Absolute Values of Neutrino Masses - Status and Prospects by S. Bilensky PDF

By S. Bilensky

Show description

Read Online or Download Absolute Values of Neutrino Masses - Status and Prospects PDF

Best nonfiction_6 books

Socrates Among the Corybantes: Being, Reality, and the Gods by Carl Levenson PDF

In Plato’s dialogues, we discover many references to Corybantic rites—rites of initiation played in honor of the goddess Rhea. yet, within the discussion titled Euthydemus, there's greater than a connection with the rites. in the context of Socratic dialectic, the traditional rites of the Corybantes are acted out—although veiled and distorted.

Additional resources for Absolute Values of Neutrino Masses - Status and Prospects

Example text

32 Let us consider three typical neutrino mass spectra in the case of three massive and mixed neutrinos13 : 1. m1 ≪ m2 ≪ m3 (hierarchy of neutrino masses). For the effective Majorana mass | m | we have the upper bound | m | ≤ sin2 ϑsol ∆m2sol + |Ue3 |2 ∆m2atm . 15) Using the best-fit values of the oscillation parameters ∆m2atm , ∆m2sol , tan2 ϑsol , and the CHOOZ bound on |Ue3 |2 (Eqs. 8 × 10−3 eV . 2 × 10−3 eV . 14) of the future (ββ)0ν -decay experiments. Thus, the observation of (ββ)0ν decay in the experiments of the next generation could pose a problem for the natural hierarchy of neutrino masses.

Has been obtained (see Ref. [154]). The problem of the calculation of the nuclear matrix elements of neutrinoless double-β decay is a real theoretical challenge. It is obvious that without a solution of this problem the effective Majorana neutrino mass | m | cannot be determined from the experimental data with reliable accuracy (see the discussion in Ref. [155, 148]). The authors of Ref. [156] proposed a method which allows to check the results of the calculations of the nuclear matrix elements of the (ββ)0ν -decay of different nuclei by confronting them with experimental data.

2. A sensitivity of a few 10−2 eV for | m | is planned to be reached in future experiments on the search for neutrinoless double-β decay of different nuclei. From Eq. 26) we have R(A, Z/A′, Z ′ ) ≡ 0ν T1/2 (A, Z) 0ν T1/2 (A′ , Z ′) = |M(A′ , Z ′ )|2 G0ν (E0′ , Z ′ ) . 28) Thus, if the neutrinoless double β -decay of different nuclei is observed, the calculated ratios of the corresponding squared nuclear matrix elements can be confronted with the experimental values. Table 2 shows the ratios of the lifetimes of (ββ)0ν -decay of several nuclei, calculated in six different models, using the values of the lifetimes given in Ref.

Download PDF sample

Absolute Values of Neutrino Masses - Status and Prospects by S. Bilensky


by Anthony
4.1

Rated 4.59 of 5 – based on 18 votes