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  • Accepted Manuscript: Momentum conservation and unitarity in parton showers and NLL resummation

Title: Momentum conservation and unitarity in parton showers and NLL resummation

We present a systematic study of differences between NLL resummation and parton showers. We first construct a Markovian Monte-Carlo algorithm for resummation of additive observables in electron-positron annihilation. Approximations intrinsic to the pure NLL result are then removed, in order to obtain a traditional, momentum and probability conserving parton shower based on the coherent branching formalism. The impact of each approximation is studied, and an overall comparison is made between the parton shower and pure NLL resummation. Differences compared to modern parton-shower algorithms formulated in terms of color dipoles are analyzed.
Authors:
ORCiD logo [1] ;  [2] ;  [2]
+ Show Author Affiliations
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. TU Dresden (Germany). Inst. of Nuclear and Particle Physics
Publication Date:
Grant/Contract Number:
AC02-76SF00515; SI 2009/1-1
Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 1; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Research Org:
SLAC National Accelerator Lab., Menlo Park, CA (United States); TU Dresden (Germany)
Sponsoring Org:
USDOE; German Academic Exchange Service (DAAD); German Research Foundation (DFG)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; QCD phenomenology
OSTI Identifier:
1425581