Quantifying correlated truncation errors in effective field theory
Quantifying correlated truncation errors in effective field theory
复制标题
量化有效场理论中的相关截断误差
DOI:
10.1103/physrevc.100.044001
复制
发表时间:
2019
影响因子:
3.1
通讯作者:
Wesolowski, S.
中科院分区:
文献类型:
--
作者:
Melendez, J. A.;Furnstahl, R. J.;Phillips, D. R.;Pratola, M. T.;Wesolowski, S.
Effective field theories (EFTs) organize the description of complex systems into an infinite sequence of decreasing importance. Predictions are made with a finite number of terms, which induces a truncation error that is often left unquantified. We formalize the notion of EFT convergence and propose a Bayesian truncation error model for predictions that are correlated across the independent variables, e.g., energy or scattering angle. Central to our approach are Gaussian processes that encode both the naturalness and correlation structure of EFT coefficients. Our use of Gaussian processes permits efficient and accurate assessment of credible intervals, allows EFT fits to easily include correlated theory errors, and provides analytic posteriors for physical EFT-related quantities such as the expansion parameter. We demonstrate that model-checking diagnostics—applied to the case of multiple curves—are powerful tools for EFT validation. As an example, we assess a set of nucleon-nucleon scattering observables in chiral EFT. In an effort to be self-contained, appendices include thorough derivations of our statistical results. Our methods are packaged in Python code, calledgsum, that is available for download on GitHub.
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影响因子:
5.4
作者:
M. Cacciari;Nicolas Houdeau
通讯作者:
Nicolas Houdeau
影响因子:
2.5
作者:
Bastos, Leonardo S.;O'Hagan, Anthony
通讯作者:
O'Hagan, Anthony
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
M. Kölliker;M. Vancassel
通讯作者:
M. Vancassel
影响因子:
8.6
作者:
Epelbaum, E.;Krebs, H.;Meissner, U. -G.
通讯作者:
Meissner, U. -G.