Researchers at SLAC National Lab are studying scattering processes that violate the conservation of helicity to the maximum possible extent. Which of the following best describes helicity?
W) The projection of a particle's spin onto its momentum
X) The angle between a particle's magnetic moment and its spin
Y) The angular momentum of a particle with respect to the collision axis
Z) The expectation value of a particle's magnetic quadrupole moment
✔️Answer:THE PROJECTION OF A PARTICLE'S SPIN ONTO ITS MOMENTUM
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