CHI(C)-PRODUCTION IN HADRONIC Z-DECAYS

被引：19

作者：

ADRIANI, O

AGUILARBENITEZ, M

AHLEN, S

ALCARAZ, J

ALOISIO, A

ALVERSON, G

ALVIGGI, MG

AMBROSI, G

AN, Q

ANDERHUB, H

ANDERSON, AL

ANDREEV, VP

ANGELESCU, T

ANTONOV, L

ANTREASYAN, D

ARCE, P

AREFIEV, A

ATAMANCHUK, A

AZEMOON, T

AZIZ, T

BABA, PVKS

BAGNAIA, P

BAKKEN, JA

BALL, RC

BANERJEE, S

BAO, J

BARILLERE, R

BARONE, L

BASCHIROTTO, A

BATTISTON, R

BAY, A

BECATTINI, F

BECHTLUFT, J

BECKER, R

BECKER, U

BEHNER, F

BEHRENS, J

BENCZE, GL

BERDUGO, J

BERGES, P

BERTUCCI, B

BETEV, BL

BIASINI, M

BILAND, A

BILEI, GM

BIZZARRI, R

BLAISING, JJ

BOBBINK, GJ

BOCK, R

BOHM, A

机构：

[1] UNIV FLORENCE, I-50125 FLORENCE, ITALY

[2] RHEIN WESTFAL TH AACHEN, INST PHYS 1, W-5100 AACHEN, GERMANY

[3] RHEIN WESTFAL TH AACHEN, INST PHYS 3, W-5100 AACHEN, GERMANY

[4] NATL INST HIGH ENERGY PHYS, 1009 DB AMSTERDAM, NETHERLANDS

[5] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA

[6] IN2P3, CNRS, LAB ANNECY LE VIEUX PHYS PARTICULES, F-74941 ANNECY LE VIEUX, FRANCE

[7] JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA

[8] INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA

[9] INFN, I-40126 BOLOGNA, ITALY

[10] TATA INST FUNDAMENTAL RES, BOMBAY 400005, INDIA

[11] BOSTON UNIV, BOSTON, MA 02215 USA

[12] NORTHEASTERN UNIV, BOSTON, MA 02115 USA

[13] INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA

[14] UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA

[15] HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY

[16] HARVARD UNIV, CAMBRIDGE, MA 02139 USA

[17] MIT, CAMBRIDGE, MA 02139 USA

[18] CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND

[19] FBLJA PROJECT, WORLD LAB, CH-1211 GENEVA 23, SWITZERLAND

[20] UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND

[21] CHINESE UNIV SCI & TECHNOL, HEFEI 230029, PEOPLES R CHINA

[22] UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND

[23] LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA 94550 USA

[24] LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA

[25] UNIV LYON 1, IN2P3, CNRS, INST PHYS NUCL LYON, F-69622 VILLEURBANNE, FRANCE

[26] CIEMAT, E-28040 MADRID, SPAIN

[27] INFN, I-20133 MILAN, ITALY

[28] MOSCOW THEORET & EXPTL PHYS INST, MOSCOW, RUSSIA

[29] INFN, I-80125 NAPLES, ITALY

[30] UNIV NAPLES, I-80125 NAPLES, ITALY

[31] UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS

[32] CATHOLIC UNIV NIJMEGEN, 6525 ED NIJMEGEN, NETHERLANDS

[33] NATL INST NUCL PHYS & HIGH ENERGY PHYS, 6525 ED NIJMEGEN, NETHERLANDS

[34] OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA

[35] CALTECH, PASADENA, CA 91125 USA

[36] INFN, I-06100 PERUGIA, ITALY

[37] UNIV PERUGIA, I-06100 PERUGIA, ITALY

[38] CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA

[39] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[40] INFN, I-00185 ROME, ITALY

[41] UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY

[42] ST PETERSBURG NUCL PHYS INST, ST PETERSBURG, RUSSIA

[43] UNIV CALIF SAN DIEGO, LA JOLLA, CA 92093 USA

[44] UNIV SANTIAGO, DEPT FIS PARTICULAS ELEMENTALES, E-15706 SANTIAGO, SPAIN

[45] SHANGHAI INST CERAM, SHANGHAI, PEOPLES R CHINA

[46] BULGARIAN ACAD SCI, INST MECHATRON, BU-1113 SOFIA, BULGARIA

[47] KOREA ADV INST SCI & TECHNOL, CTR HIGH ENERGY PHYS, TAEJON 305701, SOUTH KOREA

[48] UNIV ALABAMA, UNIVERSITY, AL 35486 USA

[49] PURDUE UNIV, W LAFAYETTE, IN 47907 USA

[50] PAUL SCHERRER INST, CH-5232 VILLIGEN, SWITZERLAND

来源：

PHYSICS LETTERS B | 1993年 / 317卷 / 03期

基金：

匈牙利科学研究基金会;

关键词：

D O I：

10.1016/0370-2693(93)91026-J

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on inclusive chi(c) production in Z decays reconstructed via the decay mode chi(c) --> J + gamma. This analysis is based on 1.1 million hadronic Z events. Interpreting the observed signal as chi(c1), we obtain a branching ratio Br(Z --> chi(c1) + X) = (7.5 +/- 2.9(stat.) +/- 0.6(sys.)) x 10(-3). Assuming all events are produced in b decays we obtain Br(b --> chi(c1) + X) = (2.4 +/- 0.9(stat.) +/- 0.2(sys.)) x 10(-2). We also present an improved measurement of the branching ratio Br(Z --> J + X) = (3.6 +/- 0.5(stat.) +/- 0.4(sys.)) x 10(-3), obtained from dileptonic J decays.

引用

页码：467 / 473

页数：7

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