J. J. Lozano Bahilo
A5101576830- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Quantum Chromodynamics and Particle Interactions
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Computational Physics and Python Applications
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Radiation Detection and Scintillator Technologies
- Distributed and Parallel Computing Systems
- Allergic Rhinitis and Sensitization
- Bladder and Urothelial Cancer Treatments
- Food Allergy and Anaphylaxis Research
- Atmospheric Ozone and Climate
- Atomic and Subatomic Physics Research
- Atomic and Molecular Physics
- Particle Accelerators and Free-Electron Lasers
- Asthma and respiratory diseases
- Resilience and Mental Health
- Advanced Data Storage Technologies
- Nuclear physics research studies
- Disaster Response and Management
Instituto de Física Corpuscular
1995-2024
Universitat de València
1996-2024
Institut d'Estudis Espacials de Catalunya
2024
Universitat de Barcelona
2012-2024
Universidad de Alcalá
2024
Centre National de la Recherche Scientifique
1993-2023
The University of Adelaide
2018-2023
AGH University of Krakow
2023
Durham University
2023
University of Turku
2023
We report on a precision measurement of low-mass muon pairs in 158 AGeV indium-indium collisions at the CERN SPS. A significant excess is observed above yield expected from neutral meson decays. The unprecedented sample size 360 000 dimuons and good mass resolution about 2% allow us to isolate by subtraction decay sources. shape resulting spectrum consistent with dominant contribution...
The NA60 experiment at the CERN SPS has studied low-mass muon pairs in 158A GeV In-In collisions. mass and pT spectra associated with peripheral collisions can quantitatively be described by known neutral meson decays. high data quality allowed to remeasure electromagnetic transition form factors of Dalitz decays η-> μ^+μ^-γand ω-> μ^+μ^-π^0. Using usual pole approximation F = (1-M_{μμ}^{2}/Λ^{2})^{-1} for factors, we find Λ^{-2} (in GeV^{-2}) 1.95+-0.17(stat.)+-0.05(syst.) ηand...
Summary Background Strict avoidance is the only accepted management for cow's milk ( CM ) allergy. oral immunotherapy ‐ OIT under investigation. Objectives To evaluate long‐term safety of . identify clinical/immunological predictors adverse events. Methods Prospective longitudinal epidemiological intervention study. ‐allergic children aged 5–18 underwent a Spanish‐approved protocol without premedication. Clinical data, skin prick test SPT and specific IgE sIgE at baseline 1 year after were...
A sample of 4 x 10(5) events from the decay K(+)-->pi(+)pi(-)e(+)nu(e) (K(e4)) has been collected in experiment E865 at Brookhaven Alternating Gradient Synchrotron. The analysis these data yields new measurements K(e4) branching ratio [(4.11+/-0.01+/-0.11) 10(-5)], s-wave pi scattering length [a(0)(0) = 0.216+/-0.013(stat)+/-0.004(syst)+/-0.005(theor)], and form factors F, G, H hadronic current their dependence on invariant mass.
The NA60 experiment studies muon pair production at the CERN Super Proton Synchrotron. In this Letter we report on a precision measurement of J/ψ in In-In collisions. We have studied centrality distribution, and compared it with one expected if absorption cold nuclear matter were only active suppression mechanism. For collisions involving more than ∼80 participant nucleons, find that an extra is present. This result qualitative agreement previous Pb-Pb measurements by NA50 experiment, but no...
The yield of muon pairs in the invariant mass region 1
We report experimental details and results of a new measurement the decay K+→π+π−e+νe(Ke4). A sample more than 400,000Ke4 events with low background has been collected by Experiment 865 at Brookhaven Alternate Gradient Synchrotron. From these data, branching ratio (4.11±0.01±0.11)×10−5 ππ invariant mass dependence form factors F,G, H weak hadronic current as well phase shift difference δ00−δ11 for scattering were extracted. Using constraints based on analyticity chiral symmetry, value...
A search for lepton flavor violating decays, K+ --> mu+ pi-, e+ pi+ mu-, and pi0 was performed using the data collected in Experiment E865 at Brookhaven Alternating Gradient Synchrotron. No signal found any of decay modes. At 90% confidence level, branching ratios are less than 3.0x10(-9), 6.4x10(-10), 5. 2x10(-10), 5.0x10(-10), 3.4x10(-9), respectively.
The NA60 experiment at the CERN SPS has studied low-mass dimuon production in 158A GeV In-In collisions. An excess of pairs above known meson decays been reported before. We now present precision results on associated transverse momentum spectra. slope parameter Teff extracted from spectra rises with mass up to ρ, followed by a sudden decline above. While initial rise is consistent expectations for radial flow hadronic decay source, signals transition an emission source much smaller flow....
The NA60 experiment at the CERN SPS has measured muon pairs with unprecedented precision in 158A GeV In-In collisions. A strong excess of above known sources is observed whole mass region 0.2 rho -> mu+mu- annihilation. associated spectral function shows a broadening, but essentially no shift mass. For M>1 GeV, found to be prompt, not due enhanced charm production, pronounced differences Drell-Yan pairs. slope parameter Teff transverse momentum spectra rises up rho, followed by sudden...
The NA60 experiment studied low-mass muon pair production in proton–nucleus (p–A) collisions using a 400 GeV proton beam at the CERN SPS. dimuon spectrum is well described by superposition of two-body and Dalitz decays light neutral mesons η, ρ, ω, η′ ϕ, no evidence in-medium effects found. A new high-precision measurement electromagnetic transition form factors η ω was performed, profiting from 10 times larger data sample than peripheral In–In previously collected NA60. Using...
Background: Patterns of sensitization to house dust mites depend on geographic area and are important in clinical practice.However, the role molecular diagnosis is not currently defined.We sought characterize a pediatric population by focusing different mite species major components order assess relevance allergenic our practice.Methods: Consecutive children with respiratory allergy sensitized (determined skin prick test [SPT]) were recruited.We determined specific IgE nDer p 1, rDer 2, 23...
E865 at the Brookhaven National Laboratory AGS collected about 70 000 K(+)(e3) events to measure branching ratio relative observed K+-->pi(+)pi(0), K+-->pi(0)micro(+)nu, and K+-->pi(+)pi(0)pi(0) decays. The pi(0) in all decays was detected using e(+)e(-) pair from pi(0)-->e(+)e(-)gamma decay no photons were required. Using 2002 Particle Data Group ratios for normalization decays, we obtain BR(K(+)(e3(gamma)))=(5.13+/-0.02(stat)+/-0.09(syst)+/-0.04(norm))%, where K(+)(e3(gamma)) includes...
Summary Background Accurate predictors of natural tolerance development to cooked and uncooked egg are needed in egg‐allergic patients. Objective To compare the diagnostic performance different immunological tests relation allergy versus tolerance. Methods Children aged 5–18 years diagnosed with IgE‐mediated were prospectively recruited. All followed an egg‐free diet. Prick test specific IgE ( sIgE ) ovalbumin, ovomucoid white, ovalbumin‐ sIgG 4 ovomucoid‐ determined. By boiled raw...
A low-background sample of 10 300 events has been collected for the decay mode ${K}^{+}\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}{e}^{+}{e}^{\ensuremath{-}}$ by experiment E865 at Brookhaven Alternating Gradient Synchrotron. The branching ratio is measured to be $[2.94\ifmmode\pm\else\textpm\fi{}0.05(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.13(\mathrm{syst})\ifmmode\pm\else\textpm\fi{}0.05(\mathrm{model})]\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}7}$, vector nature this...
To optimise the design of light readout in ArDM 1-ton liquid argon dark matter detector, a range reflector and WLS coating combinations were investigated several small setups, where scintillation was generated by radioactive sources gas at normal temperature pressure shifted into blue region tetraphenyl butadiene (TPB). Various thicknesses TPB deposited spraying vacuum evaporation onto specular 3M{\small\texttrademark}-foil diffuse Tetratex{\small\textregistered} (TTX) substrates. Light...
The Argon Dark Matter (ArDM-1t) experiment is a ton-scale liquid argon (LAr) double-phase time projection chamber designed for direct searches. Such device allows to explore the low energy frontier in LAr with charge imaging detector. ionization extracted from into gas phase and there amplified by use of Large Electron Multiplier order reduce detection threshold. Direct fine spatial granularity, combined measurement amplitude evolution associated primary scintillation light, provide powerful...
We evaluated 102 adult victims of low socioeconomic status living in tent camps 8 months following the Armero disaster Colombia to ascertain level psychiatric morbidity. Ninety-one percent subjects identified by screening instrument as being emotionally distressed met DSM-III criteria for a disorder. The most frequent diagnoses were posttraumatic stress disorder and major depression. These findings indicate that simple can be reliably used detection significant emotional problems among...