2024-03-29T01:23:55Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1092622018-06-25T11:36:11Zcom_10261_61com_10261_4com_10261_37col_10261_314col_10261_290
2015-01-12T12:05:43Z
urn:hdl:10261/109262
Electroweak measurements in electron-positron collisions at W-boson-pair energies at LEP
Fernández Menéndez, Javier
Gómez-Ceballos, Guillelmo
Marco, Jesús
Marco, Rafael
Martínez-Rivero, Celso
Matorras, Francisco
Piedra, Jonatan
Rivero, M.
Rodríguez, David
Costa, María José
Ferrer, Antonio
Fuster, Juan
García García, Carmen
Oyanguren, Arantza
Perepelitsa, Vassil
Salt, José
Tortosa, Pablo
Department of Energy (US)
National Science Foundation (US)
Science and Technology Facilities Council (UK)
Natural Sciences and Engineering Research Council of Canada
Israel Science Foundation
Ministry of Education, Culture, Sports, Science and Technology (Japan)
Japan Society for the Promotion of Science
German-Israeli Foundation for Scientific Research and Development
Federal Ministry of Education and Research (Germany)
National Research Council of Canada
North Atlantic Treaty Organization
Electron–positron physics
Decays of heavy intermediate gauge bosons
Electroweak interactions
The ALEPH, DELPHI, L3, OPAL collaborations and LEP Electroweak Working Group.-- arXiv:1302.3415
Electroweak measurements performed with data taken at the electron-positron collider LEP at CERN from 1995 to 2000 are reported. The combined data set considered in this report corresponds to a total luminosity of about 3 fb-1 collected by the four LEP experiments ALEPH, DELPHI, L3 and OPAL, at centre-of-mass energies ranging from 130 GeV to 209 GeV. Combining the published results of the four LEP experiments, the measurements include total and differential cross-sections in photon-pair, fermion-pair and four-fermion production, the latter resulting from both double-resonant W W and Z Z production as well as singly resonant production. Total and differential cross-sections are measured precisely, providing a stringent test of the Standard Model at centre-of-mass energies never explored before in electron-positron collisions. Final-state interaction effects in four-fermion production, such as those arising from colour reconnection and Bose-Einstein correlations between the two W decay systems arising in W W production, are searched for and upper limits on the strength of possible effects are obtained. The data are used to determine fundamental properties of the W boson and the electroweak theory. Among others, the mass and width of the W boson, mW and ΓW, the branching fraction of W decays to hadrons, B (W → had), and the trilinear gauge-boson self-couplings g1 Z, κγ and λγ are determined to be: mW=80.376±0.033 GeV ΓW=2.195±0.083 GeV B(W→had)=67.41±0.27% g1 Z=0.9840+0.018 -0.020 κγ=0.982±0.042λγ=-0.022±0.019.
2015-01-12T12:05:43Z
2015-01-12T12:05:43Z
2013-11-30
2015-01-12T12:05:43Z
artículo
Physics Reports 532(4): 119-244 (2013)
http://hdl.handle.net/10261/109262
10.1016/j.physrep.2013.07.004
http://dx.doi.org/10.13039/100000001
http://dx.doi.org/10.13039/501100000271
http://dx.doi.org/10.13039/501100000038
http://dx.doi.org/10.13039/501100003977
http://dx.doi.org/10.13039/501100001700
http://dx.doi.org/10.13039/501100001691
http://dx.doi.org/10.13039/501100001736
http://dx.doi.org/10.13039/501100002347
http://dx.doi.org/10.13039/501100000046
http://dx.doi.org/10.13039/100004415
http://dx.doi.org/10.13039/100000015
eng
Preprint
http://dx.doi.org/10.1016/j.physrep.2013.07.004
openAccess
Elsevier