Accès ouvert
2019
article
OpenAlex
R. Aaij, Carlos Abellán Beteta, B. Adeva, M. Adinolfi et autres
Results are reported from a search for the rare decays ${B}_{s}^{0}\ensuremath{\rightarrow}{\ensuremath{\tau}}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\mu}}^{\ensuremath{\mp}}$ and ${B}^{0}\ensuremath{\rightarrow}{\ensuremath{\tau}}^{\ifmmode\pm\else\textpm\fi{}}{\ensuremath{\mu}}^{\ensuremath{\mp}}$, where the $\ensuremath{\tau}$ lepton is reconstructed in the channel ${\ensuremath{\tau}}^{\ensuremath{-}}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\nu}}_{\ensuremath{\tau}}$. These processes are effectively forbidden in the standard model, but they can potentially occur at detectable rates in models …
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, Carlos Abellán Beteta, B. Adeva, M. Adinolfi et autres
The production fractions of ${\overline{B}}_{s}^{0}$ and ${\mathrm{\ensuremath{\Lambda}}}_{b}^{0}$ hadrons, normalized to the sum of ${B}^{\ensuremath{-}}$ and ${\overline{B}}^{0}$ fractions, are measured in 13 TeV $pp$ collisions using data collected by the LHCb experiment, corresponding to an integrated luminosity of $1.67\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. These ratios, …
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, Carlos Abellán Beteta, B. Adeva, M. Adinolfi et autres
A time-dependent analysis of the ${B}_{s}^{0}\ensuremath{\rightarrow}\ensuremath{\phi}\ensuremath{\gamma}$ decay rate is performed to determine the $CP$ -violating observables ${S}_{\ensuremath{\phi}\ensuremath{\gamma}}$ and ${C}_{\ensuremath{\phi}\ensuremath{\gamma}}$ and the mixing-induced observable ${\mathcal{A}}_{\ensuremath{\phi}\ensuremath{\gamma}}^{\mathrm{\ensuremath{\Delta}}}$. The measurement is based on a sample of $pp$ collision data recorded with the LHCb detector, corresponding to …
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, Carlos Abellán Beteta, B. Adeva, M. Adinolfi et autres
The first measurement of the production rate of ${\mathrm{\ensuremath{\Xi}}}_{b}^{\ensuremath{-}}$ baryons in $pp$ collisions relative to that of ${\mathrm{\ensuremath{\Lambda}}}_{b}^{0}$ baryons is reported, using data samples collected by the LHCb experiment, and corresponding to integrated luminosities of 1, 2 and $1.6\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ at …
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
A search for CP violation in Λ b 0 → p K − and Λ b 0 → p π − decays is presented using a sample of pp collisions collected with the LHCb detector and corresponding to an integrated luminosity of …
nl, es, gb, us, fr, it, de, ch, ru, br, cn
(code pays fourni par la source)
Accès ouvert
2018
article
OpenAlex
R. Aaij, B. Adeva, Z. Ajaltouni, S. Akar et autres
The decay Λ b 0 → Λ c + p p ‾ π − is observed using pp collision data collected with the LHCb detector at centre-of-mass energies of s = 7 and 8 Tev, corresponding to an integrated luminosity of 3 …
nl, es, gb, fr, us, it, de, ch, ru, br, cn
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni et autres
A measurement of the shape of the differential decay rate and the associated Isgur-Wise function for the decay ${\mathrm{\ensuremath{\Lambda}}}_{b}^{0}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Lambda}}}_{c}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}$ is reported, using data corresponding to $3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ collected with the LHCb detector in proton-proton collisions. The ${\mathrm{\ensuremath{\Lambda}}}_{c}^{+}{\ensuremath{\mu}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}}(+\mathrm{anything})$ final states are reconstructed …
ch, es, gb, fr, us, de, nl, ru, br, it, cn, pl, ua
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
R. Aaij, B. Adeva, Z. Ajaltouni, S. Akar et autres
Measurements of CP observables in B ± → D ( * ) K ± and B ± → D ( * ) π ± decays are presented, where D ( * ) indicates a neutral D or D * meson that is …
ch, es, gb, fr, us, de, nl, ru, br, it, cn
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni et autres
A search for baryon-number violating ${\mathrm{\ensuremath{\Xi}}}_{b}^{0}$ oscillations is performed with a sample of $pp$ collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of $3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The baryon number at the moment of production is identified by requiring …
ch, es, gb, fr, us, de, nl, ru, br, it, cn, pl
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni et autres
A highly significant structure is observed in the Λ_{c}^{+}K^{-}π^{+}π^{+} mass spectrum, where the Λ_{c}^{+} baryon is reconstructed in the decay mode pK^{-}π^{+}. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξ_{cc}^{++}. The difference …
ch, es, gb, fr, us, de, nl, ru, br, it, cn, pl, ua
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni et autres
The ${B}^{+}\ensuremath{\rightarrow}{{D}^{*}}^{\ensuremath{-}}{K}^{+}{\ensuremath{\pi}}^{+}$ decay potentially provides an excellent way to investigate charm meson spectroscopy. The decay is searched for in a sample of proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated …
ch, es, gb, fr, us, de, nl, ru, br, it, cn, pl
(code pays fourni par la source)
Accès ouvert
2017
article
OpenAlex
R. Aaij, B. Adeva, M. Adinolfi, Z. Ajaltouni et autres
A search for the decays ${B}_{c}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{D}^{(*)0}{K}^{+}$ and ${B}_{c}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{D}^{(*)+}{K}^{*0}$ is performed with data collected at the LHCb experiment corresponding to an integrated luminosity of $3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. The decays ${B}_{c}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{D}^{0}{K}^{+}$ and ${B}_{c}^{+}\ensuremath{\rightarrow}J/\ensuremath{\psi}{D}^{*0}{K}^{+}$ are observed for the first time, while first evidence is reported …
ch, es, gb, fr, us, de, nl, ru, br, it, cn, pl
(code pays fourni par la source)