Dynamically-generated baryon resonances with heavy flavor
PhD ceremony: | Ms O. Romanets |
When: | January 10, 2014 |
Start: | 11:00 |
Supervisor: | prof. dr. R.G.E. (Rob) Timmermans |
Co-supervisor: | dr. L. tolos |
Where: | Academy building RUG |
Faculty: | Science and Engineering |
The study of heavy hadrons is a central topic in particle
physics. In contrast to the particles built of light quarks, states
that contain heavy quarks (charm or bottom) are difficult to treat,
because there is no rigorous model to describe these states.
On the other hand, the development of new techniques in
experimental physics makes possible the observation of new states
with heavy flavor. It is nowadays a challenge to interpret the
nature of these new detected particles. Hadron resonances
(particles that can decay in other ones) can be interpreted as
states made of quarks or/and states built of hadrons, called
molecular states.
In this thesis we study baryon resonances with heavy flavor,
molecular states generated dynamically from the scattering of
mesons with baryons. For this purpose we use a model which respects
two important symmetries Quantum Chromodynamics, chiral symmetry
and heavy-quark spin symmetry.
We find charm and strange baryon resonances that can be compared
to experimental states, and also make predictions for other states,
with total number of charm 1, 2, and 3. Moreover, two
bottom-flavored states with masses 5912 and 5920 MeV have been
obtained in our model. These states were found by the LHCb
collaboration last year. We have also analyzed hidden-charm baryon
resonances, and predict states with masses around 4 GeV, most of
them as bound states. All these results will be tested in the near
future by the PANDA experiment at the FAIR facility in Germany.