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Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Interference: Path Lengths01:10

Interference: Path Lengths

Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
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Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
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Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
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Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences01:20

Inductively Coupled Plasma-Mass Spectrometry (ICP-MS): Interferences

Inductively coupled plasma–mass spectrometry (ICP–MS) is a highly selective and sensitive technique for accurate elemental analysis. Though the analysis of ICP–MS mass spectra is comparatively straightforward, it is affected by spectroscopic and non-spectroscopic interferences. Spectroscopic interferences arise when the plasma contains ionic species with an m/z value the same as the analyte ion. Spectroscopic interference can be categorized as isobaric, polyatomic ions, and refractory oxide ion...

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Setting Limits on Supersymmetry Using Simplified Models
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Bounding the Higgs boson width through interferometry.

Lance J Dixon1, Ye Li

  • 1SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94309, USA.

Physical Review Letters
|October 1, 2013
PubMed
Summary
This summary is machine-generated.

Researchers studied the Higgs boson

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Area of Science:

  • High Energy Physics
  • Quantum Chromodynamics
  • Particle Physics

Background:

  • The Higgs boson's decay to two photons (γγ) exhibits interference with the continuum background.
  • Previous leading-order approximations indicated a ~100 MeV apparent Higgs mass shift.

Purpose of the Study:

  • To compute next-to-leading-order QCD corrections to the apparent Higgs mass shift.
  • To investigate the Higgs boson width's impact on this mass shift.
  • To explore the potential for measuring Higgs boson properties at the Large Hadron Collider.

Main Methods:

  • Calculation of next-to-leading-order QCD corrections to the gg→γγ process.
  • Analysis of the diphoton-invariant-mass distribution.
  • Model development to study Higgs width dependence.

Main Results:

  • Next-to-leading-order QCD corrections reduce the apparent mass shift by approximately 40%.
  • The apparent mass shift increases with the Higgs boson width, exceeding 200 MeV for widths above 30 MeV.
  • A strong dependence of the mass shift on Higgs transverse momentum was identified.

Conclusions:

  • The apparent Higgs mass shift offers a potential method for measuring or bounding the Higgs boson width at the LHC.
  • Exploiting the Higgs transverse momentum dependence could enhance measurement accuracy.
  • Comparing the diphoton channel with the ZZ* channel may aid in observing the shift.