Publicação
A new method to distinguish hadronically decaying boosted $Z$ bosons from $W$ bosons using the ATLAS detector
| dc.contributor.author | ATLAS collaboration (2858 authors) | |
| dc.contributor.author | Aguilar-Saavedra, Juan Antonio | |
| dc.contributor.author | Amor Dos Santos, Susana Patricia | |
| dc.contributor.author | Anjos, Nuno | |
| dc.contributor.author | Araque, Juan Pedro | |
| dc.contributor.author | Cantrill, Robert | |
| dc.contributor.author | Carvalho, João | |
| dc.contributor.author | Castro, Nuno Filipe | |
| dc.contributor.author | Conde Muiño, Patricia | |
| dc.contributor.author | Da Cunha Sargedas De Sousa, Mario Jose | |
| dc.contributor.author | Fiolhais, Miguel | |
| dc.contributor.author | Galhardo, Bruno | |
| dc.contributor.author | Gomes, Agostinho | |
| dc.contributor.author | Gonçalo, Ricardo | |
| dc.contributor.author | Jorge, Pedro | |
| dc.contributor.author | Lopes, Lourenco | |
| dc.contributor.author | Machado Miguens, Joana | |
| dc.contributor.author | Maio, Amélia | |
| dc.contributor.author | Maneira, José | |
| dc.contributor.author | Onofre, António | |
| dc.contributor.author | Palma, Alberto | |
| dc.contributor.author | Pedro, Rute | |
| dc.contributor.author | Pina, João Antonio | |
| dc.contributor.author | Santos, Helena | |
| dc.contributor.author | Saraiva, João | |
| dc.contributor.author | Silva, José | |
| dc.contributor.author | Tavares Delgado, Ademar | |
| dc.contributor.author | Veloso, Filipe | |
| dc.contributor.author | Wolters, Helmut | |
| dc.date.accessioned | 2019-02-04T08:05:08Z | |
| dc.date.available | 2019-02-04T08:05:08Z | |
| dc.date.issued | 2016-04-28 | |
| dc.date.updated | 2019-02-04T08:05:07Z | |
| dc.description.abstract | The distribution of particles inside hadronic jets produced in the decay of boosted W and Z bosons can be used to discriminate such jets from the continuum background. Given that a jet has been identified as likely resulting from the hadronic decay of a boosted W or Z boson, this paper presents a technique for further differentiating Z bosons from W bosons. The variables used are jet mass, jet charge, and a b-tagging discriminant. A likelihood tagger is constructed from these variables and tested in the simulation of $W'\rightarrow WZ$ for bosons in the transverse momentum range 200 GeV $<p_\text {T}<$ 400 GeV in $\sqrt{s}=8$ TeV pp collisions with the ATLAS detector at the LHC. For Z-boson tagging efficiencies of $\epsilon _Z=90$ , 50, and $10\,\%$ , one can achieve $W^+$ -boson tagging rejection factors ( $1/\epsilon _{W^+}$ ) of 1.7, 8.3 and 1000, respectively. It is not possible to measure these efficiencies in the data due to the lack of a pure sample of high $p_\text {T}$ , hadronically decaying Z bosons. However, the modelling of the tagger inputs for boosted W bosons is studied in data using a $t\bar{t}$ -enriched sample of events in 20.3 fb ${}^{-1}$ of data at $\sqrt{s}=8$ TeV. The inputs are well modelled within uncertainties, which builds confidence in the expected tagger performance. | |
| dc.description.version | Peer Reviewed | |
| dc.identifier | Eur.Phys.J. C76 (2016) 238; DOI 10.1140/epjc/s10052-016-4065-1 | |
| dc.identifier.uri | http://dx.doi.org/10.1140/epjc/s10052-016-4065-1 | |
| dc.identifier.uri | http://hdl.handle.net/10400.26/26931 | |
| dc.language.iso | eng | |
| dc.title | A new method to distinguish hadronically decaying boosted $Z$ bosons from $W$ bosons using the ATLAS detector | |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| rcaap.rights | openAccess | pt |
| rcaap.type | article |