StringSpinner - adding spin to the PYTHIA string fragmentation

A. Kerbizi

doi:10.1016/j.cpc.2021.108234

2022-03-01

A. Kerbizi *

Leif Lönnblad

DOI：10.1016/j.cpc.2021.108234

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摘要

En 中文

StringSpinner is a plugin allowing for the introduction of spin effects in the hadronization part of the PYTHIA 8 event generator. In this first version the implementation is limited to handling pesudoscalar mesons in events without parton showers. The spin effects are generated by propagating the quark polarization along the fragmentation chain according to the rules of the quantum mechanical string+(3) P-0 model. By using parametrizations for the transversity parton distribution functions, StringSpinner allows to simulate the polarized semi inclusive deep inelastic scattering process on protons and neutrons. The instructions to use StringSpinner and to modify the parametrizations of the transversity distribution functions are presented, as well as an example of the calculation of the Collins asymmetries as obtained from simulations of the transversely polarized semi inclusive deep inelastic scattering process. (C) 2021 Elsevier B.V. All rights reserved.

Keyword:

SIDIS

Spin

String+3P0

Transversity

Hadronization

Pythia

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期刊

Computer Physics Communications

IF:

3.4

论文数:

1.2W

被引数:

3.7W

机构

istituto nazionale di fisica nucleare (infn)

学者数:

3.0W

论文数: 1.2W

被引数: 14

University of Trieste

学者数:

1.3W

论文数: 1.1W

被引数: 1.2W

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