Topic
Parton
About: Parton is a research topic. Over the lifetime, 13484 publications have been published within this topic receiving 368877 citations.
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TL;DR: In this article, the authors studied the matching of multijet matrix elements and shower evolution in the case of top production in hadronic collisions at the Tevatron and at the LHC.
Abstract: We study the matching of multijet matrix elements and shower evolution in the case of top production in hadronic collisions at the Tevatron and at the LHC. We present the results of the matching algorithm implemented in the ALPGEN Monte Carlo generator, and compare them with results obtained at the parton level, and with the predictions of the MC@NLO approach. We highlight the consistency of the matching algorithm when applied to these final states, and the excellent agreement obtained with MC@NLO for most inclusive quantities. We nevertheless identify also a remarkable difference in the rapidity spectrum of the leading jet accompanying the top quark pair, and comment on the likely origin of this discrepancy.
399 citations
TL;DR: In this paper, a phenomenological approach (EPOS) based on the parton model was proposed to understand proton-proton and deuteron-gold collisions in all four experiments conducted on the BNL Relativistic Heavy Ion Collider.
Abstract: We present a phenomenological approach (EPOS), based on the parton model, but going much beyond by incorporating elastic and inelastic parton ladder splitting. Based on this model, we try to understand proton-proton and deuteron-gold ($d\mathrm{Au}$) collisions, in particular the rapidity dependence of transverse momentum results in $d\mathrm{Au}$ from all four experiments conducted on the BNL Relativistic Heavy Ion Collider.
395 citations
TL;DR: In this article, a general method for calculating the fully differential cross section for the production of jets at next-to-leading order in a hadron collider is described. But this method is based on a "crossing" of calculations with all partons in the final state.
394 citations
TL;DR: This work investigates a wide variety of processes, and the new modified LO* PDF works at least as well as, and often better than, both LO and NLO PDFs in nearly all cases.
Abstract: We present a study of the results obtained by combining LO partonic matrix elements with either LO or NLO parton distributions. These are compared to the best prediction using NLO for both matrix elements and parton distributions. The aim is to determine which parton distributions are most appropriate to use in those cases where only LO matrix elements are available, e.g. as in many Monte Carlo generators. Both LO and NLO parton distributions have flaws, sometimes serious, for some processes, so a modified optimal LO set is suggested. We investigate a wide variety of processes, and the new modified LO* PDF works at least as well as, and often better than, both LO and NLO PDFs in nearly all cases.
394 citations