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Title: | Development and validation of HERWIG 7 tunes from CMS underlying-event measurements |
Authors: | CMS Collaboration Sirunyan, A. M. DUBE, SOURABH KANSAL, B. KAPOOR, A. KOTHEKAR, K. PANDEY, S. RANE, A. RASTOGI, A. SHARMA, SEEMA et al. Dept. of Physics |
Keywords: | Physics 2021-MAY-WEEK3 TOC-MAY-2021 2021 |
Issue Date: | Apr-2021 |
Publisher: | Springer Nature |
Citation: | European Physical Journal C, 81(4), 312. |
Abstract: | This paper presents new sets of parameters (“tunes”) for the underlying-event model of the HERWIG7 event generator. These parameters control the description of multiple-parton interactions (MPI) and colour reconnection in HERWIG7, and are obtained from a fit to minimum-bias data collected by the CMS experiment at s√=0.9, 7, and 13TeV. The tunes are based on the NNPDF 3.1 next-to-next-to-leading-order parton distribution function (PDF) set for the parton shower, and either a leading-order or next-to-next-to-leading-order PDF set for the simulation of MPI and the beam remnants. Predictions utilizing the tunes are produced for event shape observables in electron-positron collisions, and for minimum-bias, inclusive jet, top quark pair, and Z and W boson events in proton-proton collisions, and are compared with data. Each of the new tunes describes the data at a reasonable level, and the tunes using a leading-order PDF for the simulation of MPI provide the best description of the data. |
URI: | http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/5876 https://doi.org/10.1140/epjc/s10052-021-08949-5 |
ISSN: | 1434-6044 1434-6052 |
Appears in Collections: | JOURNAL ARTICLES |
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