Dynamics of Monopoles and Flux Tubes in Two-Flavor Dynamical QCD.pdfVIP

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Dynamics of Monopoles and Flux Tubes in Two-Flavor Dynamical QCD.pdf

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Dynamics of Monopoles and Flux Tubes in Two-Flavor Dynamical QCD

a r X i v : h e p - l a t / 0 3 1 0 0 1 1 v 1 3 O c t 2 0 0 3 DESY 03-162 ITEP-LAT/2002-28 KANAZAWA-03-07 Dynamics of Monopoles and Flux Tubes in Two-Flavor Dynamical QCD V.G. Bornyakov a,b,c, H. Ichie d 1 , Y. Koma a 2 , Y. Mori a, Y. Nakamura a, D. Pleiter e, M.I. Polikarpov c, G. Schierholz e,f, T. Streuer e,g, H. Stu?ben h and T. Suzuki a – DIK Collaboration – aInstitute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192, Japan bInstitute for High Energy Physics IHEP, RU-142284 Protvino, Russia cInstitute of Theoretical and Experimental Physics ITEP, RU-117259 Moscow, Russia dInstitut fu?r Physik, Humboldt-Universita?t zu Berlin, D-10115 Berlin, Germany eJohn von Neumann-Institut fu?r Computing NIC, Deutsches Elektronen-Synchrotron DESY, D-15738 Zeuthen, Germany fDeutsches Elektronen-Synchrotron DESY, D-22603 Hamburg, Germany gInstitut fu?r Theoretische Physik, Freie Universita?t Berlin, D-14196 Berlin, Germany hKonrad-Zuse-Zentrum fu?r Informationstechnik Berlin ZIB, D-14195 Berlin, Germany Abstract We investigate the confining properties of the QCD vacuum with Nf = 2 flavors of dynamical quarks, and compare the results with the properties of the quenched theory. We use non-perturbatively O(a) improved Wilson fermions to keep cut-off effects small. We focus on color magnetic monopoles. Among the quantities we study are the monopole density and the monopole screening length, the static potential and the profile of the color electric flux tube. We furthermore derive the low-energy effective monopole action. Marked differences between the quenched and dynamical vacuum are found. 1 Present address: Institute for Theoretical Physics, Kanazawa University, Kanazawa 920-1192, Japan 2 Present address: Max-Plank-Institut fu?r Physik, D-80805 Mu?nchen, Germany Preprint submitted to Elsevier Science 1 Introduction The dynamics of the QCD vacuum, and color confinement in particular, becomes more transparent and amenable to quantitative investigation in the