Flavours at FCC Workshop - Part II

Europe/Zurich
500/1-001 - Main Auditorium (CERN)

500/1-001 - Main Auditorium

CERN

400
Show room on map
Gino Isidori (University of Zurich (CH)), Guy Wilkinson (University of Oxford (GB)), Stephane Monteil (Université Clermont Auvergne (FR)), Zoltan Ligeti (Lawrence Berkeley National Lab. (US))
Description

Physics at the Flavoured Circular Collider: preparing for heavy quark and lepton studies in the post HL-LHC/Belle II era

Second in-person event.  Details to be announced in coming weeks.  Block outline of timetable is reliable, but exact order of WGs might change.  We will also schedule a hands-on tutorial in FCC s/w for the afternoon of the day preceding the workshop.

Experimentalists and theorists from the world-wide particle physics community are invited to participate in an extended workshop, beginning autumn 2025 and scheduled to continue until summer 2027 to deepen our understanding of the potential of the FCC-ee for heavy-flavour physics in the quark and lepton sector.  This will build on the studies performed for the Conceptual Design Report and Feasibility Study Report and seek to set the agenda, and prepare the tools, for physics in the post HL-LHC and Belle II era.

The workshop will be focused on the physics opportunities and challenges at FCC-ee, with the following goals:

  • Obtain realistic estimates for precision on key flavour benchmarks;
  • Identify and develop strategies for potentially limiting systematics from experiment and theory; 
  • Work closely with the physics performance and detector-concept groups to investigate the requirements on and impact of various detector designs;
  • Formulate new measurement strategies and identify new decay modes of interest;
  • Understand the complementarities with the HL-LHC;
  • Explore the interplay with the Higgs, electroweak, and possible hidden sectors;
  • Assess whether there exists a physics case for extending the TeraZ programme beyond $6 \times 10^{12}$ decays.

As well as pure flavour studies, the workshop will address electroweak measurements at the Z pole involving fully reconstructed heavy-flavour final states, and will also consider the rich possibilities that exist in hadron spectroscopy with the TeraZ dataset. In addition, consideration will be given to how the flavour programme can be extended at FCC-hh, and what requirements this will place on detectors.

The output of the workshop will be communicated in a report that will be a resource for the TDRs of the collaborations that will form after project approval, motivate future theoretical work, and inform the eventual operational plan of the FCC-ee.

In order to join the workshop discussions, please sign up on the mailing lists and mattermost channels that can be found under Subscription to mailing lists in the left-hand menu bar.    (This information is only visible to workshop registrants.)

We gratefully acknowledge the support of Brookhaven National Laboratory and CERN in funding the first meeting.

           

Registration
Registration
Participants
    • 09:00 10:30
      Welcome and general talks

      Welcome and introductory talks to the Workshop

      • 09:00
        Welcome and introductory remarks 10m
      • 09:10
        FCC-ee: project status 25m
        Speaker: Guy Wilkinson (University of Oxford (GB))
      • 09:35
        FCC physics beyond flavour: developments and synergies 25m
        Speaker: Michele Selvaggi (CERN)
      • 10:00
        Theory keynote 30m
        Speaker: Clara Murgui Galvez (CERN)
    • 10:30 11:00
      Coffee break 30m
    • 11:00 12:30
      WG3: charged-current processes
      • 11:00
        CCP session Intro 15m
        Speakers: Andreas Juttner (CERN), Christina Agapopoulou (Université Paris-Saclay (FR)), Dean Robinson (Lawrence Berkeley National Laboratory (LBL)), Markus Tobias Prim (University of Bonn (DE)), Raynette Van Tonder (Karlsruhe Institute of Technology), Xunwu Zuo (EPFL - Ecole Polytechnique Federale Lausanne (CH))
      • 11:15
        LQCD on b->c 20m
        Speaker: Matteo Di Carlo (CERN)
      • 11:40
        Sum rules 20m
        Speakers: Iguro Syuhei (Karlsruhe Institute of Technology), Syuhei Iguro
    • 12:30 14:00
      Lunch 1h 30m
    • 14:00 15:30
      WG3: charged-current processes
      • 14:00
        Hadron species tagger at FCC-ee 25m
        Speaker: Xunwu Zuo (EPFL - Ecole Polytechnique Federale Lausanne (CH))
      • 14:30
        Learning from all particles - holistic approach at cosmic and collider frontiers 25m
        Speaker: Manqi Ruan (Chinese Academy of Sciences (CN))
      • 15:00
        Taggers at BES III: from objects to topologies 25m
        Speaker: Yunxuan Song (EPFL - Ecole Polytechnique Federale Lausanne (CH))
    • 15:30 16:00
      Coffee Break 30m
    • 16:00 17:30
      Beyond the WGs: session 1
      • 16:00
        FCC calorimetry and PID: status of s/w implementation 25m
        Speaker: Sanghyun Ko (CERN)
      • 16:25
        Lattice and flavour physics 30m
        Speaker: Nazario Tantalo (Universita e INFN Roma Tor Vergata (IT))
      • 16:55
        From Belle II to FCC-ee 30m
        Speaker: James Libby
    • 18:30 20:30
      Workshop reception

      In extension area of R1 (i.e. close to, but not in, 'Glass Box')

    • 09:00 10:40
      WG2: CP violation
      • 09:00
        Intro to WG2 10m
        Speakers: Alberto Bragagnolo (CERN), Jure Zupan (University of Cincinnati), Laurent Dufour (EPFL - Ecole Polytechnique Federale Lausanne (CH)), Matthew William Kenzie (University of Cambridge (GB)), Michele Veronesi (IPMU), Stefan Schacht (Durham University)
      • 09:10
        $B$ mesogenesis and impact on $CP$ asymmetries 30m
        Speaker: Marta Burgos Marcos (Nikhef National institute for subatomic physics (NL))
      • 09:40
        Prospects for CKM angle $\gamma$ 30m
        Speaker: Sneha Sirirshkumar Malde (University of Oxford (GB))
      • 10:10
        CPV in $B^+ \to \pi^+ \pi^0$ 30m
        Speakers: Yosef Nir, Zoltan Ligeti (Lawrence Berkeley National Lab. (US))
    • 10:40 11:10
      Coffee break 30m
    • 11:10 12:40
      WG2: CP violation
      • 11:10
        Flavour Tagging with TFlaT with IDEA 30m
        Speaker: Leandra Moeser (Technische Universitaet Dortmund (DE))
      • 11:40
        CPV in $B_{(s)} \to \phi K$ 30m
        Speaker: Keri Vos (Nikhef National institute for subatomic physics (NL))
      • 12:10
        Time-dependent CPV studies 30m
        Speaker: Charlie Wild (University of Oxford (GB))
    • 12:40 14:00
      Lunch 1h 20m
    • 14:00 15:30
      WG1: rare decays
      • 14:00
        Theory overview 30m
      • 14:30
        $B\to K^* \tau \tau$ with full simulation 30m
        Speaker: Armin Ilg (University of Zurich)
      • 15:00
        Rare decays of polarized $\Lambda_b$ baryons 30m
        Speaker: Michal Kreps (University of Warwick (GB))
    • 15:30 16:00
      Coffee break 30m
    • 16:00 18:30
      WG1: rare decays
      • 17:00
        Rare B decays with invisible final states 30m
        Speaker: Ella Wood (University of Cambridge (GB))
      • 17:30
        New PID flavour tools and case studies 30m
        Speaker: Anja Beck (Massachusetts Inst. of Technology (US))
      • 18:00
        $B_s \to \tau \tau$ studies 30m
        Speaker: Tobias Alexandre Monnard (EPFL - Ecole Polytechnique Federale Lausanne (CH))
    • 09:00 10:30
      WG4: charm
      • 09:00
        Introduction 10m
      • 09:10
        CPV in $D^{0}$ Decays 25m
        Speaker: Willy Herbert Karl Weber (University Clermont Auvergne & University of Dortmund)
      • 09:35
        One Sum To Rule Them All: A Second Order Master Rate Sum Rule for Charm Decays 30m
        Speaker: Guglielmo Papiri (Cornell University)
      • 10:05
        Time-dependent CPV opportunities 25m
        Speaker: Nathan Philip Jurik (CERN)
    • 10:30 11:00
      Coffee break 30m
    • 11:00 11:50
      WG4: charm
      • 11:00
        $D^{0}\rightarrow\pi^{0}\nu\nu$ at BESIII 25m
        Speaker: Yunxuan Song (EPFL - Ecole Polytechnique Federale Lausanne (CH))
      • 11:25
        Baryon Number Violation in charm decays with missing energy 25m
        Speaker: Ali Mohamed (Siegen university)
    • 11:50 12:40
      Beyond the WG: session jet Flavour Tagging
      • 11:50
        Flavor-Tagging at FCC-ee 25m
        Speaker: Gino Daniels (Purdue University (US))
      • 12:15
        rom ATLAS GN3 to FCC Flavor Tagging: Plans and Prospects 25m
        Speaker: Alexander Froch (Universite de Geneve (CH))
    • 12:40 14:00
      Lunch 1h 20m
    • 14:00 15:35
      WG5: tau and selected EW
      • 14:00
        Introduction by conveners 10m
        Speakers: Aurelien Martens (Université Paris-Saclay (FR)), Emilie Passemar, Emilie Passemar, Emilie Passemar, Maria Cepeda (CIEMAT), Dr Olcyr Sumensari (IJCLab), Romain Madar (Université Clermont Auvergne (FR))
      • 14:10
        Experimental summary of tau reconstruction 20m
        Speakers: Laurits Tani (National Institute of Chemical Physics and Biophysics (EE)), Michel Hernandez Villanueva (Brookhaven National Laboratory (US))
      • 14:30
        Tau g-2 at FCC-ee 20m
        Speakers: Gabriele Levati, Gabriele Levati (Università degli studi di Padova and INFN Padova)
      • 14:50
        Discussion 5m
      • 14:55
        Theory overview: LFV decays at FCC-ee 20m
        Speakers: Enrico Scantamburlo (Universite de Geneve (CH)), enrico scantamburlo
      • 15:15
        Experimental studies on LFV decays 20m
        Speaker: Alberto Lusiani (Scuola Normale Superiore and INFN, sezione di Pisa)
    • 15:35 16:00
      Coffee Break 25m
    • 16:00 18:10
      WG5: tau and selected EW
      • 16:00
        Experimental studies on tau lifetime and mass 20m
        Speaker: Miguel Niño (National University of Colombia (UNAL) (CO))
      • 16:20
        Experimental studies on Tau Polarization 20m
        Speaker: Olmo Arquero Peinazo (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
      • 16:40
        CPV in tau decays with KS 20m
        Speaker: Guglielmo Papiri (Cornell University)
      • 17:00
        Discussion 5m
      • 17:05
        Monte Carlo generators 20m
      • 17:25
        Tauonium 20m
        Speaker: David d'Enterria (CERN)
    • 19:30 22:00
      Dinner: Intention to organise dinner in a near-by pizzeria or similar

      Dinner in Meyrin

    • 09:00 10:30
      Beyond the WGs: session 2
      • 09:00
        Strange physics at FCC-ee: status update 30m
        Speaker: Mireya Pando
      • 09:30
        Full Event Interpretation for bb events at FCC-ee 30m
        Speakers: Elena Graverini (University of Pisa (IT) and EPFL - Ecole Polytechnique Federale Lausanne (CH)), Rafael Silva Coutinho (CBPF - Brazilian Center for Physics Research (BR))
      • 10:00
        Role of flavour in BSM 30m
        Speaker: Sophie Alice Renner (University of Glasgow (GB))
    • 10:30 11:00
      Coffee 30m
    • 11:00 12:30
      Close-out session
      • 11:00
        Next steps and future plans from the WGs 50m
        • WG1 10m
        • WG2 10m
        • WG3 10m
        • WG4 10m
        • WG5 10m
      • 11:50
        Concluding words 30m