Spin parameter

Spin parameter may refer to one of several different parameters in physics.

One of two dimensionless parameters relating to black holes:

• The spin parameter of an individual black hole, a variable with a value ranging from 0 to 1
• The effective inspiral spin parameter for a pair of merging black holes, a variable with a value ranging from −1 to 1

• The spin quantum number of an elementary particle, usually called just "spin", a constant with a value of ⁠n/2⁠, where n is a non-negative integer

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