes according to the flavour of the original quark pair: uuBAR + ddBAR + ssBAR (unresolved), ccBAR and bbBAR. The classification has been used to compute the partial widths of the ZO into b and c quark pairs. This gave GAMMA(ccBAR)/GAMMA(h) = 0.151 +/- 0.008 (stat.) +/- 0.041 (syst.), GAMMA(bbBAR)/GAMMA(h) = 0.232 +/- 0.005 (stat.) +/- 0.017 (syst.).

引用

页码：383 / 395

页数：13

共 24 条

[1] Aarnio P, 1991, NUCL INSTRUM METH A, V303, P233
[2] MEASUREMENT OF THE RATE OF THE DECAY KL-]E+E-GAMMA AND OBSERVATION OF A FORM-FACTOR IN THIS DECAY
BARR, GD
CAROSI, R
COWARD, D
CUNDY, D
DOBLE, N
GATIGNON, L
GIBSON, V
GRAFSTROM, P
HAGELBERG, R
KESSELER, G
VANDERLANS, J
NELSON, HN
WAHL, H
BLACK, R
CANDLIN, DJ
MUIR, J
PEACH, KJ
BLUMER, H
HEINZ, R
KLEINKNECHT, K
MAYER, P
PANZER, B
RENK, B
ROHRER, H
AUGE, E
CHASE, RL
FOURNIER, D
HEUSSE, P
ICONOMIDOUFAYARD, L
HARRUS, I
SCHAFFER, AC
BIGI, A
CALAFIURA, P
CALVETTI, M
CASALI, R
CERRI, C
FANTECHI, R
MANNELLI, I
NAPPI, A
PIERAZZINI, GM
BURKHARDT, H
HOLDER, M
KREUTZ, A
QUAST, G
ROST, M
SANDER, HG
WEIHS, W
WERTHENBACH, R
ZECH, G
[J]. PHYSICS LETTERS B, 1990, 240 (1-2) : 283 - 288
[3] ABREU P, 1992, CERNPPE9279
[4] ABREU P, IN PRESS Z PHYS C
[5] MEASUREMENTS OF Z0-]BBARB DECAYS AND THE SEMILEPTONIC BRANCHING RATIO BR(B-]L+X)
ADEVA, B
[J]. PHYSICS LETTERS B, 1991, 261 (1-2) : 177 - 187
[6] A STUDY OF HEAVY FLAVOR PRODUCTION USING MUONS IN HADRONIC Z0 DECAYS
AKRAWY, MZ
[J]. PHYSICS LETTERS B, 1991, 263 (02) : 311 - 324
[7] BAHAN G, MANHEP921 MANCH PREP
[8] BARTEL W, 1986, Z PHYS C PART FIELDS, V33, P23, DOI 10.1007/BF01410449
[9] USING NEURAL NETWORKS WITH JET SHAPES TO IDENTIFY B-JETS IN E+E- INTERACTIONS
BELLANTONI, L
CONWAY, JS
JACOBSEN, JE
PAN, YB
WU, SL
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1991, 310 (03) : 618 - 622
[10] TAGGING THE DECAYS OF THE Z0 BOSON INTO B-QUARK PAIRS WITH A NEURAL NETWORK CLASSIFIER
BORTOLOTTO, C
DEANGELIS, A
LANCERI, L
[J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1991, 306 (03) : 459 - 466

← 1 2 3 →