Lepton flavour violation from an anomaly-free leptophilic axion-like
  particle
  Motivated by the recent Xenon1T result, we study a leptophilic
flavour-dependent anomaly-free axion-like particle (ALP) and its effects on
charged-lepton flavour violation (CLFV). We present two representative models.
The first one considers that the ALP origins from the flavon that generates the
charged-lepton masses. The second model assumes a larger flavour symmetry such
that more general mixings in the charged-lepton are possible, while maintaining
flavour-dependent ALP couplings. We find that a keV ALP explaining the Xenon1T
result is still viable for lepton flavour violation and stellar cooling
astrophysical limits. On the other hand, if the Xenon1T result is confirmed,
future CLFV measurements can be complementary to probe such a possibility.
