Chimera baryon spectrum in a Sp(4) lattice gauge theory

Ho Hsiao^1*, C.-J. David Lin^1,2, Ed Bennett³, Deog Ki Hong⁴, Jong-Wan Lee^4,5, Biagio Lucini^3,6, Maurizio Piai⁷, Davide Vadacchino⁸

¹Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
²Center for High Energy Physics, Chung-Yuan Christian University, Chung-Li, Taiwan
³Swansea Academy of Advanced Computing, Swansea University (Bay Campus), Swansea, Wales, UK
⁴Department of Physics, Pusan National University, Busan, Korea
⁵Institute for Extreme Physics, Pusan National University, Busan, Korea
⁶Department of Mathematics, Faculty of Science and Engineering, Swansea University (Bay Campus), Swansea, Wales, UK
⁷Department of Physics, Faculty of Science and Engineering,, Swansea University (Park Campus), Swansea, Wales, UK
⁸Centre for Mathematical Science, University of Plymouth, Plymouth, UK

* Presenter:Ho Hsiao, email:thepaulxiao@gmail.com

Chimera baryons are exotic objects playing the role of top partner in top partial compositeness among composite Higgs models. In the Sp(4) gauge theory with two fundamental and three antisymmetric Dirac fermions, they are composed of two fundamental and one antisymmetric fermion constituents. We present our preliminary results of Λ: (J, R) = (1/2, 5), Σ: (J, R) = (1/2, 10) and Σ*: (J, R) = (3/2, 10) chimera baryons in the quenched approximation. The fermion mass dependence of chimera baryon masses and their hierarchy will be discussed. This exploratory study will provide a guidance of our future investigations with fully dynamical lattice simulations.

Keywords: Composite Higgs model , Chimera baryon , lattice gauge theory