The form factor of A(o)(b) baryons is estimated using 3.46 x 10(6) hadronic Z decays collected by the DELPM experiment between 1992 and 1995. Charmed A(c)(+) baryons fully reconstructed in the pK(-)pi(+), pK(o)(s), and Api(+)pi(+)pi(-) modes, are associated to a c S lepton with opposite charge in order to select A(o)(b) --> A(c)(+)l(-)v(l) decays. From a combined likelihood and event rate fit to the b C distribution of the Isgur-Wise variable w, and using the Heavy Quark Effective Theory (HQET), the slope of the b-baryon form factor is measured to be p(2)=2.03+/-0.46(stat)(-1.00)(+0.72)(syst). The exclusive semileptonic branching fraction Br(A(b)(o) --> A(c)(+)l(-)v(l)) can be derived from p(2) and is found to be (5.0(-0.8)(+1.1)(stat)(-1.2)(+1.6) (syst))\%. Limits on other branching fractions are also obtained. (C) 2004 Published by Elsevier B.V.

Measurement of the Lambda(0)(b) decay form factor

AMAPANE, Nicola Carlo;MIGLIORE, Ernesto;ROMERO, Alessandra;
2004-01-01

Abstract

The form factor of A(o)(b) baryons is estimated using 3.46 x 10(6) hadronic Z decays collected by the DELPM experiment between 1992 and 1995. Charmed A(c)(+) baryons fully reconstructed in the pK(-)pi(+), pK(o)(s), and Api(+)pi(+)pi(-) modes, are associated to a c S lepton with opposite charge in order to select A(o)(b) --> A(c)(+)l(-)v(l) decays. From a combined likelihood and event rate fit to the b C distribution of the Isgur-Wise variable w, and using the Heavy Quark Effective Theory (HQET), the slope of the b-baryon form factor is measured to be p(2)=2.03+/-0.46(stat)(-1.00)(+0.72)(syst). The exclusive semileptonic branching fraction Br(A(b)(o) --> A(c)(+)l(-)v(l)) can be derived from p(2) and is found to be (5.0(-0.8)(+1.1)(stat)(-1.2)(+1.6) (syst))\%. Limits on other branching fractions are also obtained. (C) 2004 Published by Elsevier B.V.
2004
585
63
84
J Abdallah; P Abreu; W Adam; P Adzic; T Albrecht; T Alderweireld; R Alemany-Fernandez; T Allmendinger; PP Allport; U Amaldi; N Amapane; S Amato; E Anashkin; A Andreazza; S Andringa; N Anjos; P Antilogus; WD Apel; Y Arnoud; S Ask; B Asman; JE Augustin; S Augustinus; P Baillon; A Ballestrero; P Bambade; R Barbier; D Bardin; G Barker; A Baroncelli; M Battaglia; M Baubillier; KH Becks; M Begalli; A Behrmann; E Ben-Haim; N Benekos; A Benvenuti; C Berat; M Berggren; L Berntzon; D Bertrand; M Besancon; N Besson; D Bloch; M Blom; M Bluj; M Bonesini; M Boonekamp; PSL Booth; G Borisov; O Botner; B Bouquet; TJV Bowcock; I Boyko; M Bracko; R Brenner; E Brodet; P Bruckman; JM Brunet; L Bugge; P Buschmann; M Calvi; T Camporesi; V Canale; F Carena; N Castro; F Cavallo; M Chapkin; P Charpentier; P Checchia; R Chierici; P Chliapnikov; J Chudoba; SU Chung; K Cieslik; P Collins; R Contri; G Cosme; F Cossutti; MJ Costa; B Crawley; D Crennell; J Cuevas; J D'Hondt; J Dalmau; T da Silva; W Da Silva; 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; MCE Santo; G Fanourakis; D Fassouliotis; M Feindt; J Fernandez; A Ferrer; F Ferro; U Flagmeyer; H Foeth; E Fokitis; F Fulda-Quenzer; J Fuster; M Gandelman; C Garcia; P Gavillet; E Gazis; R Gokieli; B Golob; G Gomez-Ceballos; P Goncalves; E Graziani; G Grosdidier; K Grzelek; J Guy; C Haag; A Hallgren; K Hamacher; K Hamilton; S Haug; F Hauler; V Hedberg; M Hennecke; H Herr; J Hoffman; SO Holmgren; PJ Holt; MA Houlden; K Hultqvist; JN Jackson; G Jarlskog; P Jarry; D Jeans; EK Johansson; PD Johansson; P Jonsson; C Joram; L Jungermann; F Kapusta; S Katsanevas; E Katsoufis; G Kernel; BP Kersevan; U Kerzel; A Kiiskinen; BT King; NJ Kjaer; P Kluit; P Kokkinias; C Kourkoumelis; O Kouznetsov; Z Krumstein; M Kucharczyk; J Lamsa; G Leder; F Ledroit; L Leinonen; R Leitner; J Lemonne; V Lepeltier; T Lesiak; W Liebig; D Liko; A Lipniacka; JH Lopes; JM Lopez; D Loukas; P Lutz; L Lyons; J MacNaughton; A Malek; S Maltezos; F Mandl; J Marco; R Marco; B Marechal; M Margoni; JC Marin; C Mariotti; A Markou; C Martinez-Rivero; J Masik; N Mastroyiannopoulos; F Matorras; C Matteuzzi; F Mazzucato; M Mazzucato; R McNulty; C Meroni; WT Meyer; A Miagkov; 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; A Oblakowska-Mucha; V Obraztsov; A Olshevski; A Onofre; R Orava; K Osterberg; A Ouraou; A Oyanguren; M Paganoni; S Paiano; JP Palacios; H Palka; TD 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; ME 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; J Ridky; M Rivero; D Rodriguez; A Romero; P Ronchese; E Rosenberg; P Roudeau; T Rovelli; V Ruhlmann-Kleider; D Ryabtchikov; A Sadovsky; L Salmi; J Salt; A Savoy-Navarro; U Schwickerath; A Segar; R Sekulin; M Siebel; A Sisakian; G Smadja; O Smirnova; A Sokolov; A Sopczak; R Sosnowski; T Spassov; M Stanitzki; A Stocchi; J Strauss; B Stugu; M Szczekowski; M Szeptycka; T Szumlak; T Tabarelli; AC Taffard; F Tegenfeldt; J Timmermans; L Tkatchev; M Tobin; S Todorovova; B Tome; A Tonazzo; P Tortosa; P Travnicek; D Treille; G Tristram; M Trochimczuk; C Troncon; ML Turluer; IA Tyapkin; P Tyapkin; S Tzamarias; V Uvarov; G Valenti; P Van Dam; J Van Eldik; A Van Lysebetten; N van Remortel; I VanVulpen; G Vegni; F Veloso; W Venus; P Verdier; V Verzi; D Vilanova; L Vitale; V Vrba; H Wahlen; AJ Washbrook; C Weiser; D Wicke; J Wickens; G Wilkinson; M Winter; M Witek; O Yushchenko; A Zalewska; P Zalewski; D Zavrtanik; V Zhuravlov; NI Zimin; A Zintchenko; M Zupan
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/51686
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 32
  • ???jsp.display-item.citation.isi??? 31
social impact