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Study of $B^{0} \rightarrow D^{*-}\pi^{+}\pi^{-}\pi^{+}$ and $B^{0} \rightarrow D^{*-}K^{+}\pi^{-}\pi^{+}$ decays / LHCb Collaboration
Using proton-proton collision data collected by the LHCb experiment at $\sqrt{s} =$ 7 TeV, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, the ratio of branching fractions of the $B^{0}\rightarrow D^{*-}\pi^{+}\pi^{-}\pi^{+}$ decay relative to the $B^{0} \rightarrow D^{*-}\pi^{+}$ decay is measured to be \begin{equation*} \frac{\mathcal{B}(B^{0}\rightarrow D^{*-}\pi^{+}\pi^{-}\pi^{+})}{\mathcal{B}(B^{0} \rightarrow D^{*-}\pi^{+})} = 2.64 \pm 0.04\,(\text{stat.}) \pm 0.13\,(\text{syst.})\, . \label{eq:CF_BF_ratio_result} \end{equation*} The Cabibbo-suppressed decay $B^{0}\rightarrow D^{*-}K^{+}\pi^{-}\pi^{+}$ is observed for the first time and the measured ratio of branching fractions is \begin{equation*} \frac{\mathcal{B}(B^{0}\rightarrow D^{*-}K^{+}\pi^{-}\pi^{+})}{\mathcal{B}(B^{0} \rightarrow D^{*-}\pi^{+}\pi^{-}\pi^{+})} = (6.47 \pm 0.37\,(\text{stat.}) \pm 0.35\,(\text{syst.})) \times 10^{-2} \label{eq:CS_BF_ratio_result}\, . [...]
arXiv:1303.6861; LHCB-PAPER-2012-046; CERN-PH-EP-2013-041; CERN-EP-PH-2013-041; LHCB-PAPER-2012-046; CERN-PH-EP-2013-041.- Geneva : CERN, 2013-05-03 - 10 p. - Published in : Phys. Rev. D 87 (2013) 092001 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Measurement of the $B^0 \to K^{*0}e^+e^-$ branching fraction at low dilepton mass / LHCb Collaboration
The branching fraction of the rate decay $B^0 \rightarrow K^{*0}e^+e^-$ in the dilepton mass region from 30 to 1000 MeV$/c^2$ has been measured by the LHCb experiment, using $pp$ collision data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, at a centre-of-mass energy of 7 TeV. The decay mode $B^0 \rightarrow J/\psi(e^+e^-) K^{*0}$ is utilized as a normalization channel. [...]
arXiv:1304.3035; LHCB-PAPER-2013-005; CERN-PH-EP-2013-048; LHCB-PAPER-2013-005-CERN-PH-EP-2013-048; LHCB-PAPER-2013-005; CERN-PH-EP-2013-048.- Geneva : CERN, 2013 - 13 p. - Published in : JHEP 05 (2013) 159 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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Measurements of the branching fractions of $B^{+} \to p \bar{p} K^{+}$ decays / LHCb Collaboration
The branching fractions of the decay $B^{+} \to p \bar p K^{+}$ for different intermediate states are measured using data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected by the LHCb experiment. The total branching fraction, its charmless component $(M_{p\bar p} <2.85 $ $ GeV/c^{2})$ and the branching fractions via the resonant $c\bar c$ states $\eta_{c}(1S)$ and $\psi(2S)$ relative to the decay via a $J/\psi$ intermediate state are \begin{align*} \frac{{\mathcal B}(B^{+} \to p \bar p K^{+})_{total}}{{\mathcal B}(B^{+} \to J/\psi K^{+} \to p \bar p K^{+})}=& \, 4.91 \pm 0.19 \, {(\rm stat)} \pm 0.14 \, {(\rm syst)},\\ \frac{{\mathcal B}(B^{+} \to p \bar p K^{+})_{M_{p\bar p} <2.85 {GeV/}c^{2}}}{{\mathcal B}(B^{+} \to J/\psi K^{+} \to p \bar p K^{+})}=& \, 2.02 \pm 0.10 \, {(\rm stat)}\pm 0.08 \, {(\rm syst)},\\ \frac{{\mathcal B} (B^{+} \to \eta_{c}(1S) K^{+} \to p \bar p K^{+})}{{\mathcal B}(B^{+} \to J/\psi K^{+} \to p \bar p K^{+})} = & \, 0.578 \pm 0.035 \, {(\rm stat)} \pm 0.027 \, {(\rm syst)},\\ \frac{{\mathcal B} (B^{+} \to \psi(2S) K^{+} \to p \bar p K^{+})}{{\mathcal B}(B^{+} \to J/\psi K^{+} \to p \bar p K^{+})}=& \, 0.080 \pm 0.012 \, {(\rm stat)} \pm 0.009 \, {(\rm syst)}.\\ \end{align*} Upper limits on the $B^{+}$ branching fractions into the $\eta_{c}(2S)$ meson and into the charmonium-like states $X(3872)$ and $X(3915)$ are also obtained..
arXiv:1303.7133; LHCB-PAPER-2012-047; CERN-PH-EP-2013-040; LHCB-PAPER-2012-047; CERN-PH-EP-2013-040.- Geneva : CERN, 2013-06-13 - 14 p. - Published in : Eur. Phys. J. C 73 (2013) 2462 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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Measurement of $CP$ violation and the $B_s^0$ meson decay width difference with $B_s^0 \to J/\psi K^+K^-$ and $B_s^0\to J/\psi\pi^+\pi^-$ decays / LHCb Collaboration
The time-dependent $CP$ asymmetry in $B_s^0\to J/\psi K^+K^-$ decays is measured using $pp$ collision data at $\sqrt{s}=7$TeV, corresponding to an integrated luminosity of 1.0$fb^{-1}$, collected with the LHCb detector. The decay time distribution is characterised by the decay widths $\Gamma_{\mathrm{L}}$ and $\Gamma_{\mathrm{H}}$ of the light and heavy mass eigenstates of the $B_s^0$--$\overline{B}_s^0$ system and by a $CP$ -violating phase $\phi_s$. [...]
arXiv:1304.2600; CERN-PH-EP-2013-055; LHCB-PAPER-2013-002; CERN-PH-EP-2013-055; LHCB-PAPER-2013-002.- Geneva : CERN, 2013-06-21 - 21 p. - Published in : Phys. Rev. D 87 (2013) 112010 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Search for $CP$ violation in $D^{+} \to \phi \pi^{+}$ and $D_{s}^{+} \to K^{0}_{S} \pi^{+}$ decays / LHCb Collaboration
A search for $CP$ violation in $D^{+} \to \phi \pi^{+}$ decays is performed using data collected in 2011 by the LHCb experiment corresponding to an integrated luminosity of 1.0 fb$^{-1}$ at a centre of mass energy of 7 TeV. The $CP$-violating asymmetry is measured to be $(-0.04 \pm 0.14 \pm 0.14)$% for candidates with $K^{-}K^{+}$ mass within 20 MeV$/c^{2}$ of the $\phi$ meson mass. [...]
arXiv:1303.4906; CERN-PH-EP-2013-021; LHCB-PAPER-2012-052; CERN-PH-EP-2013-021; LHCB-PAPER-2012-052.- Geneva : CERN, 2013-06-28 - 22 p. - Published in : JHEP 06 (2013) 112 Fulltext: PDF; Related data file(s): ZIP; Springer Open Access article: PDF; External link: Preprint

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Observation of the suppressed ADS modes $B^\pm \to [\pi^\pm K^\mp \pi^+\pi^-]_D K^\pm$ and $B^\pm \to [\pi^\pm K^\mp \pi^+\pi^-]_D \pi^\pm$ / LHCb Collaboration
An analysis of $B^{\pm}\to DK^{\pm}$ and $B^{\pm}\to D\pi^{\pm}$ decays is presented where the $D$ meson is reconstructed in the four-body final state $K^{\pm}\pi^{\mp} \pi^+ \pi^-$. Using LHCb data corresponding to an integrated luminosity of $1.0{\rm \,fb}^{-1}$, first observations are made of the suppressed ADS modes $B^{\pm}\to [\pi^{\pm} K^{\mp}\pi^+\pi^-]_D K^{\pm}$ and $B^{\pm}\to [\pi^{\pm} K^{\mp} \pi^+\pi^- ]_D\pi^{\pm}$ with a significance of $5.1\sigma$ and greater than $10\sigma$, respectively. [...]
arXiv:1303.4646; CERN-PH-EP-2013-038; LHCB-PAPER-2012-055; CERN-PH-EP-2013-038; LHCB-PAPER-2012-055.- Geneva : CERN, 2013-06-10 - 14 p. - Published in : Phys. Lett. B 723 (2013) 44-53 Elsevier Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Search for rare $B^0_{(s)}\rightarrow \mu^+ \mu^- \mu^+ \mu^-$ decays / LHCb Collaboration
A search for the decays $B^0_{s}\rightarrow \mu^+ \mu^- \mu^+ \mu^-$ and $B^0 \rightarrow \mu^+ \mu^- \mu^+ \mu^-$ is performed using data, corresponding to an integrated luminosity of 1.0 fb$^{-1}$, collected with the LHCb detector in 2011. The number of candidates observed is consistent with the expected background and, assuming phase-space models of the decays, limits on the branching fractions are set: ${\cal B}(B^0_{s}\rightarrow \mu^+ \mu^- \mu^+ \mu^-) < 1.6 \ (1.2) \times 10^{-8}$ and ${\cal B}(B^0 \rightarrow \mu^+ \mu^- \mu^+ \mu^-)< 6.6 \ (5.3) \times 10^{-9}$ at 95% (90%) confidence level. [...]
arXiv:1303.1092; CERN-PH-EP-2013-031; LHCB-PAPER-2012-049; CERN-PH-EP-2013-031; LHCB-PAPER-2012-049.- Geneva : CERN, 2013 - 6 p. - Published in : Phys. Rev. Lett. 110 (2013) 1528276 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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First observations of $\bar{B}_s^0\to D^+D^-$, $D_s^+D^-$ and $D^0\bar{D}^0$ decays / LHCb Collaboration
First observations and measurements of the branching fractions of the $\bar{B}_s^0\to D^+D^-$, $\bar{B}_s^0\to D_s^+D^-$ and $\bar{B}_s^0\to D^0\bar{D}^0$ decays are presented using $1.0$~fb$^{-1}$ of data collected by the LHCb experiment. These branching fractions are normalized to those of $\bar{B}^0\to D^+D^-$, $B^0\to D_s^+D^-$ and $B^-\to D^0D_s^-$, respectively. [...]
arXiv:1302.5854; LHCB-PAPER-2012-050; CERN-PH-EP-2013-018; LHCB-PAPER-2012-050; CERN-PH-EP-2013-018.- Geneva : CERN, 2013-05-21 - 12 p. - Published in : Phys. Rev. D 87 (2013) 092007 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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Search for the decay $B_s^0 \to D^{*\mp} \pi^\pm$ / LHCb Collaboration
A search for the decay $B_s^0 \to D^{*\mp} \pi^\pm$ is presented using a data sample corresponding to an integrated luminosity of $1.0 \ {\rm fb}^{-1}$ of $pp$ collisions collected by LHCb. This decay is expected to be mediated by a $W$-exchange diagram, with little contribution from rescattering processes, and therefore a measurement of the branching fraction will help to understand the mechanism behind related decays such as $B_s^0 \to \pi^+\pi^-$ and $B_s^0 \to D \overline{D}$. [...]
arXiv:1302.6446; CERN-PH-EP-2013-025; LHCB-PAPER-2012-056; LHCB-PAPER-2012-056; CERN-PH-EP-2013-025.- Geneva : CERN, 2013-04-23 - 14 p. - Published in : Phys. Rev. D 87 (2013) 071101 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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10.

Observation of the decay $B_c^+ \to \psi(2S)\pi^+$ / LHCb Collaboration
The decay $B_c^+ \to \psi(2S)\pi^+$ with $\psi(2S) \to \mu^+\mu^-$ is observed with a significance of $5.2\,\sigma$ using $pp$ collision data corresponding to an integrated luminosity of 1.0 $fb^{-1}$ collected by the LHCb experiment. The branching fraction of $B_c^+ \to \psi(2S)\pi^+$ decays relative to that of the $B_c^+ \to J/\psi\pi^+$ mode is measured to be \begin{equation*} \frac{\mathcal{B}(B_c^+ \to \psi(2S)\pi^+)}{\mathcal{B}(B_c^+ \to J/\psi\pi^+)} = 0.250 \pm 0.068 \,\text{stat} \pm 0.014 \,\text{\syst} \pm 0.006 \,(\mathcal{B}). [...]
arXiv:1303.1737; CERN-PH-EP-2013-028; LHCB-PAPER-2012-054; LHCB-PAPER-2012-054; CERN-PH-EP-2013-028.- Geneva : CERN, 2013-04-26 - 12 p. - Published in : Phys. Rev. D 87 (2013) 071103 APS Open Access article: PDF; Fulltext: PDF; Related data file(s): ZIP; External link: Preprint

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