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2. Kaon - Wikipedia

   en.wikipedia.org/wiki/Kaon

   This led to the so-called 'tau–theta' problem: [13] what seemed to be the same particle (now called K +) decayed in two different modes, Theta to two pions (parity +1), Tau to three pions (parity −1). [12] The solution to this puzzle turned out to be that weak interactions do not conserve parity. [7]

3. Bevatron - Wikipedia

   en.wikipedia.org/wiki/Bevatron

   Shortly after the Bevatron came into use, it was recognized that parity was not conserved in the weak interactions, which led to resolution of the tau-theta puzzle, the understanding of strangeness, and the establishment of CPT symmetry as a basic feature of relativistic quantum field theories.

4. Nuclear emulsion - Wikipedia

   en.wikipedia.org/wiki/Nuclear_emulsion

   A nuclear emulsion plate is a type of particle detector first used in nuclear and particle physics experiments in the early decades of the 20th century. [1] [2] [3] It is a modified form of photographic plate that can be used to record and investigate fast charged particles like alpha-particles, nucleons, leptons or mesons.

5. Greek letters used in mathematics, science, and engineering

   en.wikipedia.org/wiki/Greek_letters_used_in...

   theta functions; the angle of a scattered photon during a Compton scattering interaction; the angular displacement of a particle rotating about an axis; the Watterson estimator in population genetics; ϑ ("script theta"), the cursive form of theta, often used in handwriting, represents the first Chebyshev function in number theory; Theta role ...

6. Eta and eta prime mesons - Wikipedia

   en.wikipedia.org/wiki/Eta_and_eta_prime_mesons

   The eta ( η) and eta prime meson ( η′) are isosinglet mesons made of a mixture of up, down and strange quarks and their antiquarks.The charmed eta meson ( η c) and bottom eta meson

7. Doctors Say This Viral "Sleep Rule" Actually Works - AOL

   www.aol.com/lifestyle/doctors-viral-sleep-rule...

   TikTok is filled with tips and tricks — some legitimate, many not — to help you sleep better.One of the latest encourages people to follow a 10-3-2-1-0 sleep rule, which is actually not just ...