Evidence for the decay $B_c^{+}\to J/\psi 3{\pi }^{+}2{\pi }^{-}$

Abstract

Evidence is presented for the decay $B_c+\to J/\psi 3{\pi }^{+}2{\pi }^{-}$ using proton-proton collision data, corresponding to an integrated luminosity of 3fb${}^{-1}$, collected with the LHCb detector. A signal yield of $32\pm 8$ decays is found with a significance of 4.5 standard deviations. The ratio of the branching fraction of the $B_c^{+}\to J/\psi 3{\pi }^{+}2{\pi }^{-}$ decay to that of the $B_c^{+}\to J/\psi {\pi }^{+}$ decay is measured to be $$\frac{Br(B_c^{+}\to J/\psi 3{\pi }^{+}2{\pi }^{)}}{Br(B_c^{+}\to J/\psi {\pi }^{+})}=1.74\pm 0.44\pm 0.24,$$ where the first uncertainty is statistical and the second is systematic.

arXiv comment12 pages, 3 figures

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Cited by in corpus (14)

• Observation of an excited $B_c^{+}$ state
• Measurement of the lifetime of the $B_c^{+}$ meson using the $B_c^{+}\to J/\psi {\pi }^{+}$ decay mode
• Measurement of the ratio of $B_c^{+}$ branching fractions to $J/\psi {\pi }^{+}$ and $J/\psi {\mu }^{+}{\nu }_{\mu }$
• First observation of a baryonic $B_c^{+}$ decay
• Observation of ${\Lambda }_b^0\to \psi (2S)p{K}^{-}$ and ${\Lambda }_b^0\to J/\psi {\pi }^{+}{\pi }^{-}p{K}^{-}$ decays and a measurement of the ${\Lambda }_b^0$ baryon mass
• Weak decays of doubly heavy baryons: decays to system of $\pi$ mesons
• Measurement of the branching fraction ratio $\mathcal{B}(B_c^{+}\to \psi (2S){\pi }^{+})/\mathcal{B}(B_c^{+}\to J/\psi {\pi }^{+})$
• Observation of $B_c^{+}\to J/\psi D^{(\ast )}{K}^{(\ast )}$ decays
• Radiative Leptonic $B_c\to \gamma \ell \bar{\nu }$ Decay in Effective Field Theory beyond Leading Order
• Heavy Flavour Physics at the LHC
• The rare semi-leptonic $B_c$ decays involving orbitally excited final mesons
• Excited $\rho$ mesons in $B_c\to {\psi }^{{(}^{\prime })}K{K}_S$ decays
• b and c hadron spectroscopy at LHCb
• Flavor Dependent Effects on Rare Weak Decays of $B_c^{\ast }$ and $B_s^{\ast }$ Mesons