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Breakthrough Tracker record

BASE-STEP transported 92 trapped antiprotons by road without particle loss

The BASE-STEP collaboration transported 92 trapped antiprotons 7.5 kilometres across CERN in 24 minutes without losing particles or measurably degrading the trap vacuum. Monitoring for 33 days set a 7.27-year storage-lifetime lower bound at 68% confidence.

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Stable ID
physics-antiproton-road-transport-base-step-2026
Revision
physics-antiproton-road-transport-base-step-2026.v1
Field
Physics · Antimatter physics and precision measurement
Evidence
Tier 1 · Peer reviewed: Yes
Record state
Current · Peer-reviewed result
Last checked

AI role

No substantive AI role was disclosed in the inspected article or collaboration report.

Record details

Problem or result
Portable confinement and transport of trapped antiprotons
Authors
M. Leonhardt, J. Morgner, F. Abbass and the BASE-STEP collaboration
Institutions
CERN BASE-STEP; Heinrich Heine University Düsseldorf; CERN; Mainz; GSI; MPIK; RIKEN; University of Tokyo; Leibniz University Hannover
Result date
Transport March 24; published September 16, 2026

Why it matters

Portable antiproton traps can move precision experiments away from accelerator noise; the collaboration estimates that off-site CPT comparisons could eventually improve by at least two orders of magnitude.

Limits

This was a proof-of-feasibility trip within CERN, not intercity delivery or a new CPT measurement. The demonstrated autonomous interval was 2.72 hours, and the projected precision gain has not yet been achieved.

Sources

  1. Primary: Nature, lossless road transport of trapped antiprotons
  2. Collaboration: CERN BASE-STEP experiment report
  3. Specialist context: Nature News & Views on portable antiprotons

Correction and revision history

  1. 2026-10-02 — Added after primary-source, scope, status, AI-role and limitation review.

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