What does Stephen Hawking mean by the plus-minus term in black holes?

[Nuno_S_Oliveira]

TL;DR

I need urgent help on a documentary I'm working on regarding black holes.

Hi,
I'm a Portuguese translator working on a documentary about black holes and there is a specific bit of dialogue between Stephen Hawking and his colleagues that I'm having a hard time translating. Basically, Hawking says: "So, it could be the F plus minus
term takes this away." Is this the correct way to write "plus minus term"? I'm not sure, since I'm not a physicist XD. And what does it actually mean.

Btw, this is regarding a study he was conducting on black holes retaining information.

Thank you.

 

[PeroK]

It could be $f_+, f_-$, which are terms from black hole evaporation. E.g.

https://core.ac.uk/download/pdf/25174366.pdf

 

[Nuno_S_Oliveira]

I think that might be it! Thank you so much.