M2 signatures in psi(2S) radiative decays

Abstract

The sensitivity of observables in radiative decays psi(2S) -> gamma chi_{1,2} -> gamma gamma J/psi to quadrupole (M2) admixtures in the dominant electric dipole (E1) transitions is explored. Emphasis is placed on distributions in a single angle, and several examples are given.

8 pages, 4 figures, to be submitted to Phys. Rev. D. Additional data and reference

References in corpus (4)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Branching Fractions for Transitions of psi(2S) to J/psi
• Measurement of the chi_{c2} Polarization in psi(2S) to gamma chi_{c2}

Cited by in corpus (6)

• Charmonium spectrum and their electromagnetic transitions with higher multipole contributions
• Observation of the ${\rm Y}(1^3{D}_J)$ Bottomonium State through Decays to ${\pi }^{+}{\pi }^{-}{\rm Y}(1S)$
• Unquenched quark-model calculation of X(3872) electromagnetic decays
• Higher-order multipole amplitudes in charmonium radiative transitions
• Higher-order multipole amplitude measurement in $\psi (2S)\to \gamma {\chi }_{c2}$
• Measurement of higher-order multipole amplitudes in $\psi (3686)\to \gamma {\chi }_{c1,2}$ with ${\chi }_{c1,2}\to \gamma J/\psi$ and search for the transition ${\eta }_c(2S)\to \gamma J/\psi$