Tau hadronic branching ratios

被引：43

作者：

Buskulic, D

Casper, D

DeBonis, I

Decamp, D

Ghez, P

Goy, C

Lees, JP

Lucotte, A

Minard, MN

Odier, P

Pietrzyk, B

Ariztizabal, F

Chmeissani, M

Crespo, JM

Efthymiopoulos, I

Fernandez, E

FernandezBosman, M

Gaitan, V

Garrido, L

Martinez, M

Orteu, S

Pacheco, A

Padilla, C

Palla, F

Pascual, A

Perlas, JA

Sanchez, F

Teubert, F

Colaleo, A

Creanza, D

dePalma, M

Farilla, A

Gelao, G

Girone, M

Iaselli, G

Maggi, G

Maggi, M

Marinelli, N

Natali, S

Nuzzo, S

Ranieri, A

Raso, G

Romano, F

Ruggieri, F

Selvaggi, G

Silvestris, L

Tempesta, P

Zito, G

Huang, X

Lin, J

机构：

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

[2] IST NAZL FIS NUCL, 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, PHYS CORPUSCULAIRE LAB, CNRS, IN2P3, F-63177 CLERMONT FERRAND, FRANCE

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

[7] DEMOCRITOS NUCL RES CTR, ATHENS, GREECE

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

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

[10] UNIV FLORENCE, IST NAZL FIS NUCL, DIPARTIMENTO FIS, I-50125 FLORENCE, ITALY

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

[12] IST NAZL FIS NUCL, NAZL FRASCATI LAB, I-00044 FRASCATI, ITALY

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

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

[15] UNIV LONDON IMPERIAL COLL SCI & TECHNOL, DEPT PHYS, LONDON SW7 2BZ, ENGLAND

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

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

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

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

[20] MAX PLANCK INST PHYS & ASTROPHYS, WERNER HEISENBERG INST PHYS, D-80805 MUNICH, GERMANY

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

[22] UNIV PISA, IST NAZL FIS NUCL, DIPARTIMENTO FIS, I-56010 PISA, ITALY

[23] SCUOLA NORMALE SUPER PISA, I-56010 PISA, ITALY

[24] UNIV LONDON, ROYAL HOLLOWAY & BEDFORD NEW COLL, DEPT PHYS, SURREY TW20 0EX, ENGLAND

[25] RUTHERFORD APPLETON LAB, DEPT PARTICLE PHYS, DIDCOT OX11 0QX, OXON, ENGLAND

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

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

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

[29] UNIV SIEGEN, FACHBEREICH PHYS, D-57068 SIEGEN, GERMANY

[30] UNIV TRIESTE, DIPARTMENTO FIS, I-34127 TRIESTE, ITALY

[31] IST NAZL FIS NUCL, I-34127 TRIESTE, ITALY

[32] UNIV WASHINGTON, SEATTLE, WA 98195 USA

[33] UNIV TURIN, IST FIS GEN, TURIN, ITALY

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

[35] UNIV BARCELONA, E-08208 BARCELONA, SPAIN

[36] KNANGNUNG NATL UNIV, KANGNUNG, SOUTH KOREA

[37] UNIV SASSARI, IST MATEMAT FIS, I-07100 SASSARI, ITALY

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1996年 / 70卷 / 04期

关键词：

D O I：

10.1007/s002880050134

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

From 64492 selected tau-pair events, produced at the Zeta(o) resonance, the measurement of the tau decays into hadrons from a global analysis using 1991, 1992 and 1993 ALEPH data is presented. Special emphasis is given to the reconstruction of photons and pi(o)'s, and the removal of fake photons. A detailed study of the systematics entering the pi(o) reconstruction is also given. A complete and consistent set of tau hadronic branching ratios is presented for 18 exclusive modes. Most measurements are more precise than the present world average. The new level of precision reached allows a stringent test of tau - mu universality in hadronic decays, g(tau)/g(mu) = 1.0013 +/- 0.0095, and the first measurement of the vector and axial-vector contributions to the non-strange hadronic tau decay width: R(tau,V) = 1.788 +/- 0.025 and R(tau,A) = 1.694 +/- 0.027. The ratio (R(tau,V) - R(tau,A))/(R(tau,V) + R(tau,A)), equal to (2.7 +/- 1.3) %, is a measure of the importance of QCD non-perturbative contributions to the hadronic tau decay width.

引用

页码：579 / 608

页数：30

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