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Observation of the baryonic flavor-changing neutral current decay Λb(0)→Λμ+μ-.

Abstract:

We report the first observation of the baryonic flavor-changing neutral current decay Λ(b)(0)→Λμ(+)μ(-) with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a pp collisions data sample corresponding to 6.8 fb(-1) at √s = 1.96 TeV collected by the CDF II detector at the Tevatron collider. The total and differential branching ratios for Λ(b)(0)→Λμ(+)μ(-) are measured. We find B(Λ(b)(0)→Λμ(+)μ(-))=[1.73 ± 0.42(stat) ± (syst)] × 10(-6). W...

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Journal:
Physical review letters
Volume:
107
Issue:
20
Pages:
201802
Publication date:
2011-11-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:f4d27728-9d16-4a50-8c0d-b3db0b80d37e
Source identifiers:
206448
Local pid:
pubs:206448
Language:
English
Keywords:

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