Abazov, V. M. ; Mondal, N. K. ; et, al (2011) Measurement of the production fraction times branching fraction f(b→Λb).B(Λb→J/ψΛ) Physical Review D - Particles, Fields, Gravitation and Cosmology, 84 (3). 031102_1-031102_7. ISSN 1550-7998
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Official URL: http://prd.aps.org/abstract/PRD/v84/i3/e031102
Related URL: http://dx.doi.org/10.1103/PhysRevD.84.031102
Abstract
The λb(udb) baryon is observed in the decay λb→J/ψλ using 6.1fb−1 of pp̅ collisions collected with the D0 detector at √s=1.96 TeV. The production fraction multiplied by the branching fraction for this decay relative to that for the decay B0→J/ψKs0 is measured to be 0.345±0.034(stat)±0.033(syst)±0.003(PDG). Using the world average value of f(b→B0).B(B0→J/ψKs0)=(1.74±0.08)×10−5, we obtain f(b→λb).B(λb→J/ψλ)=(6.01±0.60(stat)±0.58(syst)±0.28(PDG))×10−5. This measurement represents an improvement in precision by about a factor of 3 with respect to the current world average.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to The American Physical Society. |
| ID Code: | 76202 |
| Deposited On: | 31 Dec 2011 08:24 |
| Last Modified: | 31 Dec 2011 08:24 |
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