Determination of an upper limit for the mass of the τ-neutrino at LEP - Zeitschrift für Physik C Particles and Fields

Clicks: 188
ID: 268271
1970
An upper limit for theν τ mass is determined through the kinematic reconstruction of the decayτ→5π ± ν τ in the OPAL detector at LEP. The limit is obtained using a new method based on the comparison of the two-dimensional distribution of energy and invariant mass of the five-pion system with expectations from different neutrino mass hypotheses. From a sample of five events surviving the selection criteria we obtain an upper limit of 74 MeV at 95% confidence level. It is the first measurement at LEP energies, where the larger average multiplicity of $$e^ + e^ - \to q\bar q$$ events makes the suppression of this background more robust compared to lower energies.
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Authors R. Akers;G. Alexander;J. Allison;K. J. Anderson;S. Arcelli;S. Asai;A. Astbury;D. Axen;G. Azuelos;A. H. Ball;E. Barberio;R. J. Barlow;R. Bartoldus;J. R. Batley;G. Beaudoin;A. Beck;G. A. Beck;J. Becker;C. Beeston;T. Behnke;K. W. Bell;G. Bella;P. Bentkowski;S. Bentvelsen;P. Berlich;S. Bethke;O. Biebel;I. J. Bloodworth;P. Bock;H. M. Bosch;M. Boutemeur;S. Braibant;P. Bright-Thomas;R. M. Brown;A. Buijs;H. J. Burckhart;C. Burgard;P. Capiluppi;R. K. Carnegie;A. A. Carter;J. R. Carter;C. Y. Chang;C. Charlesworth;D. G. Charlton;S. L. Chu;P. E. L. Clarke;J. C. Clayton;S. G. Clowes;I. Cohen;J. E. Conboy;M. Coupland;M. Cuffiani;S. Dado;C. Dallapiccola;G. M. Dallavalle;C. Darling;S. De Jong;H. Deng;M. Dittmar;M. S. Dixit;E. do Couto e Silva;J. E. Duboscq;E. Duchovni;G. Duckeck;I. P. Duerdoth;U. C. Dunwoody;P. A. Elcombe;P. G. Estabrooks;E. Etzion;H. G. Evans;F. Fabbri;B. Fabbro;M. Fanti;M. Fierro;M. Fincke-Keeler;H. M. Fischer;P. Fischer;R. Folman;D. G. Fong;M. Foucher;H. Fukui;A. Fürtjes;P. Gagnon;A. Gaidot;J. W. Gary;J. Gascon;N. I. Geddes;C. Geich-Gimbel;S. W. Gensler;F. X. Gentit;T. Geralis;G. Giacomelli;P. Giacomelli;R. Giacomelli;V. Gibson;W. R. Gibson;J. D. Gillies;J. Goldberg;D. M. Gingrich;M. J. Goodrick;W. Gorn;C. Grandi;P. Grannis;E. Gross;J. Hagemann;G. G. Hanson;M. Hansroul;C. K. Hargrove;J. Hart;P. A. Hart;M. Hauschild;C. M. Hawkes;E. Heflin;R. J. Hemingway;G. Herten;R. D. Heuer;J. C. Hill;S. J. Hillier;T. Hilse;D. A. Hinshaw;P. R. Hobson;D. Hochman;A. Höcker;R. J. Homer;A. K. Honma;R. Howard;R. E. Hughes-Jones;R. Humbert;P. Igo-Kemenes;H. Ihssen;D. C. Imrie;A. Jawahery;P. W. Jeffreys;H. Jeremie;M. Jimack;M. Jones;R. W. L. Jones;P. Jovanovic;C. Jui;D. Karlen;K. Kawagoe;T. Kawamoto;R. K. Keeler;R. G. Kellogg;B. W. Kennedy;B. King;J. King;S. Kluth;T. Kobayashi;M. Kobel;D. S. Koetke;T. P. Kokott;S. Komamiya;R. Kowalewski;P. Krieger;J. von Krogh;P. Kyberd;G. D. Lafferty;H. Lafoux;R. Lahmann;I. Lauber;J. G. Layter;P. Leblanc;P. Le Du;A. M. Lee;E. Lefebvre;M. H. Lehto;D. Lellouch;C. Leroy;J. Letts;L. Levinson;Z. Li;F. Liu;S. L. Lloyd;F. K. Loebinger;G. D. Long;B. Lorazo;M. J. Losty;X. C. Lou;J. Ludwig;A. Luig;M. Mannelli;S. Marcellini;C. Markus;A. J. Martin;J. P. Martin;T. Mashimo;P. Mättig;U. Maur;J. McKenna;T. J. McMahon;A. I. McNab;J. R. McNutt;F. Meijers;F. S. Merritt;H. Mes;A. Michelini;R. P. Middleton;G. Mikenberg;J. Mildenberger;D. J. Miller;R. Mir;W. Mohr;C. Moisan;A. Montanari;T. Mori;M. Morii;U. Müller;B. Nellen;B. Nijjhar;S. W. O'Neale;F. G. Oakham;F. Odorici;H. O. Ogren;C. J. Oram;M. J. Oreglia;S. Orito;J. P. Pansart;G. N. Patrick;M. J. Pearce;P. Pfister;P. D. Phillips;J. E. Pilcher;J. Pinfold;D. Pitman;D. E. Plane;P. Poffenberger;B. Poli;A. Posthaus;T. W. Pritchard;H. Przysiezniak;M. W. Redmond;D. L. Rees;D. Rigby;M. Rison;S. A. Robins;D. Robinson;J. M. Roney;E. Ros;S. Rossberg;A. M. Rossi;M. Rosvick;P. Routenburg;Y. Rozen;K. Runge;O. Runolfsson;D. R. Rust;M. Sasaki;C. Sbarra;A. D. Schaile;O. Schaile;F. Scharf;P. Scharff-Hansen;P. Schenk;B. Schmitt;H. von der Schmitt;M. Schröder;H. C. Schultz-Coulon;P. Schütz;M. Schulz;C. Schwick;J. Schwiening;W. G. Scott;M. Settles;T. G. Shears;B. C. Shen;C. H. Shepherd-Themistocleous;P. Sherwood;G. P. Siroli;A. Skillman;A. Skuja;A. M. Smith;T. J. Smith;G. A. Snow;R. Sobie;R. W. Springer;M. Sproston;A. Stahl;C. Stegmann;K. Stephens;J. Steuerer;B. Stockhausen;R. Ströhmer;D. Strom;P. Szymanski;H. Takeda;T. Takeshita;S. Tarem;M. Tecchio;P. Teixeira-Dias;N. Tesch;M. A. Thomson;S. Towers;T. Tsukamoto;M. F. Turner-Watson;D. Van den plas;R. Van Kooten;G. Vasseur;M. Vincter;A. Wagner;D. L. Wagner;C. P. Ward;D. R. Ward;J. J. Ward;P. M. Watkins;A. T. Watson;N. K. Watson;P. Weber;P. S. Wells;N. Wermes;B. Wilkens;G. W. Wilson;J. A. Wilson;V-H. Winterer;T. Wlodek;G. Wolf;S. Wotton;T. R. Wyatt;A. Yeaman;G. Yekutieli;M. Yurko;W. Zeuner;G. T. Zorn;R. Akers;G. Alexander;J. Allison;K. J. Anderson;S. Arcelli;S. Asai;A. Astbury;D. Axen;G. Azuelos;A. H. Ball;E. Barberio;R. J. Barlow;R. Bartoldus;J. R. Batley;G. Beaudoin;A. Beck;G. A. Beck;J. Becker;C. Beeston;T. Behnke;K. W. Bell;G. Bella;P. Bentkowski;S. Bentvelsen;P. Berlich;S. Bethke;O. Biebel;I. J. Bloodworth;P. Bock;H. M. Bosch;M. Boutemeur;S. Braibant;P. Bright-Thomas;R. M. Brown;A. Buijs;H. J. Burckhart;C. Burgard;P. Capiluppi;R. K. Carnegie;A. A. Carter;J. R. Carter;C. Y. Chang;C. Charlesworth;D. G. Charlton;S. L. Chu;P. E. L. Clarke;J. C. Clayton;S. G. Clowes;I. Cohen;J. E. Conboy;M. Coupland;M. Cuffiani;S. Dado;C. Dallapiccola;G. M. Dallavalle;C. Darling;S. De Jong;H. Deng;M. Dittmar;M. S. Dixit;E. do Couto e Silva;J. E. Duboscq;E. Duchovni;G. Duckeck;I. P. Duerdoth;U. C. Dunwoody;P. A. Elcombe;P. G. Estabrooks;E. Etzion;H. G. Evans;F. Fabbri;B. Fabbro;M. Fanti;M. Fierro;M. Fincke-Keeler;H. M. Fischer;P. Fischer;R. Folman;D. G. Fong;M. Foucher;H. Fukui;A. Fürtjes;P. Gagnon;A. Gaidot;J. W. Gary;J. Gascon;N. I. Geddes;C. Geich-Gimbel;S. W. Gensler;F. X. Gentit;T. Geralis;G. Giacomelli;P. Giacomelli;R. Giacomelli;V. Gibson;W. R. Gibson;J. D. Gillies;J. Goldberg;D. M. Gingrich;M. J. Goodrick;W. Gorn;C. Grandi;P. Grannis;E. Gross;J. Hagemann;G. G. Hanson;M. Hansroul;C. K. Hargrove;J. Hart;P. A. Hart;M. Hauschild;C. M. Hawkes;E. Heflin;R. J. Hemingway;G. Herten;R. D. Heuer;J. C. Hill;S. J. Hillier;T. Hilse;D. A. Hinshaw;P. R. Hobson;D. Hochman;A. Höcker;R. J. Homer;A. K. Honma;R. Howard;R. E. Hughes-Jones;R. Humbert;P. Igo-Kemenes;H. Ihssen;D. C. Imrie;A. Jawahery;P. W. Jeffreys;H. Jeremie;M. Jimack;M. Jones;R. W. L. Jones;P. Jovanovic;C. Jui;D. Karlen;K. Kawagoe;T. Kawamoto;R. K. Keeler;R. G. Kellogg;B. W. Kennedy;B. King;J. King;S. Kluth;T. Kobayashi;M. Kobel;D. S. Koetke;T. P. Kokott;S. Komamiya;R. Kowalewski;P. Krieger;J. von Krogh;P. Kyberd;G. D. Lafferty;H. Lafoux;R. Lahmann;I. Lauber;J. G. Layter;P. Leblanc;P. Le Du;A. M. Lee;E. Lefebvre;M. H. Lehto;D. Lellouch;C. Leroy;J. Letts;L. Levinson;Z. Li;F. Liu;S. L. Lloyd;F. K. Loebinger;G. D. Long;B. Lorazo;M. J. Losty;X. C. Lou;J. Ludwig;A. Luig;M. Mannelli;S. Marcellini;C. Markus;A. J. Martin;J. P. Martin;T. Mashimo;P. Mättig;U. Maur;J. McKenna;T. J. McMahon;A. I. McNab;J. R. McNutt;F. Meijers;F. S. Merritt;H. Mes;A. Michelini;R. P. Middleton;G. Mikenberg;J. Mildenberger;D. J. Miller;R. Mir;W. Mohr;C. Moisan;A. Montanari;T. Mori;M. Morii;U. Müller;B. Nellen;B. Nijjhar;S. W. O'Neale;F. G. Oakham;F. Odorici;H. O. Ogren;C. J. Oram;M. J. Oreglia;S. Orito;J. P. Pansart;G. N. Patrick;M. J. Pearce;P. Pfister;P. D. Phillips;J. E. Pilcher;J. Pinfold;D. Pitman;D. E. Plane;P. Poffenberger;B. Poli;A. Posthaus;T. W. Pritchard;H. Przysiezniak;M. W. Redmond;D. L. Rees;D. Rigby;M. Rison;S. A. Robins;D. Robinson;J. M. Roney;E. Ros;S. Rossberg;A. M. Rossi;M. Rosvick;P. Routenburg;Y. Rozen;K. Runge;O. Runolfsson;D. R. Rust;M. Sasaki;C. Sbarra;A. D. Schaile;O. Schaile;F. Scharf;P. Scharff-Hansen;P. Schenk;B. Schmitt;H. von der Schmitt;M. Schröder;H. C. Schultz-Coulon;P. Schütz;M. Schulz;C. Schwick;J. Schwiening;W. G. Scott;M. Settles;T. G. Shears;B. C. Shen;C. H. Shepherd-Themistocleous;P. Sherwood;G. P. Siroli;A. Skillman;A. Skuja;A. M. Smith;T. J. Smith;G. A. Snow;R. Sobie;R. W. Springer;M. Sproston;A. Stahl;C. Stegmann;K. Stephens;J. Steuerer;B. Stockhausen;R. Ströhmer;D. Strom;P. Szymanski;H. Takeda;T. Takeshita;S. Tarem;M. Tecchio;P. Teixeira-Dias;N. Tesch;M. A. Thomson;S. Towers;T. Tsukamoto;M. F. Turner-Watson;D. Van den plas;R. Van Kooten;G. Vasseur;M. Vincter;A. Wagner;D. L. Wagner;C. P. Ward;D. R. Ward;J. J. Ward;P. M. Watkins;A. T. Watson;N. K. Watson;P. Weber;P. S. Wells;N. Wermes;B. Wilkens;G. W. Wilson;J. A. Wilson;V-H. Winterer;T. Wlodek;G. Wolf;S. Wotton;T. R. Wyatt;A. Yeaman;G. Yekutieli;M. Yurko;W. Zeuner;G. T. Zorn;
Journal Zeitschrift für Physik C Particles and Fields
Year 1970
DOI doi:10.1007/BF01571874
URL
https://doi.org/10.1007/bf01571874
Keywords
string theory quantum field theory elementary particles nuclear physics heavy ions hadrons quantum field theories

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