CKM Workshop

CKM Workshop
Name	CKM Workshop
Status	Active
Genre	Particle physics conference
First	2002
Frequency	Biennial
Location	Varies (Europe, Asia, Americas)
Discipline	High-energy physics
Organizer	International collaborations

CKM Workshop The CKM Workshop is an international conference series focused on flavor physics, weak interactions, and the elements of the Cabibbo–Kobayashi–Maskawa matrix. It brings together researchers from experimental collaborations, theoretical groups, detector projects, and funding agencies to address precision determinations of quark mixing, CP violation, and rare decays.

Overview

The Workshop emphasizes interplay among experiments such as Large Hadron Collider, Belle II, LHCb, BaBar, and CLEO with theory inputs from groups connected to Fermilab, CERN, SLAC National Accelerator Laboratory, KEK, and Brookhaven National Laboratory. Participants include members of collaborations like ATLAS, CMS, SuperKEKB, PANDA (experiment), and institutions such as Imperial College London, University of Cambridge, Massachusetts Institute of Technology, University of Oxford, and University of Tokyo. The program typically features plenary talks, working groups associated with lattice calculations from Riken, effective-field theory developments related to Institute for Advanced Study, and summaries from laboratory directors representing Deutsches Elektronen-Synchrotron, Centre National de la Recherche Scientifique, and INFN. Funding and policy discussions involve agencies like European Research Council, National Science Foundation (United States), and Japan Society for the Promotion of Science.

History and editions

The series began in the early 2000s with initial meetings patterned after workshops at CERN and SLAC National Accelerator Laboratory and has alternated venues across continents including locations at Lausanne, Geneva, Barcelona, Vancouver, Beijing, Bangalore, Prague, Madrid, Rome, and Valencia. Early editions built on results from experiments at KEKB, PEP-II, and Tevatron and engaged theorists associated with Princeton University, Harvard University, Stanford University, University of California, Berkeley, University of Michigan, and University of Illinois Urbana-Champaign. Subsequent meetings integrated advances from Belle, CLEO-c, DØ (detector), CDF (detector), and lattice groups at University of Edinburgh, Trinity College Dublin, and Humboldt University of Berlin. Special sessions devoted to global fits involved teams from CKMfitter Group, UTfit Collaboration, Max Planck Institute for Physics, and Niels Bohr Institute.

Scientific topics and goals

Scientific themes span precision determinations of matrix elements from lattice QCD collaborations at Brookhaven National Laboratory, studies of hadronic uncertainties from California Institute of Technology, and constraints on physics beyond the Standard Model from flavor observables probed by LHCb and Belle II. The agenda routinely addresses CP violation in kaon experiments such as NA62 (experiment) and KOTO, rare B decays measured by BaBar and Belle II, and semileptonic transitions relevant to determinations of |V_cb| and |V_ub| involving inputs from HPQCD Collaboration, Fermilab Lattice and MILC Collaborations, RIKEN BNL Research Center, and European Organization for Nuclear Research. Other topics include effective-theory tools developed at MIT, global fits of the unitarity triangle from University of Rome La Sapienza, and implications for models like minimal flavor violation discussed by researchers at University of Geneva and University of Hamburg.

Organizers and governance

Organization typically involves steering committees drawn from representatives of experimental collaborations and theoretical consortia including members from CERN, Fermilab, KEK, INFN, CNRS, DESY, and national laboratories such as Lawrence Berkeley National Laboratory and Argonne National Laboratory. Program chairs have included faculty affiliated with University of California, San Diego, University of Maryland, University of Wisconsin–Madison, York University, and University of British Columbia. Logistics and sponsorship have been coordinated with professional societies like European Physical Society and American Physical Society, and proceedings edited by editorial teams at publishing houses working with Institute of Physics and Springer Science+Business Media.

Notable results and impact

The Workshop has catalyzed coordinated strategies for resolving tensions in determinations of |V_cb| and |V_ub| highlighted alongside results from LHCb, Belle II, BaBar, and CLEO-c. It fostered collaborations between lattice groups such as HPQCD Collaboration, Fermilab Lattice, and ETM Collaboration leading to refined decay-constant inputs used in global fits by CKMfitter Group and UTfit Collaboration. Sessions influenced experimental proposals at SuperKEKB and upgrade plans for LHCb Upgrade and motivated targeted measurements at NA62 (experiment) and rare-kaon initiatives at J-PARC. The meeting provided forums where anomalies related to lepton-flavor universality involving R_K and R_D ratios were scrutinized by theorists at University of Bern, Ecole Polytechnique, and Institut de Physique Théorique.

Meetings and proceedings

Proceedings have been published by conferences in collections overseen by editors from CERN Library, Springer, and proceedings series associated with Proceedings of Science. Each edition issues technical reports and white papers circulated to laboratories including Fermilab, CERN, KEK, and RIKEN, and to funding bodies like European Commission and Department of Energy (United States). Workshops are often followed by focused topical meetings at institutes such as Perimeter Institute, Kavli Institute for Theoretical Physics, Institute for Nuclear Theory, and Aspen Center for Physics to pursue work in lattice QCD, effective-field theory, and global-flavor fits.

Category:Particle physics conferences