Shock as CERN antiproton lorry vanishes in staff car park
Truck was used last month to transport 92 antiprotons around CERN The post Shock as CERN antiproton lorry vanishes in staff car park appeared first on Physics World .

Researchers at the CERN particle-physics lab near Geneva were left in shock when a lorry containing a vial of antiprotons vanished from the main CERN car park. The vehicle had been used by the Baryon-Antibaryon Symmetry Experiment (BASE) to transport 92 antiprotons around the CERN site last month. Following their work, the BASE researchers left the lorry in the car park, only to find it missing the following morning.
The antiprotons were contained in a specialized cryogenically-cooled Penning trap, which was composed of gold-plated cylindrical electrode stacks made from oxygen-free copper, surrounded by a superconducting magnet bore. The disappearance of the lorry has left the scientific community baffled, as the antiprotons are a rare and valuable resource used in cutting-edge research.
Initial suspicions pointed towards visiting US researchers from Fermilab, who might have stolen the lorry. However, a review of CCTV footage by CERN scientist Vittoria Vetra has suggested a more unlikely explanation. The footage revealed that the lorry had been left overnight with the handbrake off. Vetra admitted, "I should have paid more attention. But I was just reaching into my bag to get my baguette lunch."
The driver, Herwig Chopper, discovered that following the test run, he had hit a pine marten dashing across the car park. Chopper admitted, "I should have paid more attention. But I was just reaching into my bag to get my baguette lunch." The driver swiftly went to get help for the stricken marten, with the suspicion being that in the rush, he accidentally left the truck's handbrake off.
Footage taken later in the day revealed that the antiproton lorry began moving slowly forwards towards an identical vehicle containing protons, which had been used in 2024 to successfully transport protons across the lab's campus. Moments later, the two trucks collided and annihilated in a brilliant flash of light that dazzled the CCTV camera. The light was so intense that it was even picked up at CERN's Antiproton Proton RecoIL-1 (APRIL-1) experiment, which lies just a few hundred metres away.
Initial analysis by CERN scientists suggests that the collision resulted in the complete annihilation of both the antiprotons and protons, releasing a significant amount of energy in the process. The lab has since launched an internal investigation to determine how the lorry was able to move and collide with the proton vehicle, as well as to assess the implications of the antiproton loss on ongoing research.
The incident has raised questions about the safety protocols in place at CERN, particularly when handling such sensitive and valuable materials. The BASE experiment team has expressed disappointment and concern over the loss of their antiprotons, which had been painstakingly produced and collected over several years.
Despite the setback, CERN officials have reassured the scientific community that the lab's other experiments will continue as planned. They have also emphasized the importance of maintaining strict safety measures to prevent similar incidents from occurring in the future.
The disappearance of the antiproton lorry has become a topic of discussion among physicists and enthusiasts alike, with many speculating about the cause of the incident and its implications for the field of particle physics. As the investigation continues, the CERN community remains hopeful that the antiproton loss will not significantly impact their groundbreaking research.









