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BMy. CepHH 3. OH3HKA. ACTPOHOMHfl. 2022. №2
Current Status of Neutrino Oscillations
Christoph Andreas Ternes E-mail: ternes@to.infn.it
INFN, Sezione di Torino, Via P. Giuria 1, I-10125 Torino, Italy Received November 25, 2021
In this talk I will present the current status of neutrino mixing parameters and masses. Since the discovery of oscillations, neutrino oscillation experiments have reached a very good level in precision. Due to correlations among parameters a global fit combining many different datasets can give more precise results than a single experiment on its own. I will present the results of the latest global fit performed by our group.
Keywords: neutrino oscillations.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 411-414.
The NP06/ENUBET Project: Towards a Monitored Neutrino Beam
M. Torti" et al.
(On behalf of ENUBET Collaboration) E-mail: amarta. torti@mib. infn. it
Phys. Dep. Universita di Milano-Bicocca and INFN Sez. Milano-Bicocca, Milano, Italy
Received February 15, 2022
The ENUBET experiment is developing a new narrow-band neutrino beam in which the flux and the flavor composition are known at 1% level, and the energy with 0(10%) precision. Such a goal is accomplished monitoring the associated charged leptons produced in the decay region of the ENUBET facility: e+ and from kaons are measured by a segmented calorimeter instrumenting the walls of the decay tunnel, while muon stations after the hadron dump can monitor muons from pions. We report an update on the status of the project.
Keywords: neutrino beam.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 415-417.
Results and Prospects from the T2K Experiment
Tomislav Vladisavljevic (T2K Collaboration) E-mail: tomislav.vladisavljevic@stfc.ac.uk
Science and Technology Facilities Council Rutherford Appleton Laboratory. Harwell Campus
Didcot, OX11 0QX United Kingdom Received January 21, 2022
We report on the latest measurements of muon neutrino survival and electron neutrino appearance in an accelerator-generated muon neutrino beam of high purity (and the corresponding processes in an antineutrino beam), with the Tokai-to-Kamioka (T2K) experiment. The T2K result sets the most sensitive limits on certain oscillation parameters, in particular the CP violating phase, showing an indication of matter-antimatter asymmetry in the leptonic sector, and excluding large parts of the available parameter space at the 3 sigma confidence limit. The analysis improvements feeding into our latest result, as well as future experiment prospects, will also be addressed.
Keywords: neutrino physics, T2K, CP violating phase.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 418-421.
Simulation of the Neutron Sources in a Granite Tunnel
S.P. Yakimenko", A.V. Gangapshev, V.V. Kazalov, Yu.M. Gavrilyuk, A.M. Gezhaev
E-mail: asergeiy12@yandex.ru
Institute for Nuclear Research, Russian Academy of Sciences, Moscow, 117312 Russia
Received April 4, 2022
It is necessary to take into account the neutron background in almost all low-background research. In this paper an estimated neutron flux in the underground laboratory DULB-4900 of BNO INR RAS is presented. The estimation is based on results of measurements of radionuclide content in surrounding rock (granite).
Keywords: neutron production; underground experiment; neutron background.
English version: Moscow University Physics Bulletin. 2022. 77, No. 2. Pp. 422-424.
