Abstract
It is pointed out that twistors play a role as the charges for helicity 3/2 massless fields. Since such fields can be defined consistently in general Ricci-flat 4-manifolds, a possible new approach to defining twistors in vacuum space-times is indicated.
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Penrose, R. (1991). Twistors as Spin 3/2 Charges. In: Zichichi, A., de Sabbata, V., Sánchez, N. (eds) Gravitation and Modern Cosmology. Ettore Majorana International Science Series, vol 56. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-0620-5_12
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DOI: https://doi.org/10.1007/978-1-4899-0620-5_12
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