Spin in Gravity: Is It Possible to Give an Experimental Basis to Torsion?: International School of Cosmology and Gravitation XV Course Erice, Italy 13 - 20 May 1997

The introduction of spin is believed to be a necessary tool if one wishes to quantize general relativity. Then the main problem is to see if the introduction of spin generalizing the general relativity from a geometric point of view, i.e. through the concept of torsion, can be experimentally verified.The reader can find in this book both theoretical and experimental arguments which show the necessity for the introduction of spin, and then of torsion, in gravity. In fact, torsion constitutes...