Direct CP violation in D meson decays - Rencontres de Moriond

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Experiments measure CDF: A ind f Definitions Af := Γ(D0 → f)−Γ(D 0 → f) Γ(D0 → f)+Γ(D 0 ≈ Adir f + → f) 〈t(f)〉 τ Aind f = (−0.02±0.22)% Joachim Brod (University of Cincinnati) CP violation in D decays 22 / 26
Penguin matrix elements Pf,1 = GF √2VcbV ∗ ubC6 ×〈f|−2(ūu)S+P ⊗ A (ūc)S−P|D 0 〉 Pf,2 = GF √2VcbV ∗ ub2(C4 +C6)×〈f|(¯qαqβ)V±A ⊗ A (ūβcα)V−A|D 0 〉 C eff 2 4(6) µ,q = C4(6)(µ)+C1(µ) αs 1 1 + 2π 6 3 log mc − µ 1 8 G 2 ms m2 c 〈f|(ūu)S+P ⊗A (ūc)S−P|D 0 〉 〈f|(¯sαsβ − ¯ dαdβ)V−A ⊗A (ūβcα)V−A|D 0 = O(Nc), 〉 〈f|(ūαuβ)V±A ⊗A (ūβcα)V−A|D 0 〉 〈f|(¯sαsβ − ¯ dαdβ)V−A ⊗A (ūβcα)V−A|D 0 = O(1). 〉 , m2 d m2, c q2 m2 c Joachim Brod (University of Cincinnati) CP violation in D decays 23 / 26
Page 1 and 2: Direct CP violation in D meson deca
Page 3 and 4: Definitions Af ≡ A(D 0 → f) = A
Page 5 and 6: So, can it be SM? “There one typi
Page 7 and 8: P/T at leading power Leading power
Page 9 and 10: SM: Large penguin power corrections
Page 11 and 12: Uncertainties Extraction of annihil
Page 13 and 14: c ū Weak Hamiltonian, written diff
Page 15 and 16: Pbreak T Fit to data nominal ǫU P
Page 17 and 18: By exchanging the spectator quark,
Page 19 and 20: How to distinguish NP from SM NP mo
Page 21: Backup slides Joachim Brod (Univers
Page 25 and 26: U-spin decomposition A( ¯ D 0 →

Direct CP violation in D meson decays - Rencontres de Moriond

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