R. Alemany–Fernández

ORCID: 0000-0002-3363-3280
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About
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Research Areas
  • Particle physics theoretical and experimental studies
  • High-Energy Particle Collisions Research
  • Quantum Chromodynamics and Particle Interactions
  • Particle Detector Development and Performance
  • Particle Accelerators and Free-Electron Lasers
  • Superconducting Materials and Applications
  • Particle accelerators and beam dynamics
  • Dark Matter and Cosmic Phenomena
  • Distributed and Parallel Computing Systems
  • Neutrino Physics Research
  • Atomic and Molecular Physics
  • X-ray Spectroscopy and Fluorescence Analysis
  • Cosmology and Gravitation Theories
  • Advancements in Photolithography Techniques
  • Algorithms and Data Compression
  • Electron and X-Ray Spectroscopy Techniques
  • Advanced Data Storage Technologies
  • Laser-Plasma Interactions and Diagnostics
  • Black Holes and Theoretical Physics
  • Photocathodes and Microchannel Plates
  • Muon and positron interactions and applications
  • Radiation Therapy and Dosimetry
  • Computational Physics and Python Applications
  • Gamma-ray bursts and supernovae
  • Advanced NMR Techniques and Applications

European Organization for Nuclear Research
2008-2021

Austrian Academy of Sciences
2012

Institute of High Energy Physics
2012

LIP - Laboratory of Instrumentation and Experimental Particle Physics
2005-2009

University of Oslo
2007

The CMS detector team describes their experiment and observation of decay products from a standard model Higgs boson, allowing its mass to be determined.

10.1126/science.1230816 article EN Science 2012-12-20

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...

10.1140/epjc/s10052-011-1557-x article EN cc-by-nc The European Physical Journal C 2011-02-01

The energy resolution of the barrel part CMS Electromagnetic Calorimeter has been studied using electrons 20 to 250 GeV in a test beam. incident electron's was reconstructed by summing measured arrays 3 × or 5 channels. There no significant amount correlated noise observed within these arrays. For at centre crystals, mean stochastic term be 2.8% and constant 0.3%. electrons' which is contained array depends on its position incidence. variation containment with corrected for distribution...

10.1088/1748-0221/2/04/p04004 article EN Journal of Instrumentation 2007-04-11

A search for pair-produced doubly charged Higgs bosons has been performed using the data collected by DELPHI detector at LEP centre-of-mass energies between 189 and 209 GeV. No excess is observed in with respect to Standard Model background. lower limit mass of 97.3 GeV/c2 95% confidence level set left–right symmetric models any value Yukawa coupling τ leptons.

10.1016/s0370-2693(02)03125-8 article EN cc-by Physics Letters B 2003-01-01

Single photons detected by the DELPHI experiment at LEP2 in years 1997–2000 are reanalysed to investigate existence of a single extra dimension modified ADD scenario with slightly warped large dimensions. The data collected centre-of-mass energies between 180 and 209 GeV for an integrated luminosity ∼650 pb−1 agree predictions Standard Model allow limit be set on graviton emission one dimension. obtained fundamental mass scale M D is 1.69 TeV/c 2 95% CL, expected 1.71 2.

10.1140/epjc/s10052-009-0874-9 article EN cc-by-nc The European Physical Journal C 2009-01-23

Calibration of the relative response individual channels barrel electromagnetic calorimeter CMS detector was accomplished, before installation, with cosmic ray muons and test beams. One fourth exposed to a beam high energy electrons calibration channels, intercalibration, found be reproducible precision about 0.3%. Additionally, data were collected rays for entire ECAL during commissioning phase. By comparing intercalibration constants obtained electron those from data, it is demonstrated...

10.1088/1748-0221/3/10/p10007 article EN Journal of Instrumentation 2008-10-30

The response of the CMS barrel calorimeter (electromagnetic plus hadronic) to hadrons, electrons and muons over a wide momentum range from 2 350 GeV/c has been measured. To our knowledge, this is widest momenta in which any system studied. These tests, carried out at H2 beam-line CERN, provide wealth information, especially low energies. analysis differences charged pions, kaons, protons antiprotons detailed discussion underlying phenomena are presented. We also show techniques that apply...

10.1140/epjc/s10052-009-0959-5 article EN cc-by-nc The European Physical Journal C 2009-03-02

A search for single top production (e+e−→tc̄) via flavour changing neutral currents (FCNC) was performed using the data taken by DELPHI detector at LEP2. The analyzed have been accumulated center-of-mass energies ranging from 189 to 208 GeV. Limits 95% confidence level were obtained on anomalous coupling parameters κγ and κZ.

10.1016/j.physletb.2004.03.051 article EN cc-by Physics Letters B 2004-04-29

A determination of the single W spin density matrix (SDM) elements in reaction e+e-→W+W-→lνqq̄(l=e/μ) is reported at centre-of-mass energies between 189 and 209 GeV. The data sample used corresponds to an integrated luminosity 520 pb-1 taken by DELPHI 1998 2000. SDM elements, ρττ' W± (τ,τ'=± 1 or 0), are determined as a function W- production angle with respect e- beam direction obtained from measurements decay products application suitable projection operators, Λττ', which assume V-A...

10.1140/epjc/s10052-008-0528-3 article EN cc-by-nc The European Physical Journal C 2008-02-01

Inclusive J/psi production in photon-photon collisions has been observed at LEP II beam energies. A clear signal from the reaction gamma -> J/psi+X is seen. The number of N(J/psi mu+mu-) events 36 +/- 7 for an integrated luminosity 617 pb^{-1}, yielding a cross-section sigma(J/psi+X) = 45 9 (stat) 17 (syst) pb. Based on study event shapes different types processes PYTHIA program, we conclude that (74 22)% are due to `resolved' photons, dominant contribution which most probably gluon...

10.1016/s0370-2693(03)00660-9 article EN cc-by Physics Letters B 2003-06-09

The data taken by DELPHI at centre-of-mass energies between 189 and 209 GeV are used to place limits on the CP-conserving trilinear gauge boson couplings Delta_g1z, lambda_gamma Delta_kappag associated W+W- single W production LEP2. Using from jjlv, jjjj, jjX lX final states, where j, l X represent a jet, lepton missing four-momentum, respectively, following set when one parameter is allowed vary others their Standard Model values of zero: Delta_g1z = -0.025^{+0.033}_{-0.030},...

10.1140/epjc/s10052-010-1254-1 article EN cc-by-nc The European Physical Journal C 2010-02-10

Muon bremsstrahlung photons converted in front of the DELPHI main tracker (TPC) dimuon events at LEP1 were studied two photon kinematic ranges: 0.2<E γ ≤1 GeV and transverse momentum with respect to parent muon p T <40 MeV/c, 1<E ≤10 <80 MeV/c. A good agreement observed rate predictions from QED for inner was found, contrary anomalous soft excess that has been recently hadronic Z 0 decays. The obtained ratios signal predicted level are 1.06±0.12±0.07 energy range 1.04±0.09±0.12 GeV. dead...

10.1140/epjc/s10052-008-0779-z article EN cc-by-nc The European Physical Journal C 2008-10-01
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