Multiple interactions and the structure of beam remnants

By Torbjörn Sjöstrand, Peter Z. Skands. 2004

262 citations recorded by the source corpus.

Recent experimental data have established some of the basic features of multiple interactions in hadron-hadron collisions. The emphasis is therefore now shifting, to one of exploring more detailed aspects. Starting from a brief review of the current situation, a next-generation model is developed, wherein a detailed account is given of correlated flavour, colour, longitudinal and transverse momentum distributions, encompassing both the partons initiating perturbative interactions and the partons left in the beam remnants. Some of the main features are illustrated for the Tevatron and the LHC.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/a97454d46f906da29bc095366ec65c2227b0467c

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Citations in the corpus

String formation beyond leading colour (2015, methodology): “In the original (non-interleaved) MPI model in PYTHIA 6 [28, 46], the parameters PARP(85) and PARP(86) allowed to force a fraction of the MPI final states to be two gluons colour-connected to their nearest neighbours in momentum space.”
General-purpose event generators for LHC physics (2011, methodology): “Some useful additional references to the history and development of the subject of multiple interactions also outside the Monte Carlo context can be found in the Perugia MPI workshop proceedings [97] and in the mini-reviews contained in [89, 98].”
Simulation of multiple partonic interactions in Herwig (2008, methodology): “An important issue, which has been addressed in [32] is the relation between the charged particle multiplicity and the average transverse momentum in the underlying event.”
Handbook of LHC Higgs Cross Sections: 3. Higgs Properties (2013, methodology): “In Pythia the underlying eve nt is simulated using a multipartonic interaction (MPI) model [269, 270], that is tuned on underlying ev ent or minimal bias data.”
Parameterization of γ, epm, and Neutrino Spectra Produced by p-p Interaction in Astronomical Environments (2006, background): “…the high energy non-diffractive process (Tp > 52.6 GeV), Pythia 6.2 (Sjöstrand et al. 2001) with the multi-parton-level scaling violation option (Sjöstrand & Skands 2004);4 for the lower energy non-diffractive process, the parameterized model by (Blattnig et al. 2000); for the diffractive…”
Colour reconnections in Herwig++ (2012, background): “r but will be replaced by a new approach [20]. The current model in Pythia diers from the original development in some details and follows the idea of interleaved partonic interactions and showering [21,22]. In the recent releases of Herwig an MPI model is also included [23]. It comes with two main ”
Jet pair production in POWHEG (2010, methodology): “The recent versions of PYTHIA include a model of multiple-parton interactions (MPI) [44] that improves the description of the underlying event accompanying the hard scattering process.”
Factorization at the LHC: From parton distribution functions to initial state jets (2010, methodology): “In these event generators the corresponding effects should be described at leading order by the initial-state parton shower in conjunction with models for the underlying event [24, 60, 161, 162].”
Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements (2019, methodology): “In all tunes, we use the MPI-based CR model [41].”
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On the characterisation of the underlying event (2009, background): “[10, 18]), they do illustrate the difficulties that arise in ascribing unambiguous physical meaning to it.”
Double parton distributions incorporating perturbative QCD evolution and momentum and quark number sum rules (2009, methodology): “For the purposes of the accurate prediction of double parton scattering cross sections and signals at the LHC, there is a need for a more theoretically sound set of double distributions than either the naive factorised forms traditionally used, or the improved forms suggested in [27].”
Factorization at the LHC: From PDFs to Initial State Jets (Ph.D. thesis) (2009, background): “60] and Herwig [23, 80]. In these event generators the corresponding eects should be described at leading order by the initial-state parton shower in conjunction with models for the underlying event [24, 60, 161, 162]. We will see that the initial-state parton shower is in fact closer to factorizati”