lattice computation
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Author(s):  
Yogachandran Rahulamathavan ◽  
Safak Dogan ◽  
Xiyu Shi ◽  
Rongxing Lu ◽  
Muttukrishnan Rajarajan ◽  
...  




2019 ◽  
Author(s):  
Paulo Silva ◽  
Attilio Cucchieri ◽  
David Dudal ◽  
Tereza Mendes ◽  
Orlando Oliveira ◽  
...  


2019 ◽  
Vol 99 (3) ◽  
Author(s):  
S. Basak ◽  
A. Bazavov ◽  
C. Bernard ◽  
C. DeTar ◽  
L. Levkova ◽  
...  
Keyword(s):  


2018 ◽  
Vol 98 (1) ◽  
Author(s):  
Katsumasa Nakayama ◽  
Hidenori Fukaya ◽  
Shoji Hashimoto


2018 ◽  
Vol 175 ◽  
pp. 07038 ◽  
Author(s):  
Paulo J. Silva ◽  
Orlando Oliveira ◽  
David Dudal ◽  
Martin Roelfs

We report on the lattice computation of the Landau gauge gluon propagator at finite temperature, including the non-zero Matsubara frequencies. Moreover, the corresponding Källén-Lehmann spectral density is computed, using a Tikhonov regularisation together with the Morozov discrepancy principle. Implications for gluon confinement are also discussed.



2018 ◽  
Vol 175 ◽  
pp. 11005 ◽  
Author(s):  
Marco Cè ◽  
Leonardo Giusti ◽  
Stefan Schaefer

We discuss the recently proposed multiboson domain-decomposed factorization of the gauge-field dependence of the fermion determinant in lattice QCD. In particular, we focus on the case of a lattice divided in an arbitrary number of thick time slices. As a consequence, multiple space-time regions can be updated independently. This allows to address the exponential degradation of the signal-to-noise ration of correlation functions with multilevel Monte Carlo sampling. We show numerical evidence of the effectiveness of a two-level integration for pseudoscalar propagators with momentum and for vector propagators, in a two active regions setup. These results are relevant to lattice computation of the hadronic contributions to the anomalous magnetic moment of the muon and to heavy meson decay form factors.



2018 ◽  
Vol 175 ◽  
pp. 06020
Author(s):  
Taku Izubuchi ◽  
Yoshinobu Kuramashi ◽  
Christoph Lehner ◽  
Eigo Shintani

We study the finite volume effect of the hadronic vacuum polarization contribution to muon g-2, [see formula in PDF],in lattice QCD by comparison with two different volumes, L4 = (5.4)4 and (8.1)4 fm4, at physical pion. We perform the lattice computation of highly precise vector-vector current correlator with optimized AMA technique on Nf = 2 + 1 PACS gauge configurations in Wilson-clover fermion and stout smeared gluon action at one lattice cut-off, a−1 = 2.33 GeV. We compare two integrals of [see formula in PDF], momentum integral and time-slice summation, on the lattice and numerically show that the different size of finite volume effect appears between two methods. We also discuss the effect of backward-state propagation into the result of [see formula in PDF] with the different boundary condition. Our model-independent study suggest that the lattice computation at physical pion is important for correct estimate of finite volume and other lattice systematics in [see formula in PDF].





2017 ◽  
Vol 96 (1) ◽  
Author(s):  
Yasumichi Aoki ◽  
Taku Izubuchi ◽  
Eigo Shintani ◽  
Amarjit Soni


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