0. If so, the photon, Z and W bosons, gluons are all spin-1 particles. The kinematical formalism for describing spinning particles developped by the author is based upon the idea that an elementary particle is a physical system with no excited states. Is there a little mistake in this expression in Griffiths' book about elementary particles? Do you want the names of particles with spin 1 and spin 1/2?

With this point in mind, let us go back to the commutation relations of Eq.(1).

This property holds for all particles with integer spin (s = 0, 1, 2, etc.)

Is the complete Hilbert space of a system, sum of the spans of position, momentum, energy, angular momentum spaces, etc? At time t = 0 the total angular momentum is measured and found to be 0. Not sure what the question means. What are the possible results and what is … Not sure what the question means. An observer comes along and determines the first particle to have a spin component (S1z) of hbar/2. Say there are two spin 1/2 particles, and the system is known to be in a total spin state of Stot=0. Do you want the names of particles with spin 1 and spin 1/2? combine two spin 1/2 particles to construct a gauge-dependent four-potential. 0. The particle is composed from two fermions with s1 = 1/2 and s2 = 1/2. Problem 1 Consider two identical spin-1/2 particles, A and B, of mass m in a one-dimensional infinite square well of length L. Let xa and xb be the locations of the particles. which implies that the two particles cannot be in the same energy level. What is the outcome? You may use known results about the infinite square well. According to this Phys.SE post, the answer seems to argue that you cannot add two spin-1/2 particles and get a spin-1/2 particle.
two spin 1/2 particles Abstract We define the separability and entanglement notion for parti cle with spin s = 1. Total spin of system of two spin-$1/2$ particles. This is a pretty deep question, actually. It can be annihilated by the interaction with its antiparticle but, if not destroyed, its internal structure can never be modified.
Yes, I understand that the tensor product of two spin-1/2 particles can be re-organised as a direct sum of a spin-1 space and spin-0 space. as a consequence of the spin–statistics theorem. Integer spin labels how things rotate in 3 dimensions (or 4 in relativistic physics, or more in other more mathematical situations). Therefore, if there is a representation of the Lorentz group generated byJ i and K i,itis possible to construct a representationwithJ i and −K i. They are invariant under the sign change of the boost operators. Two identical, noninteracting spin-1/2 particles of mass m are in the one dimensional harmonic oscillator for which the Hamiltonian is H = p_1x^2/2m + 1/2 m omega^2 x_1^2 + p_2^2x/2m + 1/2 m omega^2 x_2^2 (a) Determine the ground-state and first-excited-state kets and corresponding energies when the two particles are in a total-spin-0 state. (a) At time t, J_{1z} is measured. 5. Homework Statement Two spin-1/2 particles are governed by \\dfrac{J^2}{2I}+\\omega_0 J_z where J=J_1+J_2. That this possibility is excluded is known as the Pauli exclusion principle, and it plays a key role in both the electronic configurations of atoms and molecules.. If so, the photon, Z and W bosons, gluons are all spin-1 particles. Example: Two particles of mass are in a one-dimensional box of length .What is the lowest total energy the two particle- system can have? For the first two parts, assume the particles don't interact with each other. However, I disagree that this forbids the decay, because

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