CORRELATION-MEASUREMENTS IN Z-]TAU(+)TAU(-) AND THE TAU-NEUTRINO HELICITY

被引：22

作者：

BUSKULIC, D

DEBONIS, I

DECAMP, D

GHEZ, P

GOY, C

LEES, JP

MINARD, MN

PIETRZYK, B

ARIZTIZABAL, F

COMAS, P

CRESPO, JM

DELFINO, M

EFTHYMIOPOULOS, I

FERNANDEZ, E

FERNANDEZBOSMAN, M

GAITAN, V

GARRIDO, L

MATTISON, T

PACHECO, A

PADILLA, C

PASCUAL, A

CREANZA, D

DEPALMA, M

FARILLA, A

IASELLI, G

MAGGI, G

MARINELLI, N

NATALI, S

NUZZO, S

RANIERI, A

RASO, G

ROMANO, F

RUGGIERI, F

SELVAGGI, G

SILVESTRIS, L

TEMPESTA, P

ZITO, G

CHAI, Y

HU, H

HUANG, D

HUANG, X

LIN, J

WANG, T

XIE, Y

XU, D

XU, R

ZHANG, J

ZHANG, L

ZHAO, W

BONVICINI, G

机构：

[1] UNIV AUTONOMA BARCELONA, INST FIS ALTES ENERGIES, E-08193 BARCELONA, SPAIN

[2] INFN, DIPARTIMENTO FIS, I-70126 BARI, ITALY

[3] ACAD SINICA, INST HIGH ENERGY PHYS, BEIJING, PEOPLES R CHINA

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

[5] UNIV CLERMONT FERRAND, IN2P3, CNRS, PHYS CORPUSCULAIRE LAB, F-63177 CLERMONT FERRAND, FRANCE

[6] NIELS BOHR INST, DK-2100 COPENHAGEN, DENMARK

[7] DEMOCRITOS NUCL RES CTR, ATHENS, GREECE

[8] ECOLE POLYTECH, IN2P3, CNRS, PHYS NUCL & HAUT ENERGIES LAB, F-91128 PALAISEAU, FRANCE

[9] UNIV EDINBURGH, DEPT PHYS, EDINBURGH EH9 3JZ, MIDLOTHIAN, SCOTLAND

[10] UNIV FIRENZE, INFN, DIPARTIMENTO FIS, I-50125 FLORENCE, ITALY

[11] FLORIDA STATE UNIV, SUPERCOMP COMPUTAT RES INST, TALLAHASSEE, FL 32306 USA

[12] FLORIDA STATE UNIV, DEPT PHYS, TALLAHASSEE, FL 32306 USA

[13] INFN, LNF, I-00044 FRASCATI, ITALY

[14] UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW G12 8QQ, SCOTLAND

[15] UNIV HEIDELBERG, INST HOCHENERGIEPHYS, D-69120 HEIDELBERG, GERMANY

[16] IMPERIAL COLL SCI TECHNOL & MED, DEPT PHYS, LONDON SW1 2BZ, ENGLAND

[17] UNIV INNSBRUCK, INST EXPTL PHYS, A-6020 INNSBRUCK, AUSTRIA

[18] UNIV LANCASTER, DEPT PHYS, LANCASTER LA1 4YB, ENGLAND

[19] UNIV MAINZ, INST PHYS, D-55099 MAINZ, GERMANY

[20] UNIV TRIESTE, DIPARTIMENTO FIS, I-34127 TRIESTE, ITALY

[21] INFN, I-34127 TRIESTE, ITALY

[22] UNIV WISCONSIN, DEPT PHYS, MADISON, WI 53706 USA

[23] UNIV WASHINGTON, SEATTLE, WA 98195 USA

[24] UNIV TORINO, IST FIS GEN, TURIN, ITALY

[25] CNR, IST COSMOGEOFIS, I-10133 TURIN, ITALY

[26] CERN, DIV PARTICLE PHYS EXPT, CH-1211 GENEVA 23, SWITZERLAND

[27] UNIV SASSARI, IST MATEMAT & FIS, SASSARI, ITALY

[28] UNIV BARCELONA, DEPT ESTRUCT & CONSTITUENS MAT, E-08208 BARCELONA, SPAIN

[29] FAC SCI LUMINY, CTR PHYS PARTICULES, IN2P3, CNRS, F-13288 MARSEILLE, FRANCE

[30] MAX PLANCK INST PHYS, WERNER HEISENBERG INST, D-80805 MUNCHEN, GERMANY

[31] UNIV PARIS SUD, LAB ACCELERATEUR LINEAIRE, IN2P3, CNRS, F-91405 ORSAY, FRANCE

[32] INFN SEZIONE PISA, SCUOLA NORMALE SUPERIORE, DIPARTIMENTO FIS UNIV, I-56010 PISA, ITALY

[33] UNIV LONDON, ROYAL HOLLOWAY BEDFORD NEW COLL, DEPT PHYS, SURREY TW20 OEX, ENGLAND

[34] RUTHERFORD APPLETON LAB, PARTICLE PHYS DEPT, DIDCOT OX11 OQX, OXON, ENGLAND

[35] CEA, SERV PHYS PARTICULES, DAPNIA, CE SACLAY, F-91191 GIF SUR YVETTE, FRANCE

[36] UNIV CALIF SANTA CRUZ, INST PARTICLE PHYS, SANTA CRUZ, CA 95064 USA

[37] UNIV SHEFFIELD, DEPT PHYS, SHEFFIELD S3 7RH, S YORKSHIRE, ENGLAND

[38] UNIV SIEGEN, FACHBERE PHYS, D-57068 SIEGEN, GERMANY

来源：

PHYSICS LETTERS B | 1994年 / 321卷 / 1-2期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(94)90345-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using data collected with the ALEPH detector at LEP correlations between the decay products of the tau(+) and tau- produced in the decay of the Z have been measured. The measurements performed in the decays tau --> pi nu and tau --> p nu place limits on deviations from the Standard Model. These are given by the parameter xi with xi = -1 for the Standard Model. The measured values are xi(pi) = -0.95 +/- 0.11 +/- 0.05 and xi(p) = -1.03 +/- 0.11 +/- 0.05. For models which predict xi(pi) = xi(p) = xi - interpreted as the average tau neutrino helicity - the measurement is xi = -0.99 +/- 0.07 +/- 0.04.

引用

页码：168 / 176

页数：9

共 15 条

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