Inclusive J, Psi' and Chi(c) production in hadronic Z decays

被引：3
作者：
Acciarri, M [1 ]
Adriani, O
AguilarBenitez, M
Ahlen, S
Alcaraz, J
Alemanni, G
Allaby, J
Aloisio, A
Alverson, G
Alviggi, MG
Ambrosi, G
Anderhub, H
Andreev, VP
Angelescu, T
Anselmo, F
Arefiev, A
Azemoon, T
Aziz, T
Bagnaia, P
Baksay, L
Ball, RC
Banerjee, S
Banerjee, S
Banicz, K
Barczyk, A
Barillere, R
Barone, L
Bartalini, P
Baschirotto, A
Basile, M
Battiston, R
Bay, A
Becattini, F
Becker, U
Behner, F
Berdugo, J
Berges, P
Bertucci, B
Betev, BL
Bhattacharya, S
Biasini, M
Biland, A
Bilei, GM
Blaising, JJ
Blyth, SC
Bobbink, GJ
Bock, R
Bohm, A
Boldizsar, L
Borgia, B
机构：
[1] RHEIN WESTFAL TH AACHEN, INST PHYS 3, D-52056 AACHEN, GERMANY
[2] NIKHEF, NATL INST HIGH ENERGY PHYS, NL-1009 DB AMSTERDAM, NETHERLANDS
[3] UNIV AMSTERDAM, NL-1009 DB AMSTERDAM, NETHERLANDS
[4] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA
[5] LAB ANNECY LE VIEUX PHYS PARTICULES, LAPP, CNRS, IN2P3, F-74941 ANNECY LE VIEUX, FRANCE
[6] JOHNS HOPKINS UNIV, BALTIMORE, MD 21218 USA
[7] UNIV BASEL, INST PHYS, CH-4056 BASEL, SWITZERLAND
[8] INST HIGH ENERGY PHYS, BEIJING 100039, PEOPLES R CHINA
[9] HUMBOLDT UNIV BERLIN, D-10099 BERLIN, GERMANY
[10] UNIV BOLOGNA, I-40126 BOLOGNA, ITALY
[11] IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY
[12] TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA
[13] BOSTON UNIV, BOSTON, MA 02215 USA
[14] NORTHEASTERN UNIV, BOSTON, MA 02115 USA
[15] INST ATOM PHYS, R-76900 BUCHAREST, ROMANIA
[16] UNIV BUCHAREST, R-76900 BUCHAREST, ROMANIA
[17] HUNGARIAN ACAD SCI, CENT RES INST PHYS, H-1525 BUDAPEST 114, HUNGARY
[18] HARVARD UNIV, CAMBRIDGE, MA 02139 USA
[19] MIT, CAMBRIDGE, MA 02139 USA
[20] IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY
[21] UNIV FLORENCE, I-50125 FLORENCE, ITALY
[22] CERN, EUROPEAN LAB PARTICLE PHYS, CH-1211 GENEVA 23, SWITZERLAND
[23] WORLD LAB, FBLJA PROJECT, CH-1211 GENEVA 23, SWITZERLAND
[24] UNIV GENEVA, CH-1211 GENEVA 4, SWITZERLAND
[25] CHINESE UNIV SCI & TECHNOL, USTC, HEFEI 230029, ANHUI, PEOPLES R CHINA
[26] RES INST HIGH ENERGY PHYS, SEFT, SF-00014 HELSINKI, FINLAND
[27] UNIV LAUSANNE, CH-1015 LAUSANNE, SWITZERLAND
[28] IST NAZL FIS NUCL, I-73100 LECCE, ITALY
[29] UNIV LECCE, I-73100 LECCE, ITALY
[30] LOS ALAMOS NATL LAB, LOS ALAMOS, NM 87544 USA
[31] UNIV LYON 1, CNRS, IN2P3, INST PHYS NUCL LYON, F-69622 VILLEURBANNE, FRANCE
[32] CIEMAT, E-28040 MADRID, SPAIN
[33] IST NAZL FIS NUCL, I-20133 MILAN, ITALY
[34] INST THEORET & EXPT PHYS, MOSCOW 117259, RUSSIA
[35] IST NAZL FIS NUCL, I-80125 NAPLES, ITALY
[36] UNIV NAPLES, I-80125 NAPLES, ITALY
[37] UNIV CYPRUS, DEPT NAT SCI, NICOSIA, CYPRUS
[38] UNIV NIJMEGEN, NL-6525 ED NIJMEGEN, NETHERLANDS
[39] NATL INST NUCL PHYS & HIGH ENERGY PHYS, NL-6525 ED NIJMEGEN, NETHERLANDS
[40] OAK RIDGE NATL LAB, OAK RIDGE, TN 37831 USA
[41] CALTECH, PASADENA, CA 91125 USA
[42] IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY
[43] UNIV PERUGIA, I-06100 PERUGIA, ITALY
[44] CARNEGIE MELLON UNIV, PITTSBURGH, PA 15213 USA
[45] PRINCETON UNIV, PRINCETON, NJ 08544 USA
[46] IST NAZL FIS NUCL, I-00185 ROME, ITALY
[47] UNIV ROMA LA SAPIENZA, I-00185 ROME, ITALY
[48] RUSSIAN ACAD SCI, INST NUCL PHYS, ST PETERSBURG, RUSSIA
[49] UNIV SALERNO, I-84100 SALERNO, ITALY
[50] IST NAZL FIS NUCL, I-84100 SALERNO, ITALY
来源：
PHYSICS LETTERS B | 1997年 / 407卷 / 3-4期
关键词：
D O I：
10.1016/S0370-2693(97)00790-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report on measurements of the inclusive production of J, psi' and chi(c) mesons in hadronic Z decays, based on 3.2 million hadronic events collected using the L3 detector at LEP. The J and psi' mesons are reconstructed through their decays into lepton pairs, while the chi(c) mesons are reconstructed via the decay mode chi(c) --> J + gamma. The measured branching fractions are: Br(Z --> J + X) = (3.40 +/- 0.23 (stat.) +/- 0.27 (sys.)) x 10(-3), Br(Z --> psi' + X) = (1.6 +/- 0.5 (stat.) +/- 0.3 (sys.)) x 10(-3) Br(Z --> chi(cl) + X) = (2.7 +/- 0.6 (stat.) +/- 0.5 (sys.)) x 10(-3). In the absence of a clear chi(c2) signal, the upper limit at 90% C.L. is set: Br(Z --> chi(c2) + X) < 3.2 x 10(-3). (C) 1997 Elsevier Science B.V.
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页码：351 / 360
页数：10
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