Measurement of the branching fraction B(Λb0→Λc+π-π+π-) at CDF

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URI: http://hdl.handle.net/10902/2189
ISSN: 1550-7998
ISSN: 1550-2368
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Autoría
Aaltonen, Timo Antero; Álvarez González, Bárbara; Amidei, Dante; Anastassov, Anton; Annovi, Alberto; Antos, Jaroslav; Apollinari, Giorgio; Appel, Jeffrey A.; Casal Laraña, Bruno; Cuevas Maestro, Francisco Javier; Gómez Gramuglio, GervasioAutoridad Unican; Palencia Cortezón, José Enrique; Rodrigo Anoro, TeresaAutoridad Unican; Ruiz Jimeno, AlbertoAutoridad Unican; Scodellaro, LucaAutoridad Unican; Vila Álvarez, Iván Autoridad Unican; Vilar Cortabitarte, RocíoAutoridad Unican; Vizán García, Jesús ManuelAutoridad Unican; Arisawa, Tetsuo; [et al.]
Fecha
2012-02-13
Derechos
© 2012 American Physical Society
Publicado en
Physical review. D, Particles, fields, gravitation, and cosmology, vol. 85, iss. 3, art. num. 032003 (2012)
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American Physical Society
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Resumen/Abstract
We report an analysis of the Λb0→Λc+π-π+π- decay in a data sample collected by the CDF II detector at the Fermilab Tevatron corresponding to 2.4  fb-1 of integrated luminosity. We reconstruct the currently largest samples of the decay modes Λb0→Λc(2595)+π- (with Λc(2595)+→Λc+π+π-), Λb0→Λc(2625)+π- (with Λc(2625)+→Λc+π+π-), Λb0→Σc(2455)++π-π- (with Σc(2455)++→Λc+π+), and Λb0→Σc(2455)0π+π- (with Σc(2455)0→Λc+π-) and measure the branching fractions relative to the Λb0→Λc+π- branching fraction. We measure the ratio B(Λb0→Λc+π-π+π-)/ B(Λb0→Λc+π-)=3.04±0.33(stat)-0.55+0.70(syst) which is used to derive B(Λb0→Λc+π-π+π-)=(26.8-11.2+11.9)×10-3.
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