The photon polarization in radiative $D$ decays, phenomenologically

Abstract

We work out the phenomenology of untagged time-dependent analysis with radiative $D^0$-decays into CP eigenstates, which allows to probe the photon polarization by means of the charm mesons' finite width difference. We show that $D^0\to \varphi \gamma$ or $D^0\to {\bar{K}}^{0\ast }\gamma$ decays, which are SM-dominated, or SM-like, respectively, together with U-spin allow to obtain chirality-predictions for radiative decay amplitudes. The order of magnitude of wrong-chirality contributions in the SM can be cross-checked with an up-down asymmetry in $D^0\to {\bar{K}}_1^0(\to \bar{K}\pi \pi )\gamma$. We explore the sensitivity to new physics in $|\Delta c|=|\Delta u|=1$ dipole couplings in the decays $D^0\to {\rho }^0\gamma$. We point out the possibility to test the SM with $D_s\to K_1^{+}(\to K\pi \pi )\gamma$ decays.

15 pages plus references and appendices, 7 figures

References in corpus (7)

• Topological amplitudes in $D$ decays to two pseudoscalars: a global analysis with linear $SU(3{)}_F$ breaking
• Exploiting the width difference in B_s -> phi gamma
• Shedding light on CP violation in the charm system via D to V gamma decays
• Rare radiative charm decays within the standard model and beyond
• First experimental study of photon polarization in radiative $B_s^0$ decays
• Angular analysis of B -> J/psi K1 : towards a model independent determination of the photon polarization with B-> K1 gamma
• Reexamining the photon polarization in $B\to K\pi \pi \gamma$

Cited by in corpus (12)

• The New Physics Reach of Null Tests with $D\to \pi \ell \ell$ and $D_s\to K\ell \ell$ Decays
• Null tests from angular distributions in $D\to P_1{P}_2{l}^{+}{l}^{-}$, $l=e,\mu$ decays on and off peak
• Theoretical and experimental status of rare charm decays
• The Mathematical Structure of $U$-Spin Amplitude Sum Rules
• Testing the standard model with $D_{(s)}\to K_1(\to K\pi \pi )\gamma$ decays
• Radiative three-body D-meson decays in and beyond the standard model
• Rare radiative decays of charm baryons
• Up-down Asymmetries and Angular Distributions in $D\to K_1(\to K\pi \pi ){\ell }^{+}{\nu }_{\ell }$
• Parity Doubling as a Tool for Right-handed Current Searches
• Searching for New physics in Charm Radiative decays
• Weak radiative decay ${\Lambda }_c^{+}\to {\Sigma }^{+}\gamma$ using light-cone sum rules
• Probing QCD dynamics and the standard model with $D_{(s)}\to P^{+}{P}^0\gamma$ decays