CERN Accelerating science

Article
Report number	arXiv:1605.07192 ; DESY-16-088 ; CERN-TH-2016-120
Title	Underlying event sensitive observables in Drell-Yan production using GENEVA
Related title	Underlying event sensitive observables in Drell-Yan production using GENEVA
Author(s)	Alioli, Simone (CERN) ; Bauer, Christian W. (LBL, Berkeley) ; Guns, Sam (LBL, Berkeley) ; Tackmann, Frank J. (DESY)
Publication	2016-11-09
Imprint	23 May 2016
Number of pages	24
Note	Comments: 23 pages, 11 figures 23 pages, 11 figures. v3: version accepted by EPJC
In:	Eur. Phys. J. C 76 (2016) 614
DOI	10.1140/epjc/s10052-016-4458-1
Subject category	Particle Physics - Phenomenology
Abstract	We present an extension of the GENEVA Monte Carlo framework to include multiple parton interactions (MPI) provided by PYTHIA8. This allows us to obtain predictions for underlying-event sensitive measurements in Drell-Yan production, in conjunction with GENEVA's fully-differential NNLO calculation, NNLL' resummation for the 0-jet resolution variable (beam thrust), and NLL resummation for the 1-jet resolution variable. We describe the interface with the parton shower algorithm and MPI model of PYTHIA8, which preserves both the precision of partonic N-jet cross sections in GENEVA as well as the shower accuracy and good description of soft hadronic physics of PYTHIA8. We present results for several underlying-event sensitive observables and compare to data from ATLAS and CMS as well as to standalone PYTHIA8 predictions. This includes a comparison with the recent ATLAS measurement of the beam thrust spectrum, which provides a potential avenue to fully disentangle the physical effects from the primary hard interaction, primary soft radiation, multiple parton interactions, and nonperturbative hadronization.
Copyright/License	License publication: © 2016-2024 The Author(s) (License: CC-BY-4.0), sponsored by SCOAP³

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