The statement made by your lecturer, equating a π+ pion with a W+ boson based on their "same nature," is not accurate. Pions and W bosons are distinct particles with different properties and roles in particle physics.
Pions (π+ pions in this case) are mesons composed of a quark-antiquark pair, specifically an up quark and a down antiquark (ūd). Pions are part of a group of particles known as mesons, which are bound states of quarks and antiquarks. Pions are the lightest mesons and play a crucial role in the strong nuclear force.
On the other hand, W bosons are gauge bosons that mediate the weak nuclear force, one of the fundamental forces in nature. There are three types of W bosons: W+, W-, and W0 (or Z0). W+ bosons carry a positive electric charge.
While both pions and W bosons are involved in particle interactions, they have different properties and behaviors. Pions are strongly interacting particles that primarily participate in the strong nuclear force and are responsible for binding protons and neutrons together within atomic nuclei. W bosons, on the other hand, are responsible for certain types of weak nuclear interactions, such as the decay of particles or the conversion between different flavors of quarks.
In summary, pions and W bosons have distinct roles in particle physics, and equating them based on their "same nature" is incorrect. It's important to consult reliable sources and references to ensure accurate information regarding particle properties and interactions.