How Did Matter Come to Dominate Over Anti-Matter?

The predecessors of today’s neutrinos might have played a role in causing matter to dominate over anti-matter in the early universe. 

 

Soon after the Big Bang we expect there should have been roughly equal amounts of matter and anti-matter.  But if that were the case those two kinds of particles would come together and destroy each other and you might be left with just a sea of radiation.  We know that’s not the case because we’re here.  So the universe today is dominated by matter.  How did that come about? 


How did matter come to dominate over anti-matter?  That’s one of the biggest and most difficult questions that both physicists and cosmologists have.  They have some ideas as to what might be responsible but they don’t really know for sure.  

One of the more compelling explanations is that the predecessors of today’s neutrinos might have played a role in causing that asymmetric.  The reason for that is that maybe the neutrino and its anti-matter twin don’t behave exactly the same way.  They might behave the same way or they might not.  And if they don’t, that might give us a way of accounting for explaining how matter came to dominate over anti-matter in the early universe. 

In Their Own Words is recorded in Big Think's studio.

Image courtesy of Shutterstock

LinkedIn meets Tinder in this mindful networking app

Swipe right to make the connections that could change your career.

Getty Images
Sponsored
Swipe right. Match. Meet over coffee or set up a call.

No, we aren't talking about Tinder. Introducing Shapr, a free app that helps people with synergistic professional goals and skill sets easily meet and collaborate.

Keep reading Show less

This 1997 Jeff Bezos interview proves he saw the future coming

Jeff Bezos, the founder of Amazon.com, explains his plan for success.

Technology & Innovation
  • Jeff Bezos had a clear vision for Amazon.com from the start.
  • He was inspired by a statistic he learned while working at a hedge fund: In the '90s, web usage was growing at 2,300% a year.
  • Bezos explains why books, in particular, make for a perfect item to sell on the internet.
Keep reading Show less
Promotional photo of Lena Headey as Cersei Lannister on Game of Thrones
Surprising Science
  • It's commonly thought that the suppression of female sexuality is perpetuated by either men or women.
  • In a new study, researchers used economics games to observe how both genders treat sexually-available women.
  • The results suggests that both sexes punish female promiscuity, though for different reasons and different levels of intensity.
Keep reading Show less

TESS telescope has found eight new planets, six supernovae

It has found several bizarre planets outside of our solar system.

NASA/Kim Shiflett
Surprising Science
  • The Kepler program closed down in August, 2018, after nine and a half years of observing the universe.
  • Picking up where it left off, the Transiting Exoplanet Survey Satellite (TESS) has already found eight planets, three of which scientists are very excited about, and six supernovae.
  • In many ways, TESS is already outperforming Kepler, and researchers expect it to find more than 20,000 exoplanets over its lifespan.
Keep reading Show less