Xiao-Gang He

collaborators

5 papers

hep-ph2025

Predictions for CP violation in anti-triplet beauty baryon to charmonium decays

Jin Sun, Zhi-Peng Xing, Xiao-Gang He

Motivated by the recent 3.9 $σ$ evidence for CP violation from the LHCb collaboration in decays of an anti-triplet beauty baryon to a charmonium, an octet baryon, and a pseudoscalar…

hep-ph2025

CP violation in the hyperon decays $Σ \to N π$

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 $K^{+} \to π^{+}$ $+$ $\neq E$

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 $K^{+} \to π^{+}$ + $\neq E$ with missing energy $\neq E$ in the context of a dark-ma…

hep-ex2025

CP violation studies at Super Tau-Charm Facility

Hai-Yang Cheng, Zhi-Hui Guo, Xiao-Gang He +16

Charge-parity ( $C P$ ) violation in the tau-charm energy region is a promising area for sensitive tests of Standard Model (SM) predictions and searches for new, beyond the SM physi…

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 $B^{+} \to K^{+} ν ν ˉ$ rate that is higher than the standard-model expectation. Since the emitted neutrinos are un…

Predictions for CP violation in anti-triplet beauty baryon to charmonium decays

CP violation in the hyperon decays Σ→Nπ

Light dark-matter window constrained by \boldmathK+→π++E

CP violation studies at Super Tau-Charm Facility

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

CP violation in the hyperon decays $Σ \to N π$

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

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