Neutrino mixings as a source of charged lepton flavor violations

Within the left–right symmetric model (LRM) the Z boson decay into the channel Z→τμ are investigated. The branching ratios of this decay is found in the third order of the perturbation theory. The obtained expression does not equal to zero only at the existence of the neutrino mixings. This means that from the point of view of the LRM, the nonconservations of the neutral and the charged lepton flavors have the same nature. As a result, the elucidation of the decays Z→lil̄ k(i≠k) could provide data concerned the neutrino sector structure of the LRM. The neutrino sector parameters which could be measured in that case are as follows: (i) difference of the heavy neutrino masses; (ii) heavy–heavy neutrino mixing; (iii) heavy–light neutrino mixing

Neutrino oscillations in intensive magnetic fields

The evolution of the neutrino flux traveling through condensed matter and intensive magnetic field is considered. As the examples of the intensive magnetic field the magnetic fields of the coupled sunspots and the collapsar jets are considered. It is assumed that the neutrinos possess both the dipole magnetic moment and the anapole moment while the magnetic field may takes the values ≥ 105 Gs and has the twisting nature. The problem is investigated within three neutrino generations. The possible resonance conversions of the neutrino flux are examined

UV and IR Spectroscopy of Metal Ion-Crown Ether Complexes in the Gas Phase

Seventh International Conference on Advanced Vibrational Spectroscopy (ICAVS-7), 2013年8月25日-30日, 神戸国際会議

On-line recognition of supernova neutrino bursts in the LVD detector

In this paper we show the capabilities of the Large Volume Detector (INFN Gran Sasso National Laboratory) to identify a neutrino burst associated to a supernova explosion, in the absence of an "external trigger", e.g., an optical observation. We describe how the detector trigger and event selection have been optimized for this purpose, and we detail the algorithm used for the on-line burst recognition. The on-line sensitivity of the detector is defined and discussed in terms of supernova distance and electron anti-neutrino intensity at the source.Comment: Accepted for pubblication on Astroparticle Physics. 13 pages, 10 figure

First CNGS events detected by LVD

The CERN Neutrino to Gran Sasso (CNGS) project aims to produce a high energy, wide band $\nu_{\mu}$ beam at CERN and send it toward the INFN Gran Sasso National Laboratory (LNGS), 732 km away. Its main goal is the observation of the $\nu_{\tau}$ appearance, through neutrino flavour oscillation. The beam started its operation in August 2006 for about 12 days: a total amount of $7.6~10^{17}$ protons were delivered to the target. The LVD detector, installed in hall A of the LNGS and mainly dedicated to the study of supernova neutrinos, was fully operating during the whole CNGS running time. A total number of 569 events were detected in coincidence with the beam spill time. This is in good agreement with the expected number of events from Montecarlo simulations.Comment: Accepted for publication by the European Physical Journal C ; 7 pages, 11 figure

極低温イオントラップ中の金属イオン－クラウンエーテル錯体のレーザー分光

第5回分子科学討論会, 2011年9月20日-23日, 札幌コンベンションセンター(札幌

On the massless "just-so" solution to the solar neutrino problem

We study the effect of the non-resonant, vacuum oscillation-like neutrino flavor conversion induced by non-standard flavor changing and non-universal flavor diagonal neutrino interactions with electrons in the sun. We have found an acceptable fit for the combined analysis for the solar experiments total rates, the Super-Kamiokande (SK) energy spectrum and zenith angle dependence. Phenomenological constraints on non-standard flavor changing and non-universal flavor diagonal neutrino interactions are considered.Comment: 4 pages, Latex, uses eps