Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD

Dick V, Karsch F, Laermann E, Mukherjee S, Sharma S (2015)
Physical Review D 91(9): 094504.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
Download
Es wurden keine Dateien hochgeladen. Nur Publikationsnachweis!
Autor*in
Dick, ViktorUniBi; Karsch, FrithjofUniBi; Laermann, EdwinUniBi; Mukherjee, Swagato; Sharma, Sayantan
Abstract / Bemerkung
We investigate the low-lying eigenmodes of the Dirac matrix with the aim to gain more insight into the temperature dependence of the anomalous U-A(1) symmetry in QCD. We use the overlap operator to probe dynamical QCD configurations generated with (2 + 1)-flavors of highly improved staggered quarks. We find no evidence of a gap opening up in the infrared region of the eigenvalue spectrum even at 1.5T(c), T-c being the chiral crossover temperature. Instead, we observe an accumulation of near-zero eigenmodes. We argue that these near-zero eigenmodes are primarily responsible for the anomalous breaking of the axial symmetry still being effective. At 1.5T(c), these near-zero eigenmodes remain localized and their distribution is consistent with the dilute instanton gas picture. At this temperature, the average size of the instantons is 0.223(8) fm and their density is 0.147(7) fm(-4).
Erscheinungsjahr
2015
Zeitschriftentitel
Physical Review D
Band
91
Ausgabe
9
Art.-Nr.
094504
ISSN
1550-7998
Page URI
https://pub.uni-bielefeld.de/record/2758220

Zitieren

Dick V, Karsch F, Laermann E, Mukherjee S, Sharma S. Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD. Physical Review D. 2015;91(9): 094504.
Dick, V., Karsch, F., Laermann, E., Mukherjee, S., & Sharma, S. (2015). Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD. Physical Review D, 91(9), 094504. doi:10.1103/PhysRevD.91.094504
Dick, Viktor, Karsch, Frithjof, Laermann, Edwin, Mukherjee, Swagato, and Sharma, Sayantan. 2015. “Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD”. Physical Review D 91 (9): 094504.
Dick, V., Karsch, F., Laermann, E., Mukherjee, S., and Sharma, S. (2015). Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD. Physical Review D 91:094504.
Dick, V., et al., 2015. Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD. Physical Review D, 91(9): 094504.
V. Dick, et al., “Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD”, Physical Review D, vol. 91, 2015, : 094504.
Dick, V., Karsch, F., Laermann, E., Mukherjee, S., Sharma, S.: Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD. Physical Review D. 91, : 094504 (2015).
Dick, Viktor, Karsch, Frithjof, Laermann, Edwin, Mukherjee, Swagato, and Sharma, Sayantan. “Microscopic origin of U-A(1) symmetry violation in the high temperature phase of QCD”. Physical Review D 91.9 (2015): 094504.
Export

Markieren/ Markierung löschen
Markierte Publikationen

Open Data PUB

Web of Science

Dieser Datensatz im Web of Science®
Quellen

arXiv: 1502.06190

Inspire: 1345831

Suchen in

Google Scholar