Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The leptonic CP phase is determined by an equation involving the PMNS
  matrix elements   Several approximate equalities among the matrix elements of CKM and PMNS
imply that hidden symmetries may exist and be common for both quark and
neutrino sectors. The CP phase of the CKM matrix ($\delta_{\rm CKM}$) is
involved in these equalities and can be investigated when these equalities turn
into several equations. As we substitute those experimentally measured values
of the three mixing angles into the equations for quarks, it is noted that one
of the equations which holds exactly has a solution $\delta_{\rm
CKM}=68.95^\circ$. That value accords with $(69.1^{+2.02}_{-3.85})^\circ$
determined from available data. Generalizing the scenario to the lepton sector,
the same equality determines the leptonic CP phase $\delta_{\rm PMNS}$ to be $
276.10^\circ$. Thus we predict the value of $\delta_{\rm PMNS}$ from the
equation. So far there is no direct measurement on $\delta_{\rm PMNS}$ yet, but
a recent analysis based on the neutrino oscillation data prefers the phase
close to $270^\circ$.

20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
19
The categories of this paper are: eess
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph