Matthias Jamin: A novel QCD coupling

Europe/Madrid
Seminar (IFAE)

Seminar

IFAE

Jelena Aleksic (IFAE), Joern Lange (IFAE Barcelona), John E Ward (IFAE)
Description
The Quantum Chromodynamics (QCD) coupling, α_s, is not a physical observable of the theory since it depends on conventions related to the renormalization procedure. We introduce a definition of the QCD coupling, denoted by α^_s, whose running is explicitly renormalization scheme invariant. The scheme dependence of the new coupling α^_s is parameterized by a single parameter C, related to transformations of the QCD scale Λ. It is demonstrated that appropriate choices of C can lead to substantial improvements in the perturbative prediction of physical observables. As phenomenological applications, we study e+e− scattering and decays of the τ lepton into hadrons, both being governed by the QCD Adler function, as well as the scalar correlation function.
Participants
  • Alícia Labián
  • Antonio Pineda
  • Armand Quispe
  • Bruno Bourguille
  • Chihaya Anzai
  • Dirk Hornung
  • Eduard Masso
  • Emanuele Cavallaro
  • Enrique Fernandez
  • Eric Peregrina
  • Fabian Foerster
  • Federico Sanchez
  • Giuliano Panico
  • Imma Riu
  • Ivan Lopez Paz
  • JLF Barbón
  • JR Espinosa
  • Lluïsa-Maria Mir
  • Marc Granado
  • Mari Manna
  • Martine Bosman
  • Matteo Cavalli-Sforza
  • Mirko Casolino
  • Oscar Martínez
  • Rafel Escribano
  • Ramon Miquel
  • Rudin Petrossian-Byrne
  • Sara Strauch
  • Sebastián Grinschpun
  • Thorsten Lux
  • victor cancer
    • 13:00 13:05
      Introduction and General Announcements 5m
      Speakers: Joern Lange (IFAE Barcelona), Dr John E Ward (IFAE), Dr Stefano Terzo (IFAE)
    • 13:05 13:25
      Presentation of the Week 20m
      Speaker: Prof. Matthias Jamin (ICREA & IFAE)
    • 13:25 13:35
      Discussion 10m
    • 13:35 14:00
      Pizza 25m
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