Updated physics performance of the ESSnuSB experiment

In this paper, we present the physics performance of the ESSnuSB experiment in the standard three flavor scenario using the updated neutrino flux calculated specifically for the ESSnuSB configuration and updated migration matrices for the far detector. Taking conservative systematic uncertainties corresponding to a normalization error of for signal and for background, we find that there is CP violation discovery sensitivity for the baseline option of 540 km (360 km) at . The corresponding fraction of for which CP violation can be discovered at more than is . Regarding CP precision measurements, the error associated with is around and with is around for the baseline option of 540 km (360 km). For hierarchy sensitivity, one can have sensitivity for 540 km baseline except and sensitivity for 360 km baseline for all values of . The octant of can be determined at for the values of: ( and ) for baseline of 540 km (360 km). Regarding measurement precision of the atmospheric mixing parameters, the allowed values at are: () and eV eV ( eV eV) for the baseline of 540 km (360 km)

Očekivani broj raspršenja neutrina u udaljenim detektorima projekta ESSnuSB

ESSSB is a project in a design phase with an aim to measure CP violation in lepton sector by observing neutrino oscillations. It consists of near detectors at 250m from the neutrino production target and far detectors at 540km (or 360 km) from neutrino production target. To make all the necessary simulations and analysis of the possible performance of ESSSB experiment, one needs to know the expected number of neutrino interactions in all detectors of the experiment. This thesis provides expected number of neutrino interactions for near and far water Cherenkov detectors and near scintillator based detector. While calculating the neutrino oscillation probabilties, matter eects were taken into the account and compared to the vacuum oscillations. Comparison between expected number of interactions for dierent CP values has been made, clearly demonstrating sensitivity to CP . It is shown that the results do not depend much on the matter effects

Sterile Neutrinos

Još od otkrića neutrinskih oscilacija, masa neutrina kontinuirano predstavlja problem u Standardnom modelu. Obećavajuće rješenje tog problema predstavlja hipotetski četvrti sterilni neutrino. U ovom sam radu ukratko predstavio sterilni neutrino i kako se uklapa u Standardni model. Također, navest ću trenutno najbolje dokaze njegovog postojanja dobivene eksperimentima LSND i MiniBooNE te ću dati mali pregled nadolazećih eksperimenata poput SBN (Short-Baseline Neutrino) programa koji bi trebali razjasniti sliku sterilnog neutrina u nadolazećim godinama

Očekivani broj raspršenja neutrina u udaljenim detektorima projekta ESSnuSB

ESSSB is a project in a design phase with an aim to measure CP violation in lepton sector by observing neutrino oscillations. It consists of near detectors at 250m from the neutrino production target and far detectors at 540km (or 360 km) from neutrino production target. To make all the necessary simulations and analysis of the possible performance of ESSSB experiment, one needs to know the expected number of neutrino interactions in all detectors of the experiment. This thesis provides expected number of neutrino interactions for near and far water Cherenkov detectors and near scintillator based detector. While calculating the neutrino oscillation probabilties, matter eects were taken into the account and compared to the vacuum oscillations. Comparison between expected number of interactions for dierent CP values has been made, clearly demonstrating sensitivity to CP . It is shown that the results do not depend much on the matter effects

Sterile Neutrinos

Još od otkrića neutrinskih oscilacija, masa neutrina kontinuirano predstavlja problem u Standardnom modelu. Obećavajuće rješenje tog problema predstavlja hipotetski četvrti sterilni neutrino. U ovom sam radu ukratko predstavio sterilni neutrino i kako se uklapa u Standardni model. Također, navest ću trenutno najbolje dokaze njegovog postojanja dobivene eksperimentima LSND i MiniBooNE te ću dati mali pregled nadolazećih eksperimenata poput SBN (Short-Baseline Neutrino) programa koji bi trebali razjasniti sliku sterilnog neutrina u nadolazećim godinama

Sterile Neutrinos

Još od otkrića neutrinskih oscilacija, masa neutrina kontinuirano predstavlja problem u Standardnom modelu. Obećavajuće rješenje tog problema predstavlja hipotetski četvrti sterilni neutrino. U ovom sam radu ukratko predstavio sterilni neutrino i kako se uklapa u Standardni model. Također, navest ću trenutno najbolje dokaze njegovog postojanja dobivene eksperimentima LSND i MiniBooNE te ću dati mali pregled nadolazećih eksperimenata poput SBN (Short-Baseline Neutrino) programa koji bi trebali razjasniti sliku sterilnog neutrina u nadolazećim godinama

ENUBET: A monitored neutrino beam for high precision cross section measurements

International audienceThe main source of systematic uncertainty on neutrino cross section measurements at the GeV scale is represented by the poor knowledge of the initial flux. The goal of cutting down this uncertainty to 1% can be achieved through the monitoring of charged leptons produced in association with neutrinos, by properly instrumenting the decay region of a conventional narrow-band neutrino beam. Large angle muons and positrons from kaons are measured by a sampling calorimeter on the decay tunnel walls (tagger), while muon stations after the hadron dump can be used to monitor the neutrino component from pion decays. This instrumentation can provide a full control on both the muon and electron neutrino fluxes at all energies. Furthermore, the narrow momentum width (<10%) of the beam provides a O(10%) measurement of the neutrino energy on an event by event basis, thanks to its correlation with the radial position of the interaction at the neutrino detector. The ENUBET project has been funded by the ERC in 2016 to prove the feasibility of such a monitored neutrino beam and is cast in the framework of the CERN neutrino platform (NP06) and the Physics Beyond Colliders initiative. In our contribution, we summarize the ENUBET design, physics performance and opportunities for its implementation in a timescale comparable with next long baseline neutrino experiments