Measurement of the Lifetime of b-baryons - IN2P3 - Institut national de physique nucléaire et de physique des particules
Journal Articles European Physical Journal C: Particles and Fields Year : 1999

Measurement of the Lifetime of b-baryons

P. Abreu , W. Adam , T. Adye , P. Adzic , Z. Albrecht , T. Alderweireld , G D. Alekseev , R. Alemany , T. Allmendinger , P P. Allport , S. Almehed , U. Amaldi , S. Amato , E G. Anassontzis , P. Andersson , A. Andreazza , S. Andringa , P. Antilogus (1) , W D. Apel , Y. Arnoud , B. Asman , J.-E. Augustin (1) , A. Augustinus , P. Baillon , P. Bambade (2) , F. Barao , Guido Barbiellini , R. Barbier (1) , D Y. Bardin , G. Barker , A. Baroncelli , M. Battaglia , M. Baubillier (3) , K H. Becks , M. Begalli , P. Beilliere (4) , Yu. Belokopytov , K. Belous , a C. Benvenuti , C. Berat (5) , M. Berggren (1) , D. Bertini , M. Besancon , F. Bianchi , M. Bigi , M S. Bilenky , M A. Bizouard (2) , D. Bloch (6) , H M. Blom , M. Bonesini , W. Bonivento (2) , M. Boonekamp , P S L. Booth , a W. Borgland , G. Borisov , C. Bosio , O. Botner , E. Boudinov , B. Bouquet (2) , C. Bourdarios (2) , T J V. Bowcock , I. Boyko , I. Bozovic , M. Bozzo , P. Branchini , T. Brenke , R A. Brenner , J M. Brunet (4) , L. Bugge , T. Buran , P. Buschmann , S. Cabrera , M. Caccia , M. Calvi , T. Camporesi , V. Canale , F. Carena , L. Carroll , C. Caso , M V. Castillo Gimenez , A. Cattai , F R. Cavallo , V. Chabaud , M. Chapkin , Ph. Charpentier , L. Chaussard (1) , P. Checchia , G A. Chelkov , R. Chierici , P V. Chliapnikov , P. Chochula , V. Chorowicz (1) , J. Chudoba , K. Cieslik , P. Collins , R. Contri , E. Cortina , G. Cosme (2) , F. Cossutti , J H. Cowell , H B. Crawley , D. Crennell , S. Crepe , J. Cuevas-Maestro , S. Czellar , M. Davenport , W. da Silva (3) , A. Deghorain , G. Della Ricca , P A. Delpierre (7) , N. Demaria , A. de Angelis , W. de Boer , S. de Brabandere , C. de Clercq , B. de Lotto , A. de Min , L. de Paula , H. Dijkstra , L. Di Ciaccio , J. Dolbeau (4) , K. Doroba , J. Drees , M. Dris , A. Duperrin (1) , J D. Durand , G. Eigen , T. Ekelof , G. Ekspong , M. Ellert , M. Elsing , J.P. Engel (6) , B. Erzen , M. Espirito Santo , E. Falk , G. Fanourakis , D. Fassouliotis , J. Fayot (3) , M. Feindt , A. Fenyuk , P. Ferrari , A. Ferrer , E. Ferrer-Ribas (2) , S. Fichet (3) , A. Firestone , H. Foeth , E. Fokitis , F. Fontanelli , B. Franek , a G. Frodesen , F. Fulda-Quenzer , J. Fuster , A. Galloni , D. Gamba , S. Gamblin (2) , M. Gandelman , C. Garcia , C. Gaspar , M. Gaspar , P. Gavillet , E N. Gazis , D. Gele (6) , N. Ghodbane (1) , I. Gil , F. Glege , R. Gokieli , B. Golob , G. Gomez-Ceballos , P. Goncalves , I. Gonzalezcaballero , G. Gopal , L. Gorn , M. Gorski , P. Gouz Yu , V. Gracco , J. Grahl , E. Graziani , C. Green , H J. Grimm , P. Gris , G. Grosdidier , K. Grzelak , M. Gunther , J. Guy , F. Hahn , S. Hahn , S. Haider , K. Hamacher , J. Hansen , F J. Harris , V. Hedberg , S. Heising , J J. Hernandez , P. Herquet , H. Herr , T L. Hessing , J M. Heuser , E. Higsn , S O. Holmgren , P J. Holt , S. Hoorelbeke , M. Houlden , J. Hrubec , K. Huet , G J. Hughes , K. Hultqvist , J N. Jackson , R. Jacobsson , P. Jalocha , C. Jarlskog , G. Jarlskog , P. Jarry , B. Jean-Marie (2) , E K. Johansson , P. Jonsson (1) , C. Joram , P. Juillot (6) , F. Kapusta (3) , K. Karafasoulis , S. Katsanevas (1) , E C. Katsoufis , R. Keranen , B P. Kersevan , B A. Khomenko , N N. Khovanski , A. Kiiskinen , B. King , A. Kinvig , N J. Kjaer , O. Klapp , H. Klein , P. Kluit , P. Kokkinias , M. Koratzinos , V. Kostioukhine , C. Kourkoumelis , O. Kouznetsov , M. Krammer , E. Kriznic , J. Krstic , Z. Krumstein , P. Kubinec , J. Kurowska , K. Kurvinen , J W. Lamsa , W. Laned , P. Langefeld , V. Lapin , J P. Laugier , R. Lauhakangas , G. Leder , F. Ledroit (5) , V. Lefibure , L. Leinonen , A. Leisos , R. Leitner , J. Lemonne , G. Lenzen , V. Lepeltier (2) , T. Lesiak , M. Lethuillier , J. Libby , D. Liko , A. Lipniacka , I. Lippi , B. Loerstad , J G. Loken , J H. Lopes , J M. Lopez , R. Lopez-Fernandez (5) , D. Loukas , P. Lutz , L. Lyons , J. Macnaughton , J R. Mahon , A. Maio , A. Malek , T G M. Malmgren , V. Malychev , J. Marco , R. Marco , B. Marechal , M. Margoni , J C. Marin , C. Mariotti , A. Markou , C. Martinez-Rivero (2) , F. Martinez-Vidal , I Garcia S. Marti , J. Masik , N. Mastroyiannopoulos , F. Matorras , C. Matteuzzi , G. Matthiae , F. Mazzucato , M. Mazzucato , M. Mccubbin , R. Mckay , R. Mcnulty , G. Mcpherson , C. Meroni , W T. Meyer , E. Migliore , L. Mirabito (1) , W A. Mitaroff , U. Mjvrnmark , T. Moa , M. Moch , R. Mxller , K. Mvnig , M R. Monge , X. Moreau (3) , P. Morettini , G A. Morton , M. Mulders , C. Mulet-Marquis (5) , R. Muresan , W.J. Murray , B. Muryn (5) , G. Myatt , T. Myklebust , F. Naraghi (5) , F L. Navarria , S. Navas , P. Negri , S. Nimicek , N. Neufeld , N. Neumeister , R. Nicolaidou , B S. Nielsen , M. Nikolenko (6) , V P. Nomokonov , A. Normand , A. Nygren , V F. Obraztsov , a G. Olshevski , A. Onofre , R. Orava , G. Orazi , K. Osterberg , A. Ouraou , M. Paganoni , S. Paiano , R. Pain (3) , R. Paiva , J. Palacios , H. Palka , T D. Papadopoulou , K. Papageorgiou , L. Pape , C. Parkes , F. Parodi , U. Parzefall , A. Passeri , O. Passon , M. Pegoraro , L. Peralta , M. Pernicka , A. Perrotta , C. Petridou , A. Petrolini , H.T. Phillips , F. Pierre , M. Pimenta , E. Piotto , T. Podobnik , M E. Pol , G. Polok , P. Poropat , V. Pozdniakov , P. Privitera , N. Pukhaeva , A. Pullia , D. Radojicic , S. Ragazzi , H. Rahmani , D. Rakoczy , P N. Ratoff , L. Reada , P. Rebecchi , N G. Redaelli , M. Regler , D. Reid , R. Reinhardt , Pb. Renton , L K. Resvanis , F. Richard (2) , J. Rmdky , G. Rinaudo , O. Rohne , P. Ronchese , E I. Rosenberg , P. Rosinsky , P. Roudeau (2) , T. Rovelli , C. Royon , V. Ruhlmann-Kleider , A. Ruiz , H. Saarikko , Y. Sacquin , A. Sadovsky , G. Sajot (5) , J. Salt , D. Sampsonidis , M. Sannino , Henri Schneider , Ph. Schwemling (3) , U. Schwickerath , M a E. Schyns , F. Scuri , P. Seager , Y. Sedykh , a M. Segar , R. Sekulin , R C. Shellard , A. Sheridan , M. Siebel , L. Simard , F. Simonetto , a N. Sissakian , G. Smadja (1) , N. Smirnov , O. Smirnova , G R. Smith , A. Sopczak , R. Sosnowski , Tz. Spassoff , E. Spiriti , P. Sponholz , S. Squarcia , D. Stampfer , C. Stanescu , S. Stanic , K. Stevenson , A. Stocchi (2) , J. Strauss , R. Strub (6) , B. Stugu , M. Szczekowski , M. Szeptycka , T. Tabarelli de Fatis , F. Tegenfeldt , F. Terranova , J. Timmermans , N. Tinti , L G. Tkatchev , S. Todorova , a G. Tomaradze , B. Tome , A. Tonazzo , L. Tortora , G. Transtromer , D. Treille (4) , M. Trochimczuk , C. Troncon , A. Tsirou , M L. Turluer , I A. Tyapkin , S. Tzamarias , O. Ullaland , V. Uvarov , G. Valenti , E. Vallazza , C. Vander Velde , G W. van Apeldoorn , P. van Dam , W K. Vandoninck , J. van Eldik , A. van Lysebetten , I. van Vulpen , N. Vassilopoulos , G. Vegni , Laurent Ventura , W. Venus , F. Verbeure , L S. Vertogradov , V. Verzi , D. Vilanova , L. Vitale , E. Vlasov , a S. Vodopyanov , C. Vollmer , G. Voulgaris , V. Vrba , H. Wahlen , C. Walck , C. Weiser , D. Wicke , J H. Wickens , G R. Wilkinson , G.R. Wilkinson , M. Witek , G. Wolf , J. Yi , O. Yushchenko , A. Zaitsev , A. Zalewska , P. Zalewski , D. Zavrtanik , E. Zevgolatakos , N I. Zimin , G C. Zucchelli , G. Zumerle , M. Winter (6)
P. Abreu
  • Function : Author
W. Adam
  • Function : Author
T. Adye
  • Function : Author
P. Adzic
  • Function : Author
Z. Albrecht
  • Function : Author
T. Alderweireld
  • Function : Author
G D. Alekseev
  • Function : Author
R. Alemany
  • Function : Author
T. Allmendinger
  • Function : Author
P P. Allport
  • Function : Author
S. Almehed
  • Function : Author
U. Amaldi
  • Function : Author
S. Amato
  • Function : Author
E G. Anassontzis
  • Function : Author
P. Andersson
  • Function : Author
A. Andreazza
  • Function : Author
S. Andringa
  • Function : Author
P. Antilogus
W D. Apel
  • Function : Author
Y. Arnoud
  • Function : Author
B. Asman
  • Function : Author
A. Augustinus
  • Function : Author
P. Baillon
  • Function : Author
F. Barao
  • Function : Author
Guido Barbiellini
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D Y. Bardin
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G. Barker
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A. Baroncelli
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M. Battaglia
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K H. Becks
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M. Begalli
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Yu. Belokopytov
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K. Belous
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a C. Benvenuti
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D. Bertini
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M. Besancon
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F. Bianchi
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M. Bigi
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M S. Bilenky
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H M. Blom
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M. Bonesini
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W. Bonivento
M. Boonekamp
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P S L. Booth
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a W. Borgland
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G. Borisov
C. Bosio
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O. Botner
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E. Boudinov
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T J V. Bowcock
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I. Boyko
I. Bozovic
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M. Bozzo
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P. Branchini
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T. Brenke
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R A. Brenner
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L. Bugge
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T. Buran
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P. Buschmann
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S. Cabrera
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M. Caccia
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M. Calvi
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T. Camporesi
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V. Canale
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F. Carena
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L. Carroll
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C. Caso
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M V. Castillo Gimenez
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A. Cattai
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F R. Cavallo
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V. Chabaud
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M. Chapkin
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Ph. Charpentier
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P. Checchia
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G A. Chelkov
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R. Chierici
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P V. Chliapnikov
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P. Chochula
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J. Chudoba
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K. Cieslik
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P. Collins
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R. Contri
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E. Cortina
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F. Cossutti
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J H. Cowell
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H B. Crawley
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D. Crennell
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S. Crepe
J. Cuevas-Maestro
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S. Czellar
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M. Davenport
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A. Deghorain
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G. Della Ricca
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N. Demaria
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A. de Angelis
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W. de Boer
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S. de Brabandere
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C. de Clercq
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B. de Lotto
A. de Min
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L. de Paula
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H. Dijkstra
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L. Di Ciaccio
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K. Doroba
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J. Drees
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M. Dris
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J D. Durand
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G. Eigen
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T. Ekelof
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G. Ekspong
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M. Ellert
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M. Elsing
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B. Erzen
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M. Espirito Santo
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E. Falk
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G. Fanourakis
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D. Fassouliotis
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M. Feindt
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A. Fenyuk
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P. Ferrari
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A. Ferrer
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A. Firestone
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H. Foeth
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E. Fokitis
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F. Fontanelli
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B. Franek
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a G. Frodesen
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F. Fulda-Quenzer
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J. Fuster
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A. Galloni
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D. Gamba
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M. Gandelman
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C. Garcia
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C. Gaspar
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M. Gaspar
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P. Gavillet
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E N. Gazis
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I. Gil
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F. Glege
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R. Gokieli
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B. Golob
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G. Gomez-Ceballos
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P. Goncalves
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I. Gonzalezcaballero
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G. Gopal
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L. Gorn
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M. Gorski
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P. Gouz Yu
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V. Gracco
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J. Grahl
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E. Graziani
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C. Green
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H J. Grimm
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P. Gris
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G. Grosdidier
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K. Grzelak
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M. Gunther
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J. Guy
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F. Hahn
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S. Hahn
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S. Haider
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K. Hamacher
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J. Hansen
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F J. Harris
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V. Hedberg
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S. Heising
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J J. Hernandez
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P. Herquet
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H. Herr
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T L. Hessing
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J M. Heuser
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E. Higsn
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S O. Holmgren
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P J. Holt
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S. Hoorelbeke
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M. Houlden
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J. Hrubec
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K. Huet
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G J. Hughes
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K. Hultqvist
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J N. Jackson
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R. Jacobsson
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P. Jalocha
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C. Jarlskog
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G. Jarlskog
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P. Jarry
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E K. Johansson
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C. Joram
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K. Karafasoulis
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E C. Katsoufis
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R. Keranen
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B P. Kersevan
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B A. Khomenko
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N N. Khovanski
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A. Kiiskinen
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B. King
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A. Kinvig
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N J. Kjaer
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O. Klapp
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H. Klein
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P. Kluit
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P. Kokkinias
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M. Koratzinos
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V. Kostioukhine
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C. Kourkoumelis
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O. Kouznetsov
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M. Krammer
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E. Kriznic
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J. Krstic
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Z. Krumstein
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P. Kubinec
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J. Kurowska
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K. Kurvinen
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J W. Lamsa
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W. Laned
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P. Langefeld
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V. Lapin
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J P. Laugier
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R. Lauhakangas
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G. Leder
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V. Lefibure
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L. Leinonen
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A. Leisos
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R. Leitner
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J. Lemonne
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G. Lenzen
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T. Lesiak
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M. Lethuillier
J. Libby
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D. Liko
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A. Lipniacka
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I. Lippi
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B. Loerstad
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J G. Loken
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J H. Lopes
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J M. Lopez
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D. Loukas
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P. Lutz
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L. Lyons
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J. Macnaughton
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J R. Mahon
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A. Maio
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A. Malek
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T G M. Malmgren
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V. Malychev
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J. Marco
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R. Marco
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B. Marechal
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M. Margoni
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J C. Marin
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C. Mariotti
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A. Markou
F. Martinez-Vidal
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I Garcia S. Marti
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J. Masik
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N. Mastroyiannopoulos
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F. Matorras
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C. Matteuzzi
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G. Matthiae
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F. Mazzucato
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M. Mazzucato
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M. Mccubbin
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R. Mckay
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R. Mcnulty
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G. Mcpherson
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C. Meroni
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W T. Meyer
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E. Migliore
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W A. Mitaroff
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U. Mjvrnmark
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T. Moa
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M. Moch
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R. Mxller
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K. Mvnig
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M R. Monge
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P. Morettini
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G A. Morton
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M. Mulders
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R. Muresan
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W.J. Murray
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G. Myatt
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T. Myklebust
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F L. Navarria
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S. Navas
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P. Negri
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S. Nimicek
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N. Neufeld
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N. Neumeister
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R. Nicolaidou
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B S. Nielsen
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V P. Nomokonov
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A. Normand
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A. Nygren
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V F. Obraztsov
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a G. Olshevski
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A. Onofre
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R. Orava
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G. Orazi
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K. Osterberg
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A. Ouraou
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M. Paganoni
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S. Paiano
R. Paiva
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J. Palacios
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H. Palka
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T D. Papadopoulou
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K. Papageorgiou
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L. Pape
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C. Parkes
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F. Parodi
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U. Parzefall
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A. Passeri
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O. Passon
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M. Pegoraro
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L. Peralta
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M. Pernicka
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A. Perrotta
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C. Petridou
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A. Petrolini
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H.T. Phillips
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F. Pierre
M. Pimenta
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E. Piotto
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T. Podobnik
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M E. Pol
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G. Polok
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P. Poropat
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V. Pozdniakov
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P. Privitera
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N. Pukhaeva
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A. Pullia
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D. Radojicic
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S. Ragazzi
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H. Rahmani
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D. Rakoczy
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P N. Ratoff
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L. Reada
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P. Rebecchi
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N G. Redaelli
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M. Regler
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D. Reid
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R. Reinhardt
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Pb. Renton
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L K. Resvanis
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J. Rmdky
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G. Rinaudo
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O. Rohne
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P. Ronchese
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E I. Rosenberg
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P. Rosinsky
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T. Rovelli
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C. Royon
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V. Ruhlmann-Kleider
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A. Ruiz
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H. Saarikko
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Y. Sacquin
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A. Sadovsky
  • Function : Author
J. Salt
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D. Sampsonidis
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M. Sannino
  • Function : Author
Henri Schneider
U. Schwickerath
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M a E. Schyns
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F. Scuri
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P. Seager
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Y. Sedykh
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a M. Segar
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R. Sekulin
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R C. Shellard
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A. Sheridan
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M. Siebel
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L. Simard
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F. Simonetto
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a N. Sissakian
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N. Smirnov
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O. Smirnova
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G R. Smith
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A. Sopczak
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R. Sosnowski
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Tz. Spassoff
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E. Spiriti
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P. Sponholz
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S. Squarcia
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D. Stampfer
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C. Stanescu
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S. Stanic
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K. Stevenson
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J. Strauss
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B. Stugu
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M. Szczekowski
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M. Szeptycka
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T. Tabarelli de Fatis
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F. Tegenfeldt
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F. Terranova
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J. Timmermans
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N. Tinti
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L G. Tkatchev
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S. Todorova
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a G. Tomaradze
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B. Tome
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A. Tonazzo
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L. Tortora
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G. Transtromer
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M. Trochimczuk
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C. Troncon
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A. Tsirou
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M L. Turluer
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I A. Tyapkin
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S. Tzamarias
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O. Ullaland
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V. Uvarov
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G. Valenti
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E. Vallazza
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C. Vander Velde
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G W. van Apeldoorn
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P. van Dam
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W K. Vandoninck
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J. van Eldik
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A. van Lysebetten
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I. van Vulpen
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N. Vassilopoulos
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G. Vegni
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Laurent Ventura
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W. Venus
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F. Verbeure
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L S. Vertogradov
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V. Verzi
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D. Vilanova
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L. Vitale
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E. Vlasov
a S. Vodopyanov
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C. Vollmer
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G. Voulgaris
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V. Vrba
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H. Wahlen
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C. Walck
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C. Weiser
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D. Wicke
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J H. Wickens
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G R. Wilkinson
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G.R. Wilkinson
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M. Witek
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G. Wolf
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J. Yi
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O. Yushchenko
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A. Zaitsev
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A. Zalewska
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P. Zalewski
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D. Zavrtanik
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E. Zevgolatakos
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N I. Zimin
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G C. Zucchelli
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G. Zumerle
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Abstract

The average lifetime of weakly decaying $b$-baryons was studied using 3.6 million $Z^0$ hadronic decays collected by the DELPHI detector at LEP. The measurement of the proper decay time distribution of secondary vertices was used on three complementary samples. The first sample consisted of events with a fully reconstructed $\Lambda_c^+$ and an opposite charge lepton, or an oppositely charged lepton pair accompanied by a $\Lambda^0$. The other two samples were more inclusive, where $b$-baryon semileptonic decays were recognized by the presence of either a proton identified by the RICH detector or a $\Lambda^0$ and a lepton of charge opposite to that of the proton. The combined result was: \begin{eqnarray*} \tau(b\mathrm{-baryon}) = 1.14\pm0.08 \; (stat)\pm0.04 \; (syst) \; \mathrm{ps} \; . \end{eqnarray*} It updates and replaces all previous results published by the DELPHI collaboration.
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Dates and versions

in2p3-00014509 , version 1 (11-10-1999)

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Cite

P. Abreu, W. Adam, T. Adye, P. Adzic, Z. Albrecht, et al.. Measurement of the Lifetime of b-baryons. European Physical Journal C: Particles and Fields, 1999, 10, pp.185-189. ⟨10.1007/s100520050582⟩. ⟨in2p3-00014509⟩
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