A neutral K meson (mass 497.7 MeV/c²) is moving with a kinetic energy of 77.0 MeV. It decays into a pi meson (mass 139.6 MeV/c²) and another particle of unknown mass. The pi meson is moving in the direc- tion of the original K meson with a momentum of 381.6 MeV/c. (a) Find the momentum and total rela- tivistic energy of the unknown particle. (b) Find the mass of the unknown particle.
A neutral K meson (mass 497.7 MeV/c²) is moving with a kinetic energy of 77.0 MeV. It decays into a pi meson (mass 139.6 MeV/c²) and another particle of unknown mass. The pi meson is moving in the direc- tion of the original K meson with a momentum of 381.6 MeV/c. (a) Find the momentum and total rela- tivistic energy of the unknown particle. (b) Find the mass of the unknown particle.
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Transcribed Image Text:A neutral K meson (mass 497.7 MeV/c²) is moving
with a kinetic energy of 77.0 MeV. It decays into a pi
meson (mass 139.6 MeV/c²) and another particle of
unknown mass. The pi meson is moving in the direc-
tion of the original K meson with a momentum of
381.6 MeV/c. (a) Find the momentum and total rela-
tivistic energy of the unknown particle. (b) Find the mass
of the unknown particle.
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