Publicação

Performance of missing transverse momentum reconstruction with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 13 TeV

Detalhes bibliográficos
Resumo:	The performance of the missing transverse momentum ( $E_{\mathrm{T}}^{\mathrm{miss}}$ ) reconstruction with the ATLAS detector is evaluated using data collected in proton–proton collisions at the LHC at a centre-of-mass energy of 13 TeV in 2015. To reconstruct $E_{\mathrm{T}}^{\mathrm{miss}}$ , fully calibrated electrons, muons, photons, hadronically decaying $\tau \text {-leptons}$ , and jets reconstructed from calorimeter energy deposits and charged-particle tracks are used. These are combined with the soft hadronic activity measured by reconstructed charged-particle tracks not associated with the hard objects. Possible double counting of contributions from reconstructed charged-particle tracks from the inner detector, energy deposits in the calorimeter, and reconstructed muons from the muon spectrometer is avoided by applying a signal ambiguity resolution procedure which rejects already used signals when combining the various $E_{\mathrm{T}}^{\mathrm{miss}}$ contributions. The individual terms as well as the overall reconstructed $E_{\mathrm{T}}^{\mathrm{miss}}$ are evaluated with various performance metrics for scale (linearity), resolution, and sensitivity to the data-taking conditions. The method developed to determine the systematic uncertainties of the $E_{\mathrm{T}}^{\mathrm{miss}}$ scale and resolution is discussed. Results are shown based on the full 2015 data sample corresponding to an integrated luminosity of $3.2~\hbox {fb}^{-1}$ .
Autores principais:	ATLAS collaboration (2867 authors)
Outros Autores:	Aguilar Saavedra, Juan Antonio; Amor Dos Santos, Susana Patricia; Anjos, Nuno; Araque Espinosa, Juan Pedro; Castro, Nuno Filipe; Conde Mui\~no, Patricia; Da Cunha Sargedas De Sousa, Mario Jose; Fiolhais, Miguel; Galhardo, Bruno; Gomes, Agostinho; Goncalo, Ricardo; Jorge, Pedro; Machado Miguens, Joana; Maio, Amelia; Maneira, Jose; Oleiro Seabra, Luis Filipe; Onofre, Ant\'onio; Costa Batalha Pedro, Rute; Santos, Helena; Saraiva, Joao; Silva, Jose Manuel; Tavares Delgado, Ademar; Veloso, Filipe; Wolters, Helmut
Ano:	2018
País:	Portugal
Tipo de documento:	artigo
Tipo de acesso:	acesso aberto
Instituição associada:	Laboratório de Instrumentação e Física Experimental de Partículas
Idioma:	inglês
Origem:	Laboratório de Instrumentação e Física Experimental de Partículas

Descrição
Resumo:	The performance of the missing transverse momentum ( $E_{\mathrm{T}}^{\mathrm{miss}}$ ) reconstruction with the ATLAS detector is evaluated using data collected in proton–proton collisions at the LHC at a centre-of-mass energy of 13 TeV in 2015. To reconstruct $E_{\mathrm{T}}^{\mathrm{miss}}$ , fully calibrated electrons, muons, photons, hadronically decaying $\tau \text {-leptons}$ , and jets reconstructed from calorimeter energy deposits and charged-particle tracks are used. These are combined with the soft hadronic activity measured by reconstructed charged-particle tracks not associated with the hard objects. Possible double counting of contributions from reconstructed charged-particle tracks from the inner detector, energy deposits in the calorimeter, and reconstructed muons from the muon spectrometer is avoided by applying a signal ambiguity resolution procedure which rejects already used signals when combining the various $E_{\mathrm{T}}^{\mathrm{miss}}$ contributions. The individual terms as well as the overall reconstructed $E_{\mathrm{T}}^{\mathrm{miss}}$ are evaluated with various performance metrics for scale (linearity), resolution, and sensitivity to the data-taking conditions. The method developed to determine the systematic uncertainties of the $E_{\mathrm{T}}^{\mathrm{miss}}$ scale and resolution is discussed. Results are shown based on the full 2015 data sample corresponding to an integrated luminosity of $3.2~\hbox {fb}^{-1}$ .