Three-jet event-shapes: first NLO+NLL+1/Q results
نویسنده
چکیده
Three-jet event-shape distributions can be exploited to investigate the dependence of hadronisation effects on the colour and the geometry of the underlying hard event. We present here the first comparison of data in ee annihilation and state-of-the-art theoretical predictions, including resummation of large logarithms at next-to-leading logarithmic accuracy matched to exact next-to-leading order and leading non-perturbative power corrections.
منابع مشابه
Measurement of event shapes in pp[over-bar] collisions at [sqrt]s=1.96TeV Citation
Citation T. Aaltonen et al. (CDF Collaboration). "Measurement of event shapes in pp[over-bar] collisions at [sqrt]s=1.96TeV." Phys. Rev. Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. The MIT Faculty has made this article openly available. Please share how this access benefits you...
متن کاملEffective Predictions of Event Shapes: Factorized, Resummed, and Gapped Angularity Distributions
Using soft-collinear effective theory (SCET), which provides a unified framework for factorization, resummation of logarithms, and incorporation of universal nonperturbative functions in hard-scattering QCD cross-sections, we present a new prediction of angularity distributions in e+e− annihilation. Angularities τa are an infinite class of event shapes which vary in their sensitivity to the sub...
متن کاملAutomated resummation of jet observables in QCD
Understanding the physics of event shapes and jet rates (collectively jet observables) requires a deep knowledge of QCD dynamics. Their distributions (defined as the fraction of events Σ(v) with the observable’s value V less than v) explore a wide range of physical scales, from the more inclusive region v = O(1), well described by fixed order perturbative (PT) calculations, to the extreme exclu...
متن کاملResummation and NLO Matching of Event Shapes with Effective Field Theory
The resummed differential thrust rate in e+e− annihilation is calculated using SoftCollinear Effective Theory (SCET). The resulting distribution in the two-jet region (T ∼ 1) is found to agree with the corresponding expression derived by the standard approach. A matching procedure to account for finite corrections at T < 1 is then described. There are two important advantages of the SCET approa...
متن کاملSummary of H1 Results on the Strong Coupling from Inclusive and Final States
The following selection of results does not aim for completeness, it emphasises the diversity of αS determinations published by the H1 Collaboration and highlights those which are the most precise and have the largest range in scale. A simultaneous determination of the gluon distribution and of the strong coupling αS(MZ) is obtained by combining lowx inclusive ep scattering data of H1 with μp s...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007