Семинар отдела «Теория фундаментальных взаимодействий»

Дата и время: четверг, 8 июля 2021 г., в 15:00

Место: Онлайн-семинар в Zoom, Лаборатория теоретической физики им. Н.Н. Боголюбова

Тема семинара: «Transverse spin sum rule»

Докладчик: Седрик Лорсе (Политехнчиеская школа, Палезо, Франция)

Аннотация:

Spin sum rules depend on the choice of a pivot, i.e. the point about which the angular momentum is defined, usually identified with the center of the nucleon. The latter is however not unique in a relativistic theory and has led to apparently contradictory results in the literature. Using the recently developed phase-space approach, we compute for the first time the contribution associated with the motion of the center of the nucleon, and we derive a general spin sum rule which reduces to established results after appropriate choices for the pivot and the spin component.