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Measurement of the lifetime of the Bc+ meson using the Bc+→J/ψπ+ decay mode
- Source :
- Physics Letters B, Vol 742, Iss , Pp 29-37 (2015)
- Publication Year :
- 2015
- Publisher :
- Elsevier, 2015.
-
Abstract
- The difference in total widths between the Bc+ and B+ mesons is measured using a data sample corresponding to an integrated luminosity of 3.0 fb−1 collected by the LHCb experiment in 7 and 8 TeV centre-of-mass energy proton–proton collisions at the LHC. Through the study of the time evolution of Bc+→J/ψπ+ and B+→J/ψK+ decays, the width difference is measured to beΔΓ≡ΓBc+−ΓB+=4.46±0.14±0.07 mm−1c, where the first uncertainty is statistical and the second systematic. The known lifetime of the B+ meson is used to convert this to a precise measurement of the Bc+ lifetime,τBc+=513.4±11.0±5.7 fs, where the first uncertainty is statistical and the second is systematic.
Details
- Language :
- English
- ISSN :
- 03702693
- Volume :
- 742
- Issue :
- 29-37
- Database :
- Directory of Open Access Journals
- Journal :
- Physics Letters B
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.323213d6f01d4089afbce661e79e96d5
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.physletb.2015.01.010