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PARTIAL BRANCHING FRACTIONS IN ${{\mathit \Lambda}_{{b}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

B( ${{\mathit \Lambda}_{{b}}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ ) (2.0 $<$ q${}^{2}<$ 4.3 GeV${}^{2}$/c${}^{4}$)

INSPIRE   PDGID:

S040PB2

VALUE ($ 10^{-7} $) DOCUMENT ID TECN  COMMENT $\bf{ 0.28 {}^{+0.28}_{-0.21}}$ OUR AVERAGE $0.253$ ${}^{+0.276}_{-0.207}$ $\pm0.046$ 1 AAIJ 2015 AE LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV $1.8$ $\pm1.7$ $\pm0.6$ AALTONEN 2011 AI CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV • • We do not use the following data for averages, fits, limits, etc. • • $0.71$ $\pm0.60$ $\pm0.23$ 2 AAIJ 2013 AJ LHCB Repl. by AAIJ 2015AE 1  AAIJ 2015AE measurement covers 2.0 $<$ q${}^{2}$ $<$ 4.0 GeV${}^{2}$/c${}^{4}$. 2  Uses B( ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \Lambda}}$ ) = ($6.2$ $\pm1.4$) $ \times 10^{-4}$.

References:

AAIJ 2015AE JHEP 1506 115 Differential Branching Fraction and Angular Analysis of ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ Decays Also JHEP 1809 145 (errat.) Differential branching fraction and angular analysis of $\Lambda^{0}_{b} \rightarrow \Lambda \mu^+\mu^-$ decays AAIJ 2013AJ PL B725 25 Measurement of the Differential Branching Fraction of the Decay ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ AALTONEN 2011AI PRL 107 201802 Observation of the Baryonic Flavor-Changing Neutral Current Decay ${{\mathit \Lambda}_{{b}}^{0}}$ $\rightarrow$ ${{\mathit \Lambda}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

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