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THE UNIVERSE’S MISSING MASS.

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Title: THE UNIVERSE’S MISSING MASS.
Authors: SLATYER, TRACY R. (AUTHOR), TAIT, TIM M. P. (AUTHOR)
Source: Scientific American. Spring/Summer2026 Special, Vol. 35 Issue 2, p82-89. 8p. 2 Color Photographs, 2 Diagrams.
Subjects: Dark matter, Weakly interacting massive particles, Axions, Gauge bosons, Gravitational effects, Quantum chromodynamics, Sterile neutrinos, Black holes
Abstract: The article focuses on the ongoing scientific quest to identify the nature of dark matter, the invisible substance that constitutes most of the universe’s mass but remains undetected except through its gravitational effects. It outlines two leading theoretical candidates: weakly interacting massive particles (WIMPs), which are heavier particles interacting via the weak nuclear force, and axions, extremely light particles arising from quantum chromodynamics (QCD). Despite decades of experiments—including collider searches, direct detection, and astrophysical observations—dark matter has not yet been conclusively observed, prompting physicists to broaden their search to include a wide range of alternative theories such as sterile neutrinos, dark photons, and primordial black holes. The article emphasizes the complexity and diversity of dark matter models and the importance of a balanced research strategy combining deep investigation of favored candidates with exploratory searches across many possibilities. [Extracted from the article]
Copyright of Scientific American is the property of Scientific American and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: THE UNIVERSE’S MISSING MASS.
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  Data: <searchLink fieldCode="AR" term="%22SLATYER%2C+TRACY+R%2E%22">SLATYER, TRACY R.</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22TAIT%2C+TIM+M%2E+P%2E%22">TAIT, TIM M. P.</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Scientific+American%22">Scientific American</searchLink>. Spring/Summer2026 Special, Vol. 35 Issue 2, p82-89. 8p. 2 Color Photographs, 2 Diagrams.
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  Data: <searchLink fieldCode="DE" term="%22Dark+matter%22">Dark matter</searchLink><br /><searchLink fieldCode="DE" term="%22Weakly+interacting+massive+particles%22">Weakly interacting massive particles</searchLink><br /><searchLink fieldCode="DE" term="%22Axions%22">Axions</searchLink><br /><searchLink fieldCode="DE" term="%22Gauge+bosons%22">Gauge bosons</searchLink><br /><searchLink fieldCode="DE" term="%22Gravitational+effects%22">Gravitational effects</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+chromodynamics%22">Quantum chromodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Sterile+neutrinos%22">Sterile neutrinos</searchLink><br /><searchLink fieldCode="DE" term="%22Black+holes%22">Black holes</searchLink>
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  Data: The article focuses on the ongoing scientific quest to identify the nature of dark matter, the invisible substance that constitutes most of the universe’s mass but remains undetected except through its gravitational effects. It outlines two leading theoretical candidates: weakly interacting massive particles (WIMPs), which are heavier particles interacting via the weak nuclear force, and axions, extremely light particles arising from quantum chromodynamics (QCD). Despite decades of experiments—including collider searches, direct detection, and astrophysical observations—dark matter has not yet been conclusively observed, prompting physicists to broaden their search to include a wide range of alternative theories such as sterile neutrinos, dark photons, and primordial black holes. The article emphasizes the complexity and diversity of dark matter models and the importance of a balanced research strategy combining deep investigation of favored candidates with exploratory searches across many possibilities. [Extracted from the article]
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  Data: <i>Copyright of Scientific American is the property of Scientific American and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Text: English
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      – SubjectFull: Dark matter
        Type: general
      – SubjectFull: Weakly interacting massive particles
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      – SubjectFull: Axions
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      – SubjectFull: Gauge bosons
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      – SubjectFull: Sterile neutrinos
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              Text: Spring/Summer2026 Special
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