S. Schacht

activity

20122023

most citedThe Belle II Physics Book

570 citations · 2.1k across the 32 of their papers we have counts for

collaborators

Showing 2022Show all

5 papers · 1 filter

hep-ph2022★ 10 cited

A Precision Relation between $Γ (K \to μ^{+} μ^{-}) (t)$ and $B (K_{L} \to μ^{+} μ^{-}) / B (K_{L} \to γ γ)$

Avital Dery, Mitrajyoti Ghosh, Yuval Grossman +2

We find that the phase appearing in the unitarity relation between $B (K_{L} \to μ^{+} μ^{-})$ and $B (K_{L} \to γ γ)$ is equal to the phase shift in the inte…

hep-ph2022

CP violation in $b$ and $c$ quark decays

Avital Dery, Yuval Grossman, Stefan Schacht +1

Generically, non-Standard-Model particles contribute to processes with order-one charge-parity (CP) violating phases, as CP is not a fundamental symmetry of nature. The exploration…

hep-ph2022★ 27 cited

A $U$ -Spin Anomaly in Charm CP Violation

Stefan Schacht

Recent LHCb data shows that the direct CP asymmetries of the decay modes $D^{0} \to π^{+} π^{-}$ and $D^{0} \to K^{+} K^{-}$ have the same sign, violating an improved $U$ -spin limi…

hep-ph2022★ 16 cited

The Mathematical Structure of $U$ -Spin Amplitude Sum Rules

Margarita Gavrilova, Yuval Grossman, Stefan Schacht

We perform a systematic study of $S U (2)$ flavor amplitude sum rules with particular emphasis on $U$ -spin. This study reveals a rich mathematical structure underlying the sum rules…

hep-ph2022★ 1 cited

New Physics Searches at Kaon and Hyperon Factories

Evgueni Goudzovski, Diego Redigolo, Kohsaku Tobioka +61

Rare meson decays are among the most sensitive probes of both heavy and light new physics. Among them, new physics searches using kaons benefit from their small total decay widths…

A Precision Relation between Γ(K→μ+μ−)(t) and B(KL​→μ+μ−)/B(KL​→γγ)

CP violation in b and c quark decays

A U-Spin Anomaly in Charm CP Violation

The Mathematical Structure of U-Spin Amplitude Sum Rules

New Physics Searches at Kaon and Hyperon Factories

A Precision Relation between $Γ (K \to μ^{+} μ^{-}) (t)$ and $B (K_{L} \to μ^{+} μ^{-}) / B (K_{L} \to γ γ)$

CP violation in $b$ and $c$ quark decays

A $U$ -Spin Anomaly in Charm CP Violation

The Mathematical Structure of $U$ -Spin Amplitude Sum Rules