PERTURBATIVE EXPANSION OF τ HADRONIC SPECTRAL FUNCTION MOMENTS
نویسندگان
چکیده
منابع مشابه
Spectral Functions from Hadronic τ Decays and QCD
Hadronic decays of the τ lepton provide a clean environment to study hadron dynamics in an energy regime dominated by resonances, with the interesting information captured in the spectral functions. Recent results from ALEPH on exclusive channels are presented, with some emphasis on the ππ final state which plays a crucial role for the determination of the hadronic contribution to the muon anom...
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Elvira Gámiz, Matthias Jamin, Antonio Pich, Joaquim Prades and Felix Schwab a Department of Physics & Astronomy, University of Glasgow Glasgow G12 8QQ, United Kingdom. b ICREA and IFAE, Universitat Autònoma de Barcelona E-08193 Bellaterra, Barcelona, Spain. c Departament de F́ısica Teòrica, IFIC, Universitat de València–CSIC Apt. de Correus 22085, E-46071 València, Spain. d Centro Andaluz de F́ıs...
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|Vub| is notoriously hard to measure model-independently. The first extraction of |Vub| from experimental data relied on a study of the lepton energy spectrum in inclusive charmless semileptonic B decay [ 1], a region in which (as will be discussed) the rate is highly model-dependent. |Vub| has also been measured from exclusive semileptonic B → ρlν̄ and B → πlν̄ decay [ 2]. These exclusive determ...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics: Conference Series
سال: 2014
ISSN: 2010-1945,2010-1945
DOI: 10.1142/s2010194514604426