625 citations
- Institute for Research in Fundamental SciencesIR15 papers
- Leibniz University HannoverDE12 papers
- Yazd UniversityIR9 papers
- Tongji UniversityCN7 papers
- Semnan UniversityIR6 papers
- Shiraz UniversityIR5 papers
- Farhangian UniversityIR4 papers
- Shahid Beheshti UniversityIR4 papers
- Ferdowsi University of MashhadIR3 papers
- Skolkovo Institute of Science and TechnologyRU3 papers
- University of AveiroPT3 papers
- Centre National de la Recherche ScientifiqueFR2 papers
71 papers
Restricted nonlinear shrinkage of high-dimensional residual covariance matrices in multivariate regressions
Hamid Karamikabir, Mohammad Arashi
We study estimation of the p*p residual scatter (shape) matrix in a high-dimensional multivariate linear regression, where p and n grow proportionally. When the coefficient matrix…
Mens: Nonlinear shrinkage estimation in nonparanormal models for financial applications
Hamid Karamikabir, Mohammad Arashi
We develop a theory of nonlinear shrinkage covariance estimation for nonparanormal (Gaussian-copula) models, in which each observed coordinate is an unknown strictly increasing tra…
New analysis for Nucleon Form Factors from GPDs
Fatemeh Arbabifar, Nader Morshedian, Shahin Atashbar Tehrani
Generalized Parton Distributions (GPDs) provide a comprehensive framework for describing the three-dimensional structure of the nucleon. Extracting GPDs from experimental data requ…
Organisational accounts engaged in scholarly communication on Twitter: Patterns of presence, activity and engagement
Zohreh Zahedi, Yanqing Zhang, Zekun Han +2
Organisational accounts are an integral part of the Twitter (now X) ecosystem. This study identified 9,842 research- and policy-related organisational accounts that had tweeted abo…
Nucleon Form Factors from GPDs
Leila Ghasemzadeh, Pegah Sartipi YarAahmadi, Fatemeh Arbabifar +2
In this study, we introduce a novel ansatz for Generalized Parton Distributions (GPDs), named GSAMA24. This ansatz aims to provide a more accurate and comprehensive description of…
AAK24: Global QCD analysis on polarized parton distribution in the presence of asymmetry measurements
Fatemeh Arbabifar, Shahin Atashbar Tehrani, Hamzeh Khanpour
This article introduces {\tt AAK24}, a Next-to-Leading Order (NLO) QCD analysis of polarized data from both polarized Deep Inelastic Scattering (DIS) and Semi-Inclusive Deep Inelas…