TY  - JOUR
AU  - Bordes, J.
AU  - Chan, H. M.
AU  - Tsou, S. T.
PY  - 2021
DA  - 2021//
TI  - delta(CP) for leptons and a new take on CP physics with the FSM
T2  - Int. J. Mod. Phys. A
JO  - International Journal of Modern Physics A
SP  - 2150236
EP  - 22pp
VL  - 36
PB  - World Scientific Publ Co Pte Ltd
KW  - Phenomenology beyond the Standard Model
KW  - framed Standard Model
KW  - leptonic CP violation
KW  - CP physics
AB  - A bonus of the framed Standard Model (FSM), constructed initially to explain the mass and mixing patterns of quarks and leptons, is a solution (without axions) of the strong CP problem by cancelling the theta-angle term theta(I) Tr(H-mu v H-mu v*) in coloura by a chiral transformation on a quark zero mode which is inherent in FSM, and produces thereby a CP-violating phase in the CKM matrix similar in size to what is observed.' Extending here to flavour, one finds that there are two terms proportional to Tr(G(mu v) G(mu v)*): (a) in the action from flavour instantons with unknown coefficient, say theta(I)', (b) induced by the above FSM solution to the strong CP-problem with therefore known coefficient theta(C)'. Both terms can be cancelled in the FSM by a chiral transformation on the lepton zero mode to give a Jarlskog invariant J' in the PMNS matrix for leptons of order 10(-2), as is hinted by the experiment. But if, as suggested in Ref. 2, the term theta(I)' is to be cancelled by a chiral transformation in the predicted hidden sector to solve the strong CP problem therein, leaving only the term theta(C)' to be cancelled by the chiral transformation on leptons, then the following prediction results: J' similar to -0.012 (delta(CP)'similar to (1.11)pi) which is (i) of the right order, (ii) of the right sign and (iii) in the range favoured by the present experiment. Together with the earlier result for quarks, this offers an attractive unified treatment of all known CP physics.
SN  - 0217-751x
UR  - https://arxiv.org/abs/2107.05420
UR  - https://doi.org/10.1142/S0217751X21502365
DO  - 10.1142/S0217751X21502365
LA  - English
N1  - WOS:000732963000007
ID  - Bordes_etal2021
ER  -