The complex-mass scheme for perturbative calculations with unstable particles
By Ansgar Denner, Stefan Dittmaier. 2006
238 citations recorded by the source corpus.
Perturbative calculations with unstable particles require the inclusion of their finite decay widths. A convenient, universal scheme for this purpose is the complex-mass scheme. It fully respects gauge-invariance, is straight-forward to apply, and has been successfully used for the calculation of various tree-level processes and of the electroweak radiative corrections to e + e − → 4 f and H → 4 f .
Subfields: Artificial Intelligence, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/ac07d63ab53a473b4a7c81b88a31196ea6120473
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In Artificial Intelligence
- Cms Collaboration
- Atlas Collaboration
- Gudrun Heinrich
- Ansgar Denner
- Stefan Dittmaier
- Valentin Hirschi
- G. Soyez
- Pierpaolo Mastrolia
In Nuclear and High Energy Physics
- Atlas Collaboration
- Cms Collaboration
- Gudrun Heinrich
- Ansgar Denner
- Stefan Dittmaier
- M. Schönherr
- Fabio Maltoni
- M. Grazzini
Citations in the corpus
- Les Houches 2017: Physics at TeV Colliders Standard Model Working Group Report (2017, methodology): “Unstable particles are treated in the complex-mass scheme [483, 517, 541].”
- Vector-boson pair production at the LHC to O( 3 ) accuracy (2013, background): “(3.10) The second column shows the corresponding results evaluated in the complex-mass scheme (CMS) [69, 70] which involves complex couplings.”
- Electroweak corrections to dilepton + jet production at hadron colliders (2011, unknown): “[87].”
- Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, methodology): “In both CMS and ATLAS collaborations the Higgs bosonpT was reweighted event by event to match the NNLO+NNLLpT spectrum predicted by HqT. Higgs boson searches performed at8 TeV are using POWHEG where the dampening factorhfactwas tuned to reproduce HqT spectrum, therefore no reweighting was needed.”
- Automated event generation for loop-induced processes (2015, background): “To avoid this issue, we considered here a non-zero top quark width within the complex mass scheme [43, 44], but keeping the weak boson widths set to zero since they are onshell in the external states.”
- The Higgs-boson lineshape☆ (2011, methodology): “f the four-momentum pµ satisfying the condition p2 = −µ2 +iµγ. For a discussion on violation of the spectral condition we refer to Ref. [39]. Consider the complex mass scheme (CMS) introduced in Ref. [40,41] (see also Ref. [42]) and extended at two-loop level in Ref. [43]: here, at lowest level of a”
- Automation of one-loop QCD computations (2011, background): “In the case in which the relevant particles also enter in the loops, the use of non-zero widths is non trivial, and consistency dictates the use of a scheme like the complex-mass one [39].”
- Electroweak radiative corrections for collider physics (2019, background): “[58, 59, 634] all external particles are assumed to be stable.”
- Recursive generation of one-loop amplitudes in the Standard Model (2012, methodology): “To this end, we consistently use the complex-mass scheme [76, 77, 82] where μ(2)W and μ 2 Z are defined as the poles of the W- and Z-boson propagators in the complex plane.”