A precise determination of the number of families with light neutrinos and of the Z boson partial widths

D. Decamp; B. Deschizeaux; J. P. Lees; M. N. Minard; J. M. Crespo; M. Delfino; E. Fernandez; M. Martinez; R. Miquel; Ll M. Mir; S. Orteu; A. Pacheco; J. A. Perlas; E. Tubau; M. G. Catanesi; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; S. Natali; S. Nuzzo; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; H. Hu; D. Huang; J. Lin; T. Ruan; T. Wang; W. Wu; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; H. Albrecht; W. B. Atwood; F. Bird; E. Blucher; T. H. Burnett; T. Charity; H. Drevermann; Ll Garrido; C. Grab; R. Hagelberg; S. Haywood; B. Jost; M. Kasemann; G. Kellner; J. Knobloch; A. Lacourt; I. Lehraus; T. Lohse; D. Lüke; A. Marchioro; P. Mato; J. May; A. Minten; A. Miotto; P. Palazzi; M. Pepe-Altarelli; F. Ranjard; A. Roth; J. Rothberg; H. Rotscheidt; W. von Rüden; R. St.Denis; D. Schlatter; M. Takashima; M. Talby; H. Taureg; W. Tejessy; H. Wachsmuth; S. Wheeler; W. Wiedenmann; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Falvard; P. Gay; P. Henrard; J. Jousset; B. Michel; J. C. Montret; D. Pallin; P. Perret; J. Proriol; F. Prujhière; J. D. Hansen; J. R. Hansen; P. H. Hansen; R. Møllerud; G. Petersen; E. Simopoulou; A. Vayaki; J. Badier; A. Blondel; G. Bonneaud; J. Bourotte; F. Braems; J. C. Brient; M. A. Ciocci; G. Fouque; R. Guirlet; A. Rougé; M. Rumpf; R. Tanaka; H. Videau; I. Videau; D. J. Candlin; A. Conti; G. Parrini; M. Corden; C. Georgiopoulos; J. H. Goldman; M. Ikeda; J. Lannutti; D. Levinthal; M. Mermikides; L. Sawyer; G. Stimpfl; A. Antonelli; R. Baldini; G. Bencivenni; G. Bologna; F. Bossi; P. Campana; G. Capon; V. Chiarella; G. de Ninno; B. D'Ettorre-Piazzoli; G. Felici; P. Laurelli; G. Mannocchi; F. Murtas; G. P. Murtas; G. Nicoletti; P. Picchi; P. Zografou; B. Altoon; O. Boyle; A. W. Halley; I. Ten Have; J. L. Hearns; I. S. Hughes; J. G. Lynch; W. T. Morton; C. Raine; J. M. Scarr; K. Smith; A. S. Thompson; B. Brandl; O. Braun; R. Geiges; C. Geweniger; P. Hanke; V. Hepp; E. E. Kluge; Y. Maumary; M. Panter; A. Putzer; B. Rensch; A. Stahl; K. Tittel; M. Wunsch; A. T. Belk; R. Beuselinck; D. M. Binnie; W. Cameron; M. Cattaneo; P. J. Dornan; S. Dugeay; R. W. Forty; A. M. Greene; J. F. Hassard; S. J. Patton; J. K. Sedgbeer; G. Taylor; I. R. Tomalin; A. G. Wright; P. Girtler; D. Kuhn; G. Rudolph; C. K. Bowdery; T. J. Brodbeck; A. J. Finch; F. Foster; G. Hughes; N. R. Keemer; M. Nuttall; B. S. Rowlingson; T. Sloan; W. Snow; T. Barczewski; L. A.T. Bauerdick; K. Kleinknecht; B. Renk; S. Roehn; H. G. Sander; M. Schmelling; F. Steeg; J. P. Albanese; J. J. Aubert; C. Benchouk; A. Bonissent; D. Courvoisier; F. Etienne; E. Matsinos; S. Papalexiou; P. Payre; B. Pietrzyk; Z. Qian; W. Blum; P. Cattaneo; G. Cowan; B. Dehning; H. Dietl; M. Fernandez-Bosman; D. Hauff; A. Jahn; E. Lange; G. Lütjens; G. Lutz; W. Männer; H. G. Moser; Y. Pan; R. Richter; A. S. Schwarz; R. Settles; U. Stiegler; U. Stierlin; J. Thomas; G. Waltermann; V. Bertin; G. de Bouard; J. Boucrot; O. Callot; X. Chen; A. Cordier; M. Davier; G. Ganis; J. F. Grivaz; Ph Heusse; P. Janot; V. Journé; D. W. Kim; J. Lefrançois; A. M. Lutz; J. J. Veillet; F. Zomer; S. R. Amendolia; G. Bagliesi; G. Batignani; L. Bosisio; U. Bottigli; C. Bradaschia; I. Ferrante; F. Fidecaro; L. Foà; E. Focardi; F. Forti; A. Giassi; M. A. Giorgi; F. Ligabue; A. Lusiani; E. B. Mannelli; P. S. Marrocchesi; A. Messineo; F. Palla; G. Sanguinetti; S. Scapellato; J. Steinberger; R. Tenchini; G. Tonelli; G. Triggiani; J. M. Carter; M. G. Green; P. V. March; T. Medcalf; M. R. Saich; J. A. Strong; R. M. Thomas; T. Wildish; D. R. Botterill; R. W. Clifft; T. R. Edgecock; M. Edwards; S. M. Fisher; J. Harvey; T. J. Jones; P. R. Norton; D. P. Salmon; J. C. Thompson; E. Aubourg; B. Bloch-Devaux; P. Colas; C. Klopfenstein; E. Lançon; E. Locci; S. Loucatos; L. Mirabito; E. Monnier; P. Perez; F. Perrier; J. Rander; J. F. Renardy; A. Roussanrie; J. P. Schuller; J. G. Ashman; C. N. Booth; F. Combley; M. Dinnsdale; J. Martin; D. Parker; L. F. Thompson; S. Brandt; H. Burkhardt; C. Grupen; H. Meinhard; E. Neugebauer; U. Schäfer; H. Seywerd; B. Gobbo; F. Liello; E. Millotti; F. Ragusa; L. Rolandi; L. Bellantoni; J. F. Boudreau; D. Cinabro; J. S. Conway; D. F. Cowen; Z. Feng; J. L. Harton; J. Hilgart; R. C. Jared; R. P. Johnson; B. W. Leclaire; Y. B. Pan; T. Parker; J. R. Pater; Y. Saadi; V. Sharma; J. A. Wear; F. V. Weber; Sau Lan Wu; S. T. Xue; G. Zobernig

doi:10.1016/0370-2693(90)91984-J

A precise determination of the number of families with light neutrinos and of the Z boson partial widths

D. Decamp, B. Deschizeaux, J. P. Lees, M. N. Minard, J. M. Crespo, M. Delfino, E. Fernandez, M. Martinez, R. Miquel, Ll M. Mir, S. Orteu, A. Pacheco, J. A. Perlas, E. Tubau, M. G. Catanesi, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, S. NataliS. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, H. Hu, D. Huang, J. Lin, T. Ruan, T. Wang, W. Wu, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, H. Albrecht, W. B. Atwood, F. Bird, E. Blucher, T. H. Burnett, T. Charity, H. Drevermann, Ll Garrido, C. Grab, R. Hagelberg, S. Haywood, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, I. Lehraus, T. Lohse, D. Lüke, A. Marchioro, P. Mato, J. May, A. Minten, A. Miotto, P. Palazzi, M. Pepe-Altarelli, F. Ranjard, A. Roth, J. Rothberg, H. Rotscheidt, W. von Rüden, R. St.Denis, D. Schlatter, M. Takashima, M. Talby, H. Taureg, W. Tejessy, H. Wachsmuth, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard, P. Gay, P. Henrard, J. Jousset, B. Michel, J. C. Montret, D. Pallin, P. Perret, J. Proriol, F. Prujhière, J. D. Hansen, J. R. Hansen, P. H. Hansen, R. Møllerud, G. Petersen, E. Simopoulou, A. Vayaki, J. Badier, A. Blondel, G. Bonneaud, J. Bourotte, F. Braems, J. C. Brient, M. A. Ciocci, G. Fouque, R. Guirlet, A. Rougé, M. Rumpf, R. Tanaka, H. Videau, I. Videau, D. J. Candlin, A. Conti, G. Parrini, M. Corden, C. Georgiopoulos, J. H. Goldman, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, G. Stimpfl, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, G. de Ninno, B. D'Ettorre-Piazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. P. Murtas, G. Nicoletti, P. Picchi, P. Zografou, B. Altoon, O. Boyle, A. W. Halley, I. Ten Have, J. L. Hearns, I. S. Hughes, J. G. Lynch, W. T. Morton, C. Raine, J. M. Scarr, K. Smith, A. S. Thompson, B. Brandl, O. Braun, R. Geiges, C. Geweniger, P. Hanke, V. Hepp, E. E. Kluge, Y. Maumary, M. Panter, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A. T. Belk, R. Beuselinck, D. M. Binnie, W. Cameron, M. Cattaneo, P. J. Dornan, S. Dugeay, R. W. Forty, A. M. Greene, J. F. Hassard, S. J. Patton, J. K. Sedgbeer, G. Taylor, I. R. Tomalin, A. G. Wright, P. Girtler, D. Kuhn, G. Rudolph, C. K. Bowdery, T. J. Brodbeck, A. J. Finch, F. Foster, G. Hughes, N. R. Keemer, M. Nuttall, B. S. Rowlingson, T. Sloan, W. Snow, T. Barczewski, L. A.T. Bauerdick, K. Kleinknecht, B. Renk, S. Roehn, H. G. Sander, M. Schmelling, F. Steeg, J. P. Albanese, J. J. Aubert, C. Benchouk, A. Bonissent, D. Courvoisier, F. Etienne, E. Matsinos, S. Papalexiou, P. Payre, B. Pietrzyk, Z. Qian, W. Blum, P. Cattaneo, G. Cowan, B. Dehning, H. Dietl, M. Fernandez-Bosman, D. Hauff, A. Jahn, E. Lange, G. Lütjens, G. Lutz, W. Männer, H. G. Moser, Y. Pan, R. Richter, A. S. Schwarz, R. Settles, U. Stiegler, U. Stierlin, J. Thomas, G. Waltermann, V. Bertin, G. de Bouard, J. Boucrot, O. Callot, X. Chen, A. Cordier, M. Davier, G. Ganis, J. F. Grivaz, Ph Heusse, P. Janot, V. Journé, D. W. Kim, J. Lefrançois, A. M. Lutz, J. J. Veillet, F. Zomer, S. R. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, I. Ferrante, F. Fidecaro, L. Foà, E. Focardi, F. Forti, A. Giassi, M. A. Giorgi, F. Ligabue, A. Lusiani, E. B. Mannelli, P. S. Marrocchesi, A. Messineo, F. Palla, G. Sanguinetti, S. Scapellato, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, J. M. Carter, M. G. Green, P. V. March, T. Medcalf, M. R. Saich, J. A. Strong, R. M. Thomas, T. Wildish, D. R. Botterill, R. W. Clifft, T. R. Edgecock, M. Edwards, S. M. Fisher, J. Harvey, T. J. Jones, P. R. Norton, D. P. Salmon, J. C. Thompson, E. Aubourg, B. Bloch-Devaux, P. Colas, C. Klopfenstein, E. Lançon, E. Locci, S. Loucatos, L. Mirabito, E. Monnier, P. Perez, F. Perrier, J. Rander, J. F. Renardy, A. Roussanrie, J. P. Schuller, J. G. Ashman, C. N. Booth, F. Combley, M. Dinnsdale, J. Martin, D. Parker, L. F. Thompson, S. Brandt, H. Burkhardt, C. Grupen, H. Meinhard, E. Neugebauer, U. Schäfer, H. Seywerd, B. Gobbo, F. Liello, E. Millotti, F. Ragusa, L. Rolandi, L. Bellantoni, J. F. Boudreau, D. Cinabro, J. S. Conway, D. F. Cowen, Z. Feng, J. L. Harton, J. Hilgart, R. C. Jared, R. P. Johnson, B. W. Leclaire, Y. B. Pan, T. Parker, J. R. Pater, Y. Saadi, V. Sharma, J. A. Wear, F. V. Weber, Sau Lan Wu, S. T. Xue, G. Zobernig

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

More extensive and precise results are reported on the parameters of Z decay. On the basis of 20 000 Z decays collected with the ALEPH detector at LEP we find M_z=91.182±0.026 (exp.) ±0.030 (beam) GeV, Γ_z=2.541±0.056 GeV and σ_had ⁰=41.4±0.8 nb. The partial widths for the hadronic and leptonic channels are Γ_had=1804±44 MeV, Γ_e⁺e^-=82.1±3.4 MeV, Γ_μ⁺μ^-=87.9±6.0 MeV and Γ_τ⁺τ^-=86.1±5.6 MeV, in good agreement with the standard model. On the basis of the average leptonic width Γ_ℓ⁺ℓ^-=83.9±2.2 MeV, the effective weak mixing angle is found to be sin²θ_w(M_z)=0.231±0.008. Usin g the partial widths calculated in the standard model, the number of light neutrino families is N_ν=3.01±0.15 (exp.)±0.05 (theor.).

Original language	English (US)
Pages (from-to)	399-411
Number of pages	13
Journal	Physics Letters B
Volume	235
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(90)91984-J
State	Published - Feb 1 1990

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1016/0370-2693(90)91984-J

Cite this

Decamp, D., Deschizeaux, B., Lees, J. P., Minard, M. N., Crespo, J. M., Delfino, M., Fernandez, E., Martinez, M., Miquel, R., Mir, L. M., Orteu, S., Pacheco, A., Perlas, J. A., Tubau, E., Catanesi, M. G., de Palma, M., Farilla, A., Iaselli, G., Maggi, G., ... Zobernig, G. (1990). A precise determination of the number of families with light neutrinos and of the Z boson partial widths. Physics Letters B, 235(3-4), 399-411. https://doi.org/10.1016/0370-2693(90)91984-J

@article{1326b914012449b2ac22b5e5008f2b37,

title = "A precise determination of the number of families with light neutrinos and of the Z boson partial widths",

abstract = "More extensive and precise results are reported on the parameters of Z decay. On the basis of 20 000 Z decays collected with the ALEPH detector at LEP we find Mz=91.182±0.026 (exp.) ±0.030 (beam) GeV, Γz=2.541±0.056 GeV and σhad 0=41.4±0.8 nb. The partial widths for the hadronic and leptonic channels are Γhad=1804±44 MeV, Γe+e- =82.1±3.4 MeV, Γμ+μ- =87.9±6.0 MeV and Γτ+τ- =86.1±5.6 MeV, in good agreement with the standard model. On the basis of the average leptonic width Γℓ+ℓ- =83.9±2.2 MeV, the effective weak mixing angle is found to be sin2θw(Mz)=0.231±0.008. Usin g the partial widths calculated in the standard model, the number of light neutrino families is Nν=3.01±0.15 (exp.)±0.05 (theor.).",

author = "D. Decamp and B. Deschizeaux and Lees, {J. P.} and Minard, {M. N.} and Crespo, {J. M.} and M. Delfino and E. Fernandez and M. Martinez and R. Miquel and Mir, {Ll M.} and S. Orteu and A. Pacheco and Perlas, {J. A.} and E. Tubau and Catanesi, {M. G.} and {de Palma}, M. and A. Farilla and G. Iaselli and G. Maggi 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 H. Hu and D. Huang and J. Lin and T. Ruan and T. Wang and W. Wu and Y. Xie and D. Xu and R. Xu and J. Zhang and W. Zhao and H. Albrecht and Atwood, {W. B.} and F. Bird and E. Blucher and Burnett, {T. H.} and T. Charity and H. Drevermann and Ll Garrido and C. Grab and R. Hagelberg and S. Haywood and B. Jost and M. Kasemann and G. Kellner and J. Knobloch and A. Lacourt and I. Lehraus and T. Lohse and D. L{\"u}ke and A. Marchioro and P. Mato and J. May and A. Minten and A. Miotto and P. Palazzi and M. Pepe-Altarelli and F. Ranjard and A. Roth and J. Rothberg and H. Rotscheidt and {von R{\"u}den}, W. and R. St.Denis and D. Schlatter and M. Takashima and M. Talby and H. Taureg and W. Tejessy and H. Wachsmuth and S. Wheeler and W. Wiedenmann and W. Witzeling and J. Wotschack and Z. Ajaltouni and M. Bardadin-Otwinowska and A. Falvard and P. Gay and P. Henrard and J. Jousset and B. Michel and Montret, {J. C.} and D. Pallin and P. Perret and J. Proriol and F. Prujhi{\`e}re and Hansen, {J. D.} and Hansen, {J. R.} and Hansen, {P. H.} and R. M{\o}llerud and G. Petersen and E. Simopoulou and A. Vayaki and J. Badier and A. Blondel and G. Bonneaud and J. Bourotte and F. Braems and Brient, {J. C.} and Ciocci, {M. A.} and G. Fouque and R. Guirlet and A. Roug{\'e} and M. Rumpf and R. Tanaka and H. Videau and I. Videau and Candlin, {D. J.} and A. Conti and G. Parrini and M. Corden and C. Georgiopoulos and Goldman, {J. H.} and M. Ikeda and J. Lannutti and D. Levinthal and M. Mermikides and L. Sawyer and G. Stimpfl and A. Antonelli and R. Baldini and G. Bencivenni and G. Bologna and F. Bossi and P. Campana and G. Capon and V. Chiarella and {de Ninno}, G. and B. D'Ettorre-Piazzoli and G. Felici and P. Laurelli and G. Mannocchi and F. Murtas and Murtas, {G. P.} and G. Nicoletti and P. Picchi and P. Zografou and B. Altoon and O. Boyle and Halley, {A. W.} and {Ten Have}, I. and Hearns, {J. L.} and Hughes, {I. S.} and Lynch, {J. G.} and Morton, {W. T.} and C. Raine and Scarr, {J. M.} and K. Smith and Thompson, {A. S.} and B. Brandl and O. Braun and R. Geiges and C. Geweniger and P. Hanke and V. Hepp and Kluge, {E. E.} and Y. Maumary and M. Panter and A. Putzer and B. Rensch and A. Stahl and K. Tittel and M. Wunsch and Belk, {A. T.} and R. Beuselinck and Binnie, {D. M.} and W. Cameron and M. Cattaneo and Dornan, {P. J.} and S. Dugeay and Forty, {R. W.} and Greene, {A. M.} and Hassard, {J. F.} and Patton, {S. J.} and Sedgbeer, {J. K.} and G. Taylor and Tomalin, {I. R.} and Wright, {A. G.} and P. Girtler and D. Kuhn and G. Rudolph and Bowdery, {C. K.} and Brodbeck, {T. J.} and Finch, {A. J.} and F. Foster and G. Hughes and Keemer, {N. R.} and M. Nuttall and Rowlingson, {B. S.} and T. Sloan and W. Snow and T. Barczewski and Bauerdick, {L. A.T.} and K. Kleinknecht and B. Renk and S. Roehn and Sander, {H. G.} and M. Schmelling and F. Steeg and Albanese, {J. P.} and Aubert, {J. J.} and C. Benchouk and A. Bonissent and D. Courvoisier and F. Etienne and E. Matsinos and S. Papalexiou and P. Payre and B. Pietrzyk and Z. Qian and W. Blum and P. Cattaneo and G. Cowan and B. Dehning and H. Dietl and M. Fernandez-Bosman and D. Hauff and A. Jahn and E. Lange and G. L{\"u}tjens and G. Lutz and W. M{\"a}nner and Moser, {H. G.} and Y. Pan and R. Richter and Schwarz, {A. S.} and R. Settles and U. Stiegler and U. Stierlin and J. Thomas and G. Waltermann and V. Bertin and {de Bouard}, G. and J. Boucrot and O. Callot and X. Chen and A. Cordier and M. Davier and G. Ganis and Grivaz, {J. F.} and Ph Heusse and P. Janot and V. Journ{\'e} and Kim, {D. W.} and J. Lefran{\c c}ois and Lutz, {A. M.} and Veillet, {J. J.} and F. Zomer and Amendolia, {S. R.} and G. Bagliesi and G. Batignani and L. Bosisio and U. Bottigli and C. Bradaschia and I. Ferrante and F. Fidecaro and L. Fo{\`a} and E. Focardi and F. Forti and A. Giassi and Giorgi, {M. A.} and F. Ligabue and A. Lusiani and Mannelli, {E. B.} and Marrocchesi, {P. S.} and A. Messineo and F. Palla and G. Sanguinetti and S. Scapellato and J. Steinberger and R. Tenchini and G. Tonelli and G. Triggiani and Carter, {J. M.} and Green, {M. G.} and March, {P. V.} and T. Medcalf and Saich, {M. R.} and Strong, {J. A.} and Thomas, {R. M.} and T. Wildish and Botterill, {D. R.} and Clifft, {R. W.} and Edgecock, {T. R.} and M. Edwards and Fisher, {S. M.} and J. Harvey and Jones, {T. J.} and Norton, {P. R.} and Salmon, {D. P.} and Thompson, {J. C.} and E. Aubourg and B. Bloch-Devaux and P. Colas and C. Klopfenstein and E. Lan{\c c}on and E. Locci and S. Loucatos and L. Mirabito and E. Monnier and P. Perez and F. Perrier and J. Rander and Renardy, {J. F.} and A. Roussanrie and Schuller, {J. P.} and Ashman, {J. G.} and Booth, {C. N.} and F. Combley and M. Dinnsdale and J. Martin and D. Parker and Thompson, {L. F.} and S. Brandt and H. Burkhardt and C. Grupen and H. Meinhard and E. Neugebauer and U. Sch{\"a}fer and H. Seywerd and B. Gobbo and F. Liello and E. Millotti and F. Ragusa and L. Rolandi and L. Bellantoni and Boudreau, {J. F.} and D. Cinabro and Conway, {J. S.} and Cowen, {D. F.} and Z. Feng and Harton, {J. L.} and J. Hilgart and Jared, {R. C.} and Johnson, {R. P.} and Leclaire, {B. W.} and Pan, {Y. B.} and T. Parker and Pater, {J. R.} and Y. Saadi and V. Sharma and Wear, {J. A.} and Weber, {F. V.} and Wu, {Sau Lan} and Xue, {S. T.} and G. Zobernig",

note = "Funding Information: With the start-up of LEP, one of the intercsting questions which could be addrcsscd was that of the number of neutrino species into which the Z decays, not by the direct observation of the neutrinos, but by Present address: CERN, CH-121 I Geneva 23, Switzerland. 2 Supported by CAICYT, Spain. 3 Supported by the National Science Foundation of China. 4 Permanent address: DESY, D-2000 Hamburg 52, FRG. On leave of absence from SLAC, Stanford, CA 94309, USA. 6 On leave of absence from University of Washington, Seattle, WA 98195, USA. 7 Supported by the Danish Natural Science Research Council. 8 Supported by the UK Science and Engineering Research Council. 9 Supported by SLOAN fellowship, contract BR 2703. ~0 Supported by the US Department of Energy, contract DE-FG05-87ER40319. u Supported by the NSF, contract PHY-8451274. J2 Supported by the US Department of Energy, contract DE-FCOS-85ER250000. ~3 Also at Istituto di Fisica Gcnerale, Universitfi di Torino, Turin, It',dy. ~4 Also at lstituto di Cosmo-Geofisica del CNR, Turin, Italy. ~5 Supported by the Bundcsministerium ffir Forschung und Technologie, FRG. t6 Supported by Fonds zur F6rderung der wisscnschaftlichcn Forschung, Austria. ~7 Supported by the lnstitut de Recherche Fondamcntale du CEA. ~8 Present address: INFN, Sezione di Milano, 1-20133 Milan, Italy. ~9 Permanent address: LBL, Berkeley, CA 94720, USA. 20 Supported by the US Department of Energy, contract DE-AC02-76ER00881.",

year = "1990",

month = feb,

day = "1",

doi = "10.1016/0370-2693(90)91984-J",

language = "English (US)",

volume = "235",

pages = "399--411",

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

issn = "0370-2693",

publisher = "Elsevier",

number = "3-4",

}

Decamp, D, Deschizeaux, B, Lees, JP, Minard, MN, Crespo, JM, Delfino, M, Fernandez, E, Martinez, M, Miquel, R, Mir, LM, Orteu, S, Pacheco, A, Perlas, JA, Tubau, E, Catanesi, MG, de Palma, M, Farilla, A, Iaselli, G, Maggi, G, Natali, S, Nuzzo, S, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Hu, H, Huang, D, Lin, J, Ruan, T, Wang, T, Wu, W, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhao, W, Albrecht, H, Atwood, WB, Bird, F, Blucher, E, Burnett, TH, Charity, T, Drevermann, H, Garrido, L, Grab, C, Hagelberg, R, Haywood, S, Jost, B, Kasemann, M, Kellner, G, Knobloch, J, Lacourt, A, Lehraus, I, Lohse, T, Lüke, D, Marchioro, A, Mato, P, May, J, Minten, A, Miotto, A, Palazzi, P, Pepe-Altarelli, M, Ranjard, F, Roth, A, Rothberg, J, Rotscheidt, H, von Rüden, W, St.Denis, R, Schlatter, D, Takashima, M, Talby, M, Taureg, H, Tejessy, W, Wachsmuth, H, Wheeler, S, Wiedenmann, W, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadin-Otwinowska, M, Falvard, A, Gay, P, Henrard, P, Jousset, J, Michel, B, Montret, JC, Pallin, D, Perret, P, Proriol, J, Prujhière, F, Hansen, JD, Hansen, JR, Hansen, PH, Møllerud, R, Petersen, G, Simopoulou, E, Vayaki, A, Badier, J, Blondel, A, Bonneaud, G, Bourotte, J, Braems, F, Brient, JC, Ciocci, MA, Fouque, G, Guirlet, R, Rougé, A, Rumpf, M, Tanaka, R, Videau, H, Videau, I, Candlin, DJ, Conti, A, Parrini, G, Corden, M, Georgiopoulos, C, Goldman, JH, Ikeda, M, Lannutti, J, Levinthal, D, Mermikides, M, Sawyer, L, Stimpfl, G, Antonelli, A, Baldini, R, Bencivenni, G, Bologna, G, Bossi, F, Campana, P, Capon, G, Chiarella, V, de Ninno, G, D'Ettorre-Piazzoli, B, Felici, G, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, GP, Nicoletti, G, Picchi, P, Zografou, P, Altoon, B, Boyle, O, Halley, AW, Ten Have, I, Hearns, JL, Hughes, IS, Lynch, JG, Morton, WT, Raine, C, Scarr, JM, Smith, K, Thompson, AS, Brandl, B, Braun, O, Geiges, R, Geweniger, C, Hanke, P, Hepp, V, Kluge, EE, Maumary, Y, Panter, M, Putzer, A, Rensch, B, Stahl, A, Tittel, K, Wunsch, M, Belk, AT, Beuselinck, R, Binnie, DM, Cameron, W, Cattaneo, M, Dornan, PJ, Dugeay, S, Forty, RW, Greene, AM, Hassard, JF, Patton, SJ, Sedgbeer, JK, Taylor, G, Tomalin, IR, Wright, AG, Girtler, P, Kuhn, D, Rudolph, G, Bowdery, CK, Brodbeck, TJ, Finch, AJ, Foster, F, Hughes, G, Keemer, NR, Nuttall, M, Rowlingson, BS, Sloan, T, Snow, W, Barczewski, T, Bauerdick, LAT, Kleinknecht, K, Renk, B, Roehn, S, Sander, HG, Schmelling, M, Steeg, F, Albanese, JP, Aubert, JJ, Benchouk, C, Bonissent, A, Courvoisier, D, Etienne, F, Matsinos, E, Papalexiou, S, Payre, P, Pietrzyk, B, Qian, Z, Blum, W, Cattaneo, P, Cowan, G, Dehning, B, Dietl, H, Fernandez-Bosman, M, Hauff, D, Jahn, A, Lange, E, Lütjens, G, Lutz, G, Männer, W, Moser, HG, Pan, Y, Richter, R, Schwarz, AS, Settles, R, Stiegler, U, Stierlin, U, Thomas, J, Waltermann, G, Bertin, V, de Bouard, G, Boucrot, J, Callot, O, Chen, X, Cordier, A, Davier, M, Ganis, G, Grivaz, JF, Heusse, P, Janot, P, Journé, V, Kim, DW, Lefrançois, J, Lutz, AM, Veillet, JJ, Zomer, F, Amendolia, SR, Bagliesi, G, Batignani, G, Bosisio, L, Bottigli, U, Bradaschia, C, Ferrante, I, Fidecaro, F, Foà, L, Focardi, E, Forti, F, Giassi, A, Giorgi, MA, Ligabue, F, Lusiani, A, Mannelli, EB, Marrocchesi, PS, Messineo, A, Palla, F, Sanguinetti, G, Scapellato, S, Steinberger, J, Tenchini, R, Tonelli, G, Triggiani, G, Carter, JM, Green, MG, March, PV, Medcalf, T, Saich, MR, Strong, JA, Thomas, RM, Wildish, T, Botterill, DR, Clifft, RW, Edgecock, TR, Edwards, M, Fisher, SM, Harvey, J, Jones, TJ, Norton, PR, Salmon, DP, Thompson, JC, Aubourg, E, Bloch-Devaux, B, Colas, P, Klopfenstein, C, Lançon, E, Locci, E, Loucatos, S, Mirabito, L, Monnier, E, Perez, P, Perrier, F, Rander, J, Renardy, JF, Roussanrie, A, Schuller, JP, Ashman, JG, Booth, CN, Combley, F, Dinnsdale, M, Martin, J, Parker, D, Thompson, LF, Brandt, S, Burkhardt, H, Grupen, C, Meinhard, H, Neugebauer, E, Schäfer, U, Seywerd, H, Gobbo, B, Liello, F, Millotti, E, Ragusa, F, Rolandi, L, Bellantoni, L, Boudreau, JF, Cinabro, D, Conway, JS, Cowen, DF, Feng, Z, Harton, JL, Hilgart, J, Jared, RC, Johnson, RP, Leclaire, BW, Pan, YB, Parker, T, Pater, JR, Saadi, Y, Sharma, V, Wear, JA, Weber, FV, Wu, SL, Xue, ST & Zobernig, G 1990, 'A precise determination of the number of families with light neutrinos and of the Z boson partial widths', Physics Letters B, vol. 235, no. 3-4, pp. 399-411. https://doi.org/10.1016/0370-2693(90)91984-J

TY - JOUR

T1 - A precise determination of the number of families with light neutrinos and of the Z boson partial widths

AU - Decamp, D.

AU - Deschizeaux, B.

AU - Lees, J. P.

AU - Minard, M. N.

AU - Crespo, J. M.

AU - Delfino, M.

AU - Fernandez, E.

AU - Martinez, M.

AU - Miquel, R.

AU - Mir, Ll M.

AU - Orteu, S.

AU - Pacheco, A.

AU - Perlas, J. A.

AU - Tubau, E.

AU - Catanesi, M. G.

AU - de Palma, M.

AU - Farilla, A.

AU - Iaselli, G.

AU - Maggi, G.

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 - Hu, H.

AU - Huang, D.

AU - Lin, J.

AU - Ruan, T.

AU - Wang, T.

AU - Wu, W.

AU - Xie, Y.

AU - Xu, D.

AU - Xu, R.

AU - Zhang, J.

AU - Zhao, W.

AU - Albrecht, H.

AU - Atwood, W. B.

AU - Bird, F.

AU - Blucher, E.

AU - Burnett, T. H.

AU - Charity, T.

AU - Drevermann, H.

AU - Garrido, Ll

AU - Grab, C.

AU - Hagelberg, R.

AU - Haywood, S.

AU - Jost, B.

AU - Kasemann, M.

AU - Kellner, G.

AU - Knobloch, J.

AU - Lacourt, A.

AU - Lehraus, I.

AU - Lohse, T.

AU - Lüke, D.

AU - Marchioro, A.

AU - Mato, P.

AU - May, J.

AU - Minten, A.

AU - Miotto, A.

AU - Palazzi, P.

AU - Pepe-Altarelli, M.

AU - Ranjard, F.

AU - Roth, A.

AU - Rothberg, J.

AU - Rotscheidt, H.

AU - von Rüden, W.

AU - St.Denis, R.

AU - Schlatter, D.

AU - Takashima, M.

AU - Talby, M.

AU - Taureg, H.

AU - Tejessy, W.

AU - Wachsmuth, H.

AU - Wheeler, S.

AU - Wiedenmann, W.

AU - Witzeling, W.

AU - Wotschack, J.

AU - Ajaltouni, Z.

AU - Bardadin-Otwinowska, M.

AU - Falvard, A.

AU - Gay, P.

AU - Henrard, P.

AU - Jousset, J.

AU - Michel, B.

AU - Montret, J. C.

AU - Pallin, D.

AU - Perret, P.

AU - Proriol, J.

AU - Prujhière, F.

AU - Hansen, J. D.

AU - Hansen, J. R.

AU - Hansen, P. H.

AU - Møllerud, R.

AU - Petersen, G.

AU - Simopoulou, E.

AU - Vayaki, A.

AU - Badier, J.

AU - Blondel, A.

AU - Bonneaud, G.

AU - Bourotte, J.

AU - Braems, F.

AU - Brient, J. C.

AU - Ciocci, M. A.

AU - Fouque, G.

AU - Guirlet, R.

AU - Rougé, A.

AU - Rumpf, M.

AU - Tanaka, R.

AU - Videau, H.

AU - Videau, I.

AU - Candlin, D. J.

AU - Conti, A.

AU - Parrini, G.

AU - Corden, M.

AU - Georgiopoulos, C.

AU - Goldman, J. H.

AU - Ikeda, M.

AU - Lannutti, J.

AU - Levinthal, D.

AU - Mermikides, M.

AU - Sawyer, L.

AU - Stimpfl, G.

AU - Antonelli, A.

AU - Baldini, R.

AU - Bencivenni, G.

AU - Bologna, G.

AU - Bossi, F.

AU - Campana, P.

AU - Capon, G.

AU - Chiarella, V.

AU - de Ninno, G.

AU - D'Ettorre-Piazzoli, B.

AU - Felici, G.

AU - Laurelli, P.

AU - Mannocchi, G.

AU - Murtas, F.

AU - Murtas, G. P.

AU - Nicoletti, G.

AU - Picchi, P.

AU - Zografou, P.

AU - Altoon, B.

AU - Boyle, O.

AU - Halley, A. W.

AU - Ten Have, I.

AU - Hearns, J. L.

AU - Hughes, I. S.

AU - Lynch, J. G.

AU - Morton, W. T.

AU - Raine, C.

AU - Scarr, J. M.

AU - Smith, K.

AU - Thompson, A. S.

AU - Brandl, B.

AU - Braun, O.

AU - Geiges, R.

AU - Geweniger, C.

AU - Hanke, P.

AU - Hepp, V.

AU - Kluge, E. E.

AU - Maumary, Y.

AU - Panter, M.

AU - Putzer, A.

AU - Rensch, B.

AU - Stahl, A.

AU - Tittel, K.

AU - Wunsch, M.

AU - Belk, A. T.

AU - Beuselinck, R.

AU - Binnie, D. M.

AU - Cameron, W.

AU - Cattaneo, M.

AU - Dornan, P. J.

AU - Dugeay, S.

AU - Forty, R. W.

AU - Greene, A. M.

AU - Hassard, J. F.

AU - Patton, S. J.

AU - Sedgbeer, J. K.

AU - Taylor, G.

AU - Tomalin, I. R.

AU - Wright, A. G.

AU - Girtler, P.

AU - Kuhn, D.

AU - Rudolph, G.

AU - Bowdery, C. K.

AU - Brodbeck, T. J.

AU - Finch, A. J.

AU - Foster, F.

AU - Hughes, G.

AU - Keemer, N. R.

AU - Nuttall, M.

AU - Rowlingson, B. S.

AU - Sloan, T.

AU - Snow, W.

AU - Barczewski, T.

AU - Bauerdick, L. A.T.

AU - Kleinknecht, K.

AU - Renk, B.

AU - Roehn, S.

AU - Sander, H. G.

AU - Schmelling, M.

AU - Steeg, F.

AU - Albanese, J. P.

AU - Aubert, J. J.

AU - Benchouk, C.

AU - Bonissent, A.

AU - Courvoisier, D.

AU - Etienne, F.

AU - Matsinos, E.

AU - Papalexiou, S.

AU - Payre, P.

AU - Pietrzyk, B.

AU - Qian, Z.

AU - Blum, W.

AU - Cattaneo, P.

AU - Cowan, G.

AU - Dehning, B.

AU - Dietl, H.

AU - Fernandez-Bosman, M.

AU - Hauff, D.

AU - Jahn, A.

AU - Lange, E.

AU - Lütjens, G.

AU - Lutz, G.

AU - Männer, W.

AU - Moser, H. G.

AU - Pan, Y.

AU - Richter, R.

AU - Schwarz, A. S.

AU - Settles, R.

AU - Stiegler, U.

AU - Stierlin, U.

AU - Thomas, J.

AU - Waltermann, G.

AU - Bertin, V.

AU - de Bouard, G.

AU - Boucrot, J.

AU - Callot, O.

AU - Chen, X.

AU - Cordier, A.

AU - Davier, M.

AU - Ganis, G.

AU - Grivaz, J. F.

AU - Heusse, Ph

AU - Janot, P.

AU - Journé, V.

AU - Kim, D. W.

AU - Lefrançois, J.

AU - Lutz, A. M.

AU - Veillet, J. J.

AU - Zomer, F.

AU - Amendolia, S. R.

AU - Bagliesi, G.

AU - Batignani, G.

AU - Bosisio, L.

AU - Bottigli, U.

AU - Bradaschia, C.

AU - Ferrante, I.

AU - Fidecaro, F.

AU - Foà, L.

AU - Focardi, E.

AU - Forti, F.

AU - Giassi, A.

AU - Giorgi, M. A.

AU - Ligabue, F.

AU - Lusiani, A.

AU - Mannelli, E. B.

AU - Marrocchesi, P. S.

AU - Messineo, A.

AU - Palla, F.

AU - Sanguinetti, G.

AU - Scapellato, S.

AU - Steinberger, J.

AU - Tenchini, R.

AU - Tonelli, G.

AU - Triggiani, G.

AU - Carter, J. M.

AU - Green, M. G.

AU - March, P. V.

AU - Medcalf, T.

AU - Saich, M. R.

AU - Strong, J. A.

AU - Thomas, R. M.

AU - Wildish, T.

AU - Botterill, D. R.

AU - Clifft, R. W.

AU - Edgecock, T. R.

AU - Edwards, M.

AU - Fisher, S. M.

AU - Harvey, J.

AU - Jones, T. J.

AU - Norton, P. R.

AU - Salmon, D. P.

AU - Thompson, J. C.

AU - Aubourg, E.

AU - Bloch-Devaux, B.

AU - Colas, P.

AU - Klopfenstein, C.

AU - Lançon, E.

AU - Locci, E.

AU - Loucatos, S.

AU - Mirabito, L.

AU - Monnier, E.

AU - Perez, P.

AU - Perrier, F.

AU - Rander, J.

AU - Renardy, J. F.

AU - Roussanrie, A.

AU - Schuller, J. P.

AU - Ashman, J. G.

AU - Booth, C. N.

AU - Combley, F.

AU - Dinnsdale, M.

AU - Martin, J.

AU - Parker, D.

AU - Thompson, L. F.

AU - Brandt, S.

AU - Burkhardt, H.

AU - Grupen, C.

AU - Meinhard, H.

AU - Neugebauer, E.

AU - Schäfer, U.

AU - Seywerd, H.

AU - Gobbo, B.

AU - Liello, F.

AU - Millotti, E.

AU - Ragusa, F.

AU - Rolandi, L.

AU - Bellantoni, L.

AU - Boudreau, J. F.

AU - Cinabro, D.

AU - Conway, J. S.

AU - Cowen, D. F.

AU - Feng, Z.

AU - Harton, J. L.

AU - Hilgart, J.

AU - Jared, R. C.

AU - Johnson, R. P.

AU - Leclaire, B. W.

AU - Pan, Y. B.

AU - Parker, T.

AU - Pater, J. R.

AU - Saadi, Y.

AU - Sharma, V.

AU - Wear, J. A.

AU - Weber, F. V.

AU - Wu, Sau Lan

AU - Xue, S. T.

AU - Zobernig, G.

N1 - Funding Information: With the start-up of LEP, one of the intercsting questions which could be addrcsscd was that of the number of neutrino species into which the Z decays, not by the direct observation of the neutrinos, but by Present address: CERN, CH-121 I Geneva 23, Switzerland. 2 Supported by CAICYT, Spain. 3 Supported by the National Science Foundation of China. 4 Permanent address: DESY, D-2000 Hamburg 52, FRG. On leave of absence from SLAC, Stanford, CA 94309, USA. 6 On leave of absence from University of Washington, Seattle, WA 98195, USA. 7 Supported by the Danish Natural Science Research Council. 8 Supported by the UK Science and Engineering Research Council. 9 Supported by SLOAN fellowship, contract BR 2703. ~0 Supported by the US Department of Energy, contract DE-FG05-87ER40319. u Supported by the NSF, contract PHY-8451274. J2 Supported by the US Department of Energy, contract DE-FCOS-85ER250000. ~3 Also at Istituto di Fisica Gcnerale, Universitfi di Torino, Turin, It',dy. ~4 Also at lstituto di Cosmo-Geofisica del CNR, Turin, Italy. ~5 Supported by the Bundcsministerium ffir Forschung und Technologie, FRG. t6 Supported by Fonds zur F6rderung der wisscnschaftlichcn Forschung, Austria. ~7 Supported by the lnstitut de Recherche Fondamcntale du CEA. ~8 Present address: INFN, Sezione di Milano, 1-20133 Milan, Italy. ~9 Permanent address: LBL, Berkeley, CA 94720, USA. 20 Supported by the US Department of Energy, contract DE-AC02-76ER00881.

PY - 1990/2/1

Y1 - 1990/2/1

N2 - More extensive and precise results are reported on the parameters of Z decay. On the basis of 20 000 Z decays collected with the ALEPH detector at LEP we find Mz=91.182±0.026 (exp.) ±0.030 (beam) GeV, Γz=2.541±0.056 GeV and σhad 0=41.4±0.8 nb. The partial widths for the hadronic and leptonic channels are Γhad=1804±44 MeV, Γe+e- =82.1±3.4 MeV, Γμ+μ- =87.9±6.0 MeV and Γτ+τ- =86.1±5.6 MeV, in good agreement with the standard model. On the basis of the average leptonic width Γℓ+ℓ- =83.9±2.2 MeV, the effective weak mixing angle is found to be sin2θw(Mz)=0.231±0.008. Usin g the partial widths calculated in the standard model, the number of light neutrino families is Nν=3.01±0.15 (exp.)±0.05 (theor.).

AB - More extensive and precise results are reported on the parameters of Z decay. On the basis of 20 000 Z decays collected with the ALEPH detector at LEP we find Mz=91.182±0.026 (exp.) ±0.030 (beam) GeV, Γz=2.541±0.056 GeV and σhad 0=41.4±0.8 nb. The partial widths for the hadronic and leptonic channels are Γhad=1804±44 MeV, Γe+e- =82.1±3.4 MeV, Γμ+μ- =87.9±6.0 MeV and Γτ+τ- =86.1±5.6 MeV, in good agreement with the standard model. On the basis of the average leptonic width Γℓ+ℓ- =83.9±2.2 MeV, the effective weak mixing angle is found to be sin2θw(Mz)=0.231±0.008. Usin g the partial widths calculated in the standard model, the number of light neutrino families is Nν=3.01±0.15 (exp.)±0.05 (theor.).

UR - http://www.scopus.com/inward/record.url?scp=3943070974&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=3943070974&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(90)91984-J

DO - 10.1016/0370-2693(90)91984-J

M3 - Article

AN - SCOPUS:3943070974

SN - 0370-2693

VL - 235

SP - 399

EP - 411

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 -

A precise determination of the number of families with light neutrinos and of the Z boson partial widths

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