A study of radiative muon-pair events at Z0 energies and limits on an additional Z′ gauge beson

P. Abreu;W. Adam;T. Adye;E. Agasi;I. Ajinenko;R. Aleksan;G. Alekseev;P. Allport;S. Almehed;F. Almeida;S. J. Alvsvaag;U. Amaldi;A. Andreazza;P. Antilogus;W. Apel;R. Apsimon;Y. Arnoud;B. Åsman;J. Augustin;A. Augustinus;P. Baillon;P. Bambade;F. Barão;R. Barate;D. Bardin;G. Barker;A. Baroncelli;O. Barring;J. Barrio;W. Bartl;M. Bates;M. Battaglia;M. Baubillier;J. Baudot;K. Becks;M. Begalli;P. Beillière;P. Beltran;A. Benvenuti;M. Berggren;D. Bertrand;D. Bertrand;F. Bianchi;M. Bigi;M. Bilenky;P. Billoir;J. Bjarne;D. Bloch;J. Błocki;S. Blyth;V. Bocci;P. N. Bogolubov;T. Bolognese;M. Bonesini;W. Bonivento;P. Boóth;G. Borisov;C. Bosio;B. Bostjancic;S. Bosworth;O. Botner;E. Boudinov;B. Bouquet;C. Bourdarios;T. Bowcock;M. Bozzo;S. Braibant;S. Braibant;P. Branchini;K. Brand;R. Brenner;H. Briand;C. Bricman;C. Bricman;L. Brillault;R. Brown;J. Brunet;L. Bugge;T. Buran;A. Buys;J. Buytaert;M. Caccia;M. Calvi;A. Rozas;R. Campion;T. Camporesi;V. Capale;K. Cankocak;F. Cao;F. Cao;F. Carena;P. Carrilho;L. Carroll;R. Cases;C. Caso;M. Gimenez;A. Cattai;F. Cavallo;L. Cerrito;V. Chabaud;A. Chan;M. Chapkin;P. Charpentier;L. Chaussard;J. Chauveau;P. Checchia;G. Chelkov;P. Chliapnikov;V. Chorowicz;J. Chrin;V. Cindro;P. Collins;J. Contreras;R. Contri;E. Cortina;G. Cosme;G. Cosmo;G. Cosmo;C. Cossutti;C. Cossutti;F. Couchot;H. Crawley;D. Crennell;G. Crosetti;J. Maestro;S. Czellár;E. Dahl-Jensen;J. Dahm;B. Dalmagne;M. Dam;G. Damgaard;E. Daubie;E. Daubie;A. Daum;P. Dauncey;M. Davenport;J. Davies;W. Silva;C. Defoix;P. Delpierre;N. Demaria;A. Angelis;H. Boeck;H. Boeck;W. Boer;S. Brabandere;S. Brabandere;C. Clercq;C. Clercq;M. Laso;C. Vaissière;B. Lotto;B. Lotto;A. Min;L. Paula;C. Saint-Jean;H. Diikstra;L. Ciaccio;F. Diama;J. Dolbeau;M. Donszelmann;K. Doroba;M. Dracos;J. Drees;M. Dris;Y. Dufour;F. Dupont;D. Edsall;R. Ehret;T. Ekelof;G. Ekspong;M. Elsing;J. Engel;N. Ershaidat;M. Santo;D. Fassouliotis;M. Feindt;A. Fenyuk;A. Ferrer;T. Filippas;A. Firestone;H. Foeth;E. Fokitis;F. Fontanelli;F. 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