Search for the standard model Higgs boson at the LEP2 collider near √s = 183 GeV
R. Barate,Damir Buskulic,D. Décamp,Ph Ghez,Corinne B. Goy,Stephane Jézéquel,Jean Pierre Lees,Arnaud Lucotte,Françoise F. Martin,E. Merle, Marie Noelle Minard,Jean Yves Nief,Pascal Perrodo,Bolek Pietrzyk,Ricard Alemany, M. P. Casado,Mokhtar A. Chmeissani,José M. Crespo,Manuel C. Delfíno,Enrique Fernández,M. Fernandez-Bosman,Ll C. Garrido,Eugeni S. Graugés,Aurelio Juste, Mauricio C. Martínez, G. Merino,Ramon Miquel,Ll M. Mir,Peter P O Morawitz,Alberto J. Pacheco,I. C. Park,Anna Pascual,Imma Riu,Federico A. Sánchez,Anna Colaleo,Donato Creanza,Mauro De Palma,G. Gelao,Giuseppe Iaselli,Giorgio Pietro Maggi,Marcello Maggi,Salvatore Nuzzo,Antonio Ranieri,Giuseppe Raso,Federico Ruggierí,G. Selvaggi,Lucia Silvestris,Piergiulio Tempesta, Alessia Tricomi,Giuseppe Zito,Xiuping Huáng,Jim Lin,Qun Ouyang,Taijie Wang,Yi Xie,Rui Xu,Shengtian Xue,Jian Zhang,Lei Zhang,Wei Zhao,Duccio Abbaneo,Ulrich J. Becker,Gaëlle Boix,Marco Cattaneo,Francesco Cerutti,V. Ciülli,Günther Dissertori,Hans Drevermann,Roger W. Forty,Markus J. Frank,Fabiola Gianotti,R. Hagelberg,A. W. Halley,Jørgen Beck Hansen,Jeffrey A. Harvey,Patrick Janot,Beat Jost,I. Lehraus,Olivier Leroy,P. D. Maley,Pere Mató,A. Minten,Lorenzo Moneta,A. Moutoussi,Florence Ranjard,Luigi Rolandi,David Rousseau,Dieter Schlatter,Michael Schmitt,Olivier Schneider,W. Tejessy,Frederic Teubert,I. R. Tomalin Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics（1999）
摘要
During 1997 the ALEPH experiment at LEP gathered 57 pb-1 of data at centre-of-mass energies near 183 GeV. These data are used to look for possible signals from the production of the Standard Model Higgs boson in the reaction e+e- → HZ. No evidence of a signal is found in the data; seven events are selected, in agreement with the expectation of 7.2 events from background processes. This observation results in an improved lower limit on the mass of the Higgs boson: mH > 87.9 GeV / c2 at 95% confidence level. © 1998 Elsevier Science B.V. All rights reserved.
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