Probing New Physics in Charm Couplings with FCNC

Abstract

Low-energy experiments involving kaon, B-meson, D-meson, and hyperon flavor-changing neutral transitions have confirmed the loop-induced flavor-changing neutral current (FCNC) picture of the standard model (SM). The continuing study of these processes is essential to further refine this picture and ultimately understand the flavor dynamics. In this paper we consider deviations from the SM in the charm sector and their effect on FCNC processes. Specifically, we parameterize new physics in terms of left- and right-handed anomalous couplings of the W boson to the charm quark. We present a comprehensive study of existing constraints and point out those measurements that are most sensitive to new physics of this type.

26 pages, 3 figures; minor changes, references added; 1 figure, more references, and 1 appendix on independent quark-mixing parameters added, main results unchanged, final version

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Cited by in corpus (7)

• Matching of gauge invariant dimension 6 operators for $b\to s$ and $b\to c$ transitions
• Can the differences in the determinations of $V_{ub}$ and $V_{cb}$ be explained by New Physics?
• Effects of right-handed charged currents on the determinations of |V_ub| and |V_cb|
• B decays with $\tau$-leptons in non-universal left-right models
• Charming new physics in rare B-decays and mixing?
• New physics in ε' from chromomagnetic contributions and limits on Left-Right symmetry
• Penguin and Box Diagrams in Unitary Gauge