8-12 July 2013
Africa/Johannesburg timezone
<a href="http://events.saip.org.za/internalPage.py?pageId=13&confId=32"><font color=#ff0000>SAIP2013 PROCEEDINGS AVAILABLE</font></a>

Heavy Baryons with Strangeness

10 Jul 2013, 11:10
20m
Oral Presentation Track G - Theoretical and Computational Physics Theoretical

Speaker

Mr Jaco Blanckenberg (Stellenbosch University)

Would you like to <br> submit a short paper <br> for the Conference <br> Proceedings (Yes / No)?

Yes

Main supervisor (name and email)<br>and his / her institution

Herbert Weigel
weigel@sun.ac.za
Univeristy of Stellenbosch

Level for award<br>&nbsp;(Hons, MSc, <br> &nbsp; PhD)?

PhD

Apply to be<br> considered for a student <br> &nbsp; award (Yes / No)?

Yes

Abstract content <br> &nbsp; (Max 300 words)

We are interested in the soliton description of baryons with a single heavy quark (charm or bottom). In this approach such baryons emerge as bound composites of a soliton of meson fields built from light quarks (up, down, strange) and a meson field that contains a heavy quark. The soliton must then be quantized as a diquark because the fermionic character arises from binding the heavy meson field. We are particularly interested in heavy baryons that have non-zero strangeness; in the quark model that corresponds to, say, up-strange-bottom (usb). Thus the flavor symmetry breaking among the light quarks must be fully incorporated when constructing diquark states. In the soliton model that symmetry breaking is parameterized by differences between the masses and decay constants of kaons and pions. Here we present computations of the diquark eigen-energies and eigen-functions that incorporate all orders of the light flavor symmetry breaking. We also compare these results to a leading order treatment of flavor symmetry breaking.
The heavy meson couples according to the heavy spin-flavor symmetry to the chiral field that carries the soliton. In the background of the soliton the heavy meson field develop bound states. We compute the associated binding energies. These are the seocond major ingredient for our prediction of the usb-mass.

Primary author

Mr Jaco Blanckenberg (Stellenbosch University)

Presentation Materials

Peer reviewing

Paper