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
    • Welcome and general talks

      Welcome and introductory talks to the Workshop

      • 1
        Welcome and introductory remarks
      • 2
        FCC-ee: project status
        Speaker: Guy Wilkinson (University of Oxford (GB))
      • 3
        FCC physics beyond flavour: developments and synergies
        Speaker: Michele Selvaggi (CERN)
      • 4
        Theory keynote
        Speaker: Clara Murgui Galvez (CERN)
    • 10:30
      Coffee break
    • WG3: charged-current processes
      • 5
        CCP session Intro
        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))
      • 6
        LQCD on b->c
        Speaker: Matteo Di Carlo (CERN)
      • 7
        Sum rules
        Speakers: Iguro Syuhei (Karlsruhe Institute of Technology), Syuhei Iguro
    • 12:30
      Lunch
    • WG3: charged-current processes
      • 8
        Hadron species tagger at FCC-ee
        Speaker: Xunwu Zuo (EPFL - Ecole Polytechnique Federale Lausanne (CH))
      • 9
        Learning from all particles - holistic approach at cosmic and collider frontiers
        Speaker: Manqi Ruan (Chinese Academy of Sciences (CN))
      • 10
        Taggers at BES III: from objects to topologies
        Speaker: Yunxuan Song (EPFL - Ecole Polytechnique Federale Lausanne (CH))
    • 15:30
      Coffee Break
    • Beyond the WGs: session 1
      • 11
        FCC calorimetry and PID: status of s/w implementation
        Speaker: Sanghyun Ko (CERN)
      • 12
        Lattice and flavour physics
        Speaker: Nazario Tantalo (Universita e INFN Roma Tor Vergata (IT))
      • 13
        From Belle II to FCC-ee
        Speaker: James Libby
    • Workshop reception

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

    • WG2: CP violation
      • 14
        Intro to WG2
        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)
      • 15
        $B$ mesogenesis and impact on $CP$ asymmetries
        Speaker: Marta Burgos Marcos (Nikhef National institute for subatomic physics (NL))
      • 16
        Prospects for CKM angle $\gamma$
        Speaker: Sneha Sirirshkumar Malde (University of Oxford (GB))
      • 17
        CPV in $B^+ \to \pi^+ \pi^0$
        Speakers: Yosef Nir, Zoltan Ligeti (Lawrence Berkeley National Lab. (US))
    • 10:40
      Coffee break
    • WG2: CP violation
      • 18
        Flavour Tagging with TFlaT with IDEA
        Speaker: Leandra Moeser (Technische Universitaet Dortmund (DE))
      • 19
        CPV in $B_{(s)} \to \phi K$
        Speaker: Keri Vos (Nikhef National institute for subatomic physics (NL))
      • 20
        Time-dependent CPV studies
        Speaker: Charlie Wild (University of Oxford (GB))
    • 12:40
      Lunch
    • WG1: rare decays
      • 21
        Theory overview
      • 22
        $B\to K^* \tau \tau$ with full simulation
        Speaker: Armin Ilg (University of Zurich)
      • 23
        Rare decays of polarized $\Lambda_b$ baryons
        Speaker: Michal Kreps (University of Warwick (GB))
    • 15:30
      Coffee break
    • WG1: rare decays
      • 24
        Rare B decays with invisible final states
        Speaker: Ella Wood (University of Cambridge (GB))
      • 25
        New PID flavour tools and case studies
        Speaker: Anja Beck (Massachusetts Inst. of Technology (US))
      • 26
        $B_s \to \tau \tau$ studies
        Speaker: Tobias Alexandre Monnard (EPFL - Ecole Polytechnique Federale Lausanne (CH))
    • WG4: charm
      • 27
        Introduction
      • 28
        CPV in $D^{0}$ Decays
        Speaker: Willy Herbert Karl Weber (University Clermont Auvergne & University of Dortmund)
      • 29
        One Sum To Rule Them All: A Second Order Master Rate Sum Rule for Charm Decays
        Speaker: Guglielmo Papiri (Cornell University)
      • 30
        Time-dependent CPV opportunities
        Speaker: Nathan Philip Jurik (CERN)
    • 10:30
      Coffee break
    • WG4: charm
      • 31
        $D^{0}\rightarrow\pi^{0}\nu\nu$ at BESIII
        Speaker: Yunxuan Song (EPFL - Ecole Polytechnique Federale Lausanne (CH))
      • 32
        Baryon Number Violation in charm decays with missing energy
        Speaker: Ali Mohamed (Siegen university)
    • Beyond the WG: session jet Flavour Tagging
      • 33
        Flavor-Tagging at FCC-ee
        Speaker: Gino Daniels (Purdue University (US))
      • 34
        rom ATLAS GN3 to FCC Flavor Tagging: Plans and Prospects
        Speaker: Alexander Froch (Universite de Geneve (CH))
    • 12:40
      Lunch
    • WG5: tau and selected EW
      • 35
        Introduction by conveners
        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))
      • 36
        Experimental summary of tau reconstruction
        Speakers: Laurits Tani (National Institute of Chemical Physics and Biophysics (EE)), Michel Hernandez Villanueva (Brookhaven National Laboratory (US))
      • 37
        Tau g-2 at FCC-ee
        Speakers: Gabriele Levati, Gabriele Levati (Università degli studi di Padova and INFN Padova)
      • 14:50
        Discussion
      • 38
        Theory overview: LFV decays at FCC-ee
        Speakers: Enrico Scantamburlo (Universite de Geneve (CH)), enrico scantamburlo
      • 39
        Experimental studies on LFV decays
        Speaker: Alberto Lusiani (Scuola Normale Superiore and INFN, sezione di Pisa)
    • 15:35
      Coffee Break
    • WG5: tau and selected EW
      • 40
        Experimental studies on tau lifetime and mass
        Speaker: Miguel Niño (National University of Colombia (UNAL) (CO))
      • 41
        Experimental studies on Tau Polarization
        Speaker: Olmo Arquero Peinazo (CIEMAT - Centro de Investigaciones Energéticas Medioambientales y Tec. (ES))
      • 42
        CPV in tau decays with KS
        Speaker: Guglielmo Papiri (Cornell University)
      • 17:00
        Discussion
      • 43
        Monte Carlo generators
      • 44
        Tauonium
        Speaker: David d'Enterria (CERN)
    • Dinner: Intention to organise dinner in a near-by pizzeria or similar

      Dinner in Meyrin

    • Beyond the WGs: session 2
      • 45
        Strange physics at FCC-ee: status update
        Speaker: Mireya Pando
      • 46
        Full Event Interpretation for bb events at FCC-ee
        Speakers: Elena Graverini (University of Pisa (IT) and EPFL - Ecole Polytechnique Federale Lausanne (CH)), Rafael Silva Coutinho (CBPF - Brazilian Center for Physics Research (BR))
      • 47
        Role of flavour in BSM
        Speaker: Sophie Alice Renner (University of Glasgow (GB))
    • 10:30
      Coffee
    • Close-out session
      • 48
        Next steps and future plans from the WGs
        • a) WG1
        • b) WG2
        • c) WG3
        • d) WG4
        • e) WG5
      • 49
        Concluding words