Measurement of the spectral functions of vector current hadronic tau decays

被引：178

作者：

Barate, R

Buskulic, D

Decamp, D

Ghez, P

Goy, C

Lees, JP

Lucotte, A

Minard, MN

Nief, JY

Pietrzyk, B

Casado, MP

Chmeissani, M

Comas, P

Crespo, JM

Delfino, M

Fernandez, E

FernandezBosman, M

Garrido, L

Juste, A

Martinez, M

Miquel, R

Mir, LM

Orteu, S

Padilla, C

Park, IC

Pascual, A

Perlas, JA

Riu, I

Sanchez, F

Teubert, F

Colaleo, A

Creanza, D

dePalma, M

Gelao, G

Iaselii, G

Maggi, G

Maggi, M

Marinelli, N

Nuzzo, S

Ranieri, A

Raso, G

Ruggieri, F

Selvaggi, G

Silvestris, L

Tempesta, P

Tricomi, A

Zito, G

Huang, X

Lin, J

Ouyang, Q

机构：

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

[2] IST NAZL FIS NUCL, SEZ BARI, 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 AUBIERE, FRANCE

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

[7] DEMOCRITOS NUCL RES CTR, ATHENS, GREECE

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

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

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

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

[12] IST NAZL FIS NUCL, LAB NAZL FRASCATI, 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 & MED, DEPT PHYS, LONDON SW7 2BZ, ENGLAND

[16] UNIV INNSBRUCK, INST EXPT 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, IN2P3, CNRS, F-13288 MARSEILLE, FRANCE

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

[21] IST NAZL FIS NUCL, SEZ MILANO, I-20133 MILAN, ITALY

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

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

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

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

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

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

[28] CTR ETUD SACLAY, CEA, DAPNIA, SERV PHYS PARTICULES, F-91191 GIF SUR YVETTE, FRANCE

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

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

[31] UNIV GESAMTHSCH SIEGEN, FACHBEREICH PHYS, D-57068 SIEGEN, GERMANY

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

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

[34] UNIV WASHINGTON, SEATTLE, WA 98195 USA

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

[36] IST NAZL FIS NUCL, DIPARTIMENTO FIS, SEZ CATANIA, I-95129 CATANIA, ITALY

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

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

[39] UNIV BARCELONA, BARCELONA 08208, SPAIN

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

[41] SUNGKYUNKWAN UNIV, SUWON 440746, SOUTH KOREA

[42] KANGNUNG NATL UNIV, KANGNUNG, SOUTH KOREA

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1997年 / 76卷 / 01期

基金：

中国国家自然科学基金; 奥地利科学基金会;

关键词：

D O I：

10.1007/s002880050523

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：

A measurement of the spectral functions of non-strange tau vector current final states is presented, using 124 358 tau pairs recorded by the ALEPH detector at LEP during the years 1991 to 1994. The spectral functions of the dominant two-and four-pion tau decay channels are compared to published results of ece-annihilation experiments via isospin rotation. A combined fit of the pion form factor from tau decays and e(+)e(-)data is performed using different parameaizations. The mass and the width of the rho(+/-)(770) and the p(0)(770) are separately determined in order to extract possible isospin violating effects. The mass and width differences are measured to be M<rho+/-(770) - M-rho 0(770), = (0.0 +/- 1.0) MeV/c(2) and Gamma(rho+/-(770)) - Gamma(rho 0(770)) = (0.1 +/- 1.9) MeV/c(2).

引用

页码：15 / 33

页数：19

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