O. Boente García
A5024193792- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Neutrino Physics Research
- Computational Physics and Python Applications
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Particle Accelerators and Free-Electron Lasers
- Medical Imaging Techniques and Applications
- Nuclear physics research studies
- Oil Spill Detection and Mitigation
- Marine and coastal ecosystems
- Superconducting Materials and Applications
- Atomic and Subatomic Physics Research
- Ionosphere and magnetosphere dynamics
- Atmospheric and Environmental Gas Dynamics
- Environmental Monitoring and Data Management
- Radiation Detection and Scintillator Technologies
- Stochastic processes and statistical mechanics
- Advanced Data Storage Technologies
- Solar and Space Plasma Dynamics
- Advanced Computational Techniques and Applications
- Mobile Agent-Based Network Management
- Wireless Communication Networks Research
Laboratoire Leprince-Ringuet
2022-2025
Centre National de la Recherche Scientifique
2022-2025
École Polytechnique
2022-2025
Universidade de Santiago de Compostela
2018-2024
Biomedical Research Institute of Lleida
2024
Universitat de Lleida
2024
Universidad Nacional de Asunción
2022
Institut de Ciències del Mar
2022
Consejo Superior de Investigaciones Científicas
2009-2022
Hospital General Dr Aurelio Valdivieso
2022
A narrow pentaquark state, P_{c}(4312)^{+}, decaying to J/ψp, is discovered with a statistical significance of 7.3σ in data sample Λ_{b}^{0}→J/ψpK^{-} decays, which an order magnitude larger than that previously analyzed by the LHCb Collaboration. The P_{c}(4450)^{+} structure formerly reported confirmed and observed consist two overlapping peaks, P_{c}(4440)^{+} P_{c}(4457)^{+}, where this two-peak interpretation 5.4σ. proximity Σ_{c}^{+}D[over ¯]^{0} ¯]^{*0} thresholds peaks suggests they...
A measurement of the ratio branching fractions decays B^{+}→K^{+}μ^{+}μ^{-} and B^{+}→K^{+}e^{+}e^{-} is presented. The proton-proton collision data used correspond to an integrated luminosity 5.0 fb^{-1} recorded with LHCb experiment at center-of-mass energies 7, 8, 13 TeV. For dilepton mass-squared range 1.1<q^{2}<6.0 GeV^{2}/c^{4} measured be R_{K}=0.846_{-0.054}^{+0.060}_{-0.014}^{+0.016}, where first uncertainty statistical second systematic. This most precise R_{K} date compatible...
Abstract The standard model of particle physics currently provides our best description fundamental particles and their interactions. theory predicts that the different charged leptons, electron, muon tau, have identical electroweak interaction strengths. Previous measurements shown a wide range decays are consistent with this principle lepton universality. This article presents evidence for breaking universality in beauty-quark decays, significance 3.1 deviations, based on proton–proton...
Using proton-proton collision data at centre-of-mass energies of $\sqrt{s} = 7$, $8$ and $13\mathrm{\,TeV}$ recorded by the LHCb experiment Large Hadron Collider, corresponding to an integrated luminosity $9\mathrm{\,fb}^{-1}$, invariant mass spectrum $J/ψ$ pairs is studied. A narrow structure around $6.9\mathrm{\,GeV/}c^2$ matching lineshape a resonance broad just above twice are observed. The deviation from nonresonant $J/ψ$-pair production five standard deviations in region between $6.2$...
Abstract Conventional, hadronic matter consists of baryons and mesons made three quarks a quark–antiquark pair, respectively 1,2 . Here, we report the observation state containing four in Large Hadron Collider beauty experiment. This so-called tetraquark contains two charm quarks, $$\overline{{{{{u}}}}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mover> <mml:mrow> <mml:mi>u</mml:mi> </mml:mrow> <mml:mo>¯</mml:mo> </mml:mover> </mml:math> $$\overline{{{{{d}}}}}$$...
The LHCb Upgrade II will fully exploit the flavour-physics opportunities of HL-LHC, and study additional physics topics that take advantage forward acceptance spectrometer. I begin operation in 2020. Consolidation occur, modest enhancements detector be installed, Long Shutdown 3 LHC (2025) these are discussed here. main installed long shutdown 4 (2030) build on strengths current experiment I. It operate at a luminosity up to $ 2 \times 10^{34} \rm cm^{-2}s^{-1}$, ten times detector. New...
An angular analysis of the $B^{0}\rightarrow K^{*0}(\to K^{+}\pi^{-})\mu^{+}\mu^{-}$ decay is presented using a data set corresponding to an integrated luminosity 4.7 fb$^{-1}$ $pp$ collision collected with LHCb experiment. The full $C\!P$-averaged observables are determined in bins invariant mass squared dimuon system. Contamination from decays $K^{+}\pi^{-}$ system S-wave configuration taken into account. tension seen between previous results and Standard Model predictions persists new...
A search for charge-parity (CP) violation in D^{0}→K^{-}K^{+} and D^{0}→π^{-}π^{+} decays is reported, using pp collision data corresponding to an integrated luminosity of 5.9 fb^{-1} collected at a center-of-mass energy 13 TeV with the LHCb detector. The flavor charm meson inferred from charge pion D^{*}(2010)^{+}→D^{0}π^{+} or muon B[over ¯]→D^{0}μ^{-}ν[over ¯]_{μ}X decays. difference between CP asymmetries measured be ΔA_{CP}=[-18.2±3.2(stat)±0.9(syst)]×10^{-4} π-tagged...
Quantum chromodynamics, the theory of strong force, describes interactions coloured quarks and gluons formation hadronic matter. Conventional matter consists baryons mesons made three quark-antiquark pairs, respectively. Particles with an alternative quark content are known as exotic states. Here a study is reported narrow state in D
Searches are performed for both promptlike and long-lived dark photons, A^{'}, produced in proton-proton collisions at a center-of-mass energy of 13 TeV. These searches look A^{'}→μ^{+}μ^{-} decays using data sample corresponding to an integrated luminosity 5.5 fb^{-1} collected with the LHCb detector. Neither search finds evidence signal, 90% confidence-level exclusion limits placed on γ-A^{'} kinetic mixing strength. The A^{'} explores mass region from near dimuon threshold up 70 GeV...
First evidence of a structure in the J/ψΛ invariant mass distribution is obtained from an amplitude analysis Ξb-→J/ψΛK- decays. The observed consistent with being due to charmonium pentaquark strangeness significance 3.1σ including systematic uncertainties and look-elsewhere effect. Its width are determined be 4458.8±2.9-1.1+4.7MeV 17.3±6.5-5.7+8.0MeV, respectively, where quoted statistical systematic. also two resonances. In addition, narrow excited Ξ- states, Ξ1690- Ξ1820-, seen for first...
Results are reported from an amplitude analysis of the $B^+\to D^+D^-K^+$ decay. The is carried out using LHCb proton-proton collision data taken at $\sqrt{s}=7,8,$ and $13$ TeV, corresponding to a total integrated luminosity 9 fb$^{-1}$. In order obtain good description data, it found be necessary include new spin-0 spin-1 resonances in $D^-K^+$ channel with masses around 2.9 GeV$/c^2$, charmonium resonance proximity spin-2 $\chi_{c2}(3930)$ state. widths these determined, as relative...
The first observation of exotic states with a new quark content $c \bar{c} u \bar{s}$ decaying to the $J/\psi K^+$ final state is reported high significance from an amplitude analysis $B^+ \to J/\psi \phi decay. carried out using proton-proton collision data corresponding total integrated luminosity 9 fb$^{-1}$ collected by LHCb experiment at centre-of-mass energies 7, 8 and 13 TeV. most significant state, $Z_{cs}(4000)^+$, has mass $4003\pm6\,^{+\,\phantom{0}4}_{-\,14}$ MeV, width...
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 a total integrated luminosity $9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$, is carried out test this hypothesis. description assuming that resonances...
We present an angular analysis of the $B^{+}\rightarrow K^{\ast+}(\rightarrow K_{S}^{0}\pi^{+})\mu^{+}\mu^{-}$ decay using 9$\,\mbox{fb}^{-1}$ $pp$ collision data collected with LHCb experiment. For first time, full set CP-averaged observables is measured in intervals dimuon invariant mass squared. Local deviations from Standard Model predictions are observed, similar to those previous analyses isospin-partner $B^{0}\rightarrow K^{\ast0}\mu^{+}\mu^{-}$ decay. The global tension dependent on...
The branching fraction of the rare B_{s}^{0}→ϕμ^{+}μ^{-} decay is measured using data collected by LHCb experiment at center-of-mass energies 7, 8, and 13 TeV, corresponding to integrated luminosities 1, 2, 6 fb^{-1}, respectively. reported in intervals q^{2}, square dimuon invariant mass. In q^{2} region between 1.1 6.0 GeV^{2}/c^{4}, measurement found lie 3.6 standard deviations below a model prediction based on combination light cone sum rule lattice QCD calculations. addition, first...
A bstract The W boson mass is measured using proton-proton collision data at $$ \sqrt{s} <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msqrt><mml:mi>s</mml:mi></mml:msqrt></mml:math> = 13 TeV corresponding to an integrated luminosity of 1.7 fb − 1 recorded during 2016 by the LHCb experiment. With a simultaneous fit muon q/p T distribution sample → μν decays and ϕ * Z μμ determined be {m}_w=80354\pm {23}_{\mathrm{stat}}\pm {10}_{\mathrm{exp}}\pm {17}_{\mathrm{theory}}\pm...
An improved measurement of the decay B0s→μ+μ− and searches for decays B0→μ+μ− B0s→μ+μ−γ are performed at LHCb experiment using data collected in proton-proton collisions √s=7, 8 13 TeV, corresponding to integrated luminosities 1, 2 6 fb−1, respectively. The branching fraction effective lifetime measured be B(B0s→μ+μ−)=(3.09+0.46+0.15−0.43−0.11)×10−9 τ(B0s→μ+μ−)=(2.07±0.29±0.03) ps, respectively, where uncertainties include both statistical systematic contributions. No significant signal is...
Branching fraction and effective lifetime measurements of the rare decay $B^0_s\to\mu^+\mu^-$ searches for decays $B^0\to\mu^+\mu^-$ $B^0_s\to\mu^+\mu^-\gamma$ are reported using proton-proton collision data collected with LHCb detector at centre-of-mass energies $7$ TeV, $8$ TeV $13$ corresponding to a luminosity $9$ fb$^{-1}$. The branching ${\mathcal{B}}(B^0_s\to\mu^+\mu^-)=\left(3.09^{+0.46+0.15}_{-0.43-0.11}\right)\times 10^{-9}$ $\tau(B^0_s\to\mu^+\mu^-)=(2.07\pm 0.29\pm 0.03)$...
The first simultaneous test of muon-electron universality using B^{+}→K^{+}ℓ^{+}ℓ^{-} and B^{0}→K^{*0}ℓ^{+}ℓ^{-} decays is performed, in two ranges the dilepton invariant-mass squared, q^{2}. analysis uses beauty mesons produced proton-proton collisions collected with LHCb detector between 2011 2018, corresponding to an integrated luminosity 9 fb^{-1}. Each four lepton measurements reported either given q^{2} interval or supersedes previous measurements. results are compatible predictions...
Tests of lepton universality in B^{0}→K_{S}^{0}ℓ^{+}ℓ^{-} and B^{+}→K^{*+}ℓ^{+}ℓ^{-} decays where ℓ is either an electron or a muon are presented. The differential branching fractions B^{0}→K_{S}^{0}e^{+}e^{-} B^{+}→K^{*+}e^{+}e^{-} measured intervals the dilepton invariant mass squared. measurements performed using proton-proton collision data recorded by LHCb experiment, corresponding to integrated luminosity 9 fb^{-1} . results consistent with standard model previous tests related decay...
An amplitude analysis of B^{-}→J/ψΛp[over ¯] decays is performed using 4400 signal candidates selected on a data sample pp collisions recorded at center-of-mass energies 7, 8, and 13 TeV with the LHCb detector, corresponding to an integrated luminosity 9 fb^{-1}. A narrow resonance in J/ψΛ system, consistent pentaquark candidate strangeness, observed high significance. The mass width this new state are measured be 4338.2±0.7±0.4 MeV 7.0±1.2±1.3 MeV, where first uncertainty statistical second...
A simultaneous analysis of the B+→K+ℓ+ℓ− and B0→K*0ℓ+ℓ− decays is performed to test muon-electron universality in two ranges square dilepton invariant mass, q2. The measurement uses a sample beauty meson produced proton-proton collisions collected with LHCb detector between 2011 2018, corresponding an integrated luminosity 9 fb−1. sequence multivariate selections strict particle identification requirements produce higher signal purity better statistical sensitivity per unit than previous...
The branching fraction $\mathcal{B}({B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\tau}}^{+}{\ensuremath{\nu}}_{\ensuremath{\tau}})$ is measured relative to that of the normalization mode ${B}^{0}\ensuremath{\rightarrow}{D}^{*\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ using hadronic...
The ratios of branching fractions $\mathcal{R}({D}^{*})\ensuremath{\equiv}\mathcal{B}(\overline{B}\ensuremath{\rightarrow}{D}^{*}{\ensuremath{\tau}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\tau}})/\mathcal{B}(\overline{B}\ensuremath{\rightarrow}{D}^{*}{\ensuremath{\mu}}^{\ensuremath{-}}{\overline{\ensuremath{\nu}}}_{\ensuremath{\mu}})$ and...