R. Watanabe

activity

20242026

collaborators

9 papers

hep-ph2026

$∣ V_{c b} ∣$ determinations from $B ˉ \to D^{(*)} ℓ I^ˉ ½$ decays within the SM and beyond

Wen-Sheng Fang, Syuhei Iguro, Xin-Qiang Li +3

We investigate the $∣ V_{c b} ∣$ determinations from exclusive semi-leptonic $B ˉ \to D^{(*)} ℓ I^ˉ ½$ decays, together with comprehensive fit analyses of the $\bar{B} \to D^{(*…

hep-ph2026

Semileptonic sum rules in heavy-to-light charm decays

Motoi Endo, Syuhei Iguro, Satoshi Mishima +2

We investigate semileptonic sum rules in heavy-to-light charm decays, motivated by analogous relations in $b \to c$ and $b \to u$ transitions. Focusing on the $c \to d\overline{\el…

hep-ph2026

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^{(*)} I ¨ I^ˉ ½_{I ¨} $ and $I^_{b} \to I^_{c} I ¨ I^ˉ ½_{I ¨} $ . In the heavy-quark limit, where th…

hep-ph2026

$b \to c$ 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 $B \to D^{(*)} I ¨ I^ˉ ½$ and $I^_{b} \to I^_{c} I ¨ I^ˉ ½$ . Starting from the heavy quark and zero-reco…

hep-ph2026

$b \to c$ semileptonic sum rule: Extension to angular observables

Motoi Endo, Syuhei Iguro, Tim Kretz +2

Lepton flavor universality is a key prediction of the Standard Model of particle physics and any violation of it immediately indicates the existence of new physics. Given the recen…

hep-ph2025

On sum rules for semi-leptonic $b \to c$ and $b \to u$ decays

Wen-Feng Duan, Syuhei Iguro, Xin-Qiang Li +2

The semi-leptonic $b \to c l I^½$ processes are receiving a lot of attention, as the lepton flavor universality violation has been hinted by the measured ratios $R_{D^{(*)}} = Î(B…

∣Vcb​∣ determinations from Bˉ→D(∗)ℓI^ˉ½ decays within the SM and beyond

Semileptonic sum rules in heavy-to-light charm decays

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

b→c semileptonic sum rule: Current status and prospects

b→c semileptonic sum rule: Extension to angular observables

On sum rules for semi-leptonic b→c and b→u decays

$∣ V_{c b} ∣$ determinations from $B ˉ \to D^{(*)} ℓ I^ˉ ½$ decays within the SM and beyond

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

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

$b \to c$ semileptonic sum rule: Extension to angular observables

On sum rules for semi-leptonic $b \to c$ and $b \to u$ decays