OBSERVATION OF ORBITALLY EXCITED B-MESONS

被引：101

作者：

ABREU, P

ADAM, W

ADYE, T

AGASI, E

AJINENKO, I

ALEKSAN, R

ALEKSEEV, GD

ALLPORT, PP

ALMEHED, S

ALMEIDA, FML

ALVSVAAG, SJ

AMALDI, U

AMATO, S

ANDREAZZA, A

ANDRIEUX, ML

ANTILOGUS, P

APEL, WD

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

BELOKOPYTOV, Y

BELTRAN, P

BENVENUTI, AC

BERGGREN, M

BERTRAND, D

BIANCHI, F

BIGI, M

BILENKY, MS

BILLOIR, P

BJARNE, J

BLOCH, D

机构：

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

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

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

[4] FREE UNIV BRUSSELS,IIHE,B-1050 BRUSSELS,BELGIUM

[5] UNIV MONS,FAC SCI,B-7000 MONS,BELGIUM

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[28] UNIV PARIS 07,IN2P3,LPNHE,CNRS,F-75252 PARIS 05,FRANCE

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

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

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

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

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

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

[35] NIELS BOHR INST,DK-2100 COPENHAGEN O,DENMARK

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

[37] NIKHEF H,1009 DB AMSTERDAM,NETHERLANDS

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

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

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

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

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

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

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

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

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

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

[48] CENS,DSM,DAPNIA,F-91191 GIF SUR YVETTE,FRANCE

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

[50] UNIV CANTABRIA,CSIC,CEAFM,E-39006 SANTANDER,SPAIN

来源：

PHYSICS LETTERS B | 1995年 / 345卷 / 04期

关键词：

D O I：

10.1016/0370-2693(94)01696-A

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Experimental evidence for the existence of orbitally excited B meson states is presented in an analysis of the B pi and B*pi distribution of Q = m(B**) - m(B(*)) - m(pi) using Z(0) decay data taken with the DELPHI detector at LEP. The mean Q-value of the decays B** --> B(*)pi is measured to be 284 +/-5 (stat.) +/- 15 (syst.) MeV/c(2), and the Gaussian width of the signal is 79 +/- 5 (stat.) +/- 8 (syst) MeV/c(2). This signal can be described as a single resonance of mass m = 5732+/-5 (stat.) +/- 20(syst.) MeV/c(2) and full width Gamma = 145 +/- 28 MeV/c(2). The observed shape is also consistent with the production of several broad and narrow states as predicted by the quark model and partly observed in the D-meson sector. The production rate of B** per b-jet is found to be 0.27 +/- 0.02(stat.) +/- 0.06 (syst.).

引用

页码：598 / 608

页数：11

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