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

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.

引用

页码：351 / 360

页数：10

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