Accès ouvert
2022
article
OpenAlex
R. Aaij, Carlos Abellán Beteta, T. Ackernley, B. Adeva et autres
The photoproduction of $J/\ensuremath{\psi}\phantom{\rule{1.111pt}{0ex}}$ mesons at low transverse momentum is studied in peripheral lead-lead collisions collected by the LHCb Collaboration at a center-of-mass energy per nucleon pair of $5\phantom{\rule{3.33333pt}{0ex}}\mathrm{TeV}$, corresponding to an integrated luminosity of 210 $\ensuremath{\mu}{\mathrm{b}}^{\ensuremath{-}1}$. The $J/\ensuremath{\psi}\phantom{\rule{1.111pt}{0ex}}$ candidates are reconstructed …
nl, ch, gb, es, fr, us, it, de, ru, br, Zimbabwe, pl, cn
(code pays fourni par la source)
Accès ouvert
2022
article
OpenAlex
R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres
Branching fraction and effective lifetime measurements of the rare decay B0s→μ+μ− and searches for the decays B0→μ+μ− and B0s→μ+μ−γ are reported using proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a …
nl, ch, gb, es, fr, us, it, de, ru, br, pl, cn
(code pays fourni par la source)
Accès ouvert
2022
article
OpenAlex
R. Aaij, A. S. W. Abdelmotteleb, Carlos Abellán Beteta, F. J. Abudinen Gallego et autres
Abstract Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1collected with the LHCb detector, seven decay modes of the $$ {\mathrm{B}}_{\mathrm{c}}^{+} $$ Bc+ meson into a J/ψ or ψ(2S) meson and three charged hadrons, kaons or pions, are studied. …
nl, gb, ch, es, fr, us, it, de, ru, br, cn, pl
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Accès ouvert
2021
article
OpenAlex
R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres
Abstract A flavour-tagged time-dependent angular analysis of $${{B} ^0_{s}} \!\rightarrow {{J /\psi }} \phi $$ B s 0 → J / ψ ϕ decays is presented where the $${J /\psi }$$ J / ψ meson is reconstructed through its decay to an …
nl, ch, gb, es, fr, us, it, de, ru, br, pl, cn
(code pays fourni par la source)
Accès ouvert
2020
article
OpenAlex
R. Aaij, Carlos Abellán Beteta, T. Ackernley, B. Adeva et autres
The only anticipated resonant contributions to ${B}^{+}\ensuremath{\rightarrow}{D}^{+}{D}^{\ensuremath{-}}{K}^{+}$ decays are charmonium states in the ${D}^{+}{D}^{\ensuremath{-}}$ channel. A model-independent analysis, using LHCb proton-proton collision data taken at center-of-mass energies of $\sqrt{s}=7$, 8, and 13 TeV, corresponding to a total integrated luminosity of $9\text{ }\text{ …
nl, ch, gb, es, fr, us, it, de, ru, br, pl, cn
(code pays fourni par la source)
Accès ouvert
2020
article
OpenAlex
R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres
The first observation of the decay ${B}^{0}\ensuremath{\rightarrow}{D}^{0}{\overline{D}}^{0}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ is reported using proton-proton collision data corresponding to an integrated luminosity of $4.7\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected by the LHCb experiment in 2011, 2012 and 2016. The measurement is performed in the full kinematically allowed range …
nl, ch, gb, es, fr, us, it, de, ru, br, pl, cn
(code pays fourni par la source)
Accès ouvert
2019
article
OpenAlex
R. Aaij, C. Abellán Beteta, B. Adeva, M. Adinolfi et autres
Using $pp$ collision data corresponding to an integrated luminosity of $8.5\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ recorded by the LHCb experiment at center-of-mass energies of $\sqrt{s}=7$, 8, and 13 TeV, the observation of an excited ${B}_{c}^{+}$ state in the ${B}_{c}^{+}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ invariant-mass spectrum is reported. The …
nl, ch, es, gb, us, fr, it, de, ru, br, pl, cn
(code pays fourni par la source)
Accès ouvert
2019
article
OpenAlex
R. Aaij, C. Abellán Beteta, B. Adeva, M. Adinolfi et autres
A narrow pentaquark state, P_{c}(4312)^{+}, decaying to J/ψp, is discovered with a statistical significance of 7.3σ in a data sample of Λ_{b}^{0}→J/ψpK^{-} decays, which is an order of magnitude larger than that previously analyzed by the LHCb Collaboration. The P_{c}(4450)^{+} pentaquark structure …
nl, ch, es, gb, us, fr, it, de, ru, br, pl, cn
(code pays fourni par la source)
Accès ouvert
2019
article
OpenAlex
R. Aaij, C. Abellán Beteta, B. Adeva, M. Adinolfi et autres
The branching fraction and direct CP asymmetry of the decay B + → J/ψ ρ + are measured using protonproton collision data collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV, corresponding to a total integrated luminosity of …
nl, ch, es, gb, us, fr, it, de, ru, br, pl, cn
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
R. Aaij, B. Adeva, M. Adinolfi, C. Aidala et autres
The first observation of the ${B}_{s}^{0}\ensuremath{\rightarrow}{\overline{D}}^{*0}\ensuremath{\phi}$ decay is reported, with a significance of more than seven standard deviations, from an analysis of $pp$ collision data corresponding to an integrated luminosity of $3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, collected with the LHCb detector at center-of-mass energies …
nl, es, gb, us, fr, it, de, ch, ru, br, cn, pl
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni et autres
A measurement is reported of the ratio of branching fractions $\mathcal{R}(J/\ensuremath{\psi})=\mathcal{B}({B}_{c}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\tau}}^{+}{\ensuremath{\nu}}_{\ensuremath{\tau}})/\phantom{\rule{0ex}{0ex}}\mathcal{B}({B}_{c}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{\ensuremath{\mu}}^{+}{\ensuremath{\nu}}_{\ensuremath{\mu}})$, where the ${\ensuremath{\tau}}^{+}$ lepton is identified in the decay mode ${\ensuremath{\tau}}^{+}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{+}{\ensuremath{\nu}}_{\ensuremath{\mu}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\tau}}$. This analysis uses a sample of proton-proton collision data corresponding to $3.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of integrated luminosity recorded with the …
ch, es, gb, fr, us, de, nl, ru, br, it, cn, pl
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni et autres
Investigations of the existence of pentaquark states containing a single $b$ (anti)quark decaying weakly into four specific final states $J/\ensuremath{\psi}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}p$, $J/\ensuremath{\psi}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}p$, $J/\ensuremath{\psi}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}p$, and $J/\ensuremath{\psi}\ensuremath{\phi}(1020)p$ are reported. The data sample corresponds to an integrated luminosity of $3.0\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ in 7 and 8 …
ch, es, gb, fr, us, de, nl, ru, br, it, cn, pl
(code pays fourni par la source)