TY - JOUR

T1 - Two-photon decay of P-wave positronium

T2 - A tutorial

AU - Sen, Abhijit

AU - Silagadze, Zurab K.

PY - 2019/7

Y1 - 2019/7

N2 - A detailed exposition of two-photon decays of P-wave positronium is given to fill an existing gap in the pedagogical literature. Annihilation decay rates of P-wave positronium are negligible compared to the rates of radiative electric dipole transitions to the lower energy S-states. This circumstance makes such decays experimentally inaccessible. However, the situation is different for quarkonium and the experimental and theoretical research of two-photon and two-gluon decays of P-wave quarkonia is a still a flourishing field.

AB - A detailed exposition of two-photon decays of P-wave positronium is given to fill an existing gap in the pedagogical literature. Annihilation decay rates of P-wave positronium are negligible compared to the rates of radiative electric dipole transitions to the lower energy S-states. This circumstance makes such decays experimentally inaccessible. However, the situation is different for quarkonium and the experimental and theoretical research of two-photon and two-gluon decays of P-wave quarkonia is a still a flourishing field.

KW - Electromagnetic decays

KW - Positronium

KW - Quantum electrodynamics

KW - Quantum field theory

KW - Tutorial

KW - positronium

KW - BETHE-SALPETER-EQUATION

KW - electromagnetic decays

KW - QUARKONIUM

KW - quantum field theory

KW - quantum electrodynamics

KW - tutorial

KW - ANNIHILATION RATE

UR - http://www.scopus.com/inward/record.url?scp=85068511711&partnerID=8YFLogxK

U2 - 10.1139/cjp-2018-0500

DO - 10.1139/cjp-2018-0500

M3 - Article

AN - SCOPUS:85068511711

VL - 97

SP - 693

EP - 700

JO - Canadian Journal of Physics

JF - Canadian Journal of Physics

SN - 0008-4204

IS - 7

ER -