Hitoshi Murayama Home Page

Popular Talks (Video)

Science Agora 2020 (Japanese), video

The Matter Of Antimatter: Answering The Cosmic Riddle Of Existence

You exist. You shouldn't. Stars and galaxies and planets exist. They shouldn't. The nascent universe contained equal parts matter and antimatter that should have instantly obliterated each other, turning the Big Bang into the Big Fizzle. And yet, here we are: flesh, blood, stars, moons, sky. Why? Come join us as we dive deep down the rabbit hole of solving the mystery of the missing antimatter.

MODERATOR: Brian Greene

PARTICIPANTS: Marcela Carena, Janet Conrad, Michael Doser, Hitoshi Murayama, Neil Turok

The Dark Side of the Universe

First OIST Presidential Lecture

Dark Matter is a part of the reason why we exist. There is plenty of evidence that dark matter exists in our own galaxy, other galaxies, and in clusters of galaxies. On the other hand, Dark Energy is speeding up the expansion of the Universe, and it may even lead the Universe to become infinitely fast and come to an end. Dr. Murayama discusses what researchers are doing, and trying to understand what these are.

Quantum Universe

Hintze Lecture at Oxford 2015

Where do we come from? Science is making progress on this age-old question of humankind. The Universe was once much smaller than the size of an atom. Small things mattered in the small Universe, where quantum physics dominated the scene. To understand the way the Universe is today, we have to solve remaining major puzzles. The Higgs boson that was discovered recently is holding our body together from evaporating in a nanosecond. But we still do not know what exactly it is. The mysterious dark matter is holding the galaxy together, and we would not have been born without it. But nobody has seen it directly. And what is the very beginning of the Universe?

Dark Matters

Talk at TEDxTokyo 2010

Promotion video for Coursera MOOC

Nearly 50,000 students signed up for this online course from more than 140 countries

E=mc²

A talk at Lawrence Berkeley National Laboratory on Einstein's famous equation

Mysteries of the Quantum Universe

A public talk at an IMAX theater at Science World in Vancouver

Recent Talks for Physicists

Dark Energy and Dark Matter with Subaru Telescope (video)

a talk at APCTP on August 18, 2020

Two Tales of Baryogenesis (video)

Seminar at UC Davis on January 27, 2020

When a Symmetry Breaks (video)

What is common among a magnet, a flounder, a rack of laundry, your heart on the left of your body, and the Higgs boson? The concept of spontaneous symmetry breaking is ubiquitous among many natural phenomena. I’ll describe the basic concept and its applications. In particular, the original concepts from Anderson, Nambu, Goldstone, and Higgs do not quite work in many systems that include a magnet on your fridge. I generalize the concept so that it is applicable to all known natural phenomena around us.

Colloquium at Cornell on Oct. 19, 2015

What's wrong with Goldstone? (PDF)

Spontaneous Symmetry Breaking is a very universal concept applicable for a wide range of subjects: crystal, superfluid, neutron stars, Higgs boson, magnets, and many others. Yet there is a variety in the spectrum of gapless excitations even when the symmetry breaking patterns are the same. We unified all known examples in a single-line Lagrangian of the low-energy effective theory. In addition, we now have a better understanding of what happens with spacetime symmetries, and predict gaps for certain states exactly based on symmetries alone.

Seminar at CERN on Dec 11, 2013

The Dark Side of the Universe (video)

Asian Europe Physics Summit 2011 in Wroclaw, Poland

Closing Lecture at CERN Summer Institute 2011 (video)

Lectures on the Standard Model at CERN Summer Institute 2009 (video)

Lectures on the Baryon Asymmetry at CERN Academic Training Lecture 2010 (video)

TV Shows

Cosmic Front Next (DVD)

Courses

Physics 7C (Spring 1996)

229A (Fall 1996)

229B (Spring 1997)