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Measurement of the W boson Mass and Width ine⁺e⁻Collisions at LEP

by Falvard, Alain , Buchmüller, O. , Vayaki, A. , Forty, R.W. , Trocmé, B. , Crespo, J.M. , Badaud, F. , Michel, B. , Nilsson, B.S. , Jézéquel, S. , Brunelière, R. , Mato, P. , Gay, Pascal , Abbaneo, D. , Lin, J. , Hansen, J.D. , Schael, S. , Xie, Y. , de Bonis, I. , Chmeissani, M. , Lees, J.P. , Teubert, F. , Maggi, G. , Barate, R. , Tempesta, P. , Focardi, E. , Iaselli, G. , Pietrzyk, B. , Dessagne, S. , Ranieri, A. , Pallin, D. , Wang, T. , Jousset, J. , Nuzzo, S. , Zhao, W. , Rolandi, L. , Drevermann, H. , Ranjard, F. , Zhang, J. , Brient, J.-C. , Ruggieri, F. , Kraan, A.C. , Raso, G. , Hutchcroft, D.E. , Fernandez-Bosman, M. , Ruiz, H. , Perret, Pascal , Tricomi, A. , Frank, M. , Xu, R. , Janot, P. , Garrido, Ll , Clerbaux, B. , Huang, X. , Blondel, A. , Decamp, D. , Hansen, J.R. , Hansen, P.H. , Fayolle, D. , Kyriakis, A. , Zhang, L. , Ciulli, V. , Minard, M.N. , Markou, C. , Ouyang, Q. , Bravo, S. , Pacheco, A. , Goy, C. , Videau, H. , Cattaneo, M. , Jost, B. , Harvey, J. , Martinez, M. , Creanza, D. , de Filippis, N. , Machefert, F. , Barklow, T. , Zachariadou, K. , Merle, E. , Selvaggi, G. , Videau, I. , Valassi, A. , Martin, F. , Fernandez, E. , Pascolo, J M. , Maggi, M. , Hansen, J.B. , Schlatter, D. , Rougé, A. , de Palma, M. , Simopoulou, E

in High Energy Physics - Experiment / Physics

2006

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Measurement of the W boson Mass and Width ine⁺e⁻Collisions at LEP

in High Energy Physics - Experiment / Physics

2006

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Measurement of the W boson Mass and Width ine⁺e⁻Collisions at LEP

in High Energy Physics - Experiment / Physics

2006

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Journal Article

Measurement of the W boson Mass and Width ine⁺e⁻Collisions at LEP

Falvard, Alain,

Buchmüller, O.,

Vayaki, A.,

Forty, R.W.,

Trocmé, B.,

Crespo, J.M.,

Badaud, F.,

Michel, B.,

Nilsson, B.S.,

Jézéquel, S.,

Brunelière, R.,

Mato, P.,

Gay, Pascal,

Abbaneo, D.,

Lin, J.,

Hansen, J.D.,

Schael, S.,

Xie, Y.,

de Bonis, I.,

Chmeissani, M.,

Lees, J.P.,

Teubert, F.,

Maggi, G.,

Barate, R.,

Tempesta, P.,

Focardi, E.,

Iaselli, G.,

Pietrzyk, B.,

Dessagne, S.,

Ranieri, A.,

Pallin, D.,

Wang, T.,

Jousset, J.,

Nuzzo, S.,

Zhao, W.,

Rolandi, L.,

Drevermann, H.,

Ranjard, F.,

Zhang, J.,

Brient, J.-C.,

Ruggieri, F.,

Kraan, A.C.,

Raso, G.,

Hutchcroft, D.E.,

Fernandez-Bosman, M.,

Ruiz, H.,

Perret, Pascal,

Tricomi, A.,

Frank, M.,

Xu, R.,

Janot, P.,

Garrido, Ll,

Clerbaux, B.,

Huang, X.,

Blondel, A.,

Decamp, D.,

Hansen, J.R.,

Hansen, P.H.,

Fayolle, D.,

Kyriakis, A.,

Zhang, L.,

Ciulli, V.,

Minard, M.N.,

Markou, C.,

Ouyang, Q.,

Bravo, S.,

Pacheco, A.,

Goy, C.,

Videau, H.,

Cattaneo, M.,

Jost, B.,

Harvey, J.,

Martinez, M.,

Creanza, D.,

de Filippis, N.,

Machefert, F.,

Barklow, T.,

Zachariadou, K.,

Merle, E.,

Selvaggi, G.,

Videau, I.,

Valassi, A.,

Martin, F.,

Fernandez, E.,

Pascolo, J M.,

Maggi, M.,

Hansen, J.B.,

Schlatter, D.,

Rougé, A.,

de Palma, M.,

Simopoulou, E

2006

Overview

The mass of the W boson is determined from the direct reconstruction of its decays into purely hadronic and semi-leptonic events in e+e- collisions at LEP. The data sample corresponds to an integrated luminosity of 683 inverse picobarns collected with the ALEPH detector at centre-of-mass energies up to 209 GeV. To minimise any effect from colour reconnection a new procedure is adopted in which low energy particles are not considered in the mass determination from the purely hadronic channel. The combined result from all channels is Mw = 80.440+-0.043(stat.)+-0.024(syst.)+-0.009(FSI)+-0.009(LEP) GeV/c**2 where FSI represents the possible effects of final state interactions in the purely hadronic channel. From two-parameter fits to the W mass and width, the W width is found to be Gw = 2.14+-0.09(stat.)+-0.04(syst.)+-0.05(FSI)+-0.01(LEP) GeV

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Publisher

Springer Verlag (Germany)

Subject

High Energy Physics - Experiment

/ Physics