German Valencia

collaborators

7 papers

hep-ph2026

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-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

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-ph2025

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, I^¼, I ¨ $ ), $H \to I^^{3} I^^{3}$ and $H \to Z I^^{3}$ that are induced at one-loop level in models with a doubly-charged i…

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

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

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

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 $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

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