J. Caravaca Rodríguez
A5070468840- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Muon and positron interactions and applications
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Advanced X-ray and CT Imaging
- Particle accelerators and beam dynamics
- Advanced MRI Techniques and Applications
- Radiopharmaceutical Chemistry and Applications
- Radiation Therapy and Dosimetry
- Particle Detector Development and Performance
- Radioactive Decay and Measurement Techniques
- Nuclear Materials and Properties
- Nuclear physics research studies
- Noncommutative and Quantum Gravity Theories
- Chemical Reactions and Isotopes
- Advanced Radiotherapy Techniques
- Nuclear Physics and Applications
- Digital Radiography and Breast Imaging
- Effects of Radiation Exposure
- Optical Imaging and Spectroscopy Techniques
- Medical Imaging and Pathology Studies
Lawrence Berkeley National Laboratory
2016-2025
University of California, San Francisco
2021-2024
University of California, Berkeley
2016-2023
University of California System
2020-2023
Berkeley College
2020
Institute for High Energy Physics
2012-2017
Universitat de Barcelona
2015
University of Warwick
2014
Laboratoire Leprince-Ringuet
2011
École Polytechnique
2011
The T2K experiment is a long baseline neutrino oscillation experiment. Its main goal to measure the last unknown lepton sector mixing angle θ13 by observing νe appearance in νμ beam. It also aims make precision measurement of known parameters, Δm232 and sin22θ23, via disappearance studies. Other goals include various cross-section measurements sterile searches. uses an intense proton beam generated J-PARC accelerator Tokai, Japan, composed beamline, near detector complex (ND280), far...
The T2K experiment has observed electron neutrino appearance in a muon beam produced 295 km from the Super-Kamiokande detector with peak energy of 0.6 GeV. A total 28 events were detected an distribution consistent signal, corresponding to significance 7.3σ when compared 4.92±0.55 expected background events. In Pontecorvo-Maki-Nakagawa-Sakata mixing model, signal depends on several parameters including three angles θ12, θ23, θ13, mass difference Δm232 and CP violating phase δCP. this...
We report on measurements of neutrino oscillation using data from the T2K long-baseline experiment collected between 2010 and 2013. In an analysis muon disappearance alone, we find following estimates 68% confidence intervals for two possible mass hierarchies: Normal Hierarchy: $\sin^2\theta_{23}=0.514^{+0.055}_{-0.056}$ $\Delta m^2_{32}=(2.51\pm0.10)\times 10^{-3}$ eV$^2$/c$^4$ Inverted $\sin^2\theta_{23}=0.511\pm0.055$ m^2_{13}=(2.48\pm0.10)\times The accounts multi-nucleon mechanisms in...
SNO+ is a large liquid scintillator-based experiment located 2km underground at SNOLAB, Sudbury, Canada. It reuses the Sudbury Neutrino Observatory detector, consisting of 12m diameter acrylic vessel which will be filled with about 780 tonnes ultra-pure scintillator. Designed as multipurpose neutrino experiment, primary goal search for neutrinoless double-beta decay (0$\nu\beta\beta$) 130Te. In Phase I, detector loaded 0.3% natural tellurium, corresponding to nearly 800 kg 130Te, an expected...
The Tokai-to-Kamioka (T2K) experiment studies neutrino oscillations using an off-axis muon beam with a peak energy of about 0.6 GeV that originates at the J-PARC accelerator facility. Interactions neutrinos are observed near detectors placed 280 m from production target and far detector -- Super-Kamiokande (SK) located 295 km away. flux prediction is essential part successful interaction rates T2K important input to oscillation cross section measurements. A FLUKA GEANT3 based simulation...
New data from the T2K neutrino oscillation experiment produce most precise measurement of mixing parameter ${\ensuremath{\theta}}_{23}$. Using an off-axis beam with a peak energy 0.6 GeV and set corresponding to $6.57\ifmmode\times\else\texttimes\fi{}1{0}^{20}$ protons on target, has fit energy-dependent ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ probability determine parameters. The 68% confidence limit ${\mathrm{sin}}^{2}({\ensuremath{\theta}}_{23})$ is...
The T2K collaboration: reports evidence for electron neutrino appearance at the atmospheric mass splitting, |\Delta m_{32}^2|=2.4x10^{-3} eV^2. An excess of interactions over background is observed from a muon beam with peak energy 0.6 GeV Super-Kamiokande (SK) detector 295 km beam's origin. Signal and predictions are constrained by data near detectors located 280 m production target. We observe 11 candidate events SK when 3.3\pm0.4(syst.) expected. background-only hypothesis rejected...
Abstract New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic sorting have opened up the possibility for building a large-scale detector that can discriminate between Cherenkov scintillation signals. Such could reconstruct particle direction species using light while also having excellent energy resolution low threshold of scintillator detector. Situated deep underground, utilizing new techniques computing reconstruction, this achieve unprecedented...
T2K has performed the first measurement of ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ inclusive charged current interactions on carbon at neutrino energies $\ensuremath{\sim}1\text{ }\text{ }\mathrm{GeV}$ where is reported as a flux-averaged double differential cross section in muon momentum and angle. The flux predicted by beam Monte Carlo external data, including results from NA61/SHINE experiment. data used for this were taken 2010 2011, with total...
We report the measurement of muon neutrino charged-current interactions on carbon without pions in final state at T2K beam energy using $5.734\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons target. For first time is reported as a flux-integrated, double-differential cross section kinematic variables ($\mathrm{cos}{\ensuremath{\theta}}_{\ensuremath{\mu}}$, ${p}_{\ensuremath{\mu}}$), correcting for events where pion produced and then absorbed by interactions. Two analyses are performed...
The SNO+ experiment is located 2 km underground at SNOLAB in Sudbury, Canada. A low background search for neutrinoless double beta (0νββ) decay will be conducted using 780 tonnes of liquid scintillator loaded with 3.9 natural tellurium, corresponding to 1.3 130Te. This paper provides a general overview the experiment, including detector design, construction process plants, commissioning efforts, electronics upgrades, data acquisition systems, and calibration techniques. collaboration reusing...
We report a measurement of muon-neutrino disappearance in the T2K experiment. The 295-km beam from Tokai to Kamioka is first implementation off-axis technique long-baseline neutrino oscillation With data corresponding $1.43\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target, we observe 31 fully-contained single $\ensuremath{\mu}$-like ring events Super-Kamiokande, compared with an expectation $104\ifmmode\pm\else\textpm\fi{}14\text{ }(\mathrm{syst})$ without oscillations. best-fit...
The T2K Collaboration reports a precision measurement of muon neutrino disappearance with an off-axis beam peak energy 0.6 GeV. Near detector measurements are used to constrain the flux and cross section parameters. Super-Kamiokande far detector, which is 295 km downstream production target, collected data corresponding $3.01\ifmmode\times\else\texttimes\fi{}{10}^{20}$ protons on target. In absence oscillations, $205\ifmmode\pm\else\textpm\fi{}17$ (syst) events expected be detected while...
The observation of the recent electron neutrino appearance in a muon beam and high-precision measurement mixing angle |$\theta _{13}$| have led to re-evaluation physics potential T2K long-baseline oscillation experiment. Sensitivities are explored for CP violation neutrinos, non-maximal |$\sin ^22\theta _{23}$|, octant mass hierarchy, addition measurements |$\delta _{{\rm CP}}$|, ^2\theta |$\Delta m^2_{32}$|, various combinations |$\nu$|-mode |$\bar {\nu }$|-mode data-taking. With an...
The T2K off-axis near detector, ND280, is used to make the first differential cross-section measurements of electron neutrino charged current interactions at energies ~1 GeV as a function momentum, scattering angle and four-momentum transfer interaction. total flux-averaged $\nu_e$ on carbon measured be $1.11\pm0.09~(stat)\pm0.18~(syst)\times10^{-38} cm^2/nucleon$. agree with predictions two leading interaction generators, NEUT GENIE. prediction $1.23\times10^{-38} cm^2/nucleon$ GENIE...
Radiopharmaceutical therapy has demonstrated a high efficacy in the treatment of various tumor types. One radionuclides already used clinic is, beta emitter that also emits several photons imageable with SPECT. Quantitative imaging is critical for developing new radiopharmaceuticals. Energy resolution an important factor when multiple photon emissions. Solid-state detectors offer superior performance over scintillators, are commonly commercially-available preclinical SPECT scanners. This...
This paper reports a measurement by the T2K experiment of ${\ensuremath{\nu}}_{\ensuremath{\mu}}$ charged current quasielastic (CCQE) cross section on carbon target with off-axis detector based observed distribution muon momentum (${p}_{\ensuremath{\mu}}$) and angle respect to incident neutrino beam (${\ensuremath{\theta}}_{\ensuremath{\mu}}$). The flux-integrated CCQE was measured be...
Received 22 January 2013DOI:https://doi.org/10.1103/PhysRevD.87.019902© 2013 American Physical Society
We report a measurement of the $\nu_\mu$ inclusive charged current cross sections on iron and hydrocarbon in T2K on-axis neutrino beam. The measured averaged over flux with mean energy 1.51 GeV are $(1.444\pm0.002(stat.)_{-0.157}^{+0.189}(syst.))\times 10^{-38}\mathrm{cm}^2/\mathrm{nucleon}$, $(1.379\pm0.009(stat.)_{-0.147}^{+0.178}(syst.))\times respectively, their section ratio is $1.047\pm0.007(stat.)\pm0.035(syst.)$. These results agree well predictions interaction model, thus we checked...
The T2K off-axis near detector, ND280, is used to make the first differential cross section measurements of muon neutrino charged current single positive pion production on a water target at energies ${\sim}0.8$ GeV. are presented as function and kinematics, in restricted phase-space defined by $p_{\pi^+}>200$MeV/c, $p_{\mu^-}>200$MeV/c, $\cos \theta_{\pi^+}>0.3$ \theta_{\mu^-}>0.3$. total flux integrated $\nu_\mu$ measured be $\langle\sigma\rangle_\phi=4.25\pm0.48 (\mathrm{stat})\pm1.56...
The long baseline between Earth and the Sun makes solar neutrinos an excellent test beam for exploring possible neutrino decay. signature of such decay would be energy-dependent distortion traditional survival probability which can fit using well-developed high-precision analysis methods. Here a model including is to all three phases 8B data taken by Sudbury Neutrino Observatory (SNO). This constrains lifetime mass state ν2 >8.08×10−5 s/eV at 90% confidence. An combining this SNO result with...
Abstract This paper presents measurements of the scintillation light yield and time profile for a number concentrations water-based liquid scintillator, formulated from linear alkylbenzene (LAB) 2,5-diphenyloxazole (PPO). We find that is with concentration scintillator in water between 1 10% slope $$127.9\pm 17.0$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mn>127.9</mml:mn> <mml:mo>±</mml:mo> <mml:mn>17.0</mml:mn> </mml:mrow> </mml:math> ph/MeV/concentration...
A measurement of the $^{8}\mathrm{B}$ solar neutrino flux has been made using a 69.2 kt-day dataset acquired with $\mathrm{SNO}+$ detector during its water commissioning phase. At energies above 6 MeV is an extremely pure sample elastic scattering events, owing primarily to detector's deep location, allowing accurate relatively little exposure. In that energy region best fit background rate $0.2{5}_{\ensuremath{-}0.07}^{+0.09}\text{ }\text{...
This paper reports results from a search for nucleon decay through invisible modes, where no visible energy is directly deposited during the itself, initial water phase of $\mathrm{SNO}+$. However, such decays within oxygen nucleus would produce an excited daughter that subsequently deexcite, often emitting detectable gamma rays. A rays yields limits $2.5\ifmmode\times\else\texttimes\fi{}{10}^{29}\text{ }\text{ }\mathrm{y}$ at 90% Bayesian credibility level (with prior uniform in rate)...
This paper presents studies of the performance water-based liquid scintillators (WbLS) in both 1-kt and 50-kt detectors. Performance is evaluated comparison to pure water Cherenkov detectors a nominal model for scintillator metrics include energy, vertex, angular resolution, along with metric ability separate from scintillation signal as being representative various particle identification capabilities that depend on Cherenkov/scintillation ratio. We also modify time profile light study same...