Improved tau polarisation measurement

D. Buskulic; D. Casper; I. De Bonis; D. Decamp; P. Ghez; C. Goy; J. P. Lees; M. N. Minard; P. Odier; B. Pietrzyk; F. Ariztizabal; M. Chmeissani; J. M. Crespo; I. Efthymiopoulos; E. Fernandez; M. Fernandez-Bosman; V. Gaitan; Ll Garrido; M. Martinez; S. Orteu; A. Pacheco; C. Padilla; F. Palla; A. Pascual; J. A. Perlas; F. Sanchez; F. Teubert; 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; X. Huang; J. Lin; Q. Ouyang; T. Wang; Y. Xie; R. Xu; S. Xue; J. Zhang; L. Zhang; W. Zhao; G. Bonvicini; M. Cattaneo; P. Comas; P. Coyle; H. Drevermann; A. Engelhardt; R. W. Forty; M. Frank; M. Girone; R. Hagelberg; J. Harvey; R. Jacobsen; P. Janot; B. Jost; J. Knobloch; I. Lehraus; M. Maggi; C. Markou; E. B. Martin; P. Mato; H. Meinhard; A. Minten; R. Miquel; T. Oest; P. Palazzi; J. R. Pater; P. Perrodo; J. F. Pusztaszeri; F. Ranjard; P. Rensing; L. Rolandi; D. Schlatter; M. Schmelling; O. Schneider; W. Tejessy; I. R. Tomalin; A. Venturi; H. Wachsmuth; W. Wiedenmann; T. Wildish; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Barres; C. Boyer; A. Falvard

doi:10.1007/BF02907399

Improved tau polarisation measurement

D. Buskulic, D. Casper, I. De Bonis, D. Decamp, P. Ghez, C. Goy, J. P. Lees, M. N. Minard, P. Odier, B. Pietrzyk, F. Ariztizabal, M. Chmeissani, J. M. Crespo, I. Efthymiopoulos, E. Fernandez, M. Fernandez-Bosman, V. Gaitan, Ll Garrido, M. Martinez, S. OrteuA. Pacheco, C. Padilla, F. Palla, A. Pascual, J. A. Perlas, F. Sanchez, F. Teubert, 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, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, G. Bonvicini, M. Cattaneo, P. Comas, P. Coyle, H. Drevermann, A. Engelhardt, R. W. Forty, M. Frank, M. Girone, R. Hagelberg, J. Harvey, R. Jacobsen, P. Janot, B. Jost, J. Knobloch, I. Lehraus, M. Maggi, C. Markou, E. B. Martin, P. Mato, H. Meinhard, A. Minten, R. Miquel, T. Oest, P. Palazzi, J. R. Pater, P. Perrodo, J. F. Pusztaszeri, F. Ranjard, P. Rensing, L. Rolandi, D. Schlatter, M. Schmelling, O. Schneider, W. Tejessy, I. R. Tomalin, A. Venturi, H. Wachsmuth, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Barres, C. Boyer, A. Falvard

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Resum

Using 22 pb-1 of data collected at LEP in 1992 on the peak of the Z resonance, the ALEPH collaboration has measured the polarisation of the tau leptons decaying into {Mathematical expression}, πν, ρν and a1 ν from their individual decay product distributions. The measurement of the tau polarisation as a function of the production polar angle yields the two parameters N τ and N e, where, in terms of the axial and vector couplings g Al and g Vl, N l=2 g Vl gAl/(g Vl 2 +g Al 2 ). This analysis follows to a large extent the methods devised for the 1990 and 1991 data but with improvements which bring a better understanding of the systematic uncertainties. Combining the 1992 measurements with our previously published results yields N τ=0.136±0.012±0.009 and N e=0.129±0.016±0.005. Assuming e-τ universality, the measurements imply an effective weak mixing angle of sin 2 θ W eff =0.2332±0.0014. © 1996 Springer-Verlag.

Idioma original	Anglès
Pàgines (de-a)	183-193
Revista	Zeitschrift fur Physik C-Particles and Fields
Volum	69
Número	1
DOIs	https://doi.org/10.1007/BF02907399
Estat de la publicació	Publicada - 1 de gen. 1995

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10.1007/BF02907399

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Buskulic, D., Casper, D., De Bonis, I., Decamp, D., Ghez, P., Goy, C., Lees, J. P., Minard, M. N., Odier, P., Pietrzyk, B., Ariztizabal, F., Chmeissani, M., Crespo, J. M., Efthymiopoulos, I., Fernandez, E., Fernandez-Bosman, M., Gaitan, V., Garrido, L., Martinez, M., ... Falvard, A. (1995). Improved tau polarisation measurement. Zeitschrift fur Physik C-Particles and Fields, 69(1), 183-193. https://doi.org/10.1007/BF02907399

@article{d2949c40b0464b42930ab3f79d74641c,

title = "Improved tau polarisation measurement",

abstract = "Using 22 pb-1 of data collected at LEP in 1992 on the peak of the Z resonance, the ALEPH collaboration has measured the polarisation of the tau leptons decaying into {Mathematical expression}, πν, ρν and a1 ν from their individual decay product distributions. The measurement of the tau polarisation as a function of the production polar angle yields the two parameters N τ and N e, where, in terms of the axial and vector couplings g Al and g Vl, N l=2 g Vl gAl/(g Vl 2 +g Al 2 ). This analysis follows to a large extent the methods devised for the 1990 and 1991 data but with improvements which bring a better understanding of the systematic uncertainties. Combining the 1992 measurements with our previously published results yields N τ=0.136±0.012±0.009 and N e=0.129±0.016±0.005. Assuming e-τ universality, the measurements imply an effective weak mixing angle of sin 2 θ W eff =0.2332±0.0014. {\textcopyright} 1996 Springer-Verlag.",

author = "D. Buskulic and D. Casper and {De Bonis}, I. and D. Decamp and P. Ghez and C. Goy and Lees, {J. P.} and Minard, {M. N.} and P. Odier and B. Pietrzyk and F. Ariztizabal and M. Chmeissani and Crespo, {J. M.} and I. Efthymiopoulos and E. Fernandez and M. Fernandez-Bosman and V. Gaitan and Ll Garrido and M. Martinez and S. Orteu and A. Pacheco and C. Padilla and F. Palla and A. Pascual and Perlas, {J. A.} and F. Sanchez and F. Teubert 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 X. Huang and J. Lin and Q. Ouyang and T. Wang and Y. Xie and R. Xu and S. Xue and J. Zhang and L. Zhang and W. Zhao and G. Bonvicini and M. Cattaneo and P. Comas and P. Coyle and H. Drevermann and A. Engelhardt and Forty, {R. W.} and M. Frank and M. Girone and R. Hagelberg and J. Harvey and R. Jacobsen and P. Janot and B. Jost and J. Knobloch and I. Lehraus and M. Maggi and C. Markou and Martin, {E. B.} and P. Mato and H. Meinhard and A. Minten and R. Miquel and T. Oest and P. Palazzi and Pater, {J. R.} and P. Perrodo and Pusztaszeri, {J. F.} and F. Ranjard and P. Rensing and L. Rolandi and D. Schlatter and M. Schmelling and O. Schneider and W. Tejessy and Tomalin, {I. R.} and A. Venturi and H. Wachsmuth 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",

year = "1995",

month = jan,

day = "1",

doi = "10.1007/BF02907399",

language = "English",

volume = "69",

pages = "183--193",

number = "1",

}

Buskulic, D, Casper, D, De Bonis, I, Decamp, D, Ghez, P, Goy, C, Lees, JP, Minard, MN, Odier, P, Pietrzyk, B, Ariztizabal, F, Chmeissani, M, Crespo, JM, Efthymiopoulos, I, Fernandez, E, Fernandez-Bosman, M, Gaitan, V, Garrido, L, Martinez, M, Orteu, S, Pacheco, A, Padilla, C, Palla, F, Pascual, A, Perlas, JA, Sanchez, F, Teubert, F, 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, Huang, X, Lin, J, Ouyang, Q, Wang, T, Xie, Y, Xu, R, Xue, S, Zhang, J, Zhang, L, Zhao, W, Bonvicini, G, Cattaneo, M, Comas, P, Coyle, P, Drevermann, H, Engelhardt, A, Forty, RW, Frank, M, Girone, M, Hagelberg, R, Harvey, J, Jacobsen, R, Janot, P, Jost, B, Knobloch, J, Lehraus, I, Maggi, M, Markou, C, Martin, EB, Mato, P, Meinhard, H, Minten, A, Miquel, R, Oest, T, Palazzi, P, Pater, JR, Perrodo, P, Pusztaszeri, JF, Ranjard, F, Rensing, P, Rolandi, L, Schlatter, D, Schmelling, M, Schneider, O, Tejessy, W, Tomalin, IR, Venturi, A, Wachsmuth, H, Wiedenmann, W, Wildish, T, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadin-Otwinowska, M, Barres, A, Boyer, C & Falvard, A 1995, 'Improved tau polarisation measurement', Zeitschrift fur Physik C-Particles and Fields, vol. 69, núm. 1, pàg. 183-193. https://doi.org/10.1007/BF02907399

TY - JOUR

T1 - Improved tau polarisation measurement

AU - Buskulic, D.

AU - Casper, D.

AU - De Bonis, I.

AU - Decamp, D.

AU - Ghez, P.

AU - Goy, C.

AU - Lees, J. P.

AU - Minard, M. N.

AU - Odier, P.

AU - Pietrzyk, B.

AU - Ariztizabal, F.

AU - Chmeissani, M.

AU - Crespo, J. M.

AU - Efthymiopoulos, I.

AU - Fernandez, E.

AU - Fernandez-Bosman, M.

AU - Gaitan, V.

AU - Garrido, Ll

AU - Martinez, M.

AU - Orteu, S.

AU - Pacheco, A.

AU - Padilla, C.

AU - Palla, F.

AU - Pascual, A.

AU - Perlas, J. A.

AU - Sanchez, F.

AU - Teubert, F.

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 - Huang, X.

AU - Lin, J.

AU - Ouyang, Q.

AU - Wang, T.

AU - Xie, Y.

AU - Xu, R.

AU - Xue, S.

AU - Zhang, J.

AU - Zhang, L.

AU - Zhao, W.

AU - Bonvicini, G.

AU - Cattaneo, M.

AU - Comas, P.

AU - Coyle, P.

AU - Drevermann, H.

AU - Engelhardt, A.

AU - Forty, R. W.

AU - Frank, M.

AU - Girone, M.

AU - Hagelberg, R.

AU - Harvey, J.

AU - Jacobsen, R.

AU - Janot, P.

AU - Jost, B.

AU - Knobloch, J.

AU - Lehraus, I.

AU - Maggi, M.

AU - Markou, C.

AU - Martin, E. B.

AU - Mato, P.

AU - Meinhard, H.

AU - Minten, A.

AU - Miquel, R.

AU - Oest, T.

AU - Palazzi, P.

AU - Pater, J. R.

AU - Perrodo, P.

AU - Pusztaszeri, J. F.

AU - Ranjard, F.

AU - Rensing, P.

AU - Rolandi, L.

AU - Schlatter, D.

AU - Schmelling, M.

AU - Schneider, O.

AU - Tejessy, W.

AU - Tomalin, I. R.

AU - Venturi, A.

AU - Wachsmuth, H.

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.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - Using 22 pb-1 of data collected at LEP in 1992 on the peak of the Z resonance, the ALEPH collaboration has measured the polarisation of the tau leptons decaying into {Mathematical expression}, πν, ρν and a1 ν from their individual decay product distributions. The measurement of the tau polarisation as a function of the production polar angle yields the two parameters N τ and N e, where, in terms of the axial and vector couplings g Al and g Vl, N l=2 g Vl gAl/(g Vl 2 +g Al 2 ). This analysis follows to a large extent the methods devised for the 1990 and 1991 data but with improvements which bring a better understanding of the systematic uncertainties. Combining the 1992 measurements with our previously published results yields N τ=0.136±0.012±0.009 and N e=0.129±0.016±0.005. Assuming e-τ universality, the measurements imply an effective weak mixing angle of sin 2 θ W eff =0.2332±0.0014. © 1996 Springer-Verlag.

AB - Using 22 pb-1 of data collected at LEP in 1992 on the peak of the Z resonance, the ALEPH collaboration has measured the polarisation of the tau leptons decaying into {Mathematical expression}, πν, ρν and a1 ν from their individual decay product distributions. The measurement of the tau polarisation as a function of the production polar angle yields the two parameters N τ and N e, where, in terms of the axial and vector couplings g Al and g Vl, N l=2 g Vl gAl/(g Vl 2 +g Al 2 ). This analysis follows to a large extent the methods devised for the 1990 and 1991 data but with improvements which bring a better understanding of the systematic uncertainties. Combining the 1992 measurements with our previously published results yields N τ=0.136±0.012±0.009 and N e=0.129±0.016±0.005. Assuming e-τ universality, the measurements imply an effective weak mixing angle of sin 2 θ W eff =0.2332±0.0014. © 1996 Springer-Verlag.

U2 - 10.1007/BF02907399

DO - 10.1007/BF02907399

M3 - Article

SN - 0170-9739

VL - 69

SP - 183

EP - 193

JO - Zeitschrift fur Physik C-Particles and Fields

JF - Zeitschrift fur Physik C-Particles and Fields

IS - 1

ER -

Improved tau polarisation measurement

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