Precision studies of observables in pp→ W→ lν _{l} and pp→ γ, Z→ l ^{+} l ^{} processes at the LHC
(2017) In European Physical Journal C 77(5). Abstract
This report was prepared in the context of the LPCC Electroweak Precision Measurements at the LHC WG (https://lpcc.web.cern.ch/lpcc/index.php?page=electroweak_wg) and summarizes the activity of a subgroup dedicated to the systematic comparison of public Monte Carlo codes, which describe the Drell–Yan processes at hadron colliders, in particular at the CERN Large Hadron Collider (LHC). This work represents an important step towards the definition of an accurate simulation framework necessary for very highprecision measurements of electroweak (EW) observables such as the W boson mass and the weak mixing angle. All the codes considered in this report share at least nexttoleadingorder (NLO) accuracy in the prediction of the total cross... (More)
This report was prepared in the context of the LPCC Electroweak Precision Measurements at the LHC WG (https://lpcc.web.cern.ch/lpcc/index.php?page=electroweak_wg) and summarizes the activity of a subgroup dedicated to the systematic comparison of public Monte Carlo codes, which describe the Drell–Yan processes at hadron colliders, in particular at the CERN Large Hadron Collider (LHC). This work represents an important step towards the definition of an accurate simulation framework necessary for very highprecision measurements of electroweak (EW) observables such as the W boson mass and the weak mixing angle. All the codes considered in this report share at least nexttoleadingorder (NLO) accuracy in the prediction of the total cross sections in an expansion either in the strong or in the EW coupling constant. The NLO fixedorder predictions have been scrutinized at the technical level, using exactly the same inputs, setup and perturbative accuracy, in order to quantify the level of agreement of different implementations of the same calculation. A dedicated comparison, again at the technical level, of three codes that reach nexttonexttoleadingorder (NNLO) accuracy in quantum chromodynamics (QCD) for the total cross section has also been performed. These fixedorder results are a welldefined reference that allows a classification of the impact of higherorder sets of radiative corrections. Several examples of higherorder effects due to the strong or the EW interaction are discussed in this common framework. Also the combination of QCD and EW corrections is discussed, together with the ambiguities that affect the final result, due to the choice of a specific combination recipe. All the codes considered in this report have been run by the respective authors, and the results presented here constitute a benchmark that should be always checked/reproduced before any highprecision analysis is conducted based on these codes. In order to simplify these benchmarking procedures, the codes used in this report, together with the relevant input files and running instructions, can be found in a repository at https://twiki.cern.ch/twiki/bin/view/Main/DrellYanComparison.
(Less)
 author
 publishing date
 20170501
 type
 Contribution to journal
 publication status
 published
 subject
 in
 European Physical Journal C
 volume
 77
 issue
 5
 article number
 280
 publisher
 Springer
 external identifiers

 scopus:85019020576
 ISSN
 14346044
 DOI
 10.1140/epjc/s1005201748327
 language
 English
 LU publication?
 no
 id
 f3eae11a98274871baecd71e90457b8f
 date added to LUP
 20190516 13:34:05
 date last changed
 20231003 11:43:11
@article{f3eae11a98274871baecd71e90457b8f, abstract = {{<p>This report was prepared in the context of the LPCC Electroweak Precision Measurements at the LHC WG (https://lpcc.web.cern.ch/lpcc/index.php?page=electroweak_wg) and summarizes the activity of a subgroup dedicated to the systematic comparison of public Monte Carlo codes, which describe the Drell–Yan processes at hadron colliders, in particular at the CERN Large Hadron Collider (LHC). This work represents an important step towards the definition of an accurate simulation framework necessary for very highprecision measurements of electroweak (EW) observables such as the W boson mass and the weak mixing angle. All the codes considered in this report share at least nexttoleadingorder (NLO) accuracy in the prediction of the total cross sections in an expansion either in the strong or in the EW coupling constant. The NLO fixedorder predictions have been scrutinized at the technical level, using exactly the same inputs, setup and perturbative accuracy, in order to quantify the level of agreement of different implementations of the same calculation. A dedicated comparison, again at the technical level, of three codes that reach nexttonexttoleadingorder (NNLO) accuracy in quantum chromodynamics (QCD) for the total cross section has also been performed. These fixedorder results are a welldefined reference that allows a classification of the impact of higherorder sets of radiative corrections. Several examples of higherorder effects due to the strong or the EW interaction are discussed in this common framework. Also the combination of QCD and EW corrections is discussed, together with the ambiguities that affect the final result, due to the choice of a specific combination recipe. All the codes considered in this report have been run by the respective authors, and the results presented here constitute a benchmark that should be always checked/reproduced before any highprecision analysis is conducted based on these codes. In order to simplify these benchmarking procedures, the codes used in this report, together with the relevant input files and running instructions, can be found in a repository at https://twiki.cern.ch/twiki/bin/view/Main/DrellYanComparison.</p>}}, author = {{Alioli, S. and Arbuzov, A. B. and Bardin, D. Yu and Barzè, L. and Bernaciak, C. and Bondarenko, S. G. and Carloni Calame, C. M. and Chiesa, M. and Dittmaier, S. and Ferrera, G. and de Florian, D. and Grazzini, M. and Höche, S. and Huss, A. and Jadach, S. and Kalinovskaya, L. V. and Karlberg, A. and Krauss, F. and Li, Y. and Martinez, H. and Montagna, G. and Mück, A. and Nason, P. and Nicrosini, O. and Petriello, F. and Piccinini, F. and Płaczek, W. and Prestel, S. and Re, E. and Sapronov, A. A. and Schönherr, M. and Schwinn, C. and Vicini, A. and Wackeroth, D. and Was, Z. and Zanderighi, G.}}, issn = {{14346044}}, language = {{eng}}, month = {{05}}, number = {{5}}, publisher = {{Springer}}, series = {{European Physical Journal C}}, title = {{Precision studies of observables in pp→ W→ lν <sub>l</sub> and pp→ γ, Z→ l <sup>+</sup> l <sup></sup> processes at the LHC}}, url = {{http://dx.doi.org/10.1140/epjc/s1005201748327}}, doi = {{10.1140/epjc/s1005201748327}}, volume = {{77}}, year = {{2017}}, }