J. Arnau Romeu
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View article: Measurement of the electron reconstruction efficiency at LHCb
Measurement of the electron reconstruction efficiency at LHCb Open
© 2019 CERN for the benefit of the LHCb collaboration.. The single electron track-reconstruction efficiency is calibrated using a sample corresponding to 1.3 fb-1 of pp collision data recorded with the LHCb detector in 2017. This measureme…
View article: First Observation of Excited Ω_{b}^{-} States.
First Observation of Excited Ω_{b}^{-} States. Open
We report four narrow peaks in the Ξ_{b}^{0}K^{-} mass spectrum obtained using pp collisions at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of 9 fb^{-1} recorded by the LHCb experiment. Refer…
View article: Measurement of $|V_{cb}|$ with $B_s^0 \to D_s^{(*)-} μ^+ ν_μ$ decays
Measurement of $|V_{cb}|$ with $B_s^0 \to D_s^{(*)-} μ^+ ν_μ$ decays Open
The element |Vcb| of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic Bs0 decays produced in proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an in…
View article: Measurement of $|V_{cb}|$ with $B_s^0 \to D_s^{(*)-} \mu^+ \nu_{\mu} $ decays
Measurement of $|V_{cb}|$ with $B_s^0 \to D_s^{(*)-} \mu^+ \nu_{\mu} $ decays Open
The element |Vcb| of the Cabibbo-Kobayashi-Maskawa matrix is measured using semileptonic B0s decays produced in proton-proton collision data collected with the LHCb detector at center-of-mass energies of 7 and 8 TeV, corresponding to an in…
View article: Determination of quantum numbers for several excited charmed mesons observed in B − → D * + π − π − decays
Determination of quantum numbers for several excited charmed mesons observed in B − → D * + π − π − decays Open
A four-body amplitude analysis of the B-→D∗+π-π- decay is performed, where fractions and relative phases of the various resonances contributing to the decay are measured. Several quasi-model-independent analyses are performed aimed at sear…
View article: Search for the Lepton-Flavor-Violating Decays B-s(0) -> pi(+/-mu -/+) and B-0 -> tau(+/-mu -/+)
Search for the Lepton-Flavor-Violating Decays B-s(0) -> pi(+/-mu -/+) and B-0 -> tau(+/-mu -/+) Open
Results are reported from a search for the rare decays B-s(0) -> tau(+/-)mu(+/-) 1T and B -> tau(+/-)mu(+/-), where the r lepton is reconstructed in the channel r- irrg vr. These processes are effectively forbidden in the standard model, h…
View article: Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates
Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates Open
We report a measurement of the mass difference between neutral charm-meson eigenstates using a novel approach that enhances sensitivity to this parameter. We use 2.3×10^{6} D^{0}→K_{S}^{0}π^{+}π^{-} decays reconstructed in proton-proton co…
View article: Amplitude analysis of B^{+-}->pi^{+-}K^{+}K^{-} decays
Amplitude analysis of B^{+-}->pi^{+-}K^{+}K^{-} decays Open
The first amplitude analysis of the $B^\pm \to \pi^\pm K^+ K^-$ decay is reported based on a data sample corresponding to an integrated luminosity of 3.0 fb$^{-1}$ of $pp$ collisions recorded in 2011 and 2012 with the LHCb detector. The da…
View article: Measurements of $CP$ asymmetries in charmless four-body $\Lambda_b$ and $\Xi_b^0$ decays
Measurements of $CP$ asymmetries in charmless four-body $\Lambda_b$ and $\Xi_b^0$ decays Open
A search for $CP$ violation in charmless four-body decays of $\Lambda_b$ and $\Xi_b^0$ baryons with a proton and three charged mesons in the final state is performed. To cancel out production and detection charge-asymmetry effects, the sea…
View article: Evidence for an $η_c(1S) π^-$ resonance in $B^0 \to η_c(1S) K^+π^-$ decays
Evidence for an $η_c(1S) π^-$ resonance in $B^0 \to η_c(1S) K^+π^-$ decays Open
A Dalitz plot analysis of $B^0 \to η_c(1S) K^+π^-$ decays is performed using data samples of $pp$ collisions collected with the LHCb detector at centre-of-mass energies of $\sqrt{s}=7,~8$ and $13$ TeV, corresponding to a total integrated l…
View article: Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era
Physics case for an LHCb Upgrade II - Opportunities in flavour physics, and beyond, in the HL-LHC era Open
The LHCb Upgrade II will fully exploit the flavour-physics opportunities of the HL-LHC, and study additional physics topics that take advantage of the forward acceptance of the LHCb spectrometer. The LHCb Upgrade I will begin operation in …