Asymptotcity of QCD and massive, oriented event-shapes

• Autores: Néstor González Gracia
• Directores de la Tesis: Vicent Mateu Barreda (dir. tes.)
• Lectura: En la Universidad de Salamanca ( España ) en 2022
• Idioma: inglés
• Tribunal Calificador de la Tesis: David Rodríguez Entem (presid.), Siannah Peñaranda Rivas (secret.), Bahman Dehnadi (voc.)
• Programa de doctorado: Programa de Doctorado en Física Fundamental y Matemáticas por la Universidad de Salamanca
• Materias:
  • Matemáticas
    • Análisis y análisis funcional
      • Series, sumabilidad
  • Física
    • Nucleónica
      • Física de partículas
    • Física teórica
• Enlaces
  • Tesis en acceso abierto en: TESEO
• Resumen

  • The study of the large order behavior of infinite power series in QCD, which are the fundamental objects in perturbation theory, is adressed in the context of the large-b0 limit. A systematic formalism to extract closed expressions and renormalons is developed for regular series and extended to series with cusp anomalous dimension for the first time. A number of applications, such as short-distance mass-schemes and SCET and bHQET factorization theorems for dijets are considered in detail. The problem of asymptotic separation in the tau spectral moments is studied for the gluon-condensate Borel model, and the differences between the FOPT (convergent) and CIPT (divergent) schemes are clearly stablished. The fixed-order NLO computation of the event-shape distribution of e^+e^ to hadrons is presented for massive event-shapes and with explicit orientation of the thrust axis.