A5106468531- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Computational Physics and Python Applications
- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Medical Imaging Techniques and Applications
- Particle Accelerators and Free-Electron Lasers
- Atomic and Subatomic Physics Research
- Distributed and Parallel Computing Systems
- Superconducting Materials and Applications
- Radiation Detection and Scintillator Technologies
- Nuclear physics research studies
- Nuclear reactor physics and engineering
- International Science and Diplomacy
- Atomic and Molecular Physics
- Gamma-ray bursts and supernovae
- Radiation Therapy and Dosimetry
- Mass Spectrometry Techniques and Applications
- Scientific Research and Discoveries
- Nuclear Physics and Applications
Universidad de Oviedo
2016-2025
Institute of High Energy Physics
2015-2024
University of Antwerp
2024
A. Alikhanyan National Laboratory
2022-2024
Colegio de Postgraduados
2024
Instituto de Física de Cantabria
2013-2023
Universidad de Cantabria
2013-2023
Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
2020-2023
University of Zurich
2020
National Taiwan University
2017
The mass of the W boson, a mediator weak force between elementary particles, is tightly constrained by symmetries standard model particle physics. Higgs boson was last missing component model. After observation measurement provides stringent test We measure mass, MW, using data corresponding to 8.8 inverse femtobarns integrated luminosity collected in proton-antiproton collisions at 1.96 tera-electron volt center-of-mass energy with CDF II detector Fermilab Tevatron collider. A sample...
We present a new measurement of the inclusive forward-backward $t\overline{t}$ production asymmetry and its rapidity mass dependence. The measurements are performed with data corresponding to an integrated luminosity $5.3\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\mathrm{TeV}$, recorded CDF-II Detector Fermilab Tevatron. Significant asymmetries observed in both laboratory frame rest frame, cases found be consistent $CP$ conservation...
We present new measurements of the inclusive forward-backward ttbar production asymmetry, AFB, and its dependence on several properties system. The are performed with full Tevatron data set recorded CDF II detector during ppbar collisions at sqrt(s) = 1.96 TeV, corresponding to an integrated luminosity 9.4 fb^(-1). measure asymmetry using rapidity difference Delta-y=y_(t)-y_(tbar). Parton-level results derived, yielding 0.164+/-0.047 (stat + syst). observe a linear AFB top-quark pair mass...
We report a study of the invariant mass distribution jet pairs produced in association with W boson using data collected CDF detector which correspond to an integrated luminosity 4.3 fb(-1). The observed has excess 120-160 GeV/c(2) range is not described by current theoretical predictions within statistical and systematic uncertainties. In this Letter, we studies properties excess.
We have measured the $W$-boson mass ${M}_{W}$ using data corresponding to $2.2\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of integrated luminosity collected in $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\mathrm{TeV}$ with CDF II detector Fermilab Tevatron collider. Samples consisting 470 126 $W\ensuremath{\rightarrow}e\ensuremath{\nu}$ candidates and 624 708 $W\ensuremath{\rightarrow}\ensuremath{\mu}\ensuremath{\nu}$ yield measurement ${M}_{W}=80\text{...
The observation of the $Y(4140)$ structure in $B^\pm\rightarrow J/\psi\,\phi K^\pm$ decays produced $\bar{p} p $ collisions at $\sqrt{s}=1.96~\TeV$ is reported with a statistical significance greater than 5 standard deviations. A fit to $J/\psi\,\phi$ mass spectrum performed assuming presence Breit-Wigner resonance. yields signal $19^{+6}_{-5}$ resonance events, and width $4143.4^{+2.9}_{-3.0}(\mathrm{stat})\pm0.6(\mathrm{syst})~\MeVcc$...
We report a measurement of the bottom-strange meson mixing phase β(s) using time evolution B(s)(0)→J/ψ(→μ(+)μ(-))φ(→K(+)K(-)) decays in which quark-flavor content is identified at production. This uses full data set proton-antiproton collisions √s=1.96 TeV collected by Collider Detector experiment Fermilab Tevatron, corresponding to 9.6 fb(-1) integrated luminosity. confidence regions two-dimensional space and B(s)(0) decay-width difference ΔΓ(s) measure...
We report on a measurement of $CP$-violating asymmetries (${A}_{CP}$) in the Cabibbo-suppressed ${D}^{0}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ and ${D}^{0}\ensuremath{\rightarrow}{K}^{+}{K}^{\ensuremath{-}}$ decays reconstructed data sample corresponding to $5.9\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity collected by upgraded Collider Detector at Fermilab. use strong decay...
We report a measurement of the difference (ΔA(CP)) between time-integrated CP-violating asymmetries in D(0)→K(+)K(-) and D(0)→π(+)π(-) decays reconstructed full data set proton-antiproton collisions collected by Collider Detector at Fermilab, corresponding to 9.7 fb(-1) integrated luminosity. The strong decay D(*+)→D(0)π(+) is used identify charm meson production as D(0) or D[over ¯](0). measure ΔA(CP)=[-0.62±0.21(stat)±0.10(syst)]%, which differs from zero 2.7 Gaussian standard deviations....
A search has been performed for B(s)(0) → μ+ μ- and B(0) decays using 7 fb(-1) of integrated luminosity collected by the CDF II detector at Fermilab Tevatron collider. The observed number candidates is consistent with background-only expectations yields an upper limit on branching fraction B(B(0) μ-) < 6.0 × 10(-9) 95% confidence level. We observe excess candidates. probability that background processes alone could produce such or larger 0.27%. combination expected standard model rate 1.9%....
We present the results of a search for dark matter production in monojet signature. analyze sample Tevatron $p\overline{p}$ collisions at $\sqrt{s}=1.96\text{ }\text{ }\mathrm{TeV}$ corresponding to an integrated luminosity $6.7\text{ }\mathrm{f}{\mathrm{b}}^{\ensuremath{-}1}$ recorded by CDF II detector. In events with large missing transverse energy and one energetic jet, we find good agreement between standard model prediction observed data. set 90% confidence level upper limits on rate....
Assessing genetic biodiversity and population structure of minor breeds through the information provided by neutral molecular markers, allows determination their extinction risk to design strategies for management conservation. Analysis microsatellite loci is known be highly informative in reconstruction historical processes underlying evolution differentiation animal populations. Guadarrama goat a threatened Spanish breed which actual census (2008) consists 3057 females 203 males...
Using the full CDF Run II data sample, we report evidence for a new resonance, which refer to as $B(5970)$, found simultaneously in ${B}^{0}{\ensuremath{\pi}}^{+}$ and ${B}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ mass distributions with significance of 4.4 standard deviations. We further first study resonances consistent orbitally excited ${B}^{+}$ mesons an updated measurement properties ${B}^{0}$ ${B}_{s}^{0}$ mesons. measure masses widths all states, well relative production rates...
The nature of b-quark jet hadronisation has been investigated using data taken at the Z peak by DELPHI detector LEP. Two complementary methods are used to reconstruct energy weakly decaying b-hadrons, $E_{\mathrm{B}}^{\mathrm{weak}}$ . average value $x^{\mathrm{weak}}_{\mathrm{B}} = E_{\mathrm{B}}^{\mathrm{weak}}/E_{\mathrm{beam}}$ is measured be 0.699±0.011. resulting $x^{\mathrm{weak}}_{\mathrm{B}}$ distribution then analysed in framework two choices for perturbative contribution (parton...
We report the most sensitive direct search for pair production of fourth-generation bottomlike chiral quarks (b') each decaying promptly to tW. an excess events with electron or muon, at least five jets (one identified as due a b c quark), and imbalance transverse momentum by using data from pp collisions collected CDF II detector Fermilab integrated luminosity 4.8 fb(-1). observe consistent background expectation, calculate upper limits on b' pair-production cross section (σ(bb')) ≲30 fb...
We present a precision measurement of the top-quark mass using full sample Tevatron $\sqrt{s}=1.96$ TeV proton-antiproton collisions collected by CDF II detector, corresponding to an integrated luminosity 8.7 $fb^{-1}$. Using $t\bar{t}$ candidate events decaying into lepton+jets channel, we obtain distributions masses and invariant two jets from $W$ boson decays data. then compare these templates derived signal background samples extract energy scale calorimeter with {\it in situ}...
The transverse momentum cross section of ${e}^{+}{e}^{\ensuremath{-}}$ pairs in the $Z$-boson mass region $66--116\text{ }\text{ }\mathrm{GeV}/{c}^{2}$ is precisely measured using Run II data corresponding to $2.1\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity recorded by Collider Detector at Fermilab. compared with two quantum chromodynamic calculations. One a fixed-order perturbative calculation $\mathcal{O}({\ensuremath{\alpha}}_{s}^{2})$, and other combines predictions...
We report measurements of direct CP-violating asymmetries in charmless decays neutral bottom hadrons to pairs charged with the upgraded Collider Detector at Fermilab Tevatron. Using a data sample corresponding 1 fb-1 integrated luminosity, we obtain first CP violation strange mesons, A_CP(BsKpi) = +0.39 +- 0.15 stat 0.08 syst, and baryons, A_CP(Lb->ppi) +0.03 0.17 0.05 syst A_CP(Lb->pK) +0.37 0.03 syst. In addition, measure Bd-->Kpi 3.5sigma significance, A_CP(B->Kpi) -0.086 0.023 0.009...
We report measurements of the resonance properties Lambda_c(2595)+ and Lambda_c(2625)+ baryons in their decays to Lambda_c+ pi+ pi- as well Sigma_c(2455)++,0 Sigma_c(2520)++,0 pi+/- final states. These are performed using data corresponding 5.2/fb integrated luminosity from ppbar collisions at sqrt(s) = 1.96 TeV, collected with CDF II detector Fermilab Tevatron. Exploiting largest available charmed baryon sample, we measure masses decay widths uncertainties comparable world averages for...
We present a search for neutral Higgs bosons $\ensuremath{\phi}$ decaying into $b\overline{b}$, produced in association with $b$ quarks $p\overline{p}$ collisions. This process could be observable supersymmetric models high values of $\mathrm{tan}\ensuremath{\beta}$. The event sample corresponds to $2.6\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ integrated luminosity collected the CDF II detector at Fermilab Tevatron collider. an enhancement mass two leading jets events three...
We report on the first measurement of angular distributions final state electrons in $p\bar{p}\to \gamma^{*}/Z\to e^{+}e^{-}+X$ events produced $Z$ boson mass region at $\sqrt{s}=1.96$ TeV. The data sample collected by CDF II detector for this result corresponds to 2.1 fb$^{-1}$ integrated luminosity. are studied as a function transverse momentum electron-positron pair and show good agreement with Lam-Tung relation, consistent spin-1 description gluon, demonstrate that high values momentum,...
A study of the substructure jets with transverse momentum greater than $400\text{ }\text{ }\mathrm{GeV}/c$ produced in proton-antiproton collisions at a center-of-mass energy 1.96 TeV Fermilab Tevatron Collider and recorded by CDF II detector is presented. The distributions jet mass, angularity, planar flow are measured for first time sample an integrated luminosity $5.95\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$. observed high mass consistent predictions from perturbative quantum chromodynamics.
The angular distributions of muons from Υ(1S,2S,3S) → μ+ μ- decays are measured using data pp collisions at sqrt[s] = 1.96 TeV corresponding to an integrated luminosity 6.7 fb(-1) and collected with the CDF II detector Fermilab Tevatron. This analysis is first report full as functions transverse momentum p(T) for Υ mesons in both Collins-Soper s-channel helicity frames. also measurement spin alignment Υ(3S) mesons. Within kinematic range rapidity |y|<0.6 up 40 GeV/c, found be nearly isotropic.