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  • 2 years ago
UCA SPS - In Search of Saturation: The Structure of Hadrons at High Energy

UCA SPS - In Search of Saturation: The Structure of Hadrons at High Energy

https://www.youtube.com/watch?v=0h-N6hNhh7Q Streamed live on Jan 27, 2015 Join us for a Google Hangout Seminar with Dr. David Zaslavsky ( @ellipsix ) on Jan 27th to discuss high energy physics! Abstract: For half a century, physicists have been probing the structure of protons using particle accelerators with increasingly higher energies. As the collision energy has grown by orders of magnitude, the protons involved behave like increasingly dense collections of quarks and gluons, or partons, which we describe mathematically using parton distribution functions (PDFs). A PDF roughly represents the probability for a particular type of parton to interact with another particle during the collision. It's been clear for some time that, as collision energy increases, the PDFs grow in a way that is not sustainable. Extrapolating their behavior from the experimental results we have so far leads to nonsensical conclusions like probabilities greater than 1. Clearly, at some point a new physical

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