Abstract
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 B0→D* -π +π -π + decay relative to the B0→D* -π + decay is measured to be B(B0→D* -π +π -π +) B(B0→D* -π +)=2.64±0.04(stat)±0. 13(syst). The Cabibbo-suppressed decay B0→D* -K +π -π + is observed for the first time, and the measured ratio of branching fractions is B(B0→D* -K +π -π +)B(B0→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 B0→D* -π +π -π + final state is also performed, and the first observation of the B0→D ̄1 (2420)0π +π - decay is reported with the ratio of branching fractions B(B0→(D ̄1 (2420)0→D* -π +) π -π +)B(B0→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(B0→D ̄1 (2420)0π -π +) and B(D ̄1 (2420)0→D* -π +).
Original language | English |
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Article number | 092001 |
Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volume | 87 |
Issue number | 9 |
DOIs | |
Publication status | Published - 3 May 2013 |
Externally published | Yes |
Bibliographical note
Copyright:Copyright 2013 Elsevier B.V., All rights reserved.
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Physics and Astronomy (miscellaneous)