Jusak Tandean

collaborators

7 papers

hep-ph2026

CP violation in $Σ^{+} \to p ℓ^{+} ℓ^{-}$ within the standard model and beyond

Xiao-Gang He, Jusak Tandean, German Valencia

The LHCb collaboration has recently observed the rare hyperon decay $Σ^{+} \to p μ^{+} μ^{-}$ . It can also measure the corresponding antihyperon channel with comparable precision and is thu…

hep-ph2026

CP violation in the hyperon decays $I^£ \to N I ¨ $

Xiao-Gang He, Xiao-Dong Ma, Jusak Tandean +1

The study of $C P$ violation in hyperon transitions has a long history. In the early 2000s the HyperCP experiment made a major effort to seek $C P$ -odd signals in the decay sequence…

hep-ph2025

Light dark-matter window constrained by \boldmath $K^{+} \to I ¨ ^{+}$ $+$ $\neq E$

Xiao-Gang He, Xiao-Dong Ma, Jusak Tandean +1

We explore the constraints on new physics from the recent NA62 observation of the kaon decay $K^{+} \to I ¨ ^{+}$ + $\neq E$ with missing energy $\neq E$ in the context of a dark-m…

hep-ph2025

$B \to K +$ invisible, dark matter, and $C P$ violation in hyperon decays

Xiao-Gang He, Xiao-Dong Ma, Jusak Tandean +1

Recently the Belle II Collaboration has reported a measurement of the $B^{+} \to K^{+} I^½ I^ˉ ½$ rate that is higher than the standard-model expectation. Since the emitted neutrinos are…

hep-ph2025

Large CP violation in $I^_{b}^{0} \to p K^{-} I ¨ ^{+} I ¨ ^{-}$ and its U-spin partner decays

Xiao-Gang He, Chia-Wei Liu, Jusak Tandean

The LHCb Collaboration has recently found a large CP-violating rate asymmetry in the $b$ -baryon decay $I^_{b}^{0} \to p K^{-} I ¨ ^{+} I ¨ ^{-}$ . This is the first observation of CP violation in ba…

hep-ph2025

Remarks on strong phase shifts in weak nonleptonic baryon decays

Hong-Jian Wang, Pei-Rong Li, Xiao-Rui Lyu +2

A sizable strong-interaction phase shift in weak two-body nonleptonic baryon decay would enhance the possibility of discovering charge-conjugation parity ( $C P$ ) violation in the ba…

CP violation in Σ+→pℓ+ℓ− within the standard model and beyond

CP violation in the hyperon decays I^£→NI¨

Light dark-matter window constrained by \boldmathK+→I¨++E

B→K+invisible, dark matter, and CP violation in hyperon decays

Large CP violation in I^b0​→pK−I¨+I¨− and its U-spin partner decays

Remarks on strong phase shifts in weak nonleptonic baryon decays

CP violation in $Σ^{+} \to p ℓ^{+} ℓ^{-}$ within the standard model and beyond

CP violation in the hyperon decays $I^£ \to N I ¨ $

Light dark-matter window constrained by \boldmath $K^{+} \to I ¨ ^{+}$ $+$ $\neq E$

$B \to K +$ invisible, dark matter, and $C P$ violation in hyperon decays

Large CP violation in $I^_{b}^{0} \to p K^{-} I ¨ ^{+} I ¨ ^{-}$ and its U-spin partner decays