Work

Quark spin effects in e + e − annihilation: A Monte Carlo event generator study

Year: 2024

Type: article

Abstract: Quark spin effects in e + e − annihilation to pseudoscalar and vector mesons are implemented for the first time in the Monte Carlo event generator. The spin-dependent fragmentation of the string stretched between the produced quark-antiquark pair with correlated spin states is described by the string + P 3 0 model implemented in the string fragmentation routine of by using the package. The simulated events are used to study the model predictions for the Collins asymmetries of mesons produced back-to-back in the e + e − center of mass system by using both the thrust axis method and the hadronic plane method. The obtained asymmetries are compared to the available data from the BELLE and experiments and the underlying Collins analyzing power from the string + P 3 0 model is compared with phenomenological extractions. Published by the American Physical Society 2024

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.110.074029

Authors: A. Kerbizi, L. Lönnblad, A. Martin

Institutions: University of Trieste, Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, Lund University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Vetenskapsrådet, Università degli Studi di Trieste, Ministero dell'Università e della Ricerca, Horizon 2020 Framework Programme

Awards: G1759132840, G1988936039, Development of Event Generators for Heavy Ion Collisions, G8137647930