Measurement of the spin density matrix for the rho(0), K*(0)(892) and phi produced in Z(0) decays

被引：42

作者：

Abreu, P

Adam, W

Adye, T

Alekseev, GD

Alemany, R

Allport, PP

Almehed, S

Amaldi, U

Amato, S

Andersson, P

Andreazza, A

Antilogus, P

Apel, WD

Arnoud, Y

Asman, B

Augustin, JE

Augustinus, A

Baillon, P

Bambade, P

Barao, F

Barbi, M

Barbiellini, G

Bardin, DY

Barker, G

Baroncelli, A

Barring, O

Bates, MJ

Battaglia, M

Baubillier, M

Baudot, J

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Benvenuti, AC

Berat, C

Berggren, M

Bertini, D

Bertrand, D

Besancon, M

Bianchi, F

Bigi, M

Bilenky, MS

Billoir, P

Bizouard, MA

Bloch, D

Blume, M

Bonesini, M

Bonivento, W

Booth, PSL

机构：

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

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

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

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

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

[6] UNIV BOLOGNA,DIPARTMENTO FIS,I-40126 BOLOGNA,ITALY

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

[8] PONTIFICIA UNIV CATOLICA RIO DE JANEIRO,DEPT FIS,BR-22290 RIO JANEIRO,BRAZIL

[9] COMENIUS UNIV BRATISLAVA,FAC MATH & PHYS,SK-84215 BRATISLAVA,SLOVAKIA

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

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

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

[13] UNIV STRASBOURG 1,CNRS,IN2P3,INST RECH SUBATOM,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,CZ-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,IN2P3,CNRS,INST NUCL SCI,F-38026 GRENOBLE,FRANCE

[19] HELSINKI INST PHYS,FIN-00014 HELSINKI,FINLAND

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

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

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

[23] STANISLAW STASZIC UNIV MIN & MET,PL-30055 KRAKOW,POLAND

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

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

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

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

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

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

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

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

[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,NUCL CTR,MFF,NC,CR-18000 PRAGUE 8,CZECH REPUBLIC

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

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

[39] UNIV OVIEDO,DEPT FIS,E-33007 OVIEDO,SPAIN

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

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

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

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

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

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

[46] CENS,CEA,DAPNIA,SERV PHYS PARTICULES,F-91191 GIF SUR YVETTE,FRANCE

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

[48] UC,CSIC,INST FIS CANTABRIA,SANTANDER 39006,SPAIN

[49] INST HIGH ENERGY PHYS,PROTVINO,MOSCOW REGION,RUSSIA

[50] JOZEF STEFAN INST,SI-1000 LJUBLJANA,SLOVENIA

来源：

PHYSICS LETTERS B | 1997年 / 406卷 / 03期

关键词：

D O I：

10.1016/S0370-2693(97)00758-2

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The spin density matrix elements for the rho(0), K-*0(892) and phi produced in hadronic Z(0) decays are measured in the DELPHI detector. There is no evidence for spin alignment of the K-*0(892) and phi, in the region x(p) less than or equal to 0.3 (x(p) = p/p(beam)), where rho(00) = 0.33 +/- 0.05 and rho(00) = 0.30 +/- 0.04, respectively. In the fragmentation region, x(p) greater than or equal to 0.4, there is some indication for spin alignment of the rho(0) and K-*0(892), since rho(00) = 0.43 +/- 0.05 and rho(00) = 0.46 +/- 0.08, respectively. These values are compared with those found in meson-induced hadronic reactions. For the phi, rho(00) = 0.30 +/- 0.04 for x(p) greater than or equal to 0.4 and 0.55 +/- 0.10 for x(p) greater than or equal to 0.7. The off-diagonal spin density matrix element rho(1-1) is consistent with zero in all cases. (C) 1997 Published by Elsevier Science B.V.

引用

页码：271 / 286

页数：16

共 31 条

[1]

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

[2] MEASUREMENT OF THE SPIN-DENSITY MATRIX OF D-STAR MESONS PRODUCED IN E+E- ANNIHILATIONS [J].

ABACHI, S ;

AKERLOF, C ;

BARINGER, P ;

BLOCKUS, D ;

BRABSON, B ;

BROM, JM ;

BYLSMA, BG ;

CHAPMAN, J ;

CORK, B ;

DEBONTE, R ;

DERRICK, M ;

ERREDE, D ;

JUNG, C ;

KEN, MT ;

KOLTICK, D ;

KOOIJMAN, P ;

LOOS, JS ;

LOW, EH ;

MCILWAIN, RL ;

MEYER, DI ;

MILLER, DH ;

MUSGRAVE, B ;

NEAL, H ;

NG, CR ;

NITZ, D ;

OGREN, H ;

PAIK, HW ;

PRICE, LE ;

REPOND, J ;

RUST, DR ;

SHIBATA, EI ;

SUGANO, K ;

THUN, R ;

TSCHIRHART, R .

PHYSICS LETTERS B, 1987, 199 (04) :585-590

[3] Double Higgs production at the linear colliders and the probing of the Higgs self-coupling [J].

Boudjema, F ;

Chopin, E .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1996, 73 (01) :85-109

[4] Double Higgs production at the linear colliders and the probing of the Higgs self-coupling [J].

Boudjema, F ;

Chopin, E .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1996, 73 (01) :85-109

[5] MEASUREMENT OF DELTA(++)(1232) PRODUCTION IN HADRONIC-Z-DECAYS [J].

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 ;

ANYKEYEV, V ;

APEL, WD ;

ARNOUD, Y ;

ASMAN, B ;

AUGUSTIN, JE ;

AUGUSTINUS, A ;

BAILLON, P ;

BAMBADE, P ;

BARAO, F ;

BARATE, R ;

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 ;

BENVENUTI, AC ;

BERGGREN, M ;

BERTRAND, D ;

BIANCHI, F ;

BIGI, M ;

BILENKY, MS ;

BILLOIR, P ;

BLOCH, D ;

BLUME, M ;

BLYTH, S ;

BOCCI, V .

PHYSICS LETTERS B, 1995, 361 (1-4) :207-220

[6]

ABREU P, 1995, Z PHYS C PART FIELDS, V65, P587, DOI 10.1007/BF01578668

[7] Performance of the DELPHI detector [J].

Abreu, P ;

Adam, W ;

Adye, T ;

Agasi, E ;

Ajinenko, I ;

Aleksan, R ;

Alekseev, GD ;

Alemany, R ;

Allport, PP ;

Almehed, S ;

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 ;

Baroncelli, A ;

Barring, O ;

Barrio, JA ;

Bartl, W ;

Bates, MJ ;

Battaglia, M ;

Baubillier, M ;

Baudot, J ;

Becks, KH ;

Begalli, M ;

Beilliere, P ;

Belokopytov, Y ;

Benvenuti, AC ;

Berggren, M ;

Bertrand, D ;

Bianchi, F ;

Bigi, M ;

Bilenky, MS ;

Billoir, P ;

Bloch, D ;

Blume, M ;

Blyth, S ;

Bolognese, T .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 378 (1-2) :57-100

[8]

ABREU P, 1995, Z PHYS C PART FIELDS, V68, P353

[9]

ACKERSTAFF K, UNPUB Z PHYS C

[10]

AGABABYAN NM, 1990, Z PHYS C PART FIELDS, V46, P387, DOI 10.1007/BF01621026

← 1 2 3 4 →