Tamara Pardo
A5078163348- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Atomic and Subatomic Physics Research
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Computational Physics and Python Applications
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Neutrino Physics Research
- CCD and CMOS Imaging Sensors
- Image and Signal Denoising Methods
- Cosmology and Gravitation Theories
- Sensor Technology and Measurement Systems
Canfranc Underground Laboratory
2022-2024
CIRCE - Centro Tecnológico
2024
Universidad de Zaragoza
2022-2023
Universitat Politècnica de Catalunya
2023
Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
2011
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2005
Universidade de Santiago de Compostela
2003-2004
Czech Technical University in Prague
2003
The goal of the DIRAC experiment at CERN (PS212) is to measure $\pi^+\pi^-$ atom lifetime with 10% precision. Such a measurement would yield precision 5% on value $S$-wave $\pi\pi$ scattering lengths combination $|a_0-a_2|$. Based part collected data we present first result lifetime, $\tau=[2.91 ^{+0.49}_{-0.62}]\times 10^{-15}$ s, and discuss major systematic errors. This corresponds $|a_0-a_2|=0.264 ^{+0.033}_{-0.020} m_{\pi}^{-1}$.
The nature of dark matter, which constitutes 27% the Universe's matter-energy content, remains one most challenging open questions in physics. Over past two decades, DAMA/LIBRA experiment has reported an annual modulation detection rate $\approx$250 kg NaI(Tl) detectors operated at Gran Sasso Laboratory, collaboration interprets as evidence galactic matter detection. However, this claim not been independently confirmed and is refuted under certain particle halo model scenarios. Therefore, it...
The DIRAC experiment at CERN has achieved a sizeable production of $\pi^+\pi^-$ atoms and significantly improved the precision on its lifetime determination. From sample 21227 atomic pairs, 4% measurement S-wave $\pi\pi$ scattering length difference $|a_0-a_2| = (.0.2533^{+0.0080}_{-0.0078}|_\mathrm{stat}.{}^{+0.0078}_{-0.0073}|_\mathrm{syst})M_{\pi^+}^{-1}$ been attained, providing an important test Chiral Perturbation Theory.
The ANAIS experiment is intended to search for dark matter annual modulation with ultrapure NaI(Tl) scintillators in order provide a model independent confirmation or refutation of the long-standing DAMA/LIBRA positive signal low energy detection rate, using same target and technique. Other experiments exclude region parameters singled out by DAMA/LIBRA. However, these use different materials, so comparison their results depends on models assumed particle its distribution galactic halo....
Weakly interacting massive particles (WIMPs) are well-motivated candidates for dark matter. One signature of galactic WIMPs is the annual modulation expected in a detector's interaction rate, which arises from Earth's revolution around Sun. Over two decades, DAMA/LIBRA experiment has observed such with 250 kg NaI(Tl) scintillators, accordance WIMP expectations but inconsistent negative results other experiments. The signal depends on target material, so to validate or refute DAMA result,...
Abstract The DAMA/LIBRA observation of an annual modulation in the detection rate compatible with that expected for dark matter particles from galactic halo has accumulated evidence more than twenty years. It is only hint a direct elusive matter, but it strong tension negative results other very sensitive experiments, requiring ad-hoc scenarios to reconcile all present experimental results. Testing result using same target material, NaI(Tl), removes dependence on particle and models goal...
ANAIS is a direct dark matter detection experiment whose goal to confirm or refute in model independent way the positive annual modulation signal claimed by DAMA/LIBRA. Consisting of 112.5 kg NaI(Tl) scintillators, ANAIS-112 taking data at Canfranc Underground Laboratory Spain since August, 2017. Results corresponding analysis three years are compatible with absence and incompatible However, testing this relies on knowledge scintillation quenching factors (QF), which measure relative...
The goal of the DIRAC experiment at CERN is to measure with high precision lifetime π + -atom (A 2π ), which order 3×10 -15 s, and thus determine s-wave ππ-scattering lengths difference |a 0 -a 2 |.A atoms are detected through characteristic features -pairs from atom break-up (ionization) in target.We report on a first statistics atomic data sample obtained p Ni interactions 24 GeV/c proton momentum present methods separate signal background.
Sodium Iodide Thallium doped (NaI(Tl)) scintillation detectors have been applied to the direct searches for dark matter since 1980s and produced one of most challenging results in field—the observation by DAMA/LIBRA collaboration an annual modulation detection rate more than twenty cycles. This result is very difficult reconcile with negative derived from other experiments using a large variety target materials techniques. However, it has neither confirmed nor refuted model independent way...
The ANAIS experiment is intended to search for dark matter annual modulation with ultrapure NaI(Tl) scintillators in order provide a model independent confirmation or refutation of the long-standing DAMA/LIBRA positive signal low energy detection rate, using same target and technique. Other experiments exclude region parameters singled out by DAMA/LIBRA. However, these use different materials, so comparison their results depends on models assumed particle its distribution galactic halo....
ANAIS is a direct dark matter detection experiment whose goal to confirm or refute in model independent way the positive annual modulation signal claimed by DAMA/LIBRA. Consisting of 112.5 kg NaI(Tl) scintillators, ANAIS-112 taking data at Canfranc Underground Laboratory Spain since August, 2017. Results corresponding analysis three years are compatible with absence and incompatible However, testing this relies on knowledge scintillation quenching factors (QF), which measure relative...
Weakly interacting massive particles (WIMPs) are well-motivated candidates for dark matter. One signature of galactic WIMPs is the annual modulation expected in a detector's interaction rate, which arises from Earth's rotation around Sun. Over two decades, DAMA/LIBRA experiment has observed such with 250 kg NaI(Tl) scintillators, accordance WIMP expectations but inconsistent negative results other experiments. The signal, however, depends on target, so order to either validate or refute DAMA...
Thiswork deals with the characterization of neutron flux in hall B CanfrancUnderground Laboratory (LSC) employing High Efficiency Neutron Spectrometry Array (HENSA). The ultimate goal this measurement is to set a limit on corresponding effects background ANAIS-112 experiment. preliminary counting rates two years are reported. Various data analysis techniques, including pulse shape discrimination, discussed. first results spectral reconstruction also presented.
The low-energy QCD predictions to be tested by the DIRAC experiment are revised. experimental method, setup characteristics and capabilities, along with first results reported. Preliminary analysis shows good detector performance: alignment error via $Λ$ mass measurement $m_Λ= 1115.6 MeV/c^2$ $σ= 0.92 MeV/c^2$, $p π^-$ relative momentum resolution $σ_Q \approx 2.7 MeV/c$, evidence for $π^+ low Coulomb correlation.