Of the following mesons,which is its own antiparticle? A)K^- B)φ C)π⁺ D)none of those given

Name: Of the following mesons,which is its own antiparticle? A)K - B)φ C)π + D)none of those given
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The meson φ (phi) is its own antiparticle, meaning it has the same quantum numbers as its antiparticle, resulting in a neutral particle. The other mesons given are not their own antiparticles, and have distinct antiparticles with opposite quantum numbers.

Of the Following Mesons,which Is Its Own Antiparticle