Measurement and Interpretation of Fermion-Pair Production at LEP Energies of 183 and 189 GeV

  title={Measurement and Interpretation of Fermion-Pair Production at LEP Energies of 183 and 189 GeV},
  author={Waldemar Adam and T. Adye and P R Adzi{\'c} and Z. Albrecht and T. Alderweireld and G. Alekseev and Ricard Alemany and Thomas Allmendinger and P. P. Allport and S. Almehed and U. Amaldi and N. Amapane and S. Amato and E. G. Anassontzis and Per F. Andersson and Attilio Andreazza and Sofia Andringa and Pierre Antilogus and W-D. Apel and Y. Arnoud and B. {\AA}sman and J-E. Augustin and A. Augustinus and P. H. Baillon and Alessandro Ballestrero and Philip Bambade and Fernando Bar{\~a}o and Guido Barbiellini and R{\'e}mi Barbier and D. Yu. Bardin and Gareth J. Barker and Antonio Baroncelli and Marco Battaglia and M{\'e}lanie Baubillier and K-H. Becks and M{\'a}rcia Begalli and Abraham S Behrmann and P. Beilliere and Yu. Belokopytov and K. S. Belous and Nektarios Chr. Benekos and A. C. Benvenuti and Corinne B{\'e}rat and Mikael Berggren and Lotta Berntzon and D. Bertrand and Marc Besançon and Mikhail Bilenky and M-A. Bizouard and Debbie Bloch and Henk M Blom and M. Bonesini and M. Boonekamp and P. S. L. Booth and Galin Borisov and Christopher Bosio and Olga Botner and Edouard R. Boudinov and Benjamin Bouquet and C. Bourdarios and T. Bowcock and I V Boyko and I Bo{\vz}ovi{\'c} and Mary Bozzo and M. Bracko and Paolo Branchini and Ruth A. Brenner and P. Bruckman and J-M. Brunet and L. Bugge and Tahir Buran and Britta Buschbeck and Peter Buschmann and Susana Cabrera and Mario Riccardo Caccia and Marta Calvi and T. Camporesi and Vincenzo Canale and Franco Carena and L. Van Carroll and Covadonga Caso and M. V. Castillo Gimenez and A. P. Cattai and Francesco Cavallo and M. Chapkin and P. Charpentier and Paolo Checchia and Georgy A. Chelkov and Roberto Chierici and P. V. Chliapnikov and P. Chochula and V. Chorowicz and Jan Chudoba and Krzysztof Cieślik and Pat Collins and Rachele Contri and Eduardo Loza Cortina and G. Cosme and Fabio Cossutti and Maria Jo{\~a}o Costa and H. Bert Crawley and D. Crennell and G. Crosetti and J. Cuevas Maestro and S. Czellar and Jorgen D’Hondt and Joseba Dalmau and Melanie Davenport and William D. A. B. da Silva and G. Della Ricca and P. Delpierre and Natale Demaria and Alessandro De Angelis and Wim de Boer and Charles De Clercq and Barbara De Lotto and A. De Min and L. De Paula and Henk Dijkstra and L. Di Ciaccio and J. Dolbeau and K. Doroba and Marcos Dracos and Judith Drees and Mida Dris and Gerald Eigen and Tord Ekelof and Mattias Ellert and Markus Elsing and J-P. Engel and Maria Esp{\'i}rito Santo and Galinos Fanourakis and Dimitris Fassouliotis and Michael Feindt and Julio Fern{\'a}ndez and A. Ferrer and E. Ferrer-Ribas and Fleur M. Ferro and Aaron Firestone and U. Flagmeyer and H. Foeth and Emmanuel Fokitis and F. Fontanelli and B. Franek and A. G. Frodesen and Rudi Fruhwirth and F. Fulda-Quenzer and Joan Fuster and A. Galloni and Daniela Gamba and Stuart D. Gamblin and Miriam Gandelman and C Peteiro Garc{\'i}a and Clara Gaspar and Mar{\'i}lia Gaspar and U. Gasparini and Ph. Gavillet and E. N. Gazis and D. Gel{\'e} and T. Geralis and Nabil Ghodbane and Isabelle Gil and Frank Glege and Ryszard Gokieli and Bo{\vs}tjan Golob and Guillelmo G{\'o}mez-Ceballos and Patrı́cia Gonçalves and I. Gonzalez Caballero and G. Geetha Gopal and L. S. Gorn and Yu. Gouz and Vincent Gracco and J{\"o}rn Grahl and Elda Graziani and Ph Gris and Gilbert Grosdidier and Karolina Grzelak and Julien Guy and Christoph Haag and Friedemann Hahn and Siegfried Hahn and Saqlain Haider and Anita Hallgren and Klaus Hamacher and J G Hansen and Fred J. Harris and F. Hauler and Vincent Hedberg and Susanna Heising and J. Joaqu{\'i}n Hern{\'a}ndez and Ph Herquet and Hugh Herr and E. Higon and S. L. Holmgren and Philip J Holt and S. Hoorelbeke and M. A. Houlden and J. Hrubec and Michael Huber and Graham J. Hughes and Klas Hultqvist and James N. Jackson and Richard Jacobsson and P. Jalocha and Romuald Janik and Ch. Jarlskog and G. Jarlskog and Philippe Jarry and B. Jean-Marie and Daniel Jeans and Eva K Johansson and Per O. Jonsson and Christian Joram and P. Juillot and L. Jungermann and F. Kapusta and Konstantinos Karafasoulis and S. Katsanevas and E. C. Katsoufis and R. Keranen and G. Kernel and Borut Paul Kersevan and Yu. N. Khokhlov and B. A. Khomenko and N. N. Khovanski and Ari Kiiskinen and Bryant T. King and A. Kinvig and Nanna Kjaer and Peter M. Kluit and P. Kokkinias and V. Kostioukhine and C. Kourkoumelis and O. M. Kouznetsov and Manfred Krammer and E. Kriznic and Z. Krumstein and Peter Kubinec and Joanna Kurowska and K. Kurvinen and Justin Lamsa and David W. Graham Lane and V. O. Lapin and J-P. Laugier and Rauno Lauhakangas and G. Klein F. Leder and F. Ledroit and Lasse Leinonen and A. Leisos and R. Leitner and J. Lemonne and G. Lenzen and Vincent Lepeltier and Tadeusz Lesiak and M. Lethuillier and J. F. Libby and Wolfgang Liebig and Dietri h Liko and Anna Lipniacka and I. Lippi and B. Loerstad and James Loken and Jorge Lopes and Jos{\'e} M. L{\'o}pez and Ricardo Lopez-Fernandez and Dimitris Loukas and Power Lutz and L. Lyons and J Macnaughton and Jessica R Mahon and Ari Maio and Alimohammad Malek and Stefanos Maltezos and V. Malychev and Felix Mandl and J. B. Marco and R. Marco and Bilkis Marechal and Martino Margoni and J-C. Marin and Christian Mariotti and Athanasios Markou and C. Mart{\'i}nez-Rivero and S. Marti i Garcia and Jozef M{\'a}{\vs}ik and Nikilaos P Mastroyiannopoulos and F. del Pinal Matorras and Clara Matteuzzi and Giorgio Matthiae and Federica Mazzucato and Eric Merle and Claudia Meroni and W. T. Meyer and Alexei Miagkov and Enrica Migliore and L. Mirabito and Winfried A. Mitaroff and U. Mjoernmark and T. Moa and Marcin Moch and Rolf M{\"o}ller and K. M{\"o}nig and Miriam Monge and D. Moraes and Paolo Morettini and Greg J. Morton and Ulrich Mueller and Kirsten M{\"u}nich and Martijn Mulders and C. Mulet-Marquis and Leandro Resende Mundim and R. Muresan and William J. Murray and B. Muryn and Glenn Myatt and T. Myklebust and F. Naraghi and M. Nassiakou and Francesco L. Navarria and Krzysztof Nawrocki and Pierre Negri and Niko Neufeld and Rosy Nicolaidou and Bbrge S Nielsen and P. Niezurawski and Maxim N. Nikolenko and V. Nomokonov and Anders O. H. Nygren and V. A. Obraztsov and A. G. Olshevski and Ant{\'o}nio Onofre and Risto Orava and G{\'e}raldine Orazi and Kris L Osterberg and A. Ouraou and Arantza Oyanguren and Marco Paganoni and Simona Paiano and Rafael Rodriguez de Paiva and Juan P. Palacios and Henryk Palka and Luc Pape and Chris Parkes and Fabrizio Parodi and Ulrich Parzefall and A C Passeri and Oliver Passon and T. J. Pavel and M. Pegoraro and Lu{\'i}s Peralta and Mag. Elisabeth Pernicka and Andrea Perrotta and Chara Petridou and A. Petrolini and H. T. Phillips and F. M. Pierre and M{\'a}rio Pimenta and Elena Piotto and T. Podobnik and Vincent Poireau and Manisha Pol and G. Polok and Paolo Poropat and V V Pozdniakov and Paolo Privitera and Nelli Pukhaeva and A Pullia and Danica Radojicic and Susanna Ragazzi and Hadi Asadi Rahmani and J. R. Rames and P. N. Ratoff and Alexander L. Read and Paolo Rebecchi and Nicola Redaelli and M. Regler and Jorge Rehn and Dariya Reid and P. L. Reinertsen and R. Todd Reinhardt and Peter B. Renton and L. K. Resvanis and F. Arduini Richard and Jan Ridky and Giuseppe Rinaudo and Isabelle Ripp-Baudot and A Delgado Romero and P. Ronchese and E. I. Rosenberg and P. Rosinsk{\'y} and Patrick Roudeau and T. Rovelli and Vanina Ruhlmann-Kleider and Amparo Ruiz and H. Saarikko and Y. Sacquin and A. B. Sadovsky and G. Sajot and Jos{\'e} Salt and Dimos Sampsonidis and Marilena Sannino and Aurore Savoy-Navarro and Ph. Schwemling and Benjamin Schwering and Ulrich Schwickerath and Fabrizio Scuri and P R Seager and Y. Sedykh and Andrea Segar and Nicole Seibert and R. Sekulin and Giulia Sette and Ronald Cintra Shellard and Martin Siebel and Luc Simard and F. Simonetto and A. N. Sisakian and G{\'e}rard Smadja and Oxana Smirnova and Granny Smith and Andr{\'e} Sopczak and Ron Sosnowski and Tony Spassov and E. Spiriti and Sandro Squarcia and Constantin Stanescu and Marcel Stanitzki and Katherine Stevenson and Achille Stocchi and Judith Strau\ss and Richard Strub and Bjarne Stugu and M. Szczekowski and M. Szeptycka and T. Tabarelli and Anyes Taffard and O. Tchikilev and Fredrik Tegenfeldt and F. Terranova and Jean-Pierre Timmermans and N. Tinti and L. G. Tkatchev and Mark Tobin and St. Todorova and Basheer Tome and A. Tonazzo and Luana Tortora and Pablo Tortosa and G. Transtromer and D. Treille and G. Tristram and Marcin Trochimczuk and C. Troncon and M-L. Turluer and I. A. Tyapkin and P. Tyapkin and Sp. Tzamarias and O. Ullaland and Vladimir Uvarov and Giovanni. Valenti and E. Vallazza},
An analysis of the data collected in 1997 and 1998 with the DELPHI detector at e + e − collision energies close to 183 and 189 GeV was performed in order to extract the hadronic and leptonic fermion–pair cross–sections, as well as the leptonic forward–backward asymmetries and angular distributions. The data are used to put limit on contact interactions between fermions, the exchange of R-parity violating SUSY sneutrinos, Z ′ bosons and the existence of gravity in extra dimensions. 
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