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We study the possibility of identifying a boosted resonance that decays intoa charm pair against different sources of background using QCD event shapes,which are promoted to jet shapes. Using a set of jet shapes as input to aboosted decision tree, we find that observables utilizing the simultaneouspresence of two charm quarks can access complementary information compared toapproaches relying on two independent charm tags. Focusing on Higgs associatedproduction with subsequent $H\to c \bar{c}$ decay and on a CP-odd scalar $A$with $m_A \leq 10$ GeV we obtain the limits $\mathcal{B}r(H\rightarrowc\bar{c})\leq 6.09\%$ and $\mathcal{B}r(H\rightarrow A(\rightarrow c\bar{c})Z)\leq 0.01\%$ at $95\%$ C. L..

Double-charming Higgs identification using machine-learning assisted jet shapes