Conformal symmetry vs. chiral symmetry breaking in the SU(3) sextet model

Vincent Drach, Martin Hansen, Ari Hietanen, Claudio Pica, Francesco Sannino

Research output: Contribution to journalConference articleResearchpeer-review

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Abstract

We present new results for the SU(3) "sextet model" with two flavors transforming according to the two-index symmetric representation of the gauge group. The simulations are performed using unimproved Wilson fermions. We measure the meson and baryon spectrum of the theory for multiple bare quark masses at two different lattice spacings. To address the pressing issue of whether the model is inside or below the conformal window, we compare the spectrum to the expectations for a theory with spontaneous chiral symmetry breaking and to those of an IR conformal theory. Regardless of the answer (conformal or chirally broken), the theory is a cornerstone in our understanding of near-conformal and composite dynamics, ranging from Technicolor models to unparticle physics. It is also interesting for the composite dynamics of vector-like singlets with respect to the Standard Model interactions.
Original languageEnglish
JournalP o S - Proceedings of Science
Number of pages7
ISSN1824-8039
Publication statusPublished - 18. Aug 2015
Event33rd International Symposium on Lattice Field Theory - Kobe Convention Center, Kobe, Japan
Duration: 14. Jul 201518. Jul 2015

Conference

Conference33rd International Symposium on Lattice Field Theory
LocationKobe Convention Center
CountryJapan
CityKobe
Period14/07/201518/07/2015

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broken symmetry
symmetry
composite materials
pressing
baryons
mesons
fermions
spacing
quarks
physics
simulation
interactions

Keywords

  • hep-lat

Cite this

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title = "Conformal symmetry vs. chiral symmetry breaking in the SU(3) sextet model",
abstract = "We present new results for the SU(3) {"}sextet model{"} with two flavors transforming according to the two-index symmetric representation of the gauge group. The simulations are performed using unimproved Wilson fermions. We measure the meson and baryon spectrum of the theory for multiple bare quark masses at two different lattice spacings. To address the pressing issue of whether the model is inside or below the conformal window, we compare the spectrum to the expectations for a theory with spontaneous chiral symmetry breaking and to those of an IR conformal theory. Regardless of the answer (conformal or chirally broken), the theory is a cornerstone in our understanding of near-conformal and composite dynamics, ranging from Technicolor models to unparticle physics. It is also interesting for the composite dynamics of vector-like singlets with respect to the Standard Model interactions.",
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journal = "P o S - Proceedings of Science",
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Conformal symmetry vs. chiral symmetry breaking in the SU(3) sextet model. / Drach, Vincent; Hansen, Martin; Hietanen, Ari; Pica, Claudio; Sannino, Francesco.

In: P o S - Proceedings of Science, 18.08.2015.

Research output: Contribution to journalConference articleResearchpeer-review

TY - GEN

T1 - Conformal symmetry vs. chiral symmetry breaking in the SU(3) sextet model

AU - Drach, Vincent

AU - Hansen, Martin

AU - Hietanen, Ari

AU - Pica, Claudio

AU - Sannino, Francesco

PY - 2015/8/18

Y1 - 2015/8/18

N2 - We present new results for the SU(3) "sextet model" with two flavors transforming according to the two-index symmetric representation of the gauge group. The simulations are performed using unimproved Wilson fermions. We measure the meson and baryon spectrum of the theory for multiple bare quark masses at two different lattice spacings. To address the pressing issue of whether the model is inside or below the conformal window, we compare the spectrum to the expectations for a theory with spontaneous chiral symmetry breaking and to those of an IR conformal theory. Regardless of the answer (conformal or chirally broken), the theory is a cornerstone in our understanding of near-conformal and composite dynamics, ranging from Technicolor models to unparticle physics. It is also interesting for the composite dynamics of vector-like singlets with respect to the Standard Model interactions.

AB - We present new results for the SU(3) "sextet model" with two flavors transforming according to the two-index symmetric representation of the gauge group. The simulations are performed using unimproved Wilson fermions. We measure the meson and baryon spectrum of the theory for multiple bare quark masses at two different lattice spacings. To address the pressing issue of whether the model is inside or below the conformal window, we compare the spectrum to the expectations for a theory with spontaneous chiral symmetry breaking and to those of an IR conformal theory. Regardless of the answer (conformal or chirally broken), the theory is a cornerstone in our understanding of near-conformal and composite dynamics, ranging from Technicolor models to unparticle physics. It is also interesting for the composite dynamics of vector-like singlets with respect to the Standard Model interactions.

KW - hep-lat

M3 - Conference article

JO - P o S - Proceedings of Science

JF - P o S - Proceedings of Science

SN - 1824-8039

ER -