Abazov, V. M. ; Mondal, N. K. ; et., al (2007) Measurement of the Λb lifetime in the exclusive decay Λb→J/ψΛ Physical Review Letters, 99 (14). 142001_1-142001_7. ISSN 0031-9007
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Official URL: http://prl.aps.org/abstract/PRL/v99/i14/e142001
Related URL: http://dx.doi.org/10.1103/PhysRevLett.99.142001
Abstract
We have measured the Λb lifetime using the exclusive decay Λb→J/ψΛ, based on 1.2 fb-1 of data collected with the D0 detector during 2002-2006. From 171 reconstructed Λb decays, where the J/ψ and Λ are identified via the decays J/ψ→μ+μ- and Λ→pπ, we measured the Λb lifetime to be τ(Λb)=1.218-0.115+0.130(stat)±0.042(syst) ps. We also measured the B0 lifetime in the decay B0→J/ψ(μ+μ-)KS0(π+π-) to be τ(B0)=1.501-0.074+0.078(stat)± 0.050(syst) ps, yielding a lifetime ratio of τ(Λb)/τ(B0)=0.811-0.087+0.096(stat)± 0.034(syst).
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 66904 |
| Deposited On: | 27 Oct 2011 11:37 |
| Last Modified: | 27 Oct 2011 11:37 |
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