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Seminar
FIELD Phys: QUC
DATE January 25 (Tue), 2022
TIME 16:00-17:30
PLACE Online
SPEAKER Jeong, Jae Hoon
HOST Kim, Minho
INSTITUTE 전북대학교
TITLE Constructing the covariant 3-point vertex systematically
ABSTRACT An algorithm is developed for efficiently constructing the Lorentz covariant effective three-point vertices of the decay of a particle into two daughter particles in which all the masses and spins of the three particles can be arbitrary. The closely-related one-to-one correspondence between the helicity formalism and the covariant formulation is exploited for counting the number of independent terms and identifying the basic covariant three-point vertices. Assembling the basic operators according to the developed algorithm enables us to construct all the covariant three-point vertices systematically. All the fundamental operators, which can appear in the three-point vertices, can be denoted by the linear combinations of the basic operators. It is shown that the general couplings of the three-vector-boson $V^* W^-W^+$ interaction with (V=\gamma or Z) derived according to our algorithm are consistent with those given in a previous work.

https://indico.kias.re.kr/event/92/
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