Measurement of the W mass by direct reconstruction in $e^+ e^-$ collisions at 172 GeV - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles Physics Letters B Year : 1998

Measurement of the W mass by direct reconstruction in $e^+ e^-$ collisions at 172 GeV

R. Barate (1) , S. Jezequel (1) , D. Buskulic (1) , D. Decamp (1) , P. Ghez (1) , C. Goy (1) , J P. Lees (1) , A. Lucotte (1) , M N. Minard (1) , J Y. Nief (1) , B. Pietrzyk (1) , G. Boix , M P. Casado , M. Chmeissani , J M. Crespo , M. Delfino , E. Fernandez , M. Fernandez-Bosman , L. Garrido , E. Graughs , A. Juste , G. Merino , R. Miquel , L M. Mir , P. Morawitz , I C. Park , A. Pascual , J A. Perlas , I. Riu , F. Sanchez , A. Colaleo , M. de Palma , G. Gelao , G. Iaselli , G. Maggi , M. Maggi , A. Ranieri , G. Raso , F. Ruggieri , G. Selvaggi , L. Silvestris , P. Tempesta , A. Tricomi , G. Zito , X. Huang , Jiali Lin , Q. Ouyang , T. Wang , Y. Xie , R. Xu , S. Xue , J. Zhang , L. Zhang , W. Zhao , D. Abbaneo , R. Alemany , U. Becker , P. Bright-Thomas , D. Casper , M. Cattaneo , F. Cerutti , V. Ciulli , G. Dissertori , H. Drevermann , R W. Forty , M. Frank , F. Gianotti , R. Hagelberg , J B. Hansen , J. Harvey , P. Janot , B. Jost , I. Lehraus , P. Mato , A. Minten , L. Moneta , A. Pacheco , J F. Pusztaszeri , F. Ranjard , L. Rolandi , D. Rousseau , D. Schlatter , M. Schmitt , O. Schneider , W. Tejessy , F. Teubert , I R. Tomalin , M. Vreeswijk , H. Wachsmuth , A. Wagner , Ziad Zj Ajaltouni (2) , F. Badaud (2) , G. Chazelle (2) , O. Deschamps (2) , Alain Falvard (2) , C. Ferdi (2) , Pascal Gay (2) , C. Guicheney (2) , Pierre Henrard (2) , J. Jousset (2) , B. Michel (2) , S. Monteil (2) , Jean-Claude Montret (2) , D. Pallin (2) , Pascal Perret (2) , F. Podlyski (2) , Joseph Proriol (2) , P. Rosnet (2) , T. Fearnley , J D. Hansen , J R. Hansen , P H. Hansen , B S. Nilsson , B. Rensch , A. Wddndnen , G. Daskalakis , A. Kyriakis , C. Markou , E. Simopoulou , A. Vayaki , A. Blondel (3) , J C. Brient (3) , F. Machefert (3) , A. Rouge (3) , M. Rumpf (3) , A. Valassi (3) , T. Boccali , E. Focardi , G. Parrini , K. Zachariadou , M. Corden , C. Georgiopoulos , T. Huehn , D E. Jaffe , A. Antonelli , G. Bencivenni , G. Bologna , F. Bossi , P. Campana , G. Capon , V. Chiarella , G. Felici , P. Laurelli , G. Mannocchi , F. Murtas , G P. Murtas , L. Passalacqua , M. Pepi-Altarelli , L. Curtis , J. Dorriss , a W. Halley , J G. Lynch , P. Negus , V. O'Shea , C. Raine , J M. Scarr , K. Smith , P. Teixeira-Dias , a S. Thompson , E. Thomson , F. Thomson , J J. Ward , S. Dhamotharan , C. Geweniger , G. Graefe , P. Hanke , G. Hansper , V. Hepp , E E. Kluge , A. Putzer , J. Sommer , K. Tittel , S. Werner , M. Wunsch , R. Beuselinck , D M. Binnie , W. Cameron , P J. Dornan , M. Girone , S. Goodsir , E B. Martin , N. Marinelli , A. Moutoussi , J. Nash , J K. Sedgbeer , P. Spagnolo , M D. Williams , V M. Ghete , P. Girtler , E. Kneringer , D. Kuhn , G. Rudolph , a P. Betteridge , C K. Bowdery , P G. Buck , P. Colrain , G. Crawford , a J. Finch , F. Foster , G. Hughes , W L. Jonesr , E P. Whelan , M I. Williams , I. Giehl , C. Hoffmann , K. Kleinknecht , G. Quast , B. Renk , E. Rohne , H G. Sander , P. Vangemmeren , C. Zeitnitz , J.J. Aubert (4) , C. Benchouk (4) , A. Bonissent (4) , G. Bujosa (4) , J. Carr (4) , P. Coyle (4) , A. Ealet (4) , D. Fouchez (4) , O. Leroy (4) , F. Motsch (4) , P. Payre (4) , M. Talby (4) , A. Sadouki (4) , M. Thulasidas (4) , Karim Trabelsi (4) , M. Aleppo , M. Antonelli , F. Ragusa , R. Berlich , W. Blum , H. Dietl , G. Ganis , C. Gotzhein , H. Kroha , G. Lutz , C. Mannert , W. Mdnner , H G. Moser , R. Richter , A. Rosado-Schlosser , S. Schael , R. Settles , H. Seywerd , W. Wiedenmann , G. Wolf , J. Boucrot (5) , O. Callot (5) , S. Chen (5) , M. Davier (5) , L. Duflot (5) , J F. Grivaz (5) , P. Heusse (5) , A. Hvcker (5) , A. Jacholkowska (5) , M. Kado (5) , D W. Kim (5) , F. Le Diberder (5) , J. Lefrangois (5) , a M. Lutz (5) , M H. Schune (5) , L. Serin (5) , E. Tournefier (5) , J J. Veillet (5) , I. Videau (5) , D. Zerwas (5) , P. Azzurri (5) , G. Bagliesi , S. Bettarini , C. Bozzi , G. Calderini , R. Dell'Orso , R. Fantechi , I. Ferrante , A. Giassi , A. Gregorio , F. Ligabue , A. Lusiani , P S. Marrocchesi , A. Messineo , F. Palla , G. Rizzo , G. Sanguinetti , G. Sguazzoni , J. Steinberger , R. Tenchini , C. Vannini , A. Venturi , P G. Verdini , G A. Blair , L M. Bryant , J T. Chambers , J. Coles , M G. Green , T. Medcalf , P. Perrodo , J A. Strong , J H. Vonwimmersperg-Toeller , D R. Botterill , R W. Clifft , T R. Edgecock , S. Haywood , P. Maley , P R. Norton , J C. Thompson , a E. Wright , B. Bloch-Devaux , P. Colas , B. Fabbro , G. Faof , E. Langon , C. Lemairem , E. Locci , P. Pirez , H. Przysiezniak , J. Rander , J F. Renardy , A. Rosowsky , A. Roussarie , A. Trabelsi , B. Vallage , S N. Black , J H. Dann , H Y. Kim , N. Konstantinidis , a M. Litke , M A. Mcneil , G. Taylor , C N. Booth , C a J. Brew , S L. Cartwright , F. Combley , M S. Kelly , M H. Lehto , J. Reeve , L F. Thompson , K. Affholderbach , A. Bvhrer , S. Brandt , G D. Cowan , J. Foss , C. Grupen , L. Smolik , F. Stephan , M. Apollonio , L. Bosisio , R. Della Marina , G. Giannini , B. Gobbo , G. Musolino , J. Putz , J E. Rothberg , S. Wasserbaech , R W. Williams , S R. Armstrong , E. Charles , P. Elmer , D Ps. Ferguson , Y. Gao , S. Gonzalez , T C. Greening , O J. Hayes , H. Hu , S. Jin , P A. Mcnamara , J M. Nachtman , J. Nielsen , W. Orejudos , y B. Pan , Y. Saadi , I J. Scott , J. Walsh , S L. Wu , X. Wu , J M. Yamartino , G. Zobernig
C. Goy
G. Boix
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M P. Casado
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Abstract

The mass of the W boson is obtained from reconstructed invariant mass distributions in W-pair events. The sample of W pairs is selected from 10.65~pb$^{-1}$ collected with the ALEPH detector at a mean centre-of-mass energy of 172.09 \GEV. The invariant mass distribution of simulated events are fitted to the experimental distributions and the following W masses are obtained: $WW \to q\overline{q}q\overline{q } m_W = 81.30 +- 0.47(stat.) +- 0.11(syst.) GeV/c^2$, $WW \to l\nu q\overline{q}(l=e,\mu) m_W = 80.54 +- 0.47(stat.) +- 0.11(syst.) GeV/c^2$, $WW \to \tau\nu q\overline{q} m_W = 79.56 +- 1.08(stat.) +- 0.23(syst.) GeV/C62$. The statistical errors are the expected errors for Monte Carlo samples of the same integrated luminosity as the data. The combination of these measurements gives: $m_W = 80.80 +- 0.11(syst.) +- 0.03(LEP energy) GeV/^2$.
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in2p3-00011557 , version 1 (07-01-1999)

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  • HAL Id : in2p3-00011557 , version 1

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R. Barate, S. Jezequel, D. Buskulic, D. Decamp, P. Ghez, et al.. Measurement of the W mass by direct reconstruction in $e^+ e^-$ collisions at 172 GeV. Physics Letters B, 1998, 422, pp.384. ⟨in2p3-00011557⟩
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