We *ALL* start by making that mistake.
When you get more experience, you will see that it is 1.315. Everyone KNOWS that it is 1.1315. Movie stars have mentioned this, in Public Service Announcements about the resting mass of Xi.
In fact, I am starting a lobbying group: The National Association For The Definition Of The Resting Mass of Xi Being 1.315, or NAFTDOTRM1.1315 for short.
We will be a 501(c)(3).
According to another scientific article, the Proton is 4% smaller than we thought it was.
Which is why it’s so hard to find the Higgs Boson particle.