C. Betancourt
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View article: Study of charm mixing and CP violation with D0 → K±π∓π±π∓ decays
Study of charm mixing and CP violation with D0 → K±π∓π±π∓ decays Open
A bstract A study of charm mixing and CP violation in D 0 → K ± π ∓ π ± π ∓ decays is performed using data collected by the LHCb experiment in proton-proton collisions from 2015 to 2018, corresponding to an integrated luminosity of 6 fb − …
View article: Measurement of ψ(2S) to J/ψ cross-section ratio as function of multiplicity in pPb collisions at $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ TeV
Measurement of ψ(2S) to J/ψ cross-section ratio as function of multiplicity in pPb collisions at $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ TeV Open
A bstract The production ratio of ψ (2 S ) to J/ψ charmonium states is presented as a function of multiplicity in proton-lead collisions at a centre-of-mass energy of $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ TeV, for both prompt and nonpro…
View article: Search for the lepton-flavour-violating decays B0 → K*0τ±e∓
Search for the lepton-flavour-violating decays B0 → K*0τ±e∓ Open
A bstract A first search at LHCb for the lepton-flavour-violating decays B 0 → K *0 τ ± e ∓ is presented. The analysis is performed using a sample of proton-proton collision data, collected with the LHCb detector at a centre-of-mass energy…
View article: Coherent photoproduction of ρ0, ω and excited vector mesons in ultraperipheral PbPb collisions
Coherent photoproduction of ρ0, ω and excited vector mesons in ultraperipheral PbPb collisions Open
A bstract The invariant-mass distribution for the coherent photoproduction of dipions in ultraperipheral PbPb collisions is measured using data, corresponding to an integrated luminosity of 224.6 ± 9.6μb − 1 , collected by the LHCb experim…
View article: Amplitude analysis of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msubsup> <mml:mi mathvariant="normal">Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mo stretchy="false">→</mml:mo> <mml:mi>p</mml:mi> <mml:msup> <mml:mi>K</mml:mi> <mml:mo>−</mml:mo> </mml:msup> <mml:msup> <mml:mi>π</mml:mi> <mml:mo>+</mml:mo> </mml:msup> </mml:math> decay and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msubsup> <mml:mi mathvariant="normal">Ξ</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math> baryon polarization measurement in semileptonic beauty-hadron decays
Amplitude analysis of the decay and baryon polarization measurement in semileptonic beauty-hadron decays Open
An amplitude analysis of the Ξ c + → p K − π + decay together with a measurement of the Ξ c + polarization vector in semileptonic beauty-hadron decays is presented. The analysis is performed using proton-proton collision data c…
View article: Measurement of branching fractions and CP asymmetries in $$ {\varLambda}_b^0\left({\varXi}_b^0\right)\to p{K}_{\textrm{S}}^0{h}^{-} $$ decays
Measurement of branching fractions and CP asymmetries in $$ {\varLambda}_b^0\left({\varXi}_b^0\right)\to p{K}_{\textrm{S}}^0{h}^{-} $$ decays Open
A bstract A study of $$ {\Lambda}_b^0 $$ and $$ {\Xi}_b^0 $$ baryon decays to the final states $$ p{K}_{\textrm{S}}^0{\pi}^{-} $$ and $$ p{K}_{\textrm{S}}^0{K}^{-} $$ is performed using pp collision data collect…
View article: Measurement of the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Z</mml:mi></mml:math>-Boson Mass
Measurement of the -Boson Mass Open
The first dedicated Z-boson mass measurement at the LHC with Z→μ+μ− decays is reported. The dataset uses proton-proton collisions at a center-of-mass energy of 13 TeV, recorded in 2016 by the LHCb experiment, and corresponds to an integrat…
View article: Observation of the doubly-charmed-baryon decay $$ {\Xi}_{cc}^{++}\to {\Xi}_c^0{\pi}^{+}{\pi}^{+} $$
Observation of the doubly-charmed-baryon decay $$ {\Xi}_{cc}^{++}\to {\Xi}_c^0{\pi}^{+}{\pi}^{+} $$ Open
A bstract A search for the doubly-charmed-baryon decay $$ {\Xi}_{cc}^{++}\to {\Xi}_c^0{\pi}^{+}{\pi}^{+} $$ is performed using proton-proton collision data collected by the LHCb experiment at a centre-of-mass energy of 13…
View article: Rapidity and multiplicity dependence of charged-particle flow in pPb collisions at $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ TeV
Rapidity and multiplicity dependence of charged-particle flow in pPb collisions at $$ \sqrt{s_{\textrm{NN}}}=8.16 $$ TeV Open
A bstract The elliptic and triangular flow of charged particles are measured using two-particle angular correlations in p Pb collisions in the pseudorapidity range 2.0 < | η | < 4.8. The data sample was collected by the LHCb experiment in …
View article: Improved measurement of η/η′ mixing in $$ {B}_{(s)}^0\to J/\psi {\eta}^{\left(\prime \right)} $$ decays
Improved measurement of η/η′ mixing in $$ {B}_{(s)}^0\to J/\psi {\eta}^{\left(\prime \right)} $$ decays Open
A bstract Branching fraction ratios between the decays $$ {B}_{(s)}^0\to J/\psi {\eta}^{\left(\prime \right)} $$ are measured using proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7…
View article: Measurements of charmed meson and antimeson production asymmetries at $$ \sqrt{\textrm{s}}=13.6 $$ TeV
Measurements of charmed meson and antimeson production asymmetries at $$ \sqrt{\textrm{s}}=13.6 $$ TeV Open
A bstract This article presents doubly differential measurements of the asymmetries in production rates between mesons containing a charm quark and those containing an anti-charm quark in proton-proton collisions at a centre-of-mass energy…
View article: Study of charm mixing and CP violation with $D^0\to K^\pmπ^\mpπ^\pmπ^\mp$ decays
Study of charm mixing and CP violation with $D^0\to K^\pmπ^\mpπ^\pmπ^\mp$ decays Open
A study of charm mixing and CP violation in $D^0\to K^\pmπ^\mpπ^\pmπ^\mp$ decays is performed using data collected by the LHCb experiment in proton-proton collisions from 2015 to 2018, corresponding to an integrated luminosity of 6$\text{f…
View article: Observation of Orbitally Excited <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> </mml:math> States
Observation of Orbitally Excited States Open
The observation of a wide peaking structure in the B c + γ mass spectrum is reported using proton-proton collision data collected by the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to a total integrated …
View article: Study of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow> <mml:msub> <mml:mrow> <mml:mi>B</mml:mi> </mml:mrow> <mml:mrow> <mml:mi>c</mml:mi> </mml:mrow> </mml:msub> <mml:mo stretchy="false">(</mml:mo> <mml:mn>1</mml:mn> <mml:mi>P</mml:mi> <mml:msup> <mml:mrow> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> <mml:mrow> <mml:mo>+</mml:mo> </mml:mrow> </mml:msup> </mml:mrow> </mml:math> states in the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msubsup> <mml:mi>B</mml:mi> <mml:mi>c</mml:mi> <mml:mo>+</mml:mo> </mml:msubsup> <mml:mi>γ</mml:mi> </mml:math> mass spectrum
Study of states in the mass spectrum Open
The study of a wide peaking structure in the B c + γ mass spectrum is reported using a data sample of proton-proton collisions collected by the LHCb detector at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrate…
View article: Measurement of the $W \to μν_μ$ cross-sections as a function of the muon transverse momentum in $pp$ collisions at 5.02 TeV
Measurement of the $W \to μν_μ$ cross-sections as a function of the muon transverse momentum in $pp$ collisions at 5.02 TeV Open
The $pp \to W^{\pm} (\to μ^{\pm} ν_μ) X$ cross-sections are measured at a proton-proton centre-of-mass energy $\sqrt{s} = 5.02$ TeV using a dataset corresponding to an integrated luminosity of 100 pb$^{-1}$ recorded by the LHCb experiment.…
View article: First evidence of $CP$ violation in beauty baryon to charmonium decays
First evidence of $CP$ violation in beauty baryon to charmonium decays Open
A study of the difference in the $CP$ asymmetries between $Λ^0_b \rightarrow J / ψp π^-$ and $Λ^0_b \rightarrow J / ψp K^-$ decays, $Δ{\cal A}_{CP}$, is performed using proton-proton collision data collected by the LHCb experiment in the y…
View article: Observation of $B_c^+ \to D h^+ h^-$ decays
Observation of $B_c^+ \to D h^+ h^-$ decays Open
Searches are presented for $B_{c}^{+} \to D h^+ h^-$ decays, where $D$ is a charmed meson and $h^{\pm}$ is a charged pion or kaon, using $pp$ collision data collected by the LHCb experiment corresponding to an integrated luminosity of $9~\…
View article: A model-independent measurement of the CKM angle $γ$ in the decays $B^\pm\to[K^+K^-π^+π^-]_D h^\pm$ and $B^\pm\to[π^+π^-π^+π^-]_D h^\pm$ ($h = K, π$)
A model-independent measurement of the CKM angle $γ$ in the decays $B^\pm\to[K^+K^-π^+π^-]_D h^\pm$ and $B^\pm\to[π^+π^-π^+π^-]_D h^\pm$ ($h = K, π$) Open
A model-independent determination of the CKM angle $γ$ is presented, using the $B^\pm\to[K^+K^-π^+π^-]_D h^\pm$ and $B^\pm\to[π^+π^-π^+π^-]_D h^\pm$ decays, with $h=K,π$. This measurement is the first phase-space-binned study of these deca…
View article: Measurement of the branching fraction of the $Λ_b^0\to J/ψΛ$ decay and isospin asymmetry of $B\to J/ψK$ decays
Measurement of the branching fraction of the $Λ_b^0\to J/ψΛ$ decay and isospin asymmetry of $B\to J/ψK$ decays Open
This paper describes a measurement of the $Λ_b^0\to J/ψΛ$ branching fraction using data collected with the LHCb experiment in proton-proton collisions from 2016 to 2018. The dataset corresponds to an integrated luminosity of 5.4$\,\text{fb…
View article: First measurement of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si10.svg"> <mml:mi>b</mml:mi> </mml:math> -jet mass with and without grooming
First measurement of -jet mass with and without grooming Open
The LHCb collaboration presents a novel suite of heavy-flavour jet substructure measurements at forward rapidity in proton-proton collisions at a centre-of-mass energy of s=13TeV. The jet mass is a perturbatively calculable probe of the vi…
View article: Measurement of the Lund plane for light- and beauty-quark jets
Measurement of the Lund plane for light- and beauty-quark jets Open
The substructure of jets in quantum chromodynamics (QCD) has garnered significant attention with the advent of infrared- and collinear-safe clustering algorithms and observables. A key question emerging from these studies is how in-jet emi…
View article: Measurement of branching fractions and $CP$ asymmetries in $\mathitΛ_b^0(\mathitΞ_b^0)\!\to pK_{\mathrm S}^0h^-$ decays
Measurement of branching fractions and $CP$ asymmetries in $\mathitΛ_b^0(\mathitΞ_b^0)\!\to pK_{\mathrm S}^0h^-$ decays Open
A study of $\mathitΛ_b^0$ and $\mathitΞ_b^0$ baryon decays to the final states $pK_{\mathrm S}^0π^-$ and $pK_{\mathrm S}^0K^-$ is performed using $pp$ collision data collected by the LHCb experiment, corresponding to an integrated luminosi…
View article: Three-pion Bose-Einstein correlations measured in proton-proton collisions
Three-pion Bose-Einstein correlations measured in proton-proton collisions Open
A bstract A study on the Bose-Einstein correlations for triplets of same-sign pions is presented. The analysis is performed using proton-proton collisions at a centre-of-mass energy of $$ \sqrt{s} $$ = 7 TeV, recorded by the LHCb experi…
View article: First observation of $CP$ violation and measurement of polarization in $B^+\toρ(770)^0 K^*(892)^+$ decays
First observation of $CP$ violation and measurement of polarization in $B^+\toρ(770)^0 K^*(892)^+$ decays Open
An amplitude analysis of the $B^+\to(π^+π^-)(K^0_{\mathrm{S}}π^+)$ decay is performed in the mass regions $0.30 < m_{π^+π^-} < 1.10\,\mathrm{GeV}/c^2$ and $0.75 < m_{K^0_{\mathrm{S}}π^+} < 1.20\,\mathrm{GeV}/c^2$, using $pp$ collision data…
View article: Measurement of transverse $Λ$ and $\barΛ$ hyperon polarization in $p$Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV
Measurement of transverse $Λ$ and $\barΛ$ hyperon polarization in $p$Pb collisions at $\sqrt{s_{NN}} = 5.02$ TeV Open
The transverse polarization of $Λ$ and $\barΛ$ hyperons is measured in $p$Pb collisions collected by the LHCb experiment at a nucleon-nucleon center-of-mass energy of $5.02 $ TeV. The polarization is averaged over hyperon transverse moment…
View article: Amplitude analysis of the $Ξ^+_c\to pK^-π^+$ decay and $Ξ^+_c$ baryon polarization measurement in semileptonic beauty-hadron decays
Amplitude analysis of the $Ξ^+_c\to pK^-π^+$ decay and $Ξ^+_c$ baryon polarization measurement in semileptonic beauty-hadron decays Open
An amplitude analysis of the $Ξ^+_c\to pK^-π^+$ decay together with a measurement of the $Ξ^+_c$ polarization vector in semileptonic beauty-hadron decays is presented. The analysis is performed using proton-proton collision data collected …
View article: Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$ = 5.02 TeV
Measurement of the ψ(2S) to J/ψ cross-section ratio as a function of centrality in PbPb collisions at $$ \sqrt{{\textrm{s}}_{\textrm{NN}}} $$ = 5.02 TeV Open
A bstract The ratio of prompt production cross-sections of ψ (2 S ) and J/ψ mesons in their dimuon final state is measured as a function of centrality, using data collected by the LHCb detector in PbPb collisions at $$ \sqrt{s_{\textrm{NN}…