TY - JOUR

T1 - A new method for the beta function in the chiral symmetry broken phase

AU - Fodor, Zoltan

AU - Holland, Kieran

AU - Kuti, Julius

AU - Nogradi, Daniel

AU - Him Wong, Chik

N1 - Funding Information:
We acknowledge support by the DOE under grant DE-SC0009919, by the NSF under grants 1318220 and 1620845, by OTKA under the grant OTKA-NF-104034, and by the Deutsche Forschungsgemein-schaft grant SFB-TR 55. Computational resources were provided by the DOE INCITE program on the ALCF BG/Q platform, by USQCD at Fermilab, by the University of Wuppertal, by Juelich Super-

PY - 2018/3/26

Y1 - 2018/3/26

N2 - We describe a new method to determine non-perturbatively the beta function of a gauge theory using lattice simulations in the p-regime of the theory. This complements alternative measurements of the beta function working directly at zero fermion mass and bridges the gap between the weak coupling perturbative regime and the strong coupling regime relevant to the mass spectrum of the theory. We apply this method to SU(3) gauge theory with two fermion flavors in the 2-index symmetric (sextet) representation. We find that the beta function is small but non-zero at the renormalized coupling value g2 = 6.7, consistent with our previous independent investigation using simulations directly at zero fermion mass. The model continues to be a very interesting explicit realization of the near-conformal composite Higgs paradigm which could be relevant for Beyond Standard Model phenomenology.

AB - We describe a new method to determine non-perturbatively the beta function of a gauge theory using lattice simulations in the p-regime of the theory. This complements alternative measurements of the beta function working directly at zero fermion mass and bridges the gap between the weak coupling perturbative regime and the strong coupling regime relevant to the mass spectrum of the theory. We apply this method to SU(3) gauge theory with two fermion flavors in the 2-index symmetric (sextet) representation. We find that the beta function is small but non-zero at the renormalized coupling value g2 = 6.7, consistent with our previous independent investigation using simulations directly at zero fermion mass. The model continues to be a very interesting explicit realization of the near-conformal composite Higgs paradigm which could be relevant for Beyond Standard Model phenomenology.

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U2 - 10.1051/epjconf/201817508027

DO - 10.1051/epjconf/201817508027

M3 - Conference article

AN - SCOPUS:85045142736

VL - 175

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

SN - 2101-6275

M1 - 08027

T2 - 35th International Symposium on Lattice Field Theory, Lattice 2017

Y2 - 18 June 2017 through 24 June 2017

ER -