TY - JOUR

T1 - Screening of the confinement potential in the SU(2) lattice gauge theory with scalar matter

AU - Bock, W.

AU - Evertz, H.G.

AU - Jansen, K.

AU - Jersák, J.

AU - Kanaya, K.

AU - Kastrup, H.A.

AU - Landau, D.P.

AU - Neuhaus, T.

AU - Xu, J.L.

PY - 1990

Y1 - 1990

N2 - Using theSU (2) Higgs system with dynamical scalar matter fields as a model for analyzing screening properties of the confining potential in gauge theories, we examine the Wilson loopW (T, R) and the gauge invariant 2-point functionG(T, R) by Monte Carlo simulations on a 164 lattice. For small values of the hopping parameterk these quantities show non-asymptotic area law behavior which changes to asymptotic perimeter law behavior ask increases. Close to the Higgs phase transition we find an indication that both these asymptotic and nonasymptotic terms are present simultaneously within the lattice at different distancesR andT and that the breaking of the confining flux tube by matter pair production occurs within the lattice. Introducing an appropriate ansatz forW(T, R) andG(T, R), respectively, we determine in this complex situation the string tension, the screening energy of the external sources, and the order parameter introduced by Fredenhagen and Marcu.This

AB - Using theSU (2) Higgs system with dynamical scalar matter fields as a model for analyzing screening properties of the confining potential in gauge theories, we examine the Wilson loopW (T, R) and the gauge invariant 2-point functionG(T, R) by Monte Carlo simulations on a 164 lattice. For small values of the hopping parameterk these quantities show non-asymptotic area law behavior which changes to asymptotic perimeter law behavior ask increases. Close to the Higgs phase transition we find an indication that both these asymptotic and nonasymptotic terms are present simultaneously within the lattice at different distancesR andT and that the breaking of the confining flux tube by matter pair production occurs within the lattice. Introducing an appropriate ansatz forW(T, R) andG(T, R), respectively, we determine in this complex situation the string tension, the screening energy of the external sources, and the order parameter introduced by Fredenhagen and Marcu.This

UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-0002008449&partnerID=MN8TOARS

U2 - 10.1007/BF01556273

DO - 10.1007/BF01556273

M3 - Article

VL - 45

SP - 597

EP - 605

JO - Zeitschrift für Physik C, Particles and Fields

JF - Zeitschrift für Physik C, Particles and Fields

SN - 0170-9739

ER -