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R. Aaij, Ahmed Sameh Wagih Abdelmotteleb, C. Abellan Beteta, F. Abudinén et autres
Abstract The first observation of the $$ {B}_s^0 $$ B s 0 → D∗+D∗− decay and the measurement of its branching ratio relative to the B0→ D∗+D∗− decay are presented. The data sample used corresponds to an integrated luminosity of 9 fb−1 …
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R. Aaij, A. S. W. Abdelmotteleb, C. Abellán Beteta, F. Abudinén et autres
A measurement of the ratios of the effective decay widths of ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ and ${D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{K}^{+}$ decays over that of ${D}^{0}\ensuremath{\rightarrow}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decays is performed with the LHCb experiment using proton--proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of …
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R. Aaij, Ahmed Sameh Wagih Abdelmotteleb, C. Abellán Beteta, F. Abudinén et autres
The first observations of ${B}^{0}\ensuremath{\rightarrow}{\overline{D}}^{*}(2007{)}^{0}{K}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and ${B}_{s}^{0}\ensuremath{\rightarrow}{\overline{D}}^{*}(2007{)}^{0}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decays are presented, and their branching fractions relative to that of the ${B}^{0}\ensuremath{\rightarrow}{\overline{D}}^{*}(2007{)}^{0}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ decay are reported. These modes can potentially be used to investigate the spectroscopy of charm and charm-strange resonances and to determine the …
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R. Aaij, A. S. W. Abdelmotteleb, C. Abellán Beteta, F. Abudinén et autres
A bstract A study of B + → J / ψηK + decays, followed by J / ψ → μ + μ − and η → γγ, is performed using a dataset collected with the LHCb detector in proton-proton collisions at centre-of-mass …
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R. Aaij, A. S. W. Abdelmotteleb, C. Abellán Beteta, F. J. Abudinen Gallego et autres
Abstract A search is performed for massive long-lived particles (LLPs) decaying semileptonically into a muon and two quarks. Two kinds of LLP production processes were considered. In the first, a Higgs-like boson with mass from 30 to 200 $$\text {\,GeV\!/}c^2$$ \,GeV\!/ c …
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R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres
Abstract The standard model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged leptons, the electron, muon and tau, have identical electroweak interaction strengths. Previous measurements have shown that a …
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R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres
Abstract Mesons comprising a beauty quark and strange quark can oscillate between particle ( $${B}_{\mathrm{s}}^{0}$$ B s 0 ) and antiparticle ( $${\overline{B}}_{\mathrm{s}}^{0}$$ B ¯ s 0 ) flavour eigenstates, with a frequency given by the mass difference between heavy and light …
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R. Aaij, Ahmed Sameh Wagih Abdelmotteleb, Carlos Abellán Beteta, T. Ackernley et autres
A bstract The W boson mass is measured using proton-proton collision data at $$ \sqrt{s} $$ s = 13 TeV corresponding to an integrated luminosity of 1.7 fb − 1 recorded during 2016 by the LHCb experiment. With a simultaneous fit of …
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R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres
The first observation of the ${\mathrm{\ensuremath{\Omega}}}_{b}^{\ensuremath{-}}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Xi}}}_{c}^{+}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{\ensuremath{-}}$ decay is reported using $p$ $p$ collision data at center of mass energies of 7, 8, and 13 TeV collected by the LHCb experiment, corresponding to an integrated luminosity of $9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. Four excited ${\mathrm{\ensuremath{\Omega}}}_{c}^{0}$ …
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R. Aaij, A. S. W. Abdelmotteleb, C. Abellán Beteta, T. Ackernley et autres
A bstract An angular analysis of the rare decay $$ {B}_s^0 $$ B s 0 → ϕμ + μ − is presented, using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7, 8 and 13 TeV, corresponding to …
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R. Aaij, A. S. W. Abdelmotteleb, C. Abellán Beteta, T. Ackernley et autres
Abstract The production cross-sections of J/ψ mesons in proton-proton collisions at a centre-of-mass energy of $$ \sqrt{s} $$ s = 5 TeV are measured using a data sample corresponding to an integrated luminosity of 9.13 ± 0.18 pb−1, collected by the LHCb …
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R. Aaij, C. Abellán Beteta, T. Ackernley, B. Adeva et autres
The branching fraction of the rare ${B}_{s}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}{\ensuremath{\mu}}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}$ decay is measured using data collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to integrated luminosities of 1, 2, and $6\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, respectively. The branching fraction is …
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