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Methods of Ex Situ and In Situ Investigations of Structural Transformations: The Case of Crystallization of Metallic Glasses
Published on: June 7, 2018
Extraction of the Collins-Soper Kernel from a Joint Analysis of Experimental and Lattice Data
Artur Avkhadiev1,2, Valerio Bertone3, Chiara Bissolotti2
1Massachusetts Institute of Technology, Center for Theoretical Physics-A Leinweber Institute, Cambridge, Massachusetts 02139, USA.
Abstract:
We present a first joint extraction of the Collins-Soper kernel (CSK) combining experimental and lattice QCD data in the context of an analysis of transverse-momentum-dependent distributions (TMDs). Based on a neural-network parametrization, we perform a Bayesian reweighting of an existing fit of TMDs using lattice data, as well as a joint TMD fit to lattice and experimental data. We consistently find that the inclusion of lattice information shifts the central value of the CSK by approximately 10% and reduces its uncertainty by 40%-50%, highlighting the potential of lattice inputs to improve TMD extractions.
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