Production of $\Xi_c^0$ and $\Xi_b$ in Z decays and lifetime measurement of $\Xi_b$ - IN2P3 - Institut national de physique nucléaire et de physique des particules Access content directly
Journal Articles European Physical Journal C: Particles and Fields Year : 2005

Production of $\Xi_c^0$ and $\Xi_b$ in Z decays and lifetime measurement of $\Xi_b$

J. Abdallah (1) , P. Abreu , W. Adam , P. Adzic , T. Albrecht , T. Alderweireld , R. Alemany-Fernandez , T. Allmendinger , P. Allport , U. Amaldi , N. Amapane , S. Amato , E. Anashkin , A. Andreazza , S. Andringa , N. Anjos , P. Antilogus (1) , W.-D. Apel , Y. Arnoud (2) , S. Ask , B. Asman , J.-E. Augustin (1) , A. Augustinus , P. Baillon , A. Ballestrero , P. Bambade (3) , R. Barbier (4) , D. Bardin , G.J. Barker , A. Baroncelli , M. Battaglia , M. Baubillier (1) , K.-H. Becks , M. Begalli , A. Behrmann , E. Ben-Haim (1, 3) , N. Benekos , A. Benvenuti , C. Berat (2) , M. Berggren (1) , L. Berntzon , D. Bertrand , M. Besancon , N. Besson , D. Bloch (5) , M. Blom , M. Bluj , M. Bonesini , M. Boonekamp , P.S.L. Booth , G. Borisov , O. Botner , B. Bouquet (3) , V. Bowcock , I. Boyko , M. Bracko , R. Brenner , E. Brodet , P. Bruckman , J.-M. Brunet (6) , L. Bugge , P. Buschmann , M. Calvi , T. Camporesi , V. Canale , F. Carena , N. Castro , F. Cavallo , M. Chapkin , Ph. Charpentier , P. Checchia , R. Chierici , P. Chliapnikov , J. Chudoba , U. Chung , K. Cieslik , P. Collins , R. Contri , G. Cosme (3) , F. Cossutti , M.J. Costa , D. Crennell , J. Cuevas , J. Dalmau , T.Da Silva , W. da Silva (1) , G. Della Ricca , A. de Angelis , W. de Boer , C. de Clercq , B. de Lotto , N. de Maria , A. de Min , L. de Paula , L. Di Ciaccio , A. Di Simone , K. Doroba , J. Drees , M. Dris , G. Eigen , T. Ekelof , M. Ellert , M. Elsing , C. Espirito Santo , G. Fanourakis , D. Fassouliotis , M. Feindt , J. Fernandez , A. Ferrer , F. Ferro , U. Flagmeyer , H. Foeth , E. Fokitis , F. Fulda-Quenzer (3) , J. Fuster , M. Gandelman , G. Garcia , Ph. Gavillet , E. Gazis , R. Gokieli , B. Golob , G. Gomez-Ceballos , P. Goncalves , E. Graziani , G. Grosdidier (3) , K. Grzelak , J. Guy , C. Haag , A. Hallgren , K. Hamacher , K. Hamilton , S. Haug , F. Hauler , V. Hedberg , M. Hennecke , H. Herr , Jakobus Hoffman , S.-O. Holmgren , J. Holt , A. Houlden , K. Hultqvist , J.N. Jackson , G. Jarlskog , P. Jarry , D. Jeans , E.K. Johansson , P. Jonsson (4) , C. Joram , L. Jungermann , F. Kapusta (1) , S. Katsanevas (4) , E. Katsoufis , G. Kernel , P. Kersevan , U. Kerzel , A. Kiiskinen , T. King , J. Kjaer , P. Kluit , P. Kokkinias , C. Kourkoumelis , O. Kouznetsov , Z. Krumstein , M. Kucharczyk , J. Lamsa , G. Leder , F. Ledroit (2) , L. Leinonen , R. Leitner , J. Lemonne , V. Lepeltier (3) , T. Lesiak , W. Liebig , D. Liko , A. Lipniacka , J.H. Lopes , J.M. Lopez , D. Loukas , P. Lutz , L. Lyons , J. Macnaughton , A. Malek , S. Maltezos , F. Mandl , J. Marco , R. Marco , B. Marechal , M. Margoni , J.-C. Marin , C. Mariotti , A. Markou , C. Martinez-Rivero , J. Masik , N. Mastroyiannopoulos , F. Matorras , C. Matteuzzi , F. Mazzucato , M. Mazzucato , R. Mc Nulty , C. Meroni , E. Migliore , W. Mitaroff , U. Mjoernmark , T. Moa , M. Moch , K. Moenig , R. Monge , J. Montenegro , D. Moraes , S. Moreno , P. Morettini , U. Mueller , K. Muenich , M. Mulders , L. Mundim , W. Murray , B. Muryn , G. Myatt , T. Myklebust , M. Nassiakou , F. Navarria , K. Nawrocki , R. Nicolaidou , M. Nikolenko (5) , A. Oblakowska-Mucha , V. Obraztsov , A. Olshevski , A. Onofre , R. Orava , K. Osterberg , A. Ouraou , A. Oyanguren , M. Paganoni , S. Paiano , J.P. Palacios , H. Palka , D. Papadopoulou , L. Pape , C. Parkes , F. Parodi , U. Parzefall , A. Passeri , O. Passon , L. Peralta , V. Perepelitsa , A. Perrotta , A. Petrolini , J. Piedra , L. Pieri , F. Pierre , M. Pimenta , E. Piotto , T. Podobnik , V. Poireau , E. Pol , G. Polok , P. Poropat , V. Pozdniakov , N. Pukhaeva , A. Pullia , J. Rames , L. Ramler , A. Read , P. Rebecchi , J. Rehn , D. Reid , R. Reinhardt , P. Renton , F. Richard (3) , J. Ridky , M. Rivero , D. Rodriguez , A. Romero , P. Ronchese , P. Roudeau (3) , T. Rovelli , V. Ruhlmann-Kleider , D. Ryabtchikov , A. Sadovsky , L. Salmi , J. Salt , A. Savoy-Navarro (1) , U. Schwickerath , A. Segar , R. Sekulin , M. Siebel , A. Sisakian , G. Smadja (4) , O. Smirnova , A. Sokolov , A. Sopczak , R. Sosnowski , T. Spassov , M. Stanitzki , A. Stocchi (3) , J. Strauss , B. Stugu , M. Szczekowski , M. Szeptycka , T. Szumlak , T. Tabarelli , C. Taffard , F. Tegenfeldt , J. Timmermans , L. Tkatchev , M. Tobin , S. Todorovova , B. Tome , A. Tonazzo , Pablo Tortosa , P. Travnicek , D. Treille , G. Tristram (6) , M. Trochimczuk , C. Troncon , M.-L. Turluer , A. Tyapkin , P. Tyapkin , S. Tzamarias , V. Uvarov , G. Valenti , P. van Dam , J. van Eldik , A. van Lysebetten , N. van Remortel , I. van Vulpen , G. Vegni , F. Veloso , W. Venus , P. Verdier (4) , V. Verzi , D. Vilanova , L. Vitale , V. Vrba , H. Wahlen , J. Washbrook , C. Weiser , D. Wicke , J. Wickens , G. Wilkinson , M. Winter (5) , M. Witek , O. Yushchenko , A. Zalewska , P. Zalewski , D. Zavrtanik , V. Zhuravlov , I. Zimin , A. Zintchenko , M. Zupan
P. Abreu
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W. Adam
  • Function : Author
P. Adzic
  • Function : Author
T. Albrecht
  • Function : Author
T. Alderweireld
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R. Alemany-Fernandez
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T. Allmendinger
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P. Allport
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U. Amaldi
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N. Amapane
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S. Amato
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E. Anashkin
  • Function : Author
A. Andreazza
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S. Andringa
  • Function : Author
N. Anjos
  • Function : Author
W.-D. Apel
  • Function : Author
S. Ask
  • Function : Author
B. Asman
  • Function : Author
A. Augustinus
  • Function : Author
P. Baillon
  • Function : Author
A. Ballestrero
  • Function : Author
D. Bardin
  • Function : Author
G.J. Barker
  • Function : Author
A. Baroncelli
  • Function : Author
M. Battaglia
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K.-H. Becks
  • Function : Author
M. Begalli
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A. Behrmann
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N. Benekos
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A. Benvenuti
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L. Berntzon
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D. Bertrand
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M. Besancon
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N. Besson
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M. Blom
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M. Bluj
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M. Bonesini
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M. Boonekamp
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P.S.L. Booth
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G. Borisov
O. Botner
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V. Bowcock
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I. Boyko
M. Bracko
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R. Brenner
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E. Brodet
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P. Bruckman
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L. Bugge
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P. Buschmann
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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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N. Castro
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F. Cavallo
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M. Chapkin
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Ph. Charpentier
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P. Checchia
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R. Chierici
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P. Chliapnikov
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J. Chudoba
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U. Chung
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K. Cieslik
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P. Collins
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R. Contri
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F. Cossutti
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M.J. Costa
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D. Crennell
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J. Cuevas
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J. Dalmau
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T.Da Silva
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G. Della Ricca
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A. de Angelis
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W. de Boer
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C. de Clercq
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B. de Lotto
N. de Maria
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A. de Min
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L. de Paula
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L. Di Ciaccio
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A. Di Simone
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K. Doroba
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J. Drees
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M. Dris
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G. Eigen
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T. Ekelof
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M. Ellert
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M. Elsing
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C. Espirito Santo
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G. Fanourakis
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D. Fassouliotis
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M. Feindt
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J. Fernandez
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A. Ferrer
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F. Ferro
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U. Flagmeyer
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H. Foeth
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E. Fokitis
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J. Fuster
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M. Gandelman
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G. Garcia
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Ph. Gavillet
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E. Gazis
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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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E. Graziani
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K. Grzelak
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J. Guy
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C. Haag
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A. Hallgren
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K. Hamacher
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K. Hamilton
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S. Haug
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F. Hauler
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V. Hedberg
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M. Hennecke
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H. Herr
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Jakobus Hoffman
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S.-O. Holmgren
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J. Holt
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A. Houlden
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K. Hultqvist
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J.N. Jackson
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G. Jarlskog
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P. Jarry
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D. Jeans
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E.K. Johansson
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C. Joram
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L. Jungermann
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E. Katsoufis
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G. Kernel
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P. Kersevan
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U. Kerzel
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A. Kiiskinen
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T. King
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J. Kjaer
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P. Kluit
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P. Kokkinias
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C. Kourkoumelis
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O. Kouznetsov
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Z. Krumstein
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M. Kucharczyk
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J. Lamsa
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G. Leder
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L. Leinonen
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R. Leitner
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J. Lemonne
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T. Lesiak
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W. Liebig
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D. Liko
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A. Lipniacka
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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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A. Malek
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S. Maltezos
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F. Mandl
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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
C. Martinez-Rivero
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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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F. Mazzucato
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R. Mc Nulty
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C. Meroni
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E. Migliore
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W. Mitaroff
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U. Mjoernmark
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T. Moa
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M. Moch
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K. Moenig
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R. Monge
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J. Montenegro
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D. Moraes
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S. Moreno
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P. Morettini
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U. Mueller
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K. Muenich
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M. Mulders
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L. Mundim
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W. Murray
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B. Muryn
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G. Myatt
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T. Myklebust
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M. Nassiakou
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F. Navarria
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K. Nawrocki
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R. Nicolaidou
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A. Oblakowska-Mucha
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V. Obraztsov
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A. Olshevski
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A. Onofre
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R. Orava
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K. Osterberg
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A. Ouraou
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A. Oyanguren
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M. Paganoni
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S. Paiano
J.P. Palacios
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H. Palka
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D. Papadopoulou
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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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L. Peralta
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V. Perepelitsa
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A. Perrotta
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A. Petrolini
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J. Piedra
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L. Pieri
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F. Pierre
M. Pimenta
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E. Piotto
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T. Podobnik
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V. Poireau
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E. Pol
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G. Polok
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P. Poropat
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V. Pozdniakov
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N. Pukhaeva
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A. Pullia
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J. Rames
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L. Ramler
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A. Read
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P. Rebecchi
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J. Rehn
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D. Reid
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R. Reinhardt
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P. Renton
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J. Ridky
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M. Rivero
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D. Rodriguez
A. Romero
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P. Ronchese
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T. Rovelli
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V. Ruhlmann-Kleider
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D. Ryabtchikov
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A. Sadovsky
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L. Salmi
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J. Salt
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U. Schwickerath
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A. Segar
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R. Sekulin
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M. Siebel
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A. Sisakian
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O. Smirnova
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A. Sokolov
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A. Sopczak
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R. Sosnowski
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T. Spassov
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M. Stanitzki
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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. Szumlak
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T. Tabarelli
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C. Taffard
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F. Tegenfeldt
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J. Timmermans
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L. Tkatchev
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M. Tobin
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S. Todorovova
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B. Tome
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A. Tonazzo
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Pablo Tortosa
P. Travnicek
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D. Treille
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M. Trochimczuk
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C. Troncon
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M.-L. Turluer
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A. Tyapkin
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P. Tyapkin
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S. Tzamarias
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V. Uvarov
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G. Valenti
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P. van Dam
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J. van Eldik
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A. van Lysebetten
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N. van Remortel
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I. van Vulpen
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G. Vegni
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F. Veloso
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W. Venus
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P. Verdier
V. Verzi
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D. Vilanova
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L. Vitale
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V. Vrba
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H. Wahlen
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J. Washbrook
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C. Weiser
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D. Wicke
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J. Wickens
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G. Wilkinson
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M. Witek
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O. Yushchenko
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A. Zalewska
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P. Zalewski
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D. Zavrtanik
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V. Zhuravlov
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I. Zimin
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A. Zintchenko
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M. Zupan
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Abstract

The charmed strange baryon Xi_c^0 was searched for in the decay channel Xi_c^0 -> Xi- pi+, and the beauty strange baryon Xi_b in the inclusive channel Xi_b -> Xi- l- anti-nu X, using the 3.5 million hadronic Z events collected by the DELPHI experiment in the years 1992--1995. The Xi- was reconstructed through the decay Xi- -> Lambda pi-, using a constrained fit method for cascade decays. An iterative discriminant analysis was used for the Xi_c^0 and Xi_b selection. The production rates were measured to be f_{Xi_c^0} x BR(Xi_c^0 -> Xi- pi+)= (4.7 +/- 1.4 (stat.) +/- 1.1 (syst.))10^{-4} per hadronic Z decay, and BR(b -> Xi_b) x BR(Xi_b -> Xi- l- X)= (3.0 +/- 1.0 (stat.) +/- 0.3 (syst.))10^{-4} for each lepton species (electron or muon). The lifetime of the Xi_b baryon was measured to be tau_{Xi_b} = 1.45{^{+0.55}_{-0.43}} (stat.) +/- 0.13 (syst.) ps. A combination with the previous DELPHI lifetime measurement gives tau_{Xi_b} = 1.48{^{+0.40}_{-0.31}} (stat.) +/- 0.12 (syst.) ps.

Dates and versions

in2p3-00024940 , version 1 (27-10-2005)

Identifiers

Cite

J. Abdallah, P. Abreu, W. Adam, P. Adzic, T. Albrecht, et al.. Production of $\Xi_c^0$ and $\Xi_b$ in Z decays and lifetime measurement of $\Xi_b$. European Physical Journal C: Particles and Fields, 2005, 44, pp.299-309. ⟨10.1140/epjc/s2005-02388-4⟩. ⟨in2p3-00024940⟩
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