G. Valencia

activity

20232025

most cited

B \to K +

invisible, dark matter, and

C P

violation in hyperon decays

14 citations · 28 across the 8 of their papers we have counts for

collaborators

Showing hep-phShow all

8 papers · 1 filter

hep-ph2025★ 4 cited

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

Monojet and direct detection constraints on real scalar dark matter: EFT and a simple UV completion

Arnab Roy, Michael A. Schmidt, German Valencia

We consider constraints that can be placed on certain invisible scalar particles through monojet studies at the LHC and compare them with those from direct detection experiments wh…

hep-ph2025★ 5 cited

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-ph2025★ 14 cited

$B \to K +$ 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…

hep-ph2024

High- $p_{T}$ LHC constraints on SMEFT operators affecting rare kaon and hyperon decays

Arnab Roy, German Valencia

We consider the constraints on new physics affecting rare kaon and hyperon decay as parametrized by a low energy effective theory that can be obtained from high- $p_{T}$ observabl…

hep-ph2024★ 3 cited

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

Arnab Roy, Jusak Tandean, German Valencia

Motivated by the LHCb measurement of the hyperon decay mode $Σ^{+} \to p μ^{+} μ^{-}$ and prospects for improvement, we revisit the estimates for the rate and muon forward-backward asymmetr…

hep-ph2024

Scalar dark matter explanation of the excess in the Belle II $B^{+} \to K^{+} +$ invisible measurement

Xiao-Gang He, Xiao-Dong Ma, Michael A. Schmidt +2

Recently Belle II reported the first measurement of $B^{+} \to K^{+} + invisible (inv)$ , which is $2.7 σ$ above the standard model (SM) prediction. If confirmed, this calls for new p…

hep-ph2023★ 2 cited

Z and Higgs boson decays with doubly-charged scalars at one-loop: current constraints, future sensitivities, and application to lepton-triality models

Gabriela Lichtenstein, Michael A. Schmidt, German Valencia +1

We analyse the $Z$ and Higgs boson decays $Z \to ℓ^{+} ℓ^{-}$ ( $ℓ = e, μ, τ$ ), $H \to γ γ$ and $H \to Z γ$ that are induced at one-loop level in models with a doubly-charged isosin…

CP violation in the hyperon decays Σ→Nπ

Monojet and direct detection constraints on real scalar dark matter: EFT and a simple UV completion

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

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

High-pT​ LHC constraints on SMEFT operators affecting rare kaon and hyperon decays

Σ+→pℓ+ℓ− decays within the standard model and beyond

Scalar dark matter explanation of the excess in the Belle II B+→K++ invisible measurement

Z and Higgs boson decays with doubly-charged scalars at one-loop: current constraints, future sensitivities, and application to lepton-triality models

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

High- $p_{T}$ LHC constraints on SMEFT operators affecting rare kaon and hyperon decays

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

Scalar dark matter explanation of the excess in the Belle II $B^{+} \to K^{+} +$ invisible measurement