## Magnetic susceptibility of QCD at zero and at finite temperature from the lattice

Bali GS, Bruckmann F, Constantinou M, Costa M, Endrödi G, Katz SD, Panagopoulos H, Schäfer A (2012)
Physical Review D 86(9): 094512.

Zeitschriftenaufsatz | Veröffentlicht | Englisch

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Autor*in
Bali, G. S.; Bruckmann, F.; Constantinou, M.; Costa, M.; Endrödi, GergelyUniBi; Katz, S. D.; Panagopoulos, H.; Schäfer, A.
Abstract / Bemerkung
The response of the QCD vacuum to a constant external (electro)magnetic field is studied through the tensor polarization of the chiral condensate and the magnetic susceptibility at zero and at finite temperature. We determine these quantities using lattice configurations generated with the tree-level Symanzik improved gauge action and Nf=1+1+1 flavors of stout smeared staggered quarks with physical masses. We carry out the renormalization of the observables under study and perform the continuum limit both at T>0 and at T=0, using different lattice spacings. Finite size effects are studied by using various spatial lattice volumes. The magnetic susceptibilities χf reveal a spin-diamagnetic behavior; we obtain at zero temperature χu=−(2.08±0.08)  GeV−2, χd=−(2.02±0.09)  GeV−2 and χs=−(3.4±1.4)  GeV−2 for the up, down and strange quarks, respectively, in the ¯¯¯¯¯¯MS scheme at a renormalization scale of 2 GeV. We also find the polarization to change smoothly with the temperature in the confinement phase and then to drastically reduce around the transition region.
Erscheinungsjahr
2012
Zeitschriftentitel
Physical Review D
Band
86
Ausgabe
9
Art.-Nr.
094512
ISSN
1550-7998
eISSN
1550-2368
Page URI
https://pub.uni-bielefeld.de/record/2955760

## Zitieren

Bali GS, Bruckmann F, Constantinou M, et al. Magnetic susceptibility of QCD at zero and at finite temperature from the lattice. Physical Review D. 2012;86(9): 094512.
Bali, G. S., Bruckmann, F., Constantinou, M., Costa, M., Endrödi, G., Katz, S. D., Panagopoulos, H., et al. (2012). Magnetic susceptibility of QCD at zero and at finite temperature from the lattice. Physical Review D, 86(9), 094512. https://doi.org/10.1103/PhysRevD.86.094512
Bali, G. S., Bruckmann, F., Constantinou, M., Costa, M., Endrödi, Gergely, Katz, S. D., Panagopoulos, H., and Schäfer, A. 2012. “Magnetic susceptibility of QCD at zero and at finite temperature from the lattice”. Physical Review D 86 (9): 094512.
Bali, G. S., Bruckmann, F., Constantinou, M., Costa, M., Endrödi, G., Katz, S. D., Panagopoulos, H., and Schäfer, A. (2012). Magnetic susceptibility of QCD at zero and at finite temperature from the lattice. Physical Review D 86:094512.
Bali, G.S., et al., 2012. Magnetic susceptibility of QCD at zero and at finite temperature from the lattice. Physical Review D, 86(9): 094512.
G.S. Bali, et al., “Magnetic susceptibility of QCD at zero and at finite temperature from the lattice”, Physical Review D, vol. 86, 2012, : 094512.
Bali, G.S., Bruckmann, F., Constantinou, M., Costa, M., Endrödi, G., Katz, S.D., Panagopoulos, H., Schäfer, A.: Magnetic susceptibility of QCD at zero and at finite temperature from the lattice. Physical Review D. 86, : 094512 (2012).
Bali, G. S., Bruckmann, F., Constantinou, M., Costa, M., Endrödi, Gergely, Katz, S. D., Panagopoulos, H., and Schäfer, A. “Magnetic susceptibility of QCD at zero and at finite temperature from the lattice”. Physical Review D 86.9 (2012): 094512.
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