Sans-serif fonts in LaTeX labels for Jupyter widgets?

The documentation on layout and styling of Jupyter widgets mentions that 
Label widget can also render LaTeX equations:
http://ipywidgets.readthedocs.io/en/latest/examples/Widget%20Styling.html#Latex

On my machine, these equations render in a serif font by default. Is it 
possible to change the default font set to use sans-serif fonts, similar to 
matplotlib's?
     matplotlib.rcPararams['mathtext.fontset'] = 'stixsans'

Cheers,
Johann