A stochastic approach to the reconstruction of spectral functions in lattice QCD
| Autor: | Hiroshi Ohno, Olaf Kaczmarek, Heng-Tong Ding, Hai-Tao Shu, Swagata Mukherjee |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Quantum chromodynamics Nuclear Theory Lattice field theory High Energy Physics - Lattice (hep-lat) Parameterized complexity FOS: Physical sciences Lattice QCD Spectral line Nuclear Theory (nucl-th) High Energy Physics - Lattice Lattice (order) Euclidean geometry Stochastic optimization Statistical physics |
| Zdroj: | Scopus-Elsevier |
| DOI: | 10.48550/arxiv.1510.02901 |
| Popis: | We present a Stochastic Optimization Method (SOM) for the reconstruction of the spectral functions (SPFs) from Euclidean correlation functions. In this approach the SPF is parameterized as a sum of randomly distributed boxes. By varying the width, location and height of the boxes stochastically an optimal SPF can be obtained. Using this approach we reproduce mock SPFs fairly well, which contain sharp resonance peaks, transport peaks and continuum spectra. We also analyzed the charmonium correlators obtained from $N_{\tau}$=96, 48, 32 lattices using SOM and found similar conclusion on the dissociation temperatures of charmonium ground states as that obtained using the Maximum Entropy Method. Comment: Proceedings of the 33rd International Symposium on Lattice Field Theory, Kobe, Japan |
| Databáze: | OpenAIRE |
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