Measurement of the Λb0 decay form factor

6533b832fe1ef96bd129ae2c

RESEARCH PRODUCT

Measurement of the Λb0 decay form factor

U. Kerzel B. Glob P. Bambade P.s.l. Booth L. Jungermann Marc Winter Nikolaos P. Mastroyiannopoulos K. Hultqvist Rafael Marco H. Wahlen I. Van Vulpen A. Di Simone J. H. Lopes Tiziano Camporesi G. Cosme D. Vilanova P. Antilogus J. Rehn Maarten Boonekamp L. De Paula Ph. Charpentier Petr Travnicek P. Van Dam Borut Paul Kerševan Borut Paul Kerševan M. Chapkin Danilo Zavrtanik M. Moch K. Grzelak Allan Hallgren Clara Troncon A. Behrmann Themistocles Bowcock Tomasz Szumlak U. Schwickerath K. H. Becks Antonio Ferrer M. Feindt G. Valenti W. Liebig Tord Ekelof P. Verdier O. Yushchenko R. Sekulin J. Hoffman J. Dalmau M. Stanitzki P. D. Johansson L. Berntzon T. Spassov Luis Peralta L. Vitale A. Pullia Antonio Baroncelli Petar Adzic T. Alderweireld Ulrich Parzefall Josef Strauss M. Espirito Santo W. Venus R. Gokieli R. Gokieli J. Fernandez Barry King I. A. Tyapkin Javier Cuevas Daniel Wicke D. Bertrand Jiri Chudoba Nathalie Besson J. Piedra Jiri Masik M. Bracko J. Guy Göran Jarlskog J. Timmermans Phillip Allport B. Tome P. Rebecchi T. Moa Th. D. Papadopoulou Klaus Hamacher W. A. Mitaroff Andre Sopczak M. Berggren V. Verzi M. Nikolenko M. Nikolenko D. Ryabtchikov Vaclav Vrba Paolo Ronchese Piotr Zalewski Marek Szczekowski M. Zupan Guillelmo Gomez-ceballos V. Poireau A. N. Sisakian R. Reinhardt A. Sadovsky J. H. Wickens B. Muryn Marco Paganoni Maria Elena Pol Filipe Veloso P. Buschmann S. Todorovova Francisco Matorras José Salt A. Markou S. Maltezos F. Richard C. Matteuzzi F. Fulda-quenzer F. Pierre N. J. Kjaer Vincent Hedberg Tiziano Rovelli Michal Bluj J. Lamsa S. Katsanevas R. Barbier C. Weiser K. Osterberg A. Oblakowska-mlucha E. Graziani J. M. Brunet H. Foeth C. Haag N. Van Remortel N. I. Zimin D. Y. Bardin Oliver Passon A. Miagkov L. Ramler G. Borisov Patrick Jarry G. Grosdidier R. Sosnowski U. Mjoernmark Dietrich Liko A. Van Lysebetten G. Polok M. Trochimczuk M. Bonesini J-c. Marin R. Monge D. Moraes L. Bugge P. Jonsson Valeriy Pozdniakov M. Nassiakou Nuno Filipe Castro N. Pukhaeva N. Pukhaeva M. Witek P. Goncalves W. Da Silva A. Passeri Christine Kourkoumelis Oxana Smirnova A. De Angelis P. Collins J. D'hondt U. Mueller Diego Rodriguez Daniel Bloch Salvador Carrillo Moreno M. L. Turluer D. Reid Martijn Mulders E. Brodet T. Myklebust Luc Pape Nicola Amapane M. Rivero M. Blom M. Margoni A. Savoy-navarro B. Crawley Marco Costa Ahmimed Ouraou F. Hauler A. Petrolini E. Fokitis G. Tristram L. Pieri Ernesto Migliore Daniel Jeans V. Obraztsov T. Allmendinger G. Wilkinson J. E. Augustin V.a. Uvarov Daniel Treille Manolis Dris P. Roudeau Andrea Perrotta J. Ridky E. Piotto M. Tobin B. De Lotto Georgios Fanourakis C. Parkes A. Malek Alberto Benvenuti Alessandra Romero H. Palka M. Gandelman Mattias Ellert Peter Kluit J. N. Jackson J. Rames Fabrizio Ferro Paolo Morettini Jalal Abdallah A. Tonazzo A. G. Olshevski H. Herr L. G. Tkatchev A. Sokolov Andre Augustinus T. Albrecht P. Lutz M. Begalli E. Ben-haim Keith Hamilton Krzysztof Nawrocki Wolfgang Adam Markus Elsing P. B. Renton B. Stugu M. Hennecke Paul Baillon Alexander Lincoln Read M. Szeptycka Marc Besancon W. T. Meyer P. Kokkinias A. Onofre Corinne Berat Olga Botner Carmen García Marco Battaglia A. C. Taffard J. P. Palacios F. Carena Roberto Chierici C. Martinez-rivero G. Della Ricca M. Baubillier Achille Stocchi Luiz Mundim F. Kapusta R. Alemany-fernandez G. Leder R. Contri Evangelos Gazis T. Da Silva S. O. Holmgren A. Ballestrero K. Muenich O.m. Kouznetsov E. K. Johansson B. Marechal E. C. Katsoufis Rosy Nicolaidou Marta Calvi R. Orava A. Zalewska B. ÅSman L. Salmi F. Parodi G. Kernel V. Perepelitsa V. Lepeltier M. Siebel P. Tyapkin Y. Arnoud Ugo Amaldi W. De Boer B. Bouquet Paolo Checchia Ph. Gavillet D. Crennell Louis Lyons E. I. Rosenberg Vincenzo Canale Jesus Marco F. Mandl G. Smadja L. Di Ciaccio J. Macnaughton A. Oyanguren S. U. Chung P. J. Holt A. M. Segar K. Cieslik Dimitrios Fassouliotis G. Eigen Rupert Leitner Demetrios Loukas P. Poropat R. Mcnulty Juan Fuster Klaus Moenig M. A. Houlden T. Tabarelli Fabio Cossutti S. Ask J. Montenegro Igor Boyko T. Lesiak Richard Brenner F. Tegengeldt V. Ruhlmann-kleider Chiara Mariotti N. Benekos M. Mazzucato J. Van Eldik F. Ledroit Jacques Lemonne Francesca Romana Cavallo S. Tzamarias A. J. Washbrook C. De Clercq M. Kucharczyk W. J. Murray S. Haug P. V. Chliapnikov Krzysztof Doroba Chiara Meroni P. Bruckman P. Abreu F. Mazzucato G. Vegni Gareth J. Barker A. Kiiskinen M. Pimenta Sandra Amato T. Podobnik Francesco Navarria Pablo Tortosa A. Zintchenko V. Zhuravlov L. Leinonen J. M. Lopez Z. Krumstein S. Paiano A. De Min U. Flagmeyer N. De Maria Anna Lipniacka C. Joram J. Drees J. Drees G. Myatt

subject

Semileptonic decay Physics Particle physics Nuclear and High Energy Physics 010308 nuclear & particles physics Branching fraction Electron–positron annihilation Hadron Lambda Lambda baryon 01 natural sciences Nuclear physics Baryon 0103 physical sciences 010306 general physics Lepton

description

The form factor of Λb0 baryons is estimated using 3.46×106 hadronic Z decays collected by the DELPHI experiment between 1992 and 1995. Charmed Λc+ baryons fully reconstructed in the pK-π+, pK S0, and Λπ+π+π - modes, are associated to a lepton with opposite charge in order to select Λb0→Λc+l-ν̄l decays. From a combined likelihood and event rate fit to the 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 ρ̂2=2.03±0.46(stat) -1.00+0.72(syst). The exclusive semileptonic branching fraction Br(Λb0→Λc+l-ν̄l) can be derived from ρ̂2 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. © 2004 Published by Elsevier B.V.

year	journal	country	edition	language
2004-04-01

10.1016/j.physletb.2004.01.086 http://hdl.handle.net/10281/155895