A study of the hadronic resonance structure in the decay τ→3πντ

被引：32

作者：

Abreu, P

Adam, W

Adye, T

Adzic, P

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

Barbiellini, G

Barbier, R

Bardin, DY

Barker, G

Baroncelli, A

Barring, O

Bates, MJ

Battaglia, M

Baubillier, M

Becks, KH

Begalli, M

Beilliere, P

Belokopytov, Y

Belous, K

Benvenuti, AC

Berat, C

Berggren, M

Bertini, D

Bertrand, D

Besancon, M

Bianchi, F

Bigi, M

Bilenky, MS

Bizouard, MA

Bloch, D

Bonesini, M

Bonivento, W

Boonekamp, M

Booth, PSL

机构：

[1] FCUL, IST, LIP, PT-1000 Lisboa, Portugal

[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

[3] VUB, ULB, IIHE, BE-1050 Brussels, Belgium

[4] Univ Etat Mons, Fac Sci, BE-7000 Mons, Belgium

[5] Univ Athens, Phys Lab, GR-10680 Athens, Greece

[6] Univ Bergen, Dept Phys, NO-5007 Bergen, Norway

[7] Univ Bologna, Dipartimento Fis, IT-40126 Bologna, Italy

[8] INFN, IT-40126 Bologna, Italy

[9] Ctr Brasileiro Pesquisas Fis, BR-22290 Rio De Janeiro, Brazil

[10] Pontificia Univ Catolica Rio de Janeiro, Dept Fis, BR-22453 Rio De Janeiro, Brazil

[11] Univ Estadual Rio de Janeiro, Inst Fis, Rio De Janeiro, Brazil

[12] Comenius Univ, Fac Math & Phys, SK-84215 Bratislava, Slovakia

[13] Coll France, Phys Corpusculaire Lab, IN2P3, CNRS, FR-75231 Paris 05, France

[14] CERN, CH-1211 Geneva 23, Switzerland

[15] ULP, CNRS, IN2P3, Inst Rech Subatom, FR-67037 Strasbourg, France

[16] NCSR Demokritos, Inst Nucl Phys, GR-15310 Athens, Greece

[17] CAS, Div High Energy Phys, FZU, Inst Phys, CZ-18040 Prague 8, Czech Republic

[18] Univ Genova, Dipartimento Fis, IT-16146 Genova, Italy

[19] INFN, IT-16146 Genova, Italy

[20] Univ Grenoble 1, IN2P3, CNRS, Inst Sci Nucl, FR-38026 Grenoble, France

[21] Helsinki Inst Phys, HIP, FI-00014 Helsinki, Finland

[22] Joint Inst Nucl Res, RU-101000 Moscow, Russia

[23] Univ Karlsruhe, Inst Expt Kernphys, DE-76128 Karlsruhe, Germany

[24] Inst Nucl Phys, PL-30055 Krakow, Poland

[25] Univ Min & Met, PL-30055 Krakow, Poland

[26] Univ Paris Sud, Lab Accelerateur Lineaire, IN2P3, CNRS, FR-91405 Orsay, France

[27] Univ Lancaster, Sch Phys & Chem, Lancaster LA1 4YB, England

[28] Univ Liverpool, Dept Phys, Liverpool L69 3BX, Merseyside, England

[29] Univ Paris 06, LPNHE, IN2P3, CNRS, Paris 05, France

[30] Univ Paris 07, Paris 05, France

[31] Univ Lund, Dept Phys, SE-22363 Lund, Sweden

[32] Univ Claude Bernard, IPNL, IN2P3, CNRS, FR-69622 Villeurbanne, France

[33] Univ Aix Marseille 2, CPP, IN2P3, CNRS, FR-13288 Marseille 09, France

[34] Univ Milano, Dipartimento Fis, IT-20133 Milan, Italy

[35] INFN, IT-20133 Milan, Italy

[36] Niels Bohr Inst, DK-2100 Copenhagen O, Denmark

[37] Charles Univ, NC, Nucl Ctr MFF, Areal MFF, CZ-18000 Praha 8, Czech Republic

[38] NIKHEF, NL-1009 DB Amsterdam, Netherlands

[39] Natl Tech Univ Athens, Dept Phys, GR-15773 Athens, Greece

[40] Univ Oslo, Dept Phys, NO-1000 Oslo 3, Norway

[41] Univ Oviedo, Dpto Fis, ES-33007 Oviedo, Spain

[42] Univ Oxford, Dept Phys, Oxford OX1 3RH, England

[43] Univ Padova, Dipartimento Fis, IT-35131 Padua, Italy

[44] INFN, IT-35131 Padua, Italy

[45] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

[46] Univ Rome 2, Dipartimento Fis, IT-00173 Rome, Italy

[47] INFN, IT-00173 Rome, Italy

[48] CEA Saclay, DAPNIA, Serv Phys Particules, FR-91191 Gif Sur Yvette, France

[49] Ist Nazl Fis Nucl, Ist Super Sanita, IT-00161 Rome, Italy

[50] UC, CSIC, Inst Fis Cantabria, ES-39006 Santander, Spain

来源：

PHYSICS LETTERS B | 1998年 / 426卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(98)00347-5

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The hadronic structure of the decay of the tau lepton to three charged particles, tau --> 3 pi nu(tau), is studied using data collected by the DELPHI detector at LEP between 1992 and 1995. The invariant mass of the 3 pi system, m(3 pi), is fitted using the models of Kuhn and Santamaria, Isgur Morningstar and Reader, and Feindt. The 3 pi and pi(+)pi(-) mass spectra are compared with each model. Below m(3 pi)(2) = 2.3 GeV2, all are in good qualitative agreement. Above m(3 pi)(2) = 2.3 GeV2, anomalous behaviour is observed, consistent with the existence of a hitherto unseen decay mode of the tau through a radial excitation of the alpha(1) meson. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：411 / 427

页数：17

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