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Herwig 7.3 Release Note
/ Bewick, Gavin (Durham U., IPPP) ; Ferrario Ravasio, Silvia (CERN) ; Gieseke, Stefan (KIT, Karlsruhe, TP) ; Kiebacher, Stefan (KIT, Karlsruhe, TP) ; Masouminia, Mohammad R. (Durham U., IPPP) ; Papaefstathiou, Andreas (Kennesaw State U.) ; Plätzer, Simon (Graz U.) ; Richardson, Peter (Durham U., IPPP) ; Samitz, Daniel (Stefan Meyer Inst. Subatomare Phys.) ; Seymour, Michael H. (Manchester U.) et al.
A new release of the Monte Carlo event generator Herwig (version 7.3) has been launched. This iteration encompasses several enhancements over its predecessor, version 7.2. [...]
arXiv:2312.05175; CERN-TH-2023-223; HERWIG-2023-01; KA-TP-28-2023; MCnet-23-19; IPPP/23/66.-
2024-10-14 - 10 p.
- Published in : Eur. Phys. J. C 84 (2024) 1053
Fulltext: 2312.05175 - PDF; document - PDF;
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Herwig 7.2 Release Note
/ Bellm, Johannes (Lund U.) ; Bewick, Gavin (Durham U., IPPP) ; Ferrario Ravasio, Silvia (Durham U., IPPP) ; Gieseke, Stefan (KIT, Karlsruhe, TP) ; Grellscheid, David (Bergen U.) ; Kirchgaeßer, Patrick (KIT, Karlsruhe, TP) ; Masouminia, Mohammad R. (Durham U., IPPP) ; Nail, Graeme (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Papaefstathiou, Andreas (U. Edinburgh, Higgs Ctr. Theor. Phys.) ; Platzer, Simon (Vienna U.) et al.
A new release of the Monte Carlo event generator Herwig (version 7.2) is now available. This version introduces a number of improvements, notably: improvements to the simulation of multiple-parton interactions, including diffractive processes; a new model for baryonic colour re-connection; spin correlations in both the dipole and angular-ordered parton showers; improvements to strangeness production; an improved choice of evolution variable in the angular-ordered parton shower; support for generic Lorentz structures in BSM models..
arXiv:1912.06509; MAN/HEP/2019/011; CERN-TH-2019-213; IFJPAN-IV-2019-18; HERWIG-2019-02; UWTHPH-19-36; KA-TP-24-2019; LU-TP 19-57; MCnet-19-28; IPPP/19/91.-
2020-05-20 - 7 p.
- Published in : Eur. Phys. J. C 80 (2020) 452
Article from SCOAP3: PDF; Fulltext: PDF;
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Parton Shower Uncertainties with Herwig 7: Benchmarks at Leading Order
/ Bellm, Johannes (Durham U., IPPP ; Durham U.) ; Nail, Graeme (Manchester U. ; Karlsruhe U., ITP) ; Plätzer, Simon (Durham U. ; Durham U., IPPP ; Manchester U.) ; Schichtel, Peter (Durham U., IPPP ; Durham U.) ; Siódmok, Andrzej (CERN ; Cracow, INP)
We perform a detailed study of the sources of perturbative uncertainty in parton shower predictions within the Herwig 7 event generator. We benchmark two rather different parton shower algorithms, based on angular-ordered and dipole-type evolution, against each other. [...]
arXiv:1605.01338; MAN-HEP-2016-06; CERN-TH-2016-093; HERWIG-2016-03; IFJPAN-IV-2016-7; MCNET-16-12; IPPP-16-34; KA-TP-12-2016; MAN-HEP-2016-06; CERN-TH-2016-093; HERWIG-2016-03; IFJPAN-IV-2016-7; KA-TP-12-2016; MCNET-16-12; IPPP-16-34.-
Geneva Geneva : CERN, CERN, 2016-12-02 - 18 p.
- Published in : Eur. Phys. J. C 76 (2016) 665
Article from SCOAP3: PDF; Fulltext: PDF;
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Spin Correlations in Parton Shower Simulations
/ Richardson, Peter (CERN ; Durham U., IPPP) ; Webster, Stephen (Durham U., IPPP)
Spin correlations are an important, but often neglected, effect in modern Monte Carlo event generators. We show that they can be fully incorporated in Herwig 7 using the algorithm originally proposed by Collins and Knowles in all stages of the event generation process and between the different stages of the event generation. [...]
arXiv:1807.01955; IPPP/18/55; CERN-TH-2018-154; IPPP-18-55; MCNET-18-12.-
2020-02-01 - 13 p.
- Published in : Eur. Phys. J. C 80 (2020) 83
Article from SCOAP3: PDF; Fulltext: PDF;
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Parton Shower and Matching Uncertainties in Top Quark Pair Production with Herwig 7
/ Cormier, Kyle (Toronto U.) ; Plätzer, Simon (Vienna U.) ; Reuschle, Christian (Florida State U. ; Lund U., Dept. Theor. Phys.) ; Richardson, Peter (CERN ; Durham U., IPPP) ; Webster, Stephen (Durham U., IPPP)
We evaluate the theoretical uncertainties in next-to-leading order plus parton shower predictions for top quark pair production and decay in hadronic collisions. Our work is carried out using the Herwig 7 event generator and presents an in-depth study of variations in matching schemes with two systematically different shower algorithms, the traditional angular-ordered and alternative dipole shower. [...]
arXiv:1810.06493; CERN-TH-2018-219; HERWIG-2018-03; IPPP-18-91; LU-TP-18-33; MCNET-18-28; IPPP/18/91; LU-TP 18-33,
MCNET-18-28; UWTHPH-2018-22.-
2019-11-12 - 36 p.
- Published in : Eur. Phys. J. C 79 (2019) 915
Article from SCOAP3: PDF; Fulltext: PDF;
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Logarithmic accuracy of parton showers: a fixed-order study
/ Dasgupta, Mrinal (Manchester U.) ; Dreyer, Frédéric A. (MIT, Cambridge, CTP) ; Hamilton, Keith (University Coll. London ; CERN) ; Monni, Pier Francesco (CERN) ; Salam, Gavin P. (CERN ; MIT)
We formulate some first fundamental elements of an approach for assessing the logarithmic accuracy of parton-shower algorithms based on two broad criteria: their ability to reproduce the singularity structure of multi-parton matrix elements, and their ability to reproduce logarithmic resummation results. We illustrate our approach by considering properties of two transverse momentum ordered final-state showers, examining features up to second order in the strong coupling. [...]
arXiv:1805.09327; CERN-TH-2018-113.-
2018-09-07 - 33 p.
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: arXiv:1805.09327 - PDF; 1805.09327 - PDF;
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Herwig 7.0 / Herwig++ 3.0 Release Note
/ Bellm, Johannes (KIT, Karlsruhe, TP ; Durham U., IPPP ; Durham U.) ; Gieseke, Stefan (KIT, Karlsruhe, TP) ; Grellscheid, David (Durham U., IPPP ; Durham U.) ; Plätzer, Simon (Durham U. ; Durham U., IPPP ; Manchester U.) ; Rauch, Michael (KIT, Karlsruhe, TP) ; Reuschle, Christian (KIT, Karlsruhe, TP ; Florida State U.) ; Richardson, Peter (Durham U., IPPP ; Durham U. ; CERN) ; Schichtel, Peter (Durham U. (main) ; Durham U., IPPP) ; Seymour, Michael H. (Manchester U.) ; Siódmok, Andrzej (CERN ; Cracow, INP) et al.
A major new release of the Monte Carlo event generator Herwig++ (version 3.0) is now available. This release marks the end of distinguishing Herwig++ and HERWIG development and therefore constitutes the first major release of version 7 of the Herwig event generator family. [...]
arXiv:1512.01178; CERN-PH-TH-2015-289; MAN-HEP-2015-15; IFJPAN-IV-2015-13; KA-TP-18-2015; DCPT-15-142; MCNET-15-28; IPPP-15-71; HERWIG-2015-01; CERN-PH-TH-2015-289; MAN-HEP-2015-15; IFJPAN-IV-2015-13; HERWIG-2015-01; KA-TP-18-2015; DCPT-15-142; MCNET-15-28; IPPP-15-71.-
Geneva : CERN, 2016-04-11 - 8 p.
- Published in : Eur. Phys. J. C 76 (2016) 196
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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Scale and isolation sensitivity of diphoton distributions at the LHC
/ Gehrmann, Thomas (Zurich U.) ; Glover, Nigel (Durham U., IPPP) ; Huss, Alexander (Durham U., IPPP ; CERN) ; Whitehead, James (Durham U., IPPP)
Precision measurements of diphoton distributions at the LHC display some tension with theory predictions, obtained at next-to-next-to-leading order (NNLO) in QCD. We revisit the theoretical uncertainties arising from the approximation of the experimental photon isolation by smooth-cone isolation, and from the choice of functional form for the renormalisation and factorisation scales. [...]
arXiv:2009.11310; IPPP/20/42; ZU-TH 17/20; CERN-TH-2020-160; CERN-TH-2020-160.-
2021-01-19 - 35 p.
- Published in : JHEP 2101 (2021) 108
Article from SCOAP3: scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF;
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