B. Kubis

activity

20242026

collaborators

15 papers

hep-ph2026

Dispersion relations: foundations

Bastian Kubis

We give a pedagogical introduction to the founding ideas of dispersion relations in particle physics. Starting from elementary mechanical systems, we show how the physical principl…

hep-ph2026

Dispersive analysis of the $J/Ï\toÏ^0 Î³^\ast$ transition form factor with $I ¨ $ - $I ¨ $ mixing effects

Xiong-Hui Cao, Feng-Kun Guo, Christoph Hanhart +1

Motivated by the discrepancies noted recently between the theoretical predictions of the electromagnetic $J/Ï\to Ï^0 Î³^*$ transition form factor and the BESIII data, we reanalyz…

hep-ph2026

Improved Standard-Model predictions for $I^\cdot^{(')} \to ℓ^{+} ℓ^{-}$

Noah Messerli, Martin Hoferichter, Bai-Long Hoid +2

The rare decays $I^\cdot^{(')} \to ℓ^{+} ℓ^{-}$ , $ℓ \in {e, I^¼}$ , are highly suppressed in the Standard Model, both by their chirality structure and the required loop attaching th…

hep-ph2026

Reconciling hadronic and partonic analyticity in $b \to s ℓℓ$ transitions

Martin Hoferichter, Bastian Kubis, Simon Mutke

Rare $B$ -meson decays mediated by $b \to s ℓℓ$ transitions constitute sensitive probes of physics beyond the Standard Model, and have triggered considerable interest due to hin…

hep-ph2026

Decoding the structure near the $I ¨ ^{+} I ¨ ^{-}$ mass threshold in $I ¨ (3686) \to J / I ¨ I ¨ ^{+} I ¨ ^{-}$ decays

Yun-Hua Chen, Xiang-Kun Dong, Feng-Kun Guo +2

In light of recent high-precision data taken by the BESIII Collaboration, we reconsider the dipion transition $I ¨ (3686) \to J / I ¨ I ¨ ^{+} I ¨ ^{-}$ . The strong pion-pion final-state…

hep-ph2026

Dispersive Analysis of $D$ - and $B$ -Meson Form Factors with Chiral and Heavy-Quark Constraints

Simon Mutke, Leon A. Heuser, Ingrid Dax +2

We analyze the isovector vector form factors of $D$ , $D^{*}$ , $B$ , and $B^{*}$ mesons at low energies. We employ all constraints due to chiral and heavy-quark symmetry, and include the…

Dispersion relations: foundations

Dispersive analysis of the $J/Ï\toÏ^0 Î³^\ast$ transition form factor with I¨-I¨ mixing effects

Improved Standard-Model predictions for I^⋅(′)→ℓ+ℓ−

Reconciling hadronic and partonic analyticity in b→sℓℓ transitions

Decoding the structure near the I¨+I¨− mass threshold in I¨(3686)→J/I¨I¨+I¨− decays

Dispersive Analysis of D- and B-Meson Form Factors with Chiral and Heavy-Quark Constraints

Dispersive analysis of the $J/Ï\toÏ^0 Î³^\ast$ transition form factor with $I ¨ $ - $I ¨ $ mixing effects

Improved Standard-Model predictions for $I^\cdot^{(')} \to ℓ^{+} ℓ^{-}$

Reconciling hadronic and partonic analyticity in $b \to s ℓℓ$ transitions

Decoding the structure near the $I ¨ ^{+} I ¨ ^{-}$ mass threshold in $I ¨ (3686) \to J / I ¨ I ¨ ^{+} I ¨ ^{-}$ decays

Dispersive Analysis of $D$ - and $B$ -Meson Form Factors with Chiral and Heavy-Quark Constraints