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First evidence for string theory at the Large Hadron Collider

Jon Butterworth
London Guardian [1]
April 1, 2012

Complex software models are used to understand the results from the Large Hadron Collider.

These include simulations of the particle physics [2] in the proton-proton collisions, as well as of the material and geometry [3] of the detectors and the strength of the various magnetic fields. As more data are accumulated, the required precision of this software increases.

A recent review recommended that the number of decimal places used to represent numbers in the software should be increased. This means all mathematical constants such as e and pi, as well as physical constants and the measured dimensions of the detectors. So far, so routine. But when adding more precision to pi, a strange effect was noticed.

The alignment of charged particle tracks across detector boundaries actually got worse when a more precise value was used. In addition, the agreement between simulation and data also got slightly worse.

This really should not happen – more precision should mean better alignment and better agreement.

Full article here [1]