Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations

doi:10.1103/physrevd.97.114505

Title: Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations

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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- N _c 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:

Ayyar, Venkitesh ^[1]; DeGrand, Thomas ^[1]; Hackett, Daniel C. ^[1]; Jay, William I. ^[1]; Neil, Ethan T. ^[2]; Shamir, Yigal ^[3]; Svetitsky, Benjamin ^[3]

Univ. of Colorado, Boulder, CO (United States)
Univ. of Colorado, Boulder, CO (United States); Brookhaven National Lab. (BNL), Upton, NY (United States)
Tel Aviv Univ., Ramat Aviv (Israel)

Publication Date:: 2018-06-08

Research Org.:: Univ. of Colorado, Boulder, CO (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1441073

Alternate Identifier(s):: OSTI ID: 1498851

Grant/Contract Number:: sc0010005; SC0012704

Resource Type:: Published Article

Journal Name:: Physical Review D

Additional Journal Information:: 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.

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                    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.

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                    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.

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@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}

}

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DOI: 10.1103/physrevd.97.114505

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Baryon spectrum of SU(4) composite Higgs theory with two distinct fermion representations

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