Does touching a woman invalidate wudu?

It is not permissible for a man who believes in Allah and the Last Day to touch a woman who is not his mahram. For details of evidence and views of the scholars, please see the answer to question no. 21183 

With regard to whether wudu is broken by touching a woman, there is a difference of opinion among the scholars. The correct view is that it does not invalidate wudu – see question no. 2178 – and it makes no difference whether the woman is his mahram, his wife or a non-mahram. 

And Allah knows best.