Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-05-15
Phys.Rev.D56:4302-4310,1997
Physics
High Energy Physics
High Energy Physics - Phenomenology
28 pages, Latex, 2 Figures
Scientific paper
10.1103/PhysRevD.56.4302
We present a detailed analysis of the $D \to V \gamma $ transitions, using a model which combines heavy quark effective theory and the chiral Lagrangian approach and includes symmetry breaking. We notice that in addition to the previously considered s - channel annihilation and t - channel W - exchange, there is a long distance penguin - like $ c \to u \gamma$ contribution in the t - channel of Cabibbo - suppressed modes. Its magnitude is determined by the size of symmetry breaking which we calculate with a vector dominance approach. Although smaller in magnitude, the penguin - like contribution would lead to sizeable effects in case of cancellations among the other contributions to the amplitude. Thus, it may invalidate suggested tests for beyond the standard model effects in these decays. We also indicate the range of expectations for the branching ratios of various $D \to V \gamma$ modes.
Fajfer Svjetlana
Singer Paul
No associations
LandOfFree
Long distance $c \to u γ$ effects in weak radiative decays of D-mesons does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Long distance $c \to u γ$ effects in weak radiative decays of D-mesons, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long distance $c \to u γ$ effects in weak radiative decays of D-mesons will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-318406