Journal article

### First observation of B0 s→D*s2+Xμν̄- decays

Abstract:

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays B0s→D+s+Xμν̄ and B0s→D0K+Xμν̄ are detected. Two structures are observed in the D0K+ mass spectrum at masses consistent with the known Ds1(2536)+ and Ds2*(2573)+ mesons. The measured branching fractions relative to the total B-s0 semileptonic rate are B(B0s→Ds2*+Xμν̄)/B(B0s→Xμν̄)=(3.3±1.0±0.4)%, and B(B0s→D+s1Xμν̄)/B(B0s→Xμν̄)=(5.4±1.2±0.5)%, where the first unce...

### Authors

Journal:
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume:
698
Issue:
1
Pages:
14-20
Publication date:
2011-03-28
DOI:
ISSN:
0370-2693
URN:
uuid:e03b285d-0bca-486d-b18a-a90ffe53a628
Source identifiers:
134493
Local pid:
pubs:134493
Language:
English
Keywords: