FCC Rare Decays Working Group Meeting

Monday 9 Feb 2026, 16:00 → 18:00 Europe/Zurich

Conveners introduction

rareDecays_FCCee_intro.pdf

Contributed talks

1 $B\to K^*\tau\tau$ with full simulation + vertex detector layout and sensor designs

Speakers: Armin Ilg (University of Zurich), Jona Dilg (University of Zurich (CH))

2026-02-09_FCCee-Rare-Decays_JDilg-AIlg_BtoKStarTauTau.pdf

2 Polarized $L_b$ baryons and flavour benchmarks for tracker PID

Speakers: Anja Beck (Massachusetts Inst. of Technology (US)), Eluned Anne Smith (Massachusetts Inst. of Technology (US))

2026_02_09_fcc-rd.pdf

3 Measuring polarized $\Lambda_b\to\Lambda\nu\bar\nu$ observables

Speakers: Mr Shibasis Roy, Wolfgang Altmannshofer (UC Santa Cruz)

FCC_Roy_LBtoLnunu.pdf

4 Feasibility/sensitivity of a sum-of-exclusive analysis of $b\to s\ell\ell$ transitions at FCC-ee

Speakers: Elena Graverini (University of Pisa (IT) and EPFL - Ecole Polytechnique Federale Lausanne (CH)), Felipe Luan Souza De Almeida (University of Barcelona (ES)), Rafael Silva Coutinho (CBPF - Brazilian Center for Physics Research (BR))

Slides.pdf

5 $B_s\to\tau\tau$

Speakers: Tobias Alexandre Monnard (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Xunwu Zuo (EPFL - Ecole Polytechnique Federale Lausanne (CH))

26_02_09_Bs2TauTau.pdf

26_02_09_Bs2TauTau.pptx

6 $B\to\ell\bar\nu$

Speakers: Vasilisa Guliaeva (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Xunwu Zuo (EPFL - Ecole Polytechnique Federale Lausanne (CH))

VG_BcButolepton_FCCRareDecayWG.pdf

7 Measuring the photon polarisation with $\Lambda_b$ decays

Speakers: Marie-Helene Schune (Université Paris-Saclay (FR)), Marzia Bordone (University of Zürich and CERN), Renato Quagliani (CERN)

FCC_EE_PhotonPol_LbLgamma (4).pdf