Writing Feynman slash notation in LaTeX

[Wrichik Basu]

I started reading QFT recently. With respect to the Dirac spinors, I was introduced to Feynman's slash notation:

OR

There are sites which say how this can be inserted in LaTeX documents. I checked out the LaTeX guide of PF, but found that it is not listed there. Writing $\text{$\slashed{p}$}$ gives an error.

How is this notation implemented here?

 

[BvU]

##\not\! a##

$\not\! a$

 

[Wrichik Basu]

##\not\! a##

$\not\! a$

Thanks. I believe this should be added to the LaTeX guide.

 

[BvU]

No credit to me, used my friend google to end up in a $\TeX$ forum... (answer by Werner)