Font for #tilde accent

Hello,

I’d like to label a line with something like this:
m_{#tilde{t}{R}}/m{#tilde{#chi}^{0}}

It works, but the font for #tilde is different for the t and #chi, I guess because #chi switches the font?
Is there any way around it? It looks really ugly, and even spoils the vertical alignment of the subscript.

Thanks,
Yuri

#chi is a greek symbol available only in times like font.
Change the font to times SetTextFont(132) to get all the text in times.