Determination of the structure of τ decays in the reaction e+e- → τ+τ- → ϱ+vτϱ-v τ and a precision measurement of the τ-neutrino helicity

H. Albrecht; T. Hamacher; R. P. Hofmann; T. Kirchhoff; R. Mankel; A. Nau; S. Nowak; D. Reßing; H. Schröder; H. D. Schulz; M. Walter; R. Wurth; C. Hast; H. Kapitza; H. Kolanoski; A. Kosche; A. Lange; A. Lindner; M. Schieber; T. Siegmund; B. Spaan; H. Thurn; D. Töpfer; D. Wegener; P. Eckstein; M. Schmidtler; M. Schramm; K. R. Schubert; R. Schwierz; R. Waldi; K. Reim; H. Wegener; R. Eckmann; H. Kuipers; O. Mai; R. Mundt; T. Oest; R. Reiner; W. Schmidt-Parzefall; J. Stiewe; S. Werner; K. Ehret; W. Hofmann; A. Hüpper; K. T. Knöpfle; J. Spengler; P. Krieger; D. B. MacFarlane; J. D. Prentice; P. R.B. Saull; K. Tzamariudaki; R. G. Van de Water; T. S. Yoon; C. Frankl; M. Schneider; S. Weseler; G. Kernel; P. Križan; E. Križnič; T. Podobnik; T. Živko; V. Balagura; I. Belyaev; S. Chechelnitsky; M. Danilov; A. Droutskoy; Yu Gershtein; A. Golutvin; I. Korolko; G. Kostina; D. Litvintsev; V. Lubimov; P. Pakhlov; S. Semenov; A. Snizhko; I. Tichomirov; Yu Zaitsev

doi:10.1016/0370-2693(94)90992-X

Determination of the structure of τ decays in the reaction e+e- → τ+τ- → ϱ+vτϱ-v τ and a precision measurement of the τ-neutrino helicity

H. Albrecht
, T. Hamacher
, R. P. Hofmann
, T. Kirchhoff
, R. Mankel
, A. Nau
, S. Nowak
, D. Reßing
, H. Schröder
, H. D. Schulz
, M. Walter
, R. Wurth
, C. Hast
, H. Kapitza
, H. Kolanoski
, A. Kosche
, A. Lange
, A. Lindner
, M. Schieber
, T. Siegmund

B. Spaan, H. Thurn, D. Töpfer, D. Wegener, P. Eckstein, M. Schmidtler, M. Schramm, K. R. Schubert, R. Schwierz, R. Waldi, K. Reim, H. Wegener, R. Eckmann, H. Kuipers, O. Mai, R. Mundt, T. Oest, R. Reiner, W. Schmidt-Parzefall, J. Stiewe, S. Werner, K. Ehret, W. Hofmann, A. Hüpper, K. T. Knöpfle, J. Spengler, P. Krieger, D. B. MacFarlane, J. D. Prentice, P. R.B. Saull, K. Tzamariudaki, R. G. Van de Water, T. S. Yoon, C. Frankl, M. Schneider, S. Weseler, G. Kernel, P. Križan, E. Križnič, T. Podobnik, T. Živko, V. Balagura, I. Belyaev, S. Chechelnitsky, M. Danilov, A. Droutskoy, Yu Gershtein, A. Golutvin, I. Korolko, G. Kostina, D. Litvintsev, V. Lubimov, P. Pakhlov, S. Semenov, A. Snizhko, I. Tichomirov, Yu Zaitsev

c/o DESY
University of Dortmund
Technical University Dresden
Friedrich-Alexander University (FAU) Erlangen-Nürnberg and Universitätsklinikum Erlangen
Universität Hamburg
University of Heidelberg
Max-Planck-Institut für Kernphysik
Institute of Particle Physics
Universität Karlsruhe/Forschungszentrum Karlsruhe
University of Ljubljana
Institute for Theoretical and Experimental Physics

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

Résumé

Using the ARGUS detector at the DORIS II storage ring we have investigated the Lorentz structure of the electroweak interaction in semi-hadronic τ decays. Spin correlations in the process e⁺e^- → τ⁺τ^- → v_τπ⁺ π⁰ v_τπ^-π⁰ are exploited for a measurement of the normalized product of the vector (g_V) and axial vector (g_A) couplings of the τ lepton, γinAV = 2 Re{g_Ag_V^*} (|g_V|²). The correlations are sensitive to the product of the couplings in both τ decays: γ_AV² = γ_AV(τ^- → ν_τW^-) _AV = -h(v_τ)h(v_τ). The measured value, γ_AV² = 1.044±0.057±0.060, determines the relative sign of the neutrino helicities. Assuming CP invariance, the absolute value |γ_AV| = 1.022±0.028±0.030 was found to be incellent agreement with the Standard Model. The contribution of scalar (g_s) or pseudoscalar (g_P) couplings was also investigated. No evidence for a scalar-like coupling was found.

langue originale	Anglais
Pages (de - à)	383-392
Nombre de pages	10
journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	337
Numéro de publication	3-4
Les DOIs	https://doi.org/10.1016/0370-2693(94)90992-X
état	Publié - 13 oct. 1994
Modification externe	Oui

Accès au document

10.1016/0370-2693(94)90992-X

Contient cette citation

Albrecht, H., Hamacher, T., Hofmann, R. P., Kirchhoff, T., Mankel, R., Nau, A., Nowak, S., Reßing, D., Schröder, H., Schulz, H. D., Walter, M., Wurth, R., Hast, C., Kapitza, H., Kolanoski, H., Kosche, A., Lange, A., Lindner, A., Schieber, M., ... Zaitsev, Y. (1994). Determination of the structure of τ decays in the reaction e+e- → τ+τ- → ϱ+vτϱ-v τ and a precision measurement of the τ-neutrino helicity. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 337(3-4), 383-392. https://doi.org/10.1016/0370-2693(94)90992-X

@article{70d2b9c98ab147a8a8fa69a25b75fe17,

title = "Determination of the structure of τ decays in the reaction e+e- → τ+τ- → ϱ+vτϱ-v τ and a precision measurement of the τ-neutrino helicity",

abstract = "Using the ARGUS detector at the DORIS II storage ring we have investigated the Lorentz structure of the electroweak interaction in semi-hadronic τ decays. Spin correlations in the process e+e- → τ+τ- → vτπ+ π0 vτπ-π0 are exploited for a measurement of the normalized product of the vector (gV) and axial vector (gA) couplings of the τ lepton, γinAV = 2 Re\{gAgV*\} (|gV|2). The correlations are sensitive to the product of the couplings in both τ decays: γAV2 = γAV(τ- → ντW-) AV = -h(vτ)h(vτ). The measured value, γAV2 = 1.044±0.057±0.060, determines the relative sign of the neutrino helicities. Assuming CP invariance, the absolute value |γAV| = 1.022±0.028±0.030 was found to be incellent agreement with the Standard Model. The contribution of scalar (gs) or pseudoscalar (gP) couplings was also investigated. No evidence for a scalar-like coupling was found.",

author = "H. Albrecht and T. Hamacher and Hofmann, \{R. P.\} and T. Kirchhoff and R. Mankel and A. Nau and S. Nowak and D. Re{\ss}ing and H. Schr{\"o}der and Schulz, \{H. D.\} and M. Walter and R. Wurth and C. Hast and H. Kapitza and H. Kolanoski and A. Kosche and A. Lange and A. Lindner and M. Schieber and T. Siegmund and B. Spaan and H. Thurn and D. T{\"o}pfer and D. Wegener and P. Eckstein and M. Schmidtler and M. Schramm and Schubert, \{K. R.\} and R. Schwierz and R. Waldi and K. Reim and H. Wegener and R. Eckmann and H. Kuipers and O. Mai and R. Mundt and T. Oest and R. Reiner and W. Schmidt-Parzefall and J. Stiewe and S. Werner and K. Ehret and W. Hofmann and A. H{\"u}pper and Kn{\"o}pfle, \{K. T.\} and J. Spengler and P. Krieger and MacFarlane, \{D. B.\} and Prentice, \{J. D.\} and Saull, \{P. R.B.\} and K. Tzamariudaki and \{Van de Water\}, \{R. G.\} and Yoon, \{T. S.\} and C. Frankl and M. Schneider and S. Weseler and G. Kernel and P. Kri{\v z}an and E. Kri{\v z}ni{\v c} and T. Podobnik and T. {\v Z}ivko and V. Balagura and I. Belyaev and S. Chechelnitsky and M. Danilov and A. Droutskoy and Yu Gershtein and A. Golutvin and I. Korolko and G. Kostina and D. Litvintsev and V. Lubimov and P. Pakhlov and S. Semenov and A. Snizhko and I. Tichomirov and Yu Zaitsev",

year = "1994",

month = oct,

day = "13",

doi = "10.1016/0370-2693(94)90992-X",

language = "English",

volume = "337",

pages = "383--392",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

number = "3-4",

}

Albrecht, H, Hamacher, T, Hofmann, RP, Kirchhoff, T, Mankel, R, Nau, A, Nowak, S, Reßing, D, Schröder, H, Schulz, HD, Walter, M, Wurth, R, Hast, C, Kapitza, H, Kolanoski, H, Kosche, A, Lange, A, Lindner, A, Schieber, M, Siegmund, T, Spaan, B, Thurn, H, Töpfer, D, Wegener, D, Eckstein, P, Schmidtler, M, Schramm, M, Schubert, KR, Schwierz, R, Waldi, R, Reim, K, Wegener, H, Eckmann, R, Kuipers, H, Mai, O, Mundt, R, Oest, T, Reiner, R, Schmidt-Parzefall, W, Stiewe, J, Werner, S, Ehret, K, Hofmann, W, Hüpper, A, Knöpfle, KT, Spengler, J, Krieger, P, MacFarlane, DB, Prentice, JD, Saull, PRB, Tzamariudaki, K, Van de Water, RG, Yoon, TS, Frankl, C, Schneider, M, Weseler, S, Kernel, G, Križan, P, Križnič, E, Podobnik, T, Živko, T, Balagura, V, Belyaev, I, Chechelnitsky, S, Danilov, M, Droutskoy, A, Gershtein, Y, Golutvin, A, Korolko, I, Kostina, G, Litvintsev, D, Lubimov, V, Pakhlov, P, Semenov, S, Snizhko, A, Tichomirov, I & Zaitsev, Y 1994, 'Determination of the structure of τ decays in the reaction e+e- → τ+τ- → ϱ+vτϱ-v τ and a precision measurement of the τ-neutrino helicity', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, VOL. 337, Numéro 3-4, p. 383-392. https://doi.org/10.1016/0370-2693(94)90992-X

Determination of the structure of τ decays in the reaction e+e- → τ+τ- → ϱ+vτϱ-v τ and a precision measurement of the τ-neutrino helicity. / Albrecht, H.; Hamacher, T.; Hofmann, R. P. et al.
Dans: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol 337, Numéro 3-4, 13.10.1994, p. 383-392.

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

TY - JOUR

T1 - Determination of the structure of τ decays in the reaction e+e- → τ+τ- → ϱ+vτϱ-v τ and a precision measurement of the τ-neutrino helicity

AU - Albrecht, H.

AU - Hamacher, T.

AU - Hofmann, R. P.

AU - Kirchhoff, T.

AU - Mankel, R.

AU - Nau, A.

AU - Nowak, S.

AU - Reßing, D.

AU - Schröder, H.

AU - Schulz, H. D.

AU - Walter, M.

AU - Wurth, R.

AU - Hast, C.

AU - Kapitza, H.

AU - Kolanoski, H.

AU - Kosche, A.

AU - Lange, A.

AU - Lindner, A.

AU - Schieber, M.

AU - Siegmund, T.

AU - Spaan, B.

AU - Thurn, H.

AU - Töpfer, D.

AU - Wegener, D.

AU - Eckstein, P.

AU - Schmidtler, M.

AU - Schramm, M.

AU - Schubert, K. R.

AU - Schwierz, R.

AU - Waldi, R.

AU - Reim, K.

AU - Wegener, H.

AU - Eckmann, R.

AU - Kuipers, H.

AU - Mai, O.

AU - Mundt, R.

AU - Oest, T.

AU - Reiner, R.

AU - Schmidt-Parzefall, W.

AU - Stiewe, J.

AU - Werner, S.

AU - Ehret, K.

AU - Hofmann, W.

AU - Hüpper, A.

AU - Knöpfle, K. T.

AU - Spengler, J.

AU - Krieger, P.

AU - MacFarlane, D. B.

AU - Prentice, J. D.

AU - Saull, P. R.B.

AU - Tzamariudaki, K.

AU - Van de Water, R. G.

AU - Yoon, T. S.

AU - Frankl, C.

AU - Schneider, M.

AU - Weseler, S.

AU - Kernel, G.

AU - Križan, P.

AU - Križnič, E.

AU - Podobnik, T.

AU - Živko, T.

AU - Balagura, V.

AU - Belyaev, I.

AU - Chechelnitsky, S.

AU - Danilov, M.

AU - Droutskoy, A.

AU - Gershtein, Yu

AU - Golutvin, A.

AU - Korolko, I.

AU - Kostina, G.

AU - Litvintsev, D.

AU - Lubimov, V.

AU - Pakhlov, P.

AU - Semenov, S.

AU - Snizhko, A.

AU - Tichomirov, I.

AU - Zaitsev, Yu

PY - 1994/10/13

Y1 - 1994/10/13

N2 - Using the ARGUS detector at the DORIS II storage ring we have investigated the Lorentz structure of the electroweak interaction in semi-hadronic τ decays. Spin correlations in the process e+e- → τ+τ- → vτπ+ π0 vτπ-π0 are exploited for a measurement of the normalized product of the vector (gV) and axial vector (gA) couplings of the τ lepton, γinAV = 2 Re{gAgV*} (|gV|2). The correlations are sensitive to the product of the couplings in both τ decays: γAV2 = γAV(τ- → ντW-) AV = -h(vτ)h(vτ). The measured value, γAV2 = 1.044±0.057±0.060, determines the relative sign of the neutrino helicities. Assuming CP invariance, the absolute value |γAV| = 1.022±0.028±0.030 was found to be incellent agreement with the Standard Model. The contribution of scalar (gs) or pseudoscalar (gP) couplings was also investigated. No evidence for a scalar-like coupling was found.

AB - Using the ARGUS detector at the DORIS II storage ring we have investigated the Lorentz structure of the electroweak interaction in semi-hadronic τ decays. Spin correlations in the process e+e- → τ+τ- → vτπ+ π0 vτπ-π0 are exploited for a measurement of the normalized product of the vector (gV) and axial vector (gA) couplings of the τ lepton, γinAV = 2 Re{gAgV*} (|gV|2). The correlations are sensitive to the product of the couplings in both τ decays: γAV2 = γAV(τ- → ντW-) AV = -h(vτ)h(vτ). The measured value, γAV2 = 1.044±0.057±0.060, determines the relative sign of the neutrino helicities. Assuming CP invariance, the absolute value |γAV| = 1.022±0.028±0.030 was found to be incellent agreement with the Standard Model. The contribution of scalar (gs) or pseudoscalar (gP) couplings was also investigated. No evidence for a scalar-like coupling was found.

U2 - 10.1016/0370-2693(94)90992-X

DO - 10.1016/0370-2693(94)90992-X

M3 - Article

AN - SCOPUS:0000374138

SN - 0370-2693

VL - 337

SP - 383

EP - 392

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -

Determination of the structure of τ decays in the reaction e+e- → τ+τ- → ϱ+vτϱ-v τ and a precision measurement of the τ-neutrino helicity

Résumé

Accès au document

Empreinte digitale

Contient cette citation