Particle Physics

Salvatore Pace discusses the order of anomalies in global symmetries: the number of identical copies needed before their diagonal symmetry becomes anomaly-free. Familiar lattice examples often have finite order, whereas perturbative continuum anomalies have infinite order. The seminar examines Onsager symmetry as a lattice counterpart of chiral symmetry for a massless Dirac fermion in one spatial dimension. Its anomaly has order two, but imposing CPT symmetry on the lattice changes it to infinite order, bringing the lattice description closer to the continuum. The work was carried out with Elijah Lew-Smith and Shu-Heng Shao and is reported in arXiv:2606.12510. Attendance is at the IAS Bloomberg Lecture Hall; the organizer also offers Zoom access by request through the contact listed on the event page.

Tanmay Vachaspati, joined by Maulik Parikh, explores the limits of knowledge in cosmology and particle physics. The discussion moves from large-scale cosmic structure, the cosmic microwave background and black holes to the Higgs particle, symmetry breaking and magnetic monopoles. These established research landscapes frame questions about what remains unknown and whether some questions could be fundamentally unknowable. This is part of the Beyond Center’s Thinking Beyond series on major questions in science. Speakers: Tanmay Vachaspati and Maulik Parikh, Arizona State University. Organized by the Beyond Center for Fundamental Concepts in Science. Monday 28 September 2026, 18:00 America/Phoenix (Arizona, UTC−07:00). Online via Zoom. Use Register Here on the official event page to complete the event-specific Zoom registration; registration is required. The registration page confirms the date and time.

The Institute for Advanced Study's School of Natural Sciences convenes mathematicians and physicists working on Liouville theory for a three-day workshop spanning its spacelike, timelike and related formulations. Andreas Blommaert and Beatrix Muehlmann organize the programme at Rubenstein Commons, and the official event page states that drop-in attendance is welcome.

Tomas Sykora examines topological physics that perturbation theory cannot capture. Complex field configurations in path integrals include solitons, monopoles, domain walls, cosmic strings, sphalerons, baryon junctions and instantons; non-perturbative effects are central to confinement and hadron masses and spins. Starting with tunnelling in a double-well potential and imaginary time, the talk follows instantons into QCD, covering the theta vacuum, strong CP and axions, chiral symmetry breaking, topology and resurgence. It also considers whether a gluonic Y-shaped baryon junction carries baryon number instead of the valence quarks. The experimental discussion reviews instanton searches at HERA and the LHC, junction searches at RHIC, and prospective Electron-Ion Collider tests. No confirmed signal is claimed. Speaker: Tomas Sykora, Faculty of Mathematics and Physics, Charles University. Organized by Jiří Hejbal and Roman Lysák at FZU. Thursday 15 October 2026, 10:00–11:00 Europe/Prague (CEST). Attend at Dvořák Hall, FZU, Pod Vodárenskou věží 1, Prague, Czechia, or use the public Zoom link on the organizer’s event page.

Develop data formats and compression methods for CMS real-time event reconstruction at rates up to 750 kHz. The role combines accelerator-friendly data structures, CPU/GPU performance studies, evaluation of information loss and AI-assisted compression while preserving useful physics information. This on-site appointment lasts 24 months, potentially extending to 36, with a target start of 1 January 2027. Applications close on 25 September 2026 at 23:59 Geneva time. Applicants need a relevant master’s with two to six years of subsequent experience, or a PhD with at most three years, and must not previously have held a CERN fellow or graduate contract. Apply using the employer’s linked form with a CV and relevant diploma.

Join the ATLAS Detector Safety System team to commission and upgrade safety systems and infrastructure for Run 4. Tasks include subsystem tests, safety matrices, cabling, environmental monitoring and coordination with detector specialists, with team supervision. This on-site appointment lasts 24 months, with a possible extension to 36 months; the target start is 1 November 2026. Apply by 29 September 2026 at 23:59 Geneva time. Applicants need a relevant master’s with two to six years of subsequent experience, or a PhD with at most three years, and no previous CERN fellow or graduate contract. CERN member/associate-state nationality rules apply; the advert currently excludes Pakistani, Lithuanian, Latvian, Cypriot, Croatian and Turkish nationals under membership ceilings.

RIKEN is recruiting one indefinite-term Research Scientist or Senior Research Scientist for its High-Energy QCD Theory Research Team. Research spans lattice and perturbative QCD, the dynamical properties of strongly interacting matter, and connections to experimental data. The scientist will help establish the team and develop collaborations in Japan. Applicants need a relevant doctorate or equivalent research background and approximately seven years of postdoctoral experience. The position is based at Wako Campus, with an anticipated start after 1 February 2027. Applications must reach RIKEN by 30 September 2026; the official page specifies document uploads and applicant follow-up requirements.

CERN's ATLAS Group is recruiting an applied physicist to lead electronics integration for new resistive-plate-chamber detectors in the upgraded ATLAS muon spectrometer. The role covers front-end and low-voltage board validation, detector quality assurance, chamber integration, installation coordination and commissioning in the ATLAS cavern. It is a 54-month, fully on-site appointment in Geneva with an ideal start date of 1 January 2027. Applications close on 4 October 2026 at 23:59 Geneva time.

Supports fundamental physics through atomic, molecular and optical science; nuclear and particle physics; gravitation; plasma physics; living systems; quantum information; instrumentation and related programmes. Proposals are accepted at any time, with programme-specific target dates for review. Funding levels and duration vary; the solicitation does not promise a fixed individual award. Investigators should contact the relevant programme about overlapping proposals or existing Physics awards.

MIT’s Center for Theoretical Physics, a Leinweber Institute, seeks postdoctoral fellows starting September 1, 2027. The broad search covers quantum field theory, gravity, strings, cosmology, particle and nuclear theory, strong interactions and quantum information, including connections across these fields. Independent research directions are welcome; close matching to a faculty programme is not required. Candidates must first be nominated by a faculty member or equivalent senior industry researcher by October 9, 2026 at 11:59 p.m. US Eastern Time. Nominees then apply through AcademicJobsOnline. Complete applications and letters are due for full consideration by November 2, 2026 at 11:59 p.m. US Eastern Time.

Develop data formats and compression methods for CMS real-time event reconstruction at rates up to 750 kHz. The role combines accelerator-friendly data structures, CPU/GPU performance studies, evaluation of information loss and AI-assisted compression while preserving useful physics information. This on-site appointment lasts 24 months, potentially extending to 36, with a target start of 1 January 2027. Applications close on 25 September 2026 at 23:59 Geneva time. Applicants need a relevant master’s with two to six years of subsequent experience, or a PhD with at most three years, and must not previously have held a CERN fellow or graduate contract. Apply using the employer’s linked form with a CV and relevant diploma.

Join the ATLAS Detector Safety System team to commission and upgrade safety systems and infrastructure for Run 4. Tasks include subsystem tests, safety matrices, cabling, environmental monitoring and coordination with detector specialists, with team supervision. This on-site appointment lasts 24 months, with a possible extension to 36 months; the target start is 1 November 2026. Apply by 29 September 2026 at 23:59 Geneva time. Applicants need a relevant master’s with two to six years of subsequent experience, or a PhD with at most three years, and no previous CERN fellow or graduate contract. CERN member/associate-state nationality rules apply; the advert currently excludes Pakistani, Lithuanian, Latvian, Cypriot, Croatian and Turkish nationals under membership ceilings.