Ralf Seidl RIKEN To study the strong interaction in nucleon structure and fragmentation
Understanding the strong interaction QCD:
We know, that the strong interaction, Quantum Chromo Dynamics (QCD) is responsible for almost all the visible mass in the universe. While the Higgs field gives quarks its mass the bulk of the mass of protons and neutrons originates from the QCD dynamics.
While it is possible to use QCD quantitatively when the energy scales are very large QCD bound states like the proton as well as their formation cannot be described quantitatively and need to be extracted from experiment
I am working on extracting these distribution and fragmentation functions especially under the inclusion of spin and transverse momentum
Current Highlights:
- Transverse momentum dependent production cross sections of charged pions, kaons and protons in e+e- annihilation at 10.58 GeV
transverse momentum dependent fragmenation functions at Belle
forward RHIC spin upgrades
polarized electron ion collider EIC
Selected recent presentations
DIS2016 (Hamburg, Germany, April 2016):"Spin Physics", invited plenary presentation (link)
DIS2016 (Hamburg, Germany, April 2016):"Gluon spin measurements in PHENIX", spin parallel session presentation (link)
SPIN2016 (Urbana,IL, USA, September 2016):"The Belle fragmentation program", invited presentation (link)
Nuclear physics long range plan QCD town meeting, (Philadelphia, PA, USA, September 2014):"Experimental overview: Nucleon spin structure", invited presentation(link)
Joint Meeting of the JPS and DNP, (Waikoloa, HI, USA, October 2014):"Three-dimensional imaging and spin: From Valence quarks to the sea", invited presentation in "Future Directions in high energy QCD"(link)
Hadron 2013, (Nara, Japan, November 2013):"Fragmentation function measurements", invited plenary presentation(link)
