Search results for "oscillation"
showing 10 items of 1257 documents
Alpha frequency discrepancy and trait anxiety, activation, and inhibition in states of anxiety and mindfulness
2018
Meditaatiotekniikat tarjovat laajalti mahdollisuuksia hyvinvoinnin ylläpitämiseen ja kehittämiseen sekä stressin lievittämiseen. Useat neurotieteelliset tutkimukset ovat osoittaneet välittömiä tuloksia meditatitiivisten tekniikoiden soveltamisen ja aivojen oskillatoristen mekanismien välisessä suhteessa. Meditaatiolla on osoitettu olevan myös pitkäaikaisia vaikutuksia, joihin sisältyy ahdistuneisuuden ja murheen väheneminen. Keskittymistä tukevan aivokäyttöliittymän alustavan suunnittelun tueksi tutkittiin alpha-aallonpituuden käyttäytymistä ahdistuneisuuden ja mindfulnessin tiloissa ja niiden välisiä eroja lähestyttiin aktivaatio-/inhibitio -persoonallisuuspiirteiden sekä ahdistuneisuuteen…
CNO and pep solar neutrino measurements and perspectives in Borexino
2015
International audience; The detection of neutrinos emitted in the CNO reactions in the Sun is one of the ambitious goals of Borexino Phase-II. A measurement of CNO neutrinos would be a milestone in astrophysics, and would allow to solve serious issues in current solar models. A precise measurement of the rate of neutrinos from the pep reaction would allow to investigate neutrino oscillations in the MSW transition region. The pep and CNO solar neutrino physics, the measurement in Borexino Phase-I and the perspectives for the new phase are reviewed in this proceeding.
Measurement of Solar pp-neutrino flux with Borexino: results and implications
2015
International audience; Measurement of the Solar pp-neutrino flux completed the measurement of Solar neutrino fluxes from the pp-chain of reactions in Borexino experiment. The result is in agreement with the prediction of the Standard Solar Model and the MSW/LMA oscillation scenario. A comparison of the total neutrino flux from the Sun with Solar luminosity in photons provides a test of the stability of the Sun on the 10(5) years time scale, and sets a strong limit on the power production by the unknown energy sources in the Sun.
Search for Electron Antineutrino Appearance in a Long-baseline Muon Antineutrino Beam
2020
Electron antineutrino appearance is measured by the T2K experiment in an accelerator-produced antineutrino beam, using additional neutrino beam operation to constrain parameters of the Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix. T2K observes 15 candidate electron antineutrino events with a background expectation of 9.3 events. Including information from the kinematic distribution of observed events, the hypothesis of no electron antineutrino appearance is disfavored with a significance of 2.40 σ and no discrepancy between data and PMNS predictions is found. A complementary analysis that introduces an additional free parameter which allows non-PMNS values of electron neutrino and a…
Negative emotional state slows down movement speed : behavioral and neural evidence
2019
Background Athletic performance is affected by emotional state. Athletes may underperform in competition due to poor emotion regulation. Movement speed plays an important role in many competition events. Flexible control of movement speed is critical for effective athletic performance. Although behavioral evidence showed that negative emotion can influence movement speed, the nature of the relationship remains controversial. Thus, the present study investigated how negative emotion affects movement speed and the neural mechanism underlying the interaction between emotion processing and movement control. Methods The present study combined electroencephalography (EEG) technology with a cued-…
Long-baseline neutrino oscillation physics potential of the DUNE experiment
2020
The sensitivity of the Deep Underground Neutrino Experiment (DUNE) to neutrino oscillation is determined, based on a full simulation, reconstruction, and event selection of the far detector and a full simulation and parameterized analysis of the near detector. Detailed uncertainties due to the flux prediction, neutrino interaction model, and detector effects are included. DUNE will resolve the neutrino mass ordering to a precision of 5σσ, for all δCPδCP values, after 2 years of running with the nominal detector design and beam configuration. It has the potential to observe charge-parity violation in the neutrino sector to a precision of 3σσ (5σσ) after an exposure of 5 (10) years, for 50% o…
Optimizing the θ23 octant search in long baseline neutrino experiments
2017
Determination of the θ 23 octant will be an important goal for the next generation of neutrino oscillation experiments, as it will show whether the true value of θ 23 lies in the high octant, θ 23 > 45°, or in the low octant, θ 23 < 45°. In this work we investigate the prospects of studying the θ 23 octant in future long baseline neutrino experiments. Using the GLoBES software, we study the sensitivity to θ 23 octant in terms of baseline length and beam sharing and use the LBNO setup as our benchmark. We also show the interference on the octant determination that arises from the unconstrained CP violation angle δ CP. In our results, we show the impact of matter effects on the octant determi…
IceCube Oscillations: 3 years muon neutrino disappearance data
2015
In the 1990s, Super-Kamiokande’s measurements of atmospheric neutrinos led to the acceptance of the mass-induced oscillation model. As of today, the three mixing angles, the solar mass splitting and the absolute value of the atmospheric mass splitting that control the oscillation phenomenon have been measured. We present a measurement of neutrino oscillations via atmospheric muon neutrino disappearance with three years of data of the completed IceCube neutrino detector. DeepCore, a region of denser instrumentation, enables the detection and reconstruction of atmospheric muon neutrinos between 10 GeV and 100 GeV, where a strong disappearance signal is expected.
Neutrino physics from cosmological observables and oscillation experiments
2018
Aquesta tesi se centra en la física dels neutrins. En particular, se centra en l'estudi de les oscil·lacions de sabor, el paper dels neutrins relíquia en alguns escenaris cosmològics i la interacció entre aquests dos temes. Els neutrins es troben entre les partícules elementals més conegudes. Presenten comportaments interessants, com les seves oscil·lacions, i constitueixen un dels vincles entre les diferents àrees de la física. A través d'aquest document explotem la seva relació amb la cosmologia, amb especial èmfasi en l'Univers primerenc, encara que també parlem de projectes relacionats amb les últimes etapes de la història de l'Univers. En la primera part de la tesi presentem un ajustam…
Measurement of atmospheric neutrino oscillations with three years of data from the full sky.
2018
Initial release related to the measurement of atmospheric neutrino oscillations using three years of neutrino data from the full sky. IceCube results published in Physical Review Letters are competitive for the first time with the best measurements to date. Release limited to Δχ² maps in the (Δm², sin²(θ_23)) space for both the normal and inverted mass ordering. Additional information will be provided as follow-up data analyses are completed by the IceCube Collaboration.