Yes, all subatomic particles possess angular momentum in one form or another.
Angular momentum is a fundamental property associated with the rotation or orbital motion of a particle. In classical physics, angular momentum is defined as the product of the particle's moment of inertia and its angular velocity. However, in the realm of quantum mechanics, angular momentum is quantized and can only take certain discrete values.
Intrinsic angular momentum, also known as spin, is a specific type of angular momentum possessed by elementary particles such as electrons, quarks, and neutrinos. Spin is an intrinsic property of these particles, meaning it does not arise from their physical rotation but is instead an inherent characteristic. Spin is quantized and can only have certain allowed values, typically given as multiples of a fundamental unit of spin called the reduced Planck's constant (h-bar).
It's important to note that not all subatomic particles possess spin. For example, photons, which are particles of light, are spin-1 particles and have non-zero spin. On the other hand, certain particles like the Higgs boson have spin-zero, meaning they do not possess intrinsic angular momentum.
In summary, while all subatomic particles possess some form of angular momentum, not all of them have intrinsic angular momentum or spin. The presence and magnitude of angular momentum depend on the specific properties and characteristics of each particle.