Published June 1992
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Measurement of the decay τ-→ρ-ντ
Creators
- Albrecht, H.1
- Ehrlichmann, H.1
- Hamacher, T.1
- Hofmann, R.P.1
- Kirchhoff, T.1
- Nau, A.1
- Nowak, S.1
- Schroeder, H.1
- Schulz, H.D.1
- Walter, M.1
- Wurth, R.1
- Appuhn, R.D.2
- Hast, C.2
- Kolanoski, H.2
- Lange, A.2
- Lindner, A.2
- Mankel, R.2
- Schieber, M.2
- Siegmund, T.2
- Spaan, B.2
- Thurn, H.2
- Toepfer, D.2
- Walther, A.2
- Wegener, D.2
- Paulini, M.3
- Reim, K.3
- Wegener, H.3
- Mundt, R.4
- Oest, T.4
- Reiner, R.4
- Schmidt-Parzefall, W.4
- Funk, W.5
- Stiewe, J.5
- Werner, S.5
- Ehret, K.6
- Hofmann, W.6
- Huepper, A.6
- Khan, S.6
- Knoepfle, K.T.6
- Spengler, J.6
- Britton, D.I.7
- Charlesworth, C.E.K.7
- Edwards, K.W.7
- Hyatt, E.R.F.7
- Kapitza, H.7
- Krieger, P.7
- MacFarlane, D.B.7
- Patel, P.M.7
- Prentice, J.D.7
- Saull, P.R.B.7
- Tzamariudaki, K.7
- Van de Water, R.G.7
- Yoon, T.S.7
- Ressling, D.8
- Schmidtler, M.8
- Schneider, M.8
- Schubert, K.R.8
- Strahl, K.8
- Waldi, R.8
- Weseler, S.8
- Kernel, G.9, 10
- Krizan, P.9, 10
- Kriznic, E.9, 10
- Podobnik, T.9, 10
- Zivko, T.9, 10
- Cronstroem, H.I.11
- Joensson, L.11
- Balagura, V.12
- Belyaev, I.12
- Danilov, M.12
- Droutskoy, A.12
- Golutvin, A.12
- Gorelov, I.12
- Kostina, G.12
- Lubimov, V.12
- Murat, P.12
- Pakhlov, P.12
- Ratnikov, F.12
- Semenov, S.12
- Shibaev, V.12
- Soloshenko, V.12
- Tichomirov, I.12
- Zaitsev, Yu.12
- ARGUS Collaboration
- 1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- 2. Dortmund Univ. (Germany). Inst. fuer Physik
- 3. Erlangen-Nuernberg Univ., Erlangen (Germany). Physikalisches Inst.
- 4. Hamburg Univ. (Germany). 2. Inst. fuer Experimentalphysik
- 5. Heidelberg Univ. (Germany). Inst. fuer Hochenergiephysik
- 6. Max-Planck-Inst. fuer Kernphysik, Heidelberg (Germany)
- 7. Inst. of Particle Physics (Canada)
- 8. Karlsruhe Univ. (Germany). Inst. fuer Experimentelle Kernphysik
- 9. Ljubljana Univ. (Slovenia). Oddelek za Fiziko
- 10. Inst. J. Stefan, Ljubljana (Slovenia)
- 11. Lund Univ. (Sweden). Inst. of Physics
- 12. Inst. of Theoretical and Experimental Physics, Moscow (Russia)
Description
An analysis of the decay τ-→π-πOντ has been performed using the ARGUS detector at the DORIS II storage ring. The branching ratio has been determined to be Br(π-→π-π0ντ) = (22.6±0.4±0.9)%. The spape of the π-π0 invariant mass spectrum is found to be in good agreement with the predictions obtained using the conserved vector current (CVC) hypothesis, suggesting that the π-π0 system is produced in a JP = 1- state. An analysis of the measured decay angular distribution of the pions with respect to the flight direction of the π-π0 system demonstrates the vector nature of the coupling at the τvτ vertex. With the assumption of zero ντ mass the ντ spin has been shown to be Jντ = 1/2. (orig.)
Availability note (English)
MF available from INIS under the Report Number.
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Additional details
Publishing Information
- Imprint Pagination
- 16 p.
- Report number
- DESY--92-082
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 24008595
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANGULAR CORRELATION; ANGULAR DISTRIBUTION; ANNIHILATION; BRANCHING RATIO; EFFECTIVE MASS; ELECTRON-POSITRON INTERACTIONS; EXPERIMENTAL DATA; HADRONIC PARTICLE DECAY; MASS SPECTRA; PAIR PRODUCTION; PIONS MINUS; PIONS NEUTRAL; POLARIZATION-ASYMMETRY RATIO; POLARIZED PRODUCTS; RHO-770 MESONS; SEMILEPTONIC DECAY; SPIN; TAU NEUTRINOS; TAU PARTICLES
- Descriptors DEC
- ANGULAR MOMENTUM; BOSONS; CORRELATIONS; DATA; DECAY; DISTRIBUTION; ELEMENTARY PARTICLES; FERMIONS; HADRONS; HEAVY LEPTONS; INFORMATION; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTONS; MASS; MASSLESS PARTICLES; MESONS; NEUTRINOS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PARTICLE PROPERTIES; PIONS; PSEUDOSCALAR MESONS; SPECTRA; VECTOR MESONS; WEAK PARTICLE DECAY
Optional Information
- Contract/Grant/Project number
- Contract BMFT 054DO51P; BMFT 054ER12P; BMFT 055HD21P; BMFT 054KA17P
- Collaborations
- ARGUS Collaboration.