Search for promptly produced heavy quarkonium states in hadronic Z decays

被引：19

作者：

Abreu, P

Adam, W

Adye, T

Agasi, E

Ajinenko, I

Aleksan, R

Alekseev, GD

Allport, PP

Almehed, S

Alvsvaag, SJ

Amaldi, U

Amato, S

Andreazza, A

Andrieux, ML

Antilogus, P

Apel, WD

Arnoud, Y

Asman, B

Augustin, A

Baillon, P

Bambade, P

Barao, F

Barate, R

Barbiellini, G

Bardin, DY

Barker, GJ

Baroncelli, A

Barring, O

Barrio, JA

Bartl, W

Bates, MJ

Battaglia, M

Baubillier, M

Baudot, J

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Belous, K

Benvenuti, AC

Berggren, M

Bertrand, D

Bianchi, F

Bigi, M

Bilenky, MS

Billoir, P

Bloch, D

Blume, M

Blyth, S

Bocci, V

机构：

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

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

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

[4] UNIV ETAT 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, DIPARTMENTO FIS, I-40126 BOLOGNA, ITALY

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

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

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

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

[12] COMENIUS UNIV BRATISLAVA, FAC MATH & PHYS, BRATISLAVA 84215, SLOVAKIA

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

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

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

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

[17] CZECH ACAD SCI, DIV HIGH ENERGY PHYS, FZU, INST PHYS, CR-18040 PRAGUE 8, CZECH REPUBLIC

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

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

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

[21] RES INST HIGH ENERGY PHYS, SF-00014 HELSINKI, FINLAND

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

[23] UNIV KARLSRUHE, INST EXPTL KERNPHYS, D-76128 KARLSRUHE, GERMANY

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

[25] UNIV MIN & MET KRAKOW, PL-30055 KRAKOW, POLAND

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

[27] UNIV LANCASTER, SCH PHYS & MAT, LANCASTER LA1 4YB, ENGLAND

[28] FCUL, IST, LIP, P-1000 LISBON, PORTUGAL

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

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

[31] UNIV PARIS 07, F-75252 PARIS 05, FRANCE

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

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

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

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

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

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

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

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

[40] NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS

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

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

[43] UNIV OVIEDO, DEPT FIS, E-33006 OVIEDO, SPAIN

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

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

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

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

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

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

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

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1996年 / 69卷 / 04期

关键词：

D O I：

10.1007/s002880050061

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：

A search has been made for direct production of heavy quarkonium states in more than 3 million hadronic Z(0) decays in the 1991-1994 DELPHI data, Prompt J/psi, psi(2S) and Upsilon candidates have been searched for through their leptonic decay modes using criteria based on the kinematics and decay vertex positions. New upper limits are set at the 90% confidence level for Br(Z(0) --> (Q (Q) over bar) X)/Br(Z(0) --> hadrons) for various strong production mechanisms of J/psi and Upsilon; these range down to 0.9 x 10(-4). The limits are set in the presence of a small excess (similar to 1% statistical probability of a background fluctuation) in the sum of candidates from prompt J/psi, psi(2S), Upsilon(1S), Upsilon(2S) and Upsilon(3S) relative to the estimated background.

引用

页码：575 / 583

页数：9

共 31 条

[1]

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

[2] J/PSI-PRODUCTION IN THE HADRONIC DECAYS OF THE Z [J].

ABREU, P ;

ADAM, W ;

ADYE, T ;

AGASI, E ;

AJINENKO, I ;

ALEKSAN, R ;

ALEKSEEV, GD ;

ALLPORT, PP ;

ALMEHED, S ;

ALMEIDA, FML ;

ALVSVAAG, SJ ;

AMALDI, U ;

ANDREAZZA, A ;

ANTILOGUS, P ;

APEL, WD ;

APSIMON, RJ ;

ARNOUD, Y ;

ASMAN, B ;

AUGUSTIN, JE ;

AUGUSTINUS, A ;

BAILLON, P ;

BAMBADE, P ;

BARAO, F ;

BARATE, R ;

BARBIELLINI, G ;

BARDIN, DY ;

BARKER, GJ ;

BARONCELLI, A ;

BARRING, O ;

BARRIO, JA ;

BARTL, W ;

BATES, MJ ;

BATTAGLIA, M ;

BAUBILLIER, M ;

BAUDOT, J ;

BECKS, KH ;

BEGALLI, M ;

BEILLIERE, P ;

BELTRAN, P ;

BENVENUTI, AC ;

BERGGREN, M ;

BERTRAND, D ;

BIANCHI, F ;

BIGI, M ;

BILENKY, MS ;

BILLOIR, P ;

BJARNE, J ;

BLOCH, D ;

BLOCKI, J ;

BLYTH, S .

PHYSICS LETTERS B, 1994, 341 (01) :109-122

[3]

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

[4]

ABREU P, 1995, EPS HEP 95 C BRUSS

[5] INCLUSIVE J-PRODUCTION IN Z(0) DECAYS [J].

ADRIANI, O ;

AGUILARBENITEZ, M ;

AHLEN, S ;

AKBARI, H ;

ALCARAZ, J ;

ALOISIO, A ;

ALVERSON, G ;

ALVIGGI, MG ;

AMBROSI, G ;

AN, Q ;

ANDERHUB, H ;

ANDERSON, AL ;

ANDREEV, VP ;

ANGELOV, T ;

ANTONOV, L ;

ANTREASYAN, D ;

ARCE, P ;

AREFIEV, A ;

ATAMANCHUK, A ;

AZEMOON, T ;

AZIZ, T ;

BABA, PVKS ;

BAGNAIA, P ;

BAKKEN, JA ;

BAKSAY, L ;

BALL, RC ;

BANERJEE, S ;

BAO, J ;

BARILLERE, R ;

BARONE, L ;

BATTISTON, R ;

BAY, A ;

BECATTINI, F ;

BECKER, U ;

BEHNER, F ;

BEHRENS, J ;

BEINGESSNER, S ;

BENCZE, GL ;

BERDUGO, J ;

BERGES, P ;

BERTUCCI, B ;

BETEV, BL ;

BIASINI, M ;

BILAND, A ;

BILEI, GM ;

BIZZARRI, R ;

BLAISING, JJ ;

BLUMENFELD, B ;

BOBBINK, GJ ;

BOCCIOLINI, M .

PHYSICS LETTERS B, 1992, 288 (3-4) :412-420

[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] Z-BOSON DECAYS TO HEAVY QUARKONIUM [J].

BARGER, V ;

CHEUNG, K ;

KEUNG, WY .

PHYSICAL REVIEW D, 1990, 41 (05) :1541-1546

[8]

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

[9]

BORISOV G, 1994, 9498 IHEP

[10] GLUON FRAGMENTATION INTO P-WAVE HEAVY QUARKONIUM [J].

BRAATEN, E ;

YUAN, TC .

PHYSICAL REVIEW D, 1994, 50 (05) :3176-3180

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