Autor(es)

da Silveira, Roberto Correa ; Serna, Fernando E. ; El-Bennich, Bruno

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW C; v. 111, n. 6, p. 8-pg., 2025-06-24.

Resumo

The elementary fragmentation function that describes the process q - pi is predicted by applying crossing and charge symmetry to the cut diagram of the pion valence quark distribution function. This elementary probability distribution defines the ladder-kernel of a quark jet fragmentation equation, which is solved self-consistently to obtain the full pion fragmentation function. The hadronization into a pion employs the complete Poincar & eacute; invariant Bethe-Salpeter wave function, though the overwhelming contribution to the fragmentation function is due to the leading Bethe-Salpeter amplitude. Compared to a Nambu-Jona-Lasinio model prediction, the fragmentation function we obtain is enhanced in the range z 0.8 but otherwise in good qualitative agreement. The full pion fragmentation function is overall greater than the elementary fragmentation function below z 0.6. (AU)

• Processo FAPESP: 23/00195-8 - A estrutura constituinte e a tomografia de hádrons
• Beneficiário: Bruno Omar El Bennich
• Modalidade de apoio: Auxílio à Pesquisa - Regular