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Particle physics is the branch of physics that studies the universe’s fundamental particles—such as quarks, leptons, and bosons—and the forces governing them, as described by the Standard Model developed in the 1970s.

Overview

Particle physics (also called high‑energy physics) investigates the smallest known building blocks of matter and the fundamental interactions between them. It explores both matter particles (quarks and leptons) and force‑carrying particles (bosons). WikipediaWikipedia

What Particle Physics Studies

Elementary particles: Quarks, leptons, neutrinos, photons, gluons, W/Z bosons, and the Higgs boson. WikipediaWikipedia

Fundamental forces: Strong, weak, electromagnetic, and gravity (though gravity is not yet fully integrated into the Standard Model). web.cern.chweb.cern.ch

Antimatter: Each particle has a corresponding antiparticle with opposite charge. WikipediaWikipedia

Quantum fields: Particles are excitations of underlying quantum fields. WikipediaWikipedia

The Standard Model

The Standard Model is the dominant theoretical framework describing:

Three generations of quarks and leptons

Force carriers for strong, weak, and electromagnetic interactions

Predictive structures that have been experimentally confirmed, including the Higgs boson web.cern.chweb.cern.ch

How Particle Physics Is Studied

Particle accelerators (e.g., the Large Hadron Collider) smash particles at high energies to reveal subatomic structure. WikipediaWikipedia

Detectors observe the resulting particle interactions and decays.

Theoretical physics develops mathematical models to explain and predict particle behavior. WikipediaWikipedia

Why It Matters

Particle physics helps explain:

The composition of matter

The forces shaping the universe

Phenomena such as the early universe, symmetry, and the nature of mass

Particle physics remains a central field for understanding the fundamental structure of reality.