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Top quark UPSC NOTE

 Why in news

  • Physicists discovered the top quark in 1995 at a particle accelerator in the US called the Tevatron, measuring its mass to be 151-197 GeV/c2 (a unit of mass used for subatomic particles)

  • Other experiments and research groups yielded more precise values over time. 

  • On June 27, physicists at the Large Hadron Collider (LHC) in Europe reported the most precise figure yet: 172.52 GeV/c2.

Top quark

  • The top quark is the universe’s heaviest elementary particle. 

  • It is 10-times heavier than a water molecule, about three-times as much as a copper atom, and 95% as much as a full caffeine molecule.

  • As a result, the top quark is so unstable that it could break up into lighter, more stable particles in less than 10−25 seconds.

  • Its high mass implies that of all elementary particles, it interacts most strongly with the Higgs boson particle

  • Because top quarks are very massive, large amounts of energy are needed to create one

  • The only way to achieve such high energies is through high-energy collisions

  • These occur naturally in the Earth's upper atmosphere as cosmic rays collide with particles in the air, or can be created in a particle accelerator. 



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Learnerz IAS | Concept oriented UPSC Classes in Malayalam: Top quark UPSC NOTE
Top quark UPSC NOTE
Learnerz IAS | Concept oriented UPSC Classes in Malayalam
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