- #1
nur.alifah
- 4
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decay rho-->eta + pion is forbidden.why?
is it only violation of charge conjugate or its not conserve the energy & momentum.
is it only violation of charge conjugate or its not conserve the energy & momentum.
Vanadium 50 said:It violates G-parity.
C is not a good symmetry for charged particles.
The decay rho->eta + pion is forbidden because it violates the conservation of charge and strangeness. The rho meson has a charge of +1 and a strangeness of 0, while the eta meson has a charge of 0 and a strangeness of 0. The pion has a charge of 0 and a strangeness of 0, so the total charge and strangeness on both sides of the decay equation are not conserved.
Yes, the decay rho->eta + pion can occur through higher order processes such as the rho meson decaying into a virtual particle, which then decays into the eta and pion. However, these processes have a much lower probability and are therefore highly suppressed.
There are many other decays that are forbidden due to conservation laws, such as the decay of a proton into a positron and a neutral pion, or the decay of a neutron into an electron and a neutral kaon. These decays violate the conservation of baryon number and/or lepton number.
Yes, there are some rare cases where the conservation laws can be violated, such as in decays involving neutrinos or in certain decays involving the weak interaction. These exceptions are allowed by the laws of quantum mechanics and are known as "flavor-changing" processes.
Scientists study forbidden decays by looking for indirect evidence of their occurrence, such as measuring the lifetime of the particle or studying the decay products. They also use theoretical models and calculations to predict the probability of these decays occurring and compare them to experimental data. Additionally, advanced techniques and high-energy particle accelerators are used to produce and study these rare decays in controlled laboratory settings.