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Flavor Physics with b-Baryons and B_c Mesons: Opportunities for Discoveries

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02.430 (Mainz Institute for Theoretical Physics, Johannes Gutenberg University)

02.430

Mainz Institute for Theoretical Physics, Johannes Gutenberg University

Staudingerweg 9 / 2nd floor, 55128 Mainz
Description

The registration will close on 16 February 2026, 11:59 P.M. CET.

 

 

Explaining the flavor structure of the Standard Model, which involves ad hoc hierarchical couplings, remains both a challenge and a portal for tremendous opportunities. Due to its large mass and long lifetime, the beauty quark plays a central role in New Physics searches, with anomalies having appeared in both charged and neutral b-quark transitions.

 

While the B-meson sector has been deeply investigated, the LHC offers unique access to all species of b-hadrons, including Λb, Ξb,  Ωb and Bc. The different spin-structures and/or underlying form factor calculations are complementary to the B-meson modes. Significant efforts are underway to ensure that the triggerless online DAQ at LHCb during Run 3, as well as the large parked datasets from ATLAS and CMS can be leveraged to the maximum, to measure branching fractions, angular observables, and lepton flavor universality ratios involving these rarer b-hadrons.  

 

Advances are also being made in calculating the hadronic matrix elements that are needed to connect the decay observables to the underlying short-distance physics. There has also been substantial progress with lattice QCD, dispersive methods, LCSR, HQET, SCET, and QCD factorization calculations of the hadronic matrix elements for b-baryon and Bc decays, alongside phenomenological studies exploring novel observables and their sensitivity to new-physics scenarios.

 

The workshop, near the end of LHC Run 3, is well-timed to leverage the availability of new results on these heavier b-hadron decays and will bring together theorists and experimentalists to discuss their interpretations.

Contact @ MITP: Olly Zeeh-Sourli
  • Tuesday 26 May
    • 1
      Check-in
    • Welcome and introduction: MITP welcome
    • Welcome and introduction
      Conveners: Anna Lupato, Biplab Dey (Eotvos U.), Stefan Meinel (University of Arizona)
    • Theory
      • 2
        New-physics models and constraints from Λb and Bc decays
        Speaker: Monika Blanke (Institut für Theoretische Teilchenphysik)
    • 11:15
      Coffee Break
    • Experiments
      • 3
        Status and Prospects of CKM Matrix Elements Measured with Baryons and the Bc​ Mesons
        Speaker: Marcello Rotondo (INFN Frascati National Laboratories)
    • 12:05
      Lunch & Discussion
    • LQCD
      • 4
        Baryon semileptonic decays using lattice QCD
        Speaker: Simone Bacchio (University of Cyprus Graphic)
    • 14:15
      Coffee Break
    • LQCD
      • 5
        Lattice QCD Determinations of Baryon LCDAs
        Speaker: Wei Wang (INPAC)
  • Wednesday 27 May
    • Experiments
      • 6
        CMS measurements with rare and semileptonic decays of b baryons and Bc meson
        Speaker: Riccardo Manzoni (ETH)
      • 7
        LHCb results regarding Bc physics
        Speaker: Guy Wormser (LAL)
    • 10:50
      Coffee Break
    • Theory
      • 8
        EFT studies with semileptonic b-baryon decays
        Speaker: Alakabha Datta (Missisipi University)
    • 11:50
      Lunch
    • Experiments
      • 9
        b-hadron fragmentation fractions
        Speaker: Marina Artuso (Syracuse University)
      • 10
        Excited Charmed baryon studies at BESIII
        Speaker: Giulio Mezzadri
    • 14:50
      Coffee Break
    • Experiments
      • 11
        Opportunities with Lc* decays al LHCb
        Speaker: Anna Lupato
    • Social Dinner
  • Thursday 28 May
    • Theory
      • 12
        Form-factor parametrizations and dispersive bounds
        Speaker: Nico Gubernari (University of Bonn)
    • LQCD
      • 13
        Heavy-baryon decay form factors from lattice QCD
        Speaker: Stefan Meinel (University of Arizona)
    • 10:50
      Coffee Break
    • Theory
      • 14
        Non-factorizable contributions in rare Lambda_b decays
        Speaker: Thorsten Feldmann (Siegen University)
    • 11:50
      Lunch & Discussion
    • Experiments
      • 15
        Electroweak penguin b-baryon decay prospects at LHCb
        Speaker: Janina Nicolini (CERN)
      • 16
        Xib/Omegab and prospects
        Speaker: Lucas Calefice
    • 14:50
      Coffee Break
    • Experiments
      • 17
        Lb->pKll angular analyses
        Speaker: Biplab Dey (Eotvos U.)
  • Friday 29 May
    • Experiments
      • 18
        LHCb b -> s tau tau 3 prong
        Speaker: Lesya Shchutska (EPFL)
      • 19
        Charm spectroscopy at Belle II
        Speaker: Bianca Scavino (Uppsala University)
    • 10:50
      Coffee Break
    • Experiments
      • 20
        Prospects and results using Hammer in LHCb
        Speaker: Biljana Mitreska (The University of Manchester)
    • Theory
      • 21
        CP violation in Λ_b^0 decays
        Speaker: Chia-Wei Liu
    • 22
      Closing Remarks and Outlook
      Speakers: Anna Lupato, Biplab Dey (Eotvos U.), Stefan Meinel (University of Arizona)