Measurement of colour flow using jet-pull observables in t ¯t events with the ATLAS experiment at √ s = 13TeV
Metadata
Show full item recordEditorial
Springer Nature
Date
2018-10-22Referencia bibliográfica
Rimoldi, M., Mullier, G., Miucci, A., Merlassino, C., Haug, S., Weber, M., ... & Ereditato, A. (2018). Measurement of colour flow using jet-pull observables in tt events with the ATLAS experiment at√ s= 13 TeV. European physical journal. C-particles and fields, 78(847).
Sponsorship
We acknowledge the support of ANPCyT, Argentina; YerPhI, Armenia; ARC, Australia; BMWFW and FWF, Austria; ANAS, Azerbaijan; SSTC, Belarus; CNPq and FAPESP, Brazil; NSERC, NRC and CFI, Canada; CERN; CONICYT, Chile; CAS,MOST and NSFC, China; COLCIENCIAS, Colombia; MSMT CR, MPO CR and VSC CR, Czech Republic; DNRF and DNSRC, Denmark; IN2P3-CNRS, CEA-DRF/IRFU, France; SRNSFG, Georgia; BMBF, HGF, and MPG, Germany; GSRT, Greece; RGC, Hong Kong SAR, China; ISF, I-CORE and Benoziyo Center, Israel; INFN, Italy; MEXT and JSPS, Japan; CNRST, Morocco; NWO, Netherlands; RCN, Norway; MNiSW and NCN, Poland; FCT, Portugal; MNE/IFA, Romania; MES of Russia and NRC KI, Russian Federation; JINR;MESTD, Serbia; MSSR, Slovakia; ARRS andMIZŠ, Slovenia; DST/NRF, South Africa; MINECO, Spain; SRC and Wallenberg Foundation, Sweden; SERI, SNSF and Cantons of Bern and Geneva, Switzerland; MOST, Taiwan; TAEK, Turkey; STFC, United Kingdom; DOE and NSF, United States of America. In addition, individual groups and members have received support from BCKDF, the Canada Council, CANARIE, CRC, Compute Canada, FQRNT, and the Ontario Innovation Trust, Canada; EPLANET, ERC, ERDF, FP7, Horizon 2020 and Marie Skłodowska-Curie Actions, European Union; Investissements d’Avenir Labex and Idex, ANR, Région Auvergne and Fondation Partager le Savoir, France; DFG and AvH Foundation, Germany; Herakleitos, Thales and Aristeia programmes co-financed by EU-ESF and the Greek NSRF; BSF, GIF and Minerva, Israel; BRF, Norway; CERCA Programme Generalitat de Catalunya, Generalitat Valenciana, Spain; the Royal Society and Leverhulme Trust, United Kingdom. The crucial computing support from all WLCG partners is acknowledged gratefully, in particular from CERN, the ATLAS Tier-1 facilities at TRIUMF (Canada), NDGF (Denmark, Norway, Sweden), CC-IN2P3 (France), KIT/GridKA (Germany), INFN-CNAF (Italy), NL-T1 (Netherlands), PIC (Spain), ASGC (Taiwan), RAL (UK) and BNL (USA), the Tier-2 facilities worldwide and large non-WLCG resource providers.Abstract
Previous studies have shown that weighted angular
moments derived from jet constituents encode the colour
connections between partons that seed the jets. This paper
presents measurements of two such distributions, the jet-pull
angle and jet-pull magnitude, both of which are derived from
the jet-pull angular moment. The measurement is performed
in t ¯t events with one leptonically decaying W boson and one
hadronically decaying W boson, using 36.1 fb−1 of pp collision
data recorded by the ATLAS detector at
√
s = 13 TeV
delivered by the Large Hadron Collider. The observables are
measured for two dijet systems, corresponding to the colourconnected
daughters of the W boson and the two b-jets from
the top-quark decays, which are not expected to be colour
connected. To allow the comparison of the measured distributions
to colour model predictions, the measured distributions
are unfolded to particle level, after correcting for
experimental effects introduced by the detector. While good
agreement can be found for some combinations of predictions
and observables, none of the predictions describes the
data well across all observables.