Initial-state parton shower kinematics for NLO event generators
| dc.creator | Odaka, S. | |
| dc.creator | Kurihara, Y. | |
| dc.date | 2007-02-14 | |
| dc.date | 2007-06-08 | |
| dc.date.accessioned | 2026-07-07T11:59:04Z | |
| dc.date.available | 2026-07-07T11:59:04Z | |
| dc.description | We are developing a consistent method to combine tree-level event generators for hadron collision interactions with those including one additional QCD radiation from the initial-state partons, based on the limited leading-log (LLL) subtraction method, aiming at an application to NLO event generators. In this method, a boundary between non-radiative and radiative processes necessarily appears at the factorization scale (mu_F). The radiation effects are simulated using a parton shower (PS) in non-radiative processes. It is therefore crucial in our method to apply a PS which well reproduces the radiation activities evaluated from the matrix-element (ME) calculations for radiative processes. The PS activity depends on the applied kinematics model. In this paper we introduce two models for our simple initial-state leading-log PS: a model similar to the "old" PYTHIA-PS and a p_T-prefixed model motivated by ME calculations. PS simulations employing these models are tested using W-boson production at LHC as an example. Both simulations show a smooth matching to the LLL-subtracted W + 1 jet simulation in the p_T distribution of W bosons, and the summed p_T spectra are stable against a variation of mu_F, despite that the p_T-prefixed PS results in an apparently harder p_T spectrum. | |
| dc.description | 10 pages, 6 figures; minor changes in the abstract and the text according to the comments from the referee | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0702138 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0702138 | |
| dc.identifier | Eur.Phys.J.C51:867-873,2007 | |
| dc.identifier | doi:10.1140/epjc/s10052-007-0342-3 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/206437 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Initial-state parton shower kinematics for NLO event generators | |
| dc.type | text |