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Title: 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}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.97.114505

Citation Metrics:
Cited by: 8 works
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    Works referencing / citing this record:

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