Limits at 95% confidence level are set on anomalous quartic gauge couplings.
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The third power of x yields a cubic equation and the fourth power a quartic.
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The measured cross section is used to set limits on anomalous quartic gauge couplings in the high diphoton mass region.
4
In the early 16th century, Italian mathematicians discovered how to solve equations of third and fourth degree, or cubic and quartic equations.
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In this work we investigate fractal structures in the parameter space of two conservative dynamical systems: the standard nontwist map and the quartic nontwist map.
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The solution of cubics and quartics was the first substantial advance in mathematics in Europe since the days of the ancient Greeks.