Syuhei Iguro

activity

20182026

collaborators

24 papers

hep-ph2026

$b \to c$ semileptonic sum rule: SU(3) $_{F}$ symmetry violation

Syuhei Iguro

To clarify possible deviations in $b \to c τ ν$ processes, the $b \to c$ semileptonic sum rule provides a valuable tool. This relation, derived based on heavy quark symmetry (…

hep-ph2026

$b \to c$ semileptonic sum rule: orbitally excited hadrons

Motoi Endo, Syuhei Iguro, Satoshi Mishima

We study semileptonic sum rules for $b \to c τ ν$ transitions involving orbitally excited charm hadrons. Starting from the amplitude-level relation implied by the heavy qua…

hep-ph2025

Chasing the two-Higgs-doublet model via electroweak corrections at $e^{+} e^{-}$ colliders

Pia Bredt, Tatsuya Banno, Marius Höfer +5

We present a comprehensive study of Higgs boson production associated with a neutrino pair at $e^{+} e^{-}$ colliders ( $e^{+} e^{-} \to h ν ν ˉ$ ) at next-to-leading-order accuracy in bo…

hep-ph2025

Constructing heavy-quark sum rule for $b \to c$ meson and baryon decays

Motoi Endo, Syuhei Iguro, Satoshi Mishima +1

We study heavy-hadron semileptonic decays proceeding via $b \to c$ transition, such as $B \to D^{(*)} τ ν ˉ_{τ}$ and $Λ_{b} \to Λ_{c} τ ν ˉ_{τ}$ . In the heavy-quark limit, where the heavy-…

hep-ph2025

$b \to c$ semileptonic sum rule: Current status and prospects

Motoi Endo, Syuhei Iguro, Satoshi Mishima +1

The $b \to c$ semileptonic sum rules provide relations between the decay rates of $B \to D^{(*)} τ ν ˉ$ and $Λ_{b} \to Λ_{c} τ ν ˉ$ . Starting from the heavy quark and zero-recoil lim…

hep-ph2025

Searching for Di-Higgs Signatures of Light Charged Scalars

Guglielmo Coloretti, Andreas Crivellin, Syuhei Iguro

The excess in $t \to b b c$ observed by ATLAS points towards a charged Higgs boson with a mass around 130GeV, consistent with the expectations from the $B$ anomalies, i…

b→c semileptonic sum rule: SU(3)F​ symmetry violation

b→c semileptonic sum rule: orbitally excited hadrons

Chasing the two-Higgs-doublet model via electroweak corrections at e+e− colliders

Constructing heavy-quark sum rule for b→c meson and baryon decays

b→c semileptonic sum rule: Current status and prospects

Searching for Di-Higgs Signatures of Light Charged Scalars

$b \to c$ semileptonic sum rule: SU(3) $_{F}$ symmetry violation

$b \to c$ semileptonic sum rule: orbitally excited hadrons

Chasing the two-Higgs-doublet model via electroweak corrections at $e^{+} e^{-}$ colliders

Constructing heavy-quark sum rule for $b \to c$ meson and baryon decays

$b \to c$ semileptonic sum rule: Current status and prospects