Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -]
We report the first observation of the baryonic flavor-changing neutral current decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a pp̅ collisions data sample correspon...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
American Physical Society (APS)
2012
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| Online Access: | http://hdl.handle.net/1721.1/69197 https://orcid.org/0000-0002-6047-4211 |
| Summary: | We report the first observation of the baryonic flavor-changing neutral current decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a pp̅ collisions data sample corresponding to 6.8 fb[superscript -1] at √s=1.96 TeV collected by the CDF II detector at the Tevatron collider. The total and differential branching ratios for Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] are measured. We find B(Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -])=[1.73±0.42(stat)±(syst)]×10[superscript -6]. We also report the first measurement of the differential branching ratio of B[subscript s][superscript 0]→ϕμ[superscript +]μ[superscript -], using 49 signal events. In addition, we report branching ratios for B+→K+μ[superscript +]μ[superscript -], B[superscript 0]→K[superscript 0]μ[superscript +]μ[superscript -], and B→K[superscript *](892)μ[superscript +]μ[superscript -] decays. |
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