Measurements of t¯t differential cross-sections of highly boosted top quarks decaying to all-hadronic final states in pp collisions at √s p = 13 TeV using the ATLAS detector
Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and t ̄t system kinematic observables using proton-proton collisions at a center-of- mass energy of ffiffi s p 1⁄4 13 TeV. The data set corresponds to an integrated luminosity o...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2018 |
| País: | Argentina |
| Institución: | Universidad Nacional de La Plata |
| Repositorio: | SEDICI (UNLP) |
| Idioma: | inglés |
| OAI Identifier: | oai:sedici.unlp.edu.ar:10915/73188 |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/73188 |
| Access Level: | acceso abierto |
| Palabra clave: | Ciencias Exactas Física Atlas detector cross-sections all-hadronic pp collisions |
| Sumario: | Measurements are made of differential cross-sections of highly boosted pair-produced top quarks as a function of top-quark and t ̄t system kinematic observables using proton-proton collisions at a center-of- mass energy of ffiffi s p 1⁄4 13 TeV. The data set corresponds to an integrated luminosity of 36.1 fb−1, recorded in 2015 and 2016 with the ATLAS detector at the CERN Large Hadron Collider. Events with two large- radius jets in the final state, one with transverse momentum pT > 500 GeV and a second with pT > 350 GeV, are used for the measurement. The top-quark candidates are separated from the multijet background using jet substructure information and association with a b-tagged jet. The measured spectra are corrected for detector effects to a particle-level fiducial phase space and a parton-level limited phase space, and are compared to several Monte Carlo simulations by means of calculated χ2 values. The cross- section for t ̄t production in the fiducial phase-space region is 292 7ðstatÞ 71ðsystÞ fb, to be compared to the theoretical prediction of 384 36 fb. |
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