Dimopoulos, P.; Helmes, C.; Jost, C.; Knippschild, B.; Kostrzewa, B.; Liu, L.; Ottnad, K.; Petschlies, M.; Urbach, C.; Wenger, Urs; Werner, M. (2019). Topological susceptibility and η′ meson mass from Nf = 2 lattice QCD at the physical point. Physical review. D - particles, fields, gravitation, and cosmology, 99(3) American Physical Society 10.1103/PhysRevD.99.034511
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In this paper we explore the computation of topological susceptibility and η' meson mass in Nf = 2 flavor QCD using lattice techniques with a physical value of the pion mass as well as larger pion mass values. We observe that the physical point can be reached without a significant increase in the statistical noise. The mass of the η' meson can be obtained from both fermionic two point functions and topological charge density correlation functions, giving compatible results. With the pion mass dependence of the η' mass being flat we arrive at Mη' = 772(18) MeV without an explicit continuum limit. For the topological susceptibility we observe a linear dependence on M²π, however, with an additional constant stemming from lattice artifacts.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
08 Faculty of Science > Institute of Theoretical Physics |
UniBE Contributor: |
Wenger, Urs |
Subjects: |
500 Science > 530 Physics |
ISSN: |
1550-7998 |
Publisher: |
American Physical Society |
Language: |
English |
Submitter: |
Esther Fiechter |
Date Deposited: |
13 May 2019 12:14 |
Last Modified: |
05 Dec 2022 15:27 |
Publisher DOI: |
10.1103/PhysRevD.99.034511 |
ArXiv ID: |
1812.08787 |
BORIS DOI: |
10.7892/boris.127960 |
URI: |
https://boris.unibe.ch/id/eprint/127960 |
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