Current challenges and future prospects for $\gamma$ from $B\to D hh^\prime$ decays

Abstract

Decays of the type B → Dhh , where a b hadron decays to a neutral charm meson that can be an admixture of D 0 and D 0 states together with two light particles that are typically a kaon and a pion, have demonstrated potential to enable precise determinations of the angle γ of the CKM Unitarity Triangle. The current status and future prospects of these measurements are reviewed.9th International Workshop on the CKM Unitarity Triangle

WG5 summary: direct CP violation in B decays

“…The most precise measurements of the CP observables from B → DK decays come from LHCb and that collaboration have performed a statistical inference using their published results [4]. Dedicated proceedings describe the contributing LHCb analyses from B → D ( * ) K * decays [5] and B → Dhh decays [6]. Global combinations, which include legacy measurements from the B-factories are also available from the CKMFitter [7] and UTFit [8,9] groups with updates presented at conference; these results are seen to be similar to, and dominated by, the LHCb measurements,…”

Optimizing sensitivity to γ with B0→DK+π− , Craik1, Gershon2, Poluektov3 2018Phys. Rev. D10060View full textAdd to dashboardCite

“…The LHCb collaboration has recently performed the first determination of γ with B 0 → DK + π − Dalitz plot analysis, using D meson decays to K + K − and π + π − [22], building on knowledge of the B 0 → D 0 K + π − Dalitz plot structure obtained in an earlier analysis (with D 0 → K + π − ) [23]. The precision obtained on the parameters x ± = r B cos(δ B ± γ) and y ± = r B sin(δ B ± γ) is comparable [24] to that from analysis of B 0 → DK * 0 , D → K 0 S π + π − decays [25,26] selected from the same data sample. This demonstrates the potential impact of the B 0 → DK + π − Dalitz plot technique on the determination of γ.…”