Hiroyuki Umeeda

works on

Belle II 1 helicity formalism 1 hidden local symmetry 1 polarization observables 1 tau decays 1 vector mesons 1

From the 1 of 5 linked papers with an AI index.

collaborators

5 papers

hep-ph2026

Polarized observables in $I ¨ \to V V I^½_{I ¨} $ decays

Vindhyawasini Prasad, Hiroyuki Umeeda

The paper analyzes polarization observables in tau lepton decays to two vector mesons and a neutrino, using helicity formalism within a hidden local symmetry framework, and predict…

hep-ph2026

$b \to c u ˉ q$ decay and CP violating observables in the presence of new physics contributions

Xuanning Guo, Albertus Hariwangsa Panuluh, Hiroyuki Umeeda +1

In this work, a comprehensive analysis for processes related to $b \to c u ˉ q (q = d, s)$ transitions are carried out, including new physics contributions. In light of a recent ten…

hep-ph2025

$D^{0} - D ˉ^{0}$ mixing in the Dyson-Schwinger approach

Xiaotong Xie, Hiroyuki Umeeda, Jinglong Zhu

In view of difficulty to reproduce observables in the $D^{0} - D ˉ^{0}$ mixing via the operator product expansion, we discuss the Dyson-Schwinger approach to this process. Formulated…

hep-ph2025

$B \to X_{c} ℓ I^ˉ ½$ Decay as a Probe of Complex Conjugate Poles

Jinglong Zhu, Hiroyuki Umeeda

In this work, nontrivial analytic structure of the quark propagator is discussed for $B$ -meson inclusive decays. Attributed to invalidity of the standard KÃ¤llÃ©n-Lehman spectral r…

hep-ph2025

$B_{(s)} \to D_{(s)}^{(*)} M$ decays in the presence of final-state interaction

Albertus Hariwangsa Panuluh, Satoshi Tanaka, Hiroyuki Umeeda

In light of the recent data for $B ˉ_{(s)} \to D_{(s)}^{(*)} P$ and $B ˉ_{(s)} \to D_{(s)} V$ decays, we perform a model-independent phenomenological analysis in the presence o…

Polarized observables in I¨→VVI^½I¨​ decays

b→cuˉq decay and CP violating observables in the presence of new physics contributions

D0−Dˉ0 mixing in the Dyson-Schwinger approach

B→Xc​ℓI^ˉ½ Decay as a Probe of Complex Conjugate Poles

B(s)​→D(s)(∗)​M decays in the presence of final-state interaction

Polarized observables in $I ¨ \to V V I^½_{I ¨} $ decays

$b \to c u ˉ q$ decay and CP violating observables in the presence of new physics contributions

$D^{0} - D ˉ^{0}$ mixing in the Dyson-Schwinger approach

$B \to X_{c} ℓ I^ˉ ½$ Decay as a Probe of Complex Conjugate Poles

$B_{(s)} \to D_{(s)}^{(*)} M$ decays in the presence of final-state interaction