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Measurement and interpretation of the W-pair cross-section in $e^+ e^-$ interactions at 161 GeV

In 1996 LEP ran at a centre-of-mass energy of 161~GeV, just above the threshold of W-pair production. DELPHI accumulated data corresponding to an integrated luminosity of $9.93 {\mathrm{~pb^{-1}}}$, and observed 29 events that are considered as candidates for W-pair production. From these, a cross-s...

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Detalles Bibliográficos
Autores principales: Abreu, P, Adam, W, Adye, T, Adzic, P, Ajinenko, I, Alekseev, G D, Alemany, R, Allport, P P, Almehed, S, Amaldi, Ugo, Amato, S, Andreazza, A, Andrieux, M L, Antilogus, P, Apel, W D, Åsman, B, Augustin, J E, Augustinus, A, Baillon, Paul, Bambade, P, Barão, F, Barbi, M S, Bardin, Dimitri Yuri, Barker, G, Baroncelli, A, Bärring, O, Barrio, J A, Bartl, Walter, Bates, M J, Battaglia, Marco, Baubillier, M, Baudot, J, Becks, K H, Begalli, M, Beillière, P, Belokopytov, Yu A, Belous, K S, Benvenuti, Alberto C, Berggren, M, Bertini, D, Bertrand, D, Besançon, M, Bianchi, F, Bigi, M, Bilenky, S M, Billoir, P, Bizouard, M A, Bloch, D, Blume, M, Bolognese, T, Bonesini, M, Bonivento, W, Booth, P S L, Bosio, C, Botner, O, Boudinov, E, Bouquet, B, Bourdarios, C, Bowcock, T J V, Bozzo, M, Branchini, P, Brand, K D, Brenke, T, Brenner, R A, Bricman, C, Brown, R C A, Brückman, P, Brunet, J M, Bugge, L, Buran, T, Burgsmüller, T, Buschmann, P, Cabrera, S, Caccia, M, Calvi, M, Camacho-Rozas, A J, Camporesi, T, Canale, V, Canepa, M, Cankocak, K, Cao, F, Carena, F, Carroll, L, Caso, Carlo, Castillo-Gimenez, M V, Cattai, A, Cavallo, F R, Chabaud, V, Charpentier, P, Chaussard, L, Checchia, P, Chelkov, G A, Chen, M, Chierici, R, Chliapnikov, P V, Chochula, P, Chorowicz, V, Chudoba, J, Cindro, V, Collins, P, Contri, R, Cortina, E, Cosme, G, Cossutti, F, Cowell, J H, Crawley, H B, Crennell, D J, Crosetti, G, Cuevas-Maestro, J, Czellar, S, Dahl-Jensen, Erik, Dahm, J, D'Almagne, B, Dam, M, Damgaard, G, Dauncey, P D, Davenport, Martyn, Da Silva, W, Defoix, C, Deghorain, A, Della Ricca, G, Delpierre, P A, Demaria, N, De Angelis, A, de Boer, Wim, De Brabandere, S, De Clercq, C, La Vaissière, C de, De Lotto, B, De Min, A, De Paula, L S, De Saint-Jean, C, Dijkstra, H, Di Ciaccio, Lucia, Di Diodato, A, Djannati, A, Dolbeau, J, Doroba, K, Dracos, M, Drees, J, Drees, K A, Dris, M, Durand, J D, Edsall, D M, Ehret, R, Eigen, G, Ekelöf, T J C, Ekspong, Gösta, Elsing, M, Engel, 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Weilhammer, Peter, Weiser, C, Wetherell, Alan M, Wicke, D, Wickens, J H, Wielers, M, Wilkinson, G R, Williams, W S C, Winter, M, Witek, M, Wlodek, T, Woschnagg, K, Yip, K, Yushchenko, O P, Zach, F, Zaitsev, A, Zalewska-Bak, A, Zalewski, Piotr, Zavrtanik, D, Zevgolatakos, E, Zimin, N I, Zito, M, Zontar, D, Zucchelli, G C, Zumerle, G
Lenguaje:eng
Publicado: 1997
Materias:
Acceso en línea:https://dx.doi.org/10.1016/S0370-2693(97)00226-8
http://cds.cern.ch/record/319826
Descripción
Sumario:In 1996 LEP ran at a centre-of-mass energy of 161~GeV, just above the threshold of W-pair production. DELPHI accumulated data corresponding to an integrated luminosity of $9.93 {\mathrm{~pb^{-1}}}$, and observed 29 events that are considered as candidates for W-pair production. From these, a cross-section for the doubly resonant $e^+e^-\to\mathrm{WW}$ process of $3.67~^{+0.97}_{-0.85} \pm 0.19{\mathrm{~pb}}$ has been measured. Within the Standard Model, this cross-section corresponds to a mass of the W-boson of ${\mathrm{80.40~\pm~0.44~(stat.)~\pm~0.09~(syst.) ~\pm 0.03~(LEP)~GeV}}/c^2$. Alternatively, if $m_{\mathrm{W}}$ is held fixed at its current value determined by other experiments, the observed cross-section is used to obtain limits on trilinear ${\mathrm{WWV (V \equiv \gamma, Z)}}$ couplings.