• Open Access

Recursive model for the fragmentation of polarized quarks

A. Kerbizi, X. Artru, Z. Belghobsi, F. Bradamante, and A. Martin
Phys. Rev. D 97, 074010 – Published 12 April 2018

Abstract

We present a model for Monte Carlo simulation of the fragmentation of a polarized quark. The model is based on string dynamics and the P30 mechanism of quark pair creation at string breaking. The fragmentation is treated as a recursive process, where the splitting function of the subprocess qh+q depends on the spin density matrix of the quark q. The P30 mechanism is parametrized by a complex mass parameter μ, the imaginary part of which is responsible for single spin asymmetries. The model has been implemented in a Monte Carlo program to simulate jets made of pseudoscalar mesons. Results for single hadron and hadron pair transverse-spin asymmetries are found to be in agreement with experimental data from SIDIS and e+e annihilation. The model predictions on the jet-handedness are also discussed.

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  • Received 13 February 2018

DOI:https://doi.org/10.1103/PhysRevD.97.074010

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Particles & Fields

Authors & Affiliations

A. Kerbizi1, X. Artru2, Z. Belghobsi3, F. Bradamante1, and A. Martin1

  • 1INFN Sezione di Trieste and Dipartimento di Fisica, Università degli Studi di Trieste, Via Valerio 2, 34127 Trieste, Italy
  • 2University of Lyon, Université Lyon 1, CNRS, Institut de Physique Nucléaire de Lyon, 69622 Villeurbanne, France
  • 3Laboratoire de Physique Théorique, Faculté des Sciences Exactes et de l’Informatique, Université Mohammed Seddik Ben Yahia, B.P. 98 Ouled Aissa, 18000 Jijel, Algeria

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Issue

Vol. 97, Iss. 7 — 1 April 2018

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