Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations
Abstract
We use lattice simulations to compute the baryon spectrum of SU(4) lattice gauge theory coupled to dynamical fermions in the fundamental and two-index antisymmetric (sextet) representations simultaneously. This model is closely related to a composite Higgs model in which the chimera baryon made up of fermions from both representations plays the role of a composite top-quark partner. The dependence of the baryon masses on each underlying fermion mass is found to be generally consistent with a quark-model description and large- Nc scaling. We combine our numerical results with experimental bounds on the scale of the new strong sector to estimate a lower bound on the mass of the top-quark partner. We discuss some theoretical uncertainties associated with this estimate.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Colorado, Boulder, CO (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1441073
- Alternate Identifier(s):
- OSTI ID: 1498851
- Report Number(s):
- arXiv:1801.05809
Journal ID: ISSN 2470-0010; PRVDAQ; 114505
- Grant/Contract Number:
- SC0010005; SC0012704
- Resource Type:
- Published Article
- Journal Name:
- Physical Review D
- Additional Journal Information:
- Journal Name: Physical Review D Journal Volume: 97 Journal Issue: 11; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Ayyar, Venkitesh, DeGrand, Thomas, Hackett, Daniel C., Jay, William I., Neil, Ethan T., Shamir, Yigal, and Svetitsky, Benjamin. Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations. United States: N. p., 2018.
Web. doi:10.1103/PhysRevD.97.114505.
Ayyar, Venkitesh, DeGrand, Thomas, Hackett, Daniel C., Jay, William I., Neil, Ethan T., Shamir, Yigal, & Svetitsky, Benjamin. Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations. United States. doi:10.1103/PhysRevD.97.114505.
Ayyar, Venkitesh, DeGrand, Thomas, Hackett, Daniel C., Jay, William I., Neil, Ethan T., Shamir, Yigal, and Svetitsky, Benjamin. Fri .
"Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations". United States. doi:10.1103/PhysRevD.97.114505.
@article{osti_1441073,
title = {Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations},
author = {Ayyar, Venkitesh and DeGrand, Thomas and Hackett, Daniel C. and Jay, William I. and Neil, Ethan T. and Shamir, Yigal and Svetitsky, Benjamin},
abstractNote = {We use lattice simulations to compute the baryon spectrum of SU(4) lattice gauge theory coupled to dynamical fermions in the fundamental and two-index antisymmetric (sextet) representations simultaneously. This model is closely related to a composite Higgs model in which the chimera baryon made up of fermions from both representations plays the role of a composite top-quark partner. The dependence of the baryon masses on each underlying fermion mass is found to be generally consistent with a quark-model description and large- Nc scaling. We combine our numerical results with experimental bounds on the scale of the new strong sector to estimate a lower bound on the mass of the top-quark partner. We discuss some theoretical uncertainties associated with this estimate.},
doi = {10.1103/PhysRevD.97.114505},
journal = {Physical Review D},
number = 11,
volume = 97,
place = {United States},
year = {2018},
month = {6}
}
DOI: 10.1103/PhysRevD.97.114505
Web of Science
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