Report/Journal Article

PUBDB-2018-01671

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Fully-differential top-pair production at a lepton collider: from threshold to continuum

Bach, F.DESY* ; Nejad, B. C. ; Hoang, A. H. ; Kilian, W. ; Reuter, J. (Corresponding author)DESY* ; Stahlhofen, M.DESY* ; Teubner, T. ; Weiss, C.

2018
Springer Berlin

This record in other databases:        

Please use a persistent id in citations: doi:10.1007/JHEP03(2018)184  doi:10.3204/PUBDB-2018-01671

Report No.: DESY-17-158; LTH-1143; MITP-17-077; SI-HEP-2017-20; UWTHPH2017-35; arXiv:1712.02220

Abstract: We present an approach to predict exclusive $W^+bW^-\bar{b}$ production at lepton colliders that correctly describes the top-anti-top threshold as well as the continuum region. We incorporate $t\bar{t}$ form factors for the NLL threshold resummation derived in NRQCD into a factorized relativistic cross section using an extended double-pole approximation, which accounts for fixed-order QCD corrections to the top decays at NLO. This is combined with the full fixed-order QCD result at NLO for $W^+bW^-\bar{b}$ production to obtain predictions that are not only valid at threshold but smoothly transition to the continuum region. Our implementation is based on the Monte Carlo event generator WHIZARD and the code TOPPIK and allows to compute fully-differential threshold-resummed cross sections including the interference with non-resonant background processes. For the first time it is now possible to systematically study general differential observables at future lepton colliders involving the decay products of the top quarks at energies close to the pair production threshold and beyond.

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Contributing Institute(s):

1. Theorie-Gruppe (T)

Research Program(s):

1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2018

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Database coverage:
; ; ; ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Preprint/Report Bach, F.DESY* ; Nejad, B. C.DESY* ; Hoang, A. ; Kilian, W. ; Reuter, J. (Corresponding author)DESY* ; Stahlhofen, M. ; Teubner, T. ; Weiss, C.
Fully-differential Top-Pair Production at a Lepton Collider: From Threshold to Continuum
[10.3204/PUBDB-2017-13409]     Files  Fulltext by arXiv.org Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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