Title
Measurement of the ZZ cross-section in e+e- interactions at 183-189 GeV
Date Issued
11 January 2001
Access level
open access
Resource Type
journal article
Author(s)
Abreu P.
Adam W.
Adye T.
Adzic P.
Ajinenko I.
Albrecht Z.
Alderweireld T.
Alekseev G.D.
Alemany R.
Allmendinger T.
Allport P.P.
Almehed S.
Amaldi U.
Amapane N.
Amato S.
Anassontzis E.G.
Andersson P.
Andreazza A.
Andringa S.
Antilogus P.
Apel W.D.
Arnoud Y.
Åsman B.
Augustin J.E.
Augustinus A.
Baillon P.
Ballestrero A.
Bambade P.
Barao F.
Barbiellini G.
Barbier R.
Bardin D.Y.
Barker G.
Baroncelli A.
Battaglia M.
Baubillier M.
Becks K.H.
Begalli M.
Behrmann A.
Beilliere P.
Belokopytov Y.
Benekos N.C.
Benvenuti A.C.
Berat C.
Berggren M.
Berntzon L.
Bertrand D.
Besancon M.
Bilenky M.S.
Bizouard M.A.
Bloch D.
Blom H.M.
Bonesini M.
Boonekamp M.
Booth P.S.L.
Borisov G.
Bosio C.
Botner O.
Boudinov E.
Bouquet B.
Bourdarios C.
Bowcock T.J.V.
Boyko I.
Bozovic I.
Bozzo M.
Bracko M.
Branchini P.
Brenner R.A.
Bruckman P.
Brunet J.M.
Bugge L.
Buran T.
Buschmann P.
Cabrera S.
Caccia M.
Calvi M.
Camporesi T.
Canale V.
Carena F.
Carroll L.
Caso C.
Castillo Gimenez M.V.
Cattai A.
Cavallo F.R.
Charpentier P.
Checchia P.
Chelkov G.A.
Chierici R.
Chliapnikov P.
Chochula P.
Chorowicz V.
Chudoba J.
Cieslik K.
Collins P.
Contri R.
Cortina E.
Cosme G.
Cossutti F.
Costa M.
Crawley H.B.
Publisher(s)
Elsevier B.V.
Abstract
Measurements of on-shell ZZ production are described, using data collected by DELPHI in 1997 and 1998, at centre-of-mass energies √s = 182.6 GeV and 188.6 GeV, respectively. Results obtained in each of the final states qq̄qq̄, μ+μ-qq̄, e+e-qq̄, vv̄qq̄ l+l-l+l-, and vv̄l+l- are presented. The measured cross-sections for on-shell ZZ production via the tree-level doubly-resonant graphs (NC02) are: σNC02 (182.6 GeV) = 0.38 ± 0.18 (stat) ± 0.04 (syst) pb, σNC02 (188.6 GeV) = 0.60±0.13 (stat) ±0.07 (syst) pb. They are consistent with the Standard Model expectations of 0.25 and 0.65 pb at each energy. © 2001 Elsevier Science B.V.
Start page
199
End page
213
Volume
497
Issue
April 3
Language
English
OCDE Knowledge area
Física nuclear
Física de partículas, Campos de la Física
Scopus EID
2-s2.0-0035843213
Source
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ISSN of the container
03702693
Sponsor(s)
We are greatly indebted to our technical collaborators, to the members of the CERN-SL Division for the excellent performance of the LEP collider, and to the funding agencies for their support in building and operating the DELPHI detector. We acknowledge in particular the support of Austrian Federal Ministry of Science and Traffics, GZ 616.364/2-III/2a/98; FNRS-FWO, Flanders Institute to encourage scientific and technological research in the industry (IWT), Belgium; FINEP, CNPq, CAPES, FUJB and FAPERJ, Brazil; Czech Ministry of Industry and Trade, GA CR 202/96/0450 and GA AVCR A1010521; Danish Natural Research Council; Commission of the European Communities (DG XII); Direction des Sciences de la Matière, CEA, France; Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie, Germany; General Secretariat for Research and Technology, Greece; National Science Foundation (NWO) and Foundation for Research on Matter (FOM), The Netherlands; Norwegian Research Council; State Committee for Scientific Research, Poland, 2P03B06015, 2P03B11116 and SPUB/P03/ DZ3/99; JNICT — Junta Nacional de Investigação Cientı́fica e Tecnológica, Portugal; Vedecka grantova agentura MS SR, Slovakia, Nr. 95/5195/134; Ministry of Science and Technology of the Republic of Slovenia; CICYT, Spain, AEN96-1661 and AEN96-1681; The Swedish Natural Science Research Council; Particle Physics and Astronomy Research Council, UK; Department of Energy, USA, DE-FG02-94ER40817.
Sources of information:
Directorio de Producción Científica
Scopus