The Large Hadron Collider

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The Higgs Boson and Beyond Course
The discovery of the Higgs boson is a triumph of modern physics. The hunt for the Higgs was the subject of wide media attention due to the cost of the project, the complexity of the experiment, and the importance of its result. And, when it was announced with great fanfare…
Capturing the Higgs Boson
Looking for a needle in a haystack? Try looking for a never-before-seen particle in the largest machine ever built. With the LHC complete, the search for the Higgs began in earnest, and particle physics combined with probability to find the missing piece in the Standard Model puzzle. Professor Carroll describes…
Quantum Weirdness and Schrödinger's Cat
Wave-particle duality gives rise to strange phenomena, some of which are explored in Schrodinger's famous "cat in the box" example. Philosophical debate on Schrodinger's cat still rages.
The Particle Zoo
Are quarks, the particles that make up protons and neutrons, the truly elementary particles? What are the three fundamental forces that physicists identify as holding particles together? Are they manifestations of a single, universal force?
Wave or Particle?
Einstein's resolution of the photoelectric effect problem suggests that light consists of particles (photons). But how can this be reconciled with the understanding of light as an electromagnetic wave?
Particle or Wave?
In 1923, Louis de Broglie proposed that, like light photons, particles of matter might also display wave properties. The wave nature of smaller particles such as electrons is quite visible and leads to many unusual phenomena, including quantum tunneling mentioned in Lecture 1.
What about E=mc² and Is Everything Relative?
Shortly after publishing his 1905 paper on special relativity, Einstein realized that his theory required a fundamental equivalence between mass and energy, which he expressed in the equation E=mc2. Among other things, this famous formula means that the energy contained in a single raisin could power a large city for…
Simple Nature
In Simple Nature, world famous physicist Dr. Leonard Susskind introduces The Anthropic Principle in an entertaining, accessible and informative way. Proposed in the 1970's, The Anthropic Principle attempts to explain how the physics of the universe may be perfectly tuned for life to evolve. Any small tweak in gravity or…
Mass and Energy
In this lecture, "classical" physics, as explained by Newtonian and Einsteinian mechanics, provides insight into what makes the Higgs so special. Uncover the key to the Higgs's uniqueness in the particle zoo--that even at its minimum energy state (its "resting" state), the Higgs field has a large, constant value.
Time Reversal in Particle Physics
Explore advances in physics since Newton's time that reveal exceptions to the rule that interactions between moving particles are fully reversible. Could irreversible reactions between elementary particles explain the arrow of time? Weigh the evidence for and against this view.
Atoms to Particles
Now that you know what particles really are, it's time to walk through the "particle zoo" and explore the roles of photons, gluons, and quarks. Along the way, Professor Carroll looks back on the development of the Standard Model and how our changing understanding of the weak nuclear field suggested…
Into the Heart of Matter
With this lecture, you turn from relativity to explore the universe at the smallest scales. By the early 1900s, Ernest Rutherford and colleagues showed that atoms consist of a positively charged nucleus surrounded by negatively charged electrons whirling around it. But Rutherford's model could not explain all the observed phenomena.