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Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
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The order of magnitude of a number is the power of 10 that most closely approximates it. Thus, the order of magnitude estimates the scale (or size) of its value. To find the order of magnitude of a number, take the base-10 logarithm of the number and round it to the nearest integer. Then the order of magnitude of the number is simply the resulting power of 10.
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Related Experiment Video

Updated: Mar 19, 2026

Setting Limits on Supersymmetry Using Simplified Models
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Ordering Multiple Soft Gluon Emissions.

René Ángeles Martínez1, Jeffrey R Forshaw1, Michael H Seymour1

  • 1Consortium for Fundamental Physics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom.

Physical Review Letters
|June 11, 2016
PubMed
Summary

We developed a new QCD amplitude expression for hard scattering processes with soft gluon emissions. This work advances the development of all-orders algorithms for multiple emissions in quantum chromodynamics calculations.

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Area of Science:

  • High Energy Physics
  • Quantum Chromodynamics (QCD)

Background:

  • Calculating QCD amplitudes is crucial for understanding particle collisions.
  • Handling multiple soft gluon emissions in hard scattering processes presents significant theoretical challenges.

Purpose of the Study:

  • To present a novel expression for the QCD amplitude in general hard scattering processes.
  • To facilitate the development of all-orders algorithms for multiple soft gluon emissions.

Main Methods:

  • The study derives an expression for the QCD amplitude accurate to one-loop.
  • The amplitude is formulated in two equivalent representations: ordered operators by dipole transverse momentum and loop-expanded currents.

Main Results:

  • A new expression for the QCD amplitude is provided, incorporating any number of soft gluon emissions.
  • The results are presented in two distinct, yet equivalent, mathematical forms.

Conclusions:

  • The presented results are expected to aid in creating advanced algorithms for multiple emissions.
  • This work contributes to a more comprehensive understanding of QCD amplitudes, including full color structure and complex contributions.