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Report number arXiv:1408.1137 ; LHCB-PAPER-2014-030 ; CERN-PH-EP-2014-193 ; LHCB-PAPER-2014-030 ; CERN-PH-EP-2014-193
Title First observations of the rare decays $B^+\!\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and $B^+\!\rightarrow\phi K^+\mu^+\mu^-$
Author(s) LHCb collaboration  Mostrar todos os 700 autores
Publication 2014-10-09
Imprint 05 Aug 2014
Number of pages 18
Note Comments: 20 pages with 5 figures
20 pages with 5 figures
In: JHEP 10 (2014) 064
DOI 10.1007/JHEP10(2014)064
Subject category hep-ex ; Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; LHCb
Free keywords flavor physics ; B physics ; rare decay
Abstract First observations of the rare decays $B^+\rightarrow K^+\pi^+\pi^-\mu^+\mu^-$ and $B^+\rightarrow \phi K^+\mu^+\mu^-$ are presented using data corresponding to an integrated luminosity of $3.0\,\mbox{fb}^{-1}$, collected by the LHCb experiment at centre-of-mass energies of $7$ and $8\mathrm{\,TeV}$. The branching fractions of the decays are \begin{eqnarray*} \mathcal{B}(B^+\rightarrow K^+\pi^+\pi^-\mu^+\mu^-) &=& (4.36\,^{+0.29}_{-0.27}\,\mathrm{(stat)}\pm 0.21\,\mathrm{(syst)}\pm0.18\,\mathrm{(norm)})\times10^{-7},
\mathcal{B}(B^+\rightarrow\phi K^+\mu^+\mu^-) &=& (0.82 \,^{+0.19}_{-0.17}\,\mathrm{(stat)}\,^{+0.10}_{-0.04}\,\mathrm{(syst)}\pm0.27\,\mathrm{(norm)}) \times10^{-7},\end{eqnarray*} where the uncertainties are statistical, systematic, and due to the uncertainty on the branching fractions of the normalisation modes. A measurement of the differential branching fraction in bins of the invariant mass squared of the dimuon system is also presented for the decay $B^+\rightarrow K^+\pi^+\pi^-\mu^{+}\mu^{-}$.
Copyright/License publication: © 2014-2025 CERN (License: CC-BY-4.0), sponsored by SCOAP³
preprint: © 2014-2025 CERN (License: CC-BY-4.0)



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 Record created 2014-08-07, last modified 2024-08-17


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