Correlation measurements in Z→τ+τ- and the τ neutrino helicity

D. Buskulic; I. De Bonis; D. Decamp; P. Ghez; C. Goy; J. P. Lees; M. N. Minard; B. Pietrzyk; F. Ariztizabal; P. Comas; J. M. Crespo; M. Delfino; I. Efthymiopoulos; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll Garrido; T. Mattison; A. Pacheco; C. Padilla; A. Pascual; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; N. Marinelli; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Chai; H. Hu; D. Huang; X. Huang; J. Lin; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; L. Zhang; W. Zhao; G. Bonvicini; J. Boudreau; D. Casper; H. Drevermann; R. W. Forty; G. Ganis; C. Gay; M. Girone; R. Hagelberg; J. Harvey; J. Hilgart; R. Jacobsen; B. Jost; J. Knobloch; I. Lehraus; M. Maggi; C. Markou; M. Martinez; P. Mato; H. Meinhard; A. Minten; R. Miquel; H. G. Moser; P. Palazzi; J. R. Pater; J. A. Perlas; P. Perrodo; J. F. Pusztaszeri; F. Ranjard; L. Rolandi; J. Rothberg; T. Ruan; M. Saich; D. Schlatter; M. Schmelling; F. Sefkow; W. Tejessy; I. R. Tomalin; R. Veenhof; H. Wachsmuth; S. Wasserbaech; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Barres; C. Boyer; A. Falvard; P. Gay

doi:10.1016/0370-2693(94)90345-X

Correlation measurements in Z→τ⁺τ^- and the τ neutrino helicity

D. Buskulic, I. De Bonis, D. Decamp, P. Ghez, C. Goy, J. P. Lees, M. N. Minard, B. Pietrzyk, F. Ariztizabal, P. Comas, J. M. Crespo, M. Delfino, I. Efthymiopoulos, E. Fernandez, M. Fernandez-Bosman, V. Gaitan, Ll Garrido, T. Mattison, A. Pacheco, C. PadillaA. Pascual, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, N. Marinelli, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chai, H. Hu, D. Huang, X. Huang, J. Lin, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, L. Zhang, W. Zhao, G. Bonvicini, J. Boudreau, D. Casper, H. Drevermann, R. W. Forty, G. Ganis, C. Gay, M. Girone, R. Hagelberg, J. Harvey, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, I. Lehraus, M. Maggi, C. Markou, M. Martinez, P. Mato, H. Meinhard, A. Minten, R. Miquel, H. G. Moser, P. Palazzi, J. R. Pater, J. A. Perlas, P. Perrodo, J. F. Pusztaszeri, F. Ranjard, L. Rolandi, J. Rothberg, T. Ruan, M. Saich, D. Schlatter, M. Schmelling, F. Sefkow, W. Tejessy, I. R. Tomalin, R. Veenhof, H. Wachsmuth, S. Wasserbaech, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Barres, C. Boyer, A. Falvard, P. Gay

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Abstract

Using data collected with the ALEPH detector at LEP correlations between the decay products of the τ+ and τ- produced in the decay of the Z have been measured. The measurements performed in the decays τ→πν and τ→ρ{variant}ν place limits on deviations from the Standard Model. These are given by the parameter ζ with ζ = -1 for the Standard Model. The measured values are ζπ = -0.95 ± 0.11 ± 0.05 and ζρ{variant} = -1.03 ± 0.11 ± 0.05. For models which predict ζπ = ζρ{variant} = ζ - interpreted as the average τ neutrino helicity - the measurement is ζ = -0.99 ± 0.07 ± 0.04. © 1994.

Original language	English
Pages (from-to)	168-176
Journal	Physics Letters B
Volume	321
Issue number	1-2
DOIs	https://doi.org/10.1016/0370-2693(94)90345-X
Publication status	Published - 20 Jan 1994

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10.1016/0370-2693(94)90345-X

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Buskulic, D., De Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J. P., Minard, M. N., Pietrzyk, B., Ariztizabal, F., Comas, P., Crespo, J. M., Delfino, M., Efthymiopoulos, I., Fernandez, E., Fernandez-Bosman, M., Gaitan, V., Garrido, L., Mattison, T., Pacheco, A., ... Gay, P. (1994). Correlation measurements in Z→τ⁺τ^- and the τ neutrino helicity. Physics Letters B, 321(1-2), 168-176. https://doi.org/10.1016/0370-2693(94)90345-X

@article{0e1c277e45c64575b45e6b0063489c47,

title = "Correlation measurements in Z→τ+τ- and the τ neutrino helicity",

abstract = "Using data collected with the ALEPH detector at LEP correlations between the decay products of the τ+ and τ- produced in the decay of the Z have been measured. The measurements performed in the decays τ→πν and τ→ρ{variant}ν place limits on deviations from the Standard Model. These are given by the parameter ζ with ζ = -1 for the Standard Model. The measured values are ζπ = -0.95 ± 0.11 ± 0.05 and ζρ{variant} = -1.03 ± 0.11 ± 0.05. For models which predict ζπ = ζρ{variant} = ζ - interpreted as the average τ neutrino helicity - the measurement is ζ = -0.99 ± 0.07 ± 0.04. {\textcopyright} 1994.",

author = "D. Buskulic and {De Bonis}, I. and D. Decamp and P. Ghez and C. Goy and Lees, {J. P.} and Minard, {M. N.} and B. Pietrzyk and F. Ariztizabal and P. Comas and Crespo, {J. M.} and M. Delfino and I. Efthymiopoulos and E. Fernandez and M. Fernandez-Bosman and V. Gaitan and Ll Garrido and T. Mattison and A. Pacheco and C. Padilla and A. Pascual and D. Creanza and {de Palma}, M. and A. Farilla and G. Iaselli and G. Maggi and N. Marinelli and S. Natali and S. Nuzzo and A. Ranieri and G. Raso and F. Romano and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and G. Zito and Y. Chai and H. Hu and D. Huang and X. Huang and J. Lin and T. Wang and Y. Xie and D. Xu and R. Xu and J. Zhang and L. Zhang and W. Zhao and G. Bonvicini and J. Boudreau and D. Casper and H. Drevermann and Forty, {R. W.} and G. Ganis and C. Gay and M. Girone and R. Hagelberg and J. Harvey and J. Hilgart and R. Jacobsen and B. Jost and J. Knobloch and I. Lehraus and M. Maggi and C. Markou and M. Martinez and P. Mato and H. Meinhard and A. Minten and R. Miquel and Moser, {H. G.} and P. Palazzi and Pater, {J. R.} and Perlas, {J. A.} and P. Perrodo and Pusztaszeri, {J. F.} and F. Ranjard and L. Rolandi and J. Rothberg and T. Ruan and M. Saich and D. Schlatter and M. Schmelling and F. Sefkow and W. Tejessy and Tomalin, {I. R.} and R. Veenhof and H. Wachsmuth and S. Wasserbaech and W. Wiedenmann and T. Wildish and W. Witzeling and J. Wotschack and Z. Ajaltouni and M. Bardadin-Otwinowska and A. Barres and C. Boyer and A. Falvard and P. Gay",

year = "1994",

month = jan,

day = "20",

doi = "10.1016/0370-2693(94)90345-X",

language = "English",

volume = "321",

pages = "168--176",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-2",

}

Buskulic, D, De Bonis, I, Decamp, D, Ghez, P, Goy, C, Lees, JP, Minard, MN, Pietrzyk, B, Ariztizabal, F, Comas, P, Crespo, JM , Delfino, M, Efthymiopoulos, I, Fernandez, E, Fernandez-Bosman, M, Gaitan, V, Garrido, L, Mattison, T, Pacheco, A, Padilla, C, Pascual, A, Creanza, D, de Palma, M, Farilla, A, Iaselli, G, Maggi, G, Marinelli, N, Natali, S, Nuzzo, S, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Chai, Y, Hu, H, Huang, D, Huang, X, Lin, J, Wang, T, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhang, L, Zhao, W, Bonvicini, G, Boudreau, J, Casper, D, Drevermann, H, Forty, RW, Ganis, G, Gay, C, Girone, M, Hagelberg, R, Harvey, J, Hilgart, J, Jacobsen, R, Jost, B, Knobloch, J, Lehraus, I, Maggi, M, Markou, C, Martinez, M, Mato, P, Meinhard, H, Minten, A, Miquel, R, Moser, HG, Palazzi, P, Pater, JR, Perlas, JA, Perrodo, P, Pusztaszeri, JF, Ranjard, F, Rolandi, L, Rothberg, J, Ruan, T, Saich, M, Schlatter, D, Schmelling, M, Sefkow, F, Tejessy, W, Tomalin, IR, Veenhof, R, Wachsmuth, H, Wasserbaech, S, Wiedenmann, W, Wildish, T, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadin-Otwinowska, M, Barres, A, Boyer, C, Falvard, A & Gay, P 1994, 'Correlation measurements in Z→τ⁺τ^- and the τ neutrino helicity', Physics Letters B, vol. 321, no. 1-2, pp. 168-176. https://doi.org/10.1016/0370-2693(94)90345-X

TY - JOUR

T1 - Correlation measurements in Z→τ+τ- and the τ neutrino helicity

AU - Buskulic, D.

AU - De Bonis, I.

AU - Decamp, D.

AU - Ghez, P.

AU - Goy, C.

AU - Lees, J. P.

AU - Minard, M. N.

AU - Pietrzyk, B.

AU - Ariztizabal, F.

AU - Comas, P.

AU - Crespo, J. M.

AU - Delfino, M.

AU - Efthymiopoulos, I.

AU - Fernandez, E.

AU - Fernandez-Bosman, M.

AU - Gaitan, V.

AU - Garrido, Ll

AU - Mattison, T.

AU - Pacheco, A.

AU - Padilla, C.

AU - Pascual, A.

AU - Creanza, D.

AU - de Palma, M.

AU - Farilla, A.

AU - Iaselli, G.

AU - Maggi, G.

AU - Marinelli, N.

AU - Natali, S.

AU - Nuzzo, S.

AU - Ranieri, A.

AU - Raso, G.

AU - Romano, F.

AU - Ruggieri, F.

AU - Selvaggi, G.

AU - Silvestris, L.

AU - Tempesta, P.

AU - Zito, G.

AU - Chai, Y.

AU - Hu, H.

AU - Huang, D.

AU - Huang, X.

AU - Lin, J.

AU - Wang, T.

AU - Xie, Y.

AU - Xu, D.

AU - Xu, R.

AU - Zhang, J.

AU - Zhang, L.

AU - Zhao, W.

AU - Bonvicini, G.

AU - Boudreau, J.

AU - Casper, D.

AU - Drevermann, H.

AU - Forty, R. W.

AU - Ganis, G.

AU - Gay, C.

AU - Girone, M.

AU - Hagelberg, R.

AU - Harvey, J.

AU - Hilgart, J.

AU - Jacobsen, R.

AU - Jost, B.

AU - Knobloch, J.

AU - Lehraus, I.

AU - Maggi, M.

AU - Markou, C.

AU - Martinez, M.

AU - Mato, P.

AU - Meinhard, H.

AU - Minten, A.

AU - Miquel, R.

AU - Moser, H. G.

AU - Palazzi, P.

AU - Pater, J. R.

AU - Perlas, J. A.

AU - Perrodo, P.

AU - Pusztaszeri, J. F.

AU - Ranjard, F.

AU - Rolandi, L.

AU - Rothberg, J.

AU - Ruan, T.

AU - Saich, M.

AU - Schlatter, D.

AU - Schmelling, M.

AU - Sefkow, F.

AU - Tejessy, W.

AU - Tomalin, I. R.

AU - Veenhof, R.

AU - Wachsmuth, H.

AU - Wasserbaech, S.

AU - Wiedenmann, W.

AU - Wildish, T.

AU - Witzeling, W.

AU - Wotschack, J.

AU - Ajaltouni, Z.

AU - Bardadin-Otwinowska, M.

AU - Barres, A.

AU - Boyer, C.

AU - Falvard, A.

AU - Gay, P.

PY - 1994/1/20

Y1 - 1994/1/20

N2 - Using data collected with the ALEPH detector at LEP correlations between the decay products of the τ+ and τ- produced in the decay of the Z have been measured. The measurements performed in the decays τ→πν and τ→ρ{variant}ν place limits on deviations from the Standard Model. These are given by the parameter ζ with ζ = -1 for the Standard Model. The measured values are ζπ = -0.95 ± 0.11 ± 0.05 and ζρ{variant} = -1.03 ± 0.11 ± 0.05. For models which predict ζπ = ζρ{variant} = ζ - interpreted as the average τ neutrino helicity - the measurement is ζ = -0.99 ± 0.07 ± 0.04. © 1994.

AB - Using data collected with the ALEPH detector at LEP correlations between the decay products of the τ+ and τ- produced in the decay of the Z have been measured. The measurements performed in the decays τ→πν and τ→ρ{variant}ν place limits on deviations from the Standard Model. These are given by the parameter ζ with ζ = -1 for the Standard Model. The measured values are ζπ = -0.95 ± 0.11 ± 0.05 and ζρ{variant} = -1.03 ± 0.11 ± 0.05. For models which predict ζπ = ζρ{variant} = ζ - interpreted as the average τ neutrino helicity - the measurement is ζ = -0.99 ± 0.07 ± 0.04. © 1994.

U2 - 10.1016/0370-2693(94)90345-X

DO - 10.1016/0370-2693(94)90345-X

M3 - Article

SN - 0370-2693

VL - 321

SP - 168

EP - 176

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

Correlation measurements in Z→τ+τ- and the τ neutrino helicity

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Correlation measurements in Z→τ⁺τ^- and the τ neutrino helicity