Cecilia Jarlskog

Cecilia Jarlskog is a Swedish theoretical physicist known for foundational work in particle physics, particularly the formulation of the Jarlskog invariant which quantifies CP violation in the Standard Model of particle physics. Her career spans research and teaching at major institutions including Lund University, CERN, and collaborations across Europe and the United States. Jarlskog has influenced studies of mixing matrices, symmetries, and flavor physics, linking theoretical formalism with experimental programs at facilities such as SLAC National Accelerator Laboratory and Fermilab.

Early life and education

Born in Lund, Sweden, she studied physics at Lund University where she completed undergraduate and doctoral studies under supervision associated with the physics department and influences from scholars visiting from Stockholm University, University of Gothenburg, and Uppsala University. During her formative years she interacted with researchers connected to Niels Bohr Institute, CERN, and the then-active Scandinavian networks involving Royal Institute of Technology academics. Her doctoral work engaged topics related to particle symmetries discussed at conferences in Geneva, Paris, and Prague.

Academic career and positions

Jarlskog held faculty and research appointments at Lund University and undertook visiting positions at CERN, the University of Cambridge, and the University of Oxford. She collaborated with theorists from Princeton University, Harvard University, and Imperial College London and worked with experimental groups at DESY and SLAC National Accelerator Laboratory. Her professional affiliations have included connections to Royal Institute of Technology, the International Centre for Theoretical Physics, and the Nordic Institute for Theoretical Physics (NORDITA). She has participated in committees within European Organization for Nuclear Research structures and served as an examiner for theses at University of Bergen and other European universities.

Research contributions

Jarlskog introduced a rephasing-invariant measure of CP violation in the quark sector, now widely cited in analyses related to the Cabibbo–Kobayashi–Maskawa matrix, the CKM matrix, and studies following the Kobayashi–Maskawa theory. Her invariant provided a basis-independent criterion used in investigations at Belle Experiment, BaBar Experiment, Large Hadron Collider, and analyses of results from Tevatron. She explored relations between flavor mixing and mass matrices that connect to work by Nicola Cabibbo, Makoto Kobayashi, and Toshihide Maskawa, and her formalism has been applied in neutrino physics contexts involving the Pontecorvo–Maki–Nakagawa–Sakata matrix and experiments such as Super-Kamiokande and SNO. Jarlskog examined symmetry properties that relate to concepts used by Murray Gell-Mann and Sheldon Glashow and her results inform model-building efforts including those by groups at University of California, Berkeley, Massachusetts Institute of Technology, and Stanford University. Her work also links to studies of CP violation in baryogenesis inspired by analyses from Andrei Sakharov and later theoretical developments by researchers at University of Chicago and Perimeter Institute.

Awards and honors

Jarlskog's contributions have been recognized by physics societies and institutions across Scandinavia and Europe, including prizes and lectureships associated with Gothenburg Physics Prize, honors from Lund University, invitations to speak at the Solvay Conferences, and participation in symposia organized by European Physical Society. She has been awarded visiting professorships connected to Royal Institute of Technology and fellowships supporting work at CERN and Nordita. Her papers are frequently cited in review articles appearing in journals linked to American Physical Society, Institute of Physics, and Elsevier publishing venues.

Selected publications

- C. Jarlskog, "Commutator of the Mass Matrices in the Standard Electroweak Model and a Measure of Maximal CP Violation", Physical Review Letters — foundational work referenced alongside publications by Makoto Kobayashi and Toshihide Maskawa and discussed in reviews by G. C. Branco and Ivo de Medeiros Varzielas. - C. Jarlskog, papers on rephasing invariants and mass matrix relations cited in proceedings of conferences at CERN and DESY and in compilations edited by John Ellis and Maurice Jacob. - Articles and reviews appearing in journals of the American Physical Society and Institute of Physics addressing implications for Belle Experiment, BaBar Experiment, and neutrino experiments such as Super-Kamiokande and SNO.

Category:Swedish physicists Category:Theoretical physicists Category:Women physicists Category:Lund University faculty