China's Particle Detector Logs 2.7 Trillion Subatomic Events
Researchers at China's BESIII detector have precisely counted 2.7 trillion rare particle events collected over more than a decade, establishing a crucial baseline for fundamental physics research. The meticulous inventory—with negligible measurement error—enables scientists worldwide to search for new physics and validates the detector's reliability for future discoveries in particle behavior.
Originaltitel: Determination of the number of <em>ψ</em>(3686) events taken at BESIII
<p>The number of <em>Ψ</em>(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3 ± 11.1)x10<sup>6</sup> by counting inclusive <em>ψ</em>(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of <em>Ψ</em>(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7 ± 0.6)x10<sup>6</sup> and (345.4 ± 2.6)x10<sup>6</sup>, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of <em>ψ</em>(3686) events in the three data samples is (2712.4 ± 14.3)x10<sup>6</sup>.</p>