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cc by (c) CERN; LHCb Collaboration, 2013
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/131834

Study of B0→D*-π+π-π+ and B0→D*-K+π-π+ decays

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Using proton-proton collision data collected by the LHCb experiment at √ s = 7     TeV , corresponding to an integrated luminosity of 1.0     fb − 1 , the ratio of branching fractions of the B 0 → D * − π + π − π + decay relative to the B 0 → D * − π + decay is measured to be B ( B 0 → D * − π + π − π + ) B ( B 0 → D * − π + ) = 2.64 ± 0.04 ( stat ) ± 0.13 ( syst ) . The Cabibbo-suppressed decay B 0 → D * − K + π − π + is observed for the first time, and the measured ratio of branching fractions is B ( B 0 → D * − K + π − π + ) B ( B 0 → D * − π + π − π + ) = ( 6.47 ± 0.37 ( stat ) ± 0.35 ( syst ) ) × 10 − 2 . A search for orbital excitations of charm mesons contributing to the B 0 → D * − π + π − π + final state is also performed, and the first observation of the B 0 → ¯¯¯ D 1 ( 2420 ) 0 π + π − decay is reported with the ratio of branching fractions B ( B 0 → ( ¯¯¯ D 1 ( 2420 ) 0 → D * − π + ) π − π + ) B ( B 0 → D * − π + π − π + ) = ( 2.04 ± 0.42 ( stat ) ± 0.22 ( syst ) ) × 10 − 2 , where the numerator represents a product of the branching fractions B ( B 0 → ¯¯¯ D 1 ( 2420 ) 0 π − π + ) and B ( ¯¯¯ D 1 ( 2420 ) 0 → D * − π + ) .

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CAMBONI, Alessandro, COMERMA MONTELLS, Albert, GARRIDO BELTRÁN, Lluís, GRACIANI DÍAZ, Ricardo, GRAUGÉS POUS, Eugeni, LÓPEZ ASAMAR, Elias, PICATOSTE OLLOQUI, Eduardo, POTTERAT, Cédric, RUIZ, Hugo (ruiz pérez), VÁZQUEZ GÓMEZ, Ricard, ABELLAN BETETA, Carlos, CALVO GÓMEZ, Míriam, VILASIS-CARDONA, Xavier, DOMINGO BONAL, Francesc, LHCb Collaboration. Study of B0→D*-π+π-π+ and B0→D*-K+π-π+ decays. _Physical Review D_. 2013. Vol. 87, núm. 9, pàgs. 092001. [consulta: 27 de febrer de 2026]. ISSN: 1550-7998. [Disponible a: https://hdl.handle.net/2445/131834]

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