The J/ψ meson, discovered in 1974, was measured to have an average mass of mav =3100 MeV/c2 (note the use of energy units since E = mc2) and an intrinsic width ∆m=63 keV/c2. By this we mean that the masses of different J/ψ mesons were actually measured to be slightly different from one another. This mass “width” is related to the very short lifetime of the J/ψ before it decays into other particles. Estimate its lifetime using the uncertainty principle.