CERN'de Hangi Sorulara Cevap Aranıyor? I Parçacık Fiziği ve CERN I Prof. Dr. Kerem Cankoçak

Key Takeaways

• The fundamental questions driving particle physics at CERN, such as the composition and origin of the universe, echo inquiries posed by ancient Greek natural philosophers 2500 years ago.
• The concept of the atom has evolved significantly, from Democritus' indivisible particles to the modern understanding of atoms composed of protons, neutrons, and electrons, and further to quarks.
• While the US, Russia, China, and Japan are not CERN member states, they actively contribute human and financial resources to CERN's experiments, highlighting its international collaborative nature.
• The discovery of subatomic particles like the electron by J.J. Thomson and the atomic nucleus by Rutherford in the early 20th century revealed that atoms are not fundamental.
• Modern particle physics considers quarks and leptons (like electrons) as the fundamental building blocks of matter, with protons and neutrons themselves being composed of quarks.
• The vast scale differences in the universe are illustrated by comparing human size to cells, DNA, atoms, and atomic nuclei, with atoms being about 10 billion times smaller than humans.
• Particle decay, a phenomenon where unstable particles transform into other particles like neutrons decaying into protons, electrons, and neutrinos, is a key concept in understanding subatomic interactions.
• Protons and neutrons, which constitute the majority of an atom's mass, are composed of different combinations of up and down quarks, with heavier quarks quickly decaying into lighter ones.