Study of B[superscript 0]→D[superscript *-]π[superscript +]π[superscript -]π[superscript +} and B[superscript 0]→D[superscript *-]K[superscript +]π[superscript -]π[superscript +] decays
Using proton-proton collision data collected by the LHCb experiment at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb[superscript -1], the ratio of branching fractions of the B[superscript 0]→D[superscript *-]π[superscript +]π[superscript -]π[superscript +] decay relative to the B[s...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2013
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| Online Access: | http://hdl.handle.net/1721.1/80799 https://orcid.org/0000-0001-8285-3346 |
| Summary: | Using proton-proton collision data collected by the LHCb experiment at √s=7 TeV, corresponding to an integrated luminosity of 1.0 fb[superscript -1], the ratio of branching fractions of the B[superscript 0]→D[superscript *-]π[superscript +]π[superscript -]π[superscript +] decay relative to the B[superscript 0]→D[superscript *-]π[superscript +] decay is measured to be B(B[superscript 0]→D[superscript *-]π[superscript +]π[superscript -]π[superscript +])/B(B[superscript 0]→D[superscript *-]π[superscript +])=2.64±0.04(stat)±0.13(syst). The Cabibbo-suppressed decay B[superscript 0]→D[superscript *-]K[superscript +]π[superscript -]π[superscript +] is observed for the first time, and the measured ratio of branching fractions is B(B[superscript 0]→D[superscript *-]K[superscript +]π[superscript -]π[superscript +])/B(B[superscript 0]→D[superscript *-]π[superscript +]π[superscript -]π[superscript +])=(6.47±0.37(stat)±0.35(syst))×10[superscript -2]. A search for orbital excitations of charm mesons contributing to the B[superscript 0]→D[superscript *-]π[superscript +]π[superscript -]π[superscript +] final state is also performed, and the first observation of the B[superscript 0]→D̅[subscript 1](2420)[superscript 0]π[superscript +]π[superscript -] decay is reported with the ratio of branching fractions B(B[superscript 0]→(D̅[subscript 1](2420)[superscript 0]→D[superscript *-]π[superscript +])π[superscript -]π[superscript +])/B(B[superscript 0]→D[superscript *-]π[superscript +]π[superscript -]π[superscript +])=(2.04±0.42(stat)±0.22(syst))×10[superscript -2], where the numerator represents a product of the branching fractions B(B[superscript 0]→D̅[subscript 1](2420)[superscript 0]π[superscript -]π[superscript +]) and B(D̅[subscript 1](2420)[superscript 0]→D[superscript *-]π[superscript +]). |
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