Apparent Excess in e+e- --> hadrons
Michael Schmitt (Northwestern University)
TL;DR
This paper reports an observed excess in the e+e- to hadrons cross section measurements across 20-209 GeV, exceeding Standard Model predictions by over 4 sigma, suggesting potential new physics such as light scalar down-type quarks.
Contribution
The study provides the first comprehensive analysis of cross section data over a wide energy range, highlighting a significant deviation from Standard Model expectations.
Findings
Over 4 sigma excess in cross section measurements
Potential indication of new physics like light scalar down-type quarks
Consistent excess observed across the entire energy range
Abstract
We have studied measurements of the cross section for e+e- --> hadrons for center-of-mass energies in the range 20--209 GeV. We find an apparent excess over the predictions of the Standard Model across the whole range amounting to more than 4\sigma. As an example, we compare the data to predictions for a light scalar down-type quark which fit the excess well.
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Taxonomy
TopicsQuantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies · High-Energy Particle Collisions Research