Cultura tributaria y su relación con la evasión de impuestos en contribuyentes de renta de primera Categoría El Tambo-2020

El presente trabajo de investigación tiene por título Cultura Tributaria y su relación con la Evasión de Impuestos en contribuyentes de renta de primera categoría el Tambo-2020, su desarrollo tiene como principal objetivo determinar la relación que existe entre la cultura tributaria y la evasión de impuestos en los contribuyentes generadores de renta de primera categoría en el distrito y año antes mencionados. En la presente se ha desarrollado una metodología de enfoque mixto, con un tipo de investigación aplicada, haciendo uso del método Deductivo- Inductivo de diseño no experimental transeccional correlacional. Para la recolección de datos se utilizaron la encuesta y el cuestionario como técnica e instrumento de recolección de datos respectivamente, este instrumento lo componen 20 ítems con escala que valoración de Likert, este a su vez ha sido validado por el profesional idóneo

Search for dark matter produced in association with bottom or top quarks in √s = 13 TeV pp collisions with the ATLAS detector

A search for weakly interacting massive particle dark matter produced in association with bottom or top quarks is presented. Final states containing third-generation quarks and miss- ing transverse momentum are considered. The analysis uses 36.1 fb−1 of proton–proton collision data recorded by the ATLAS experiment at √s = 13 TeV in 2015 and 2016. No significant excess of events above the estimated backgrounds is observed. The results are in- terpreted in the framework of simplified models of spin-0 dark-matter mediators. For colour- neutral spin-0 mediators produced in association with top quarks and decaying into a pair of dark-matter particles, mediator masses below 50 GeV are excluded assuming a dark-matter candidate mass of 1 GeV and unitary couplings. For scalar and pseudoscalar mediators produced in association with bottom quarks, the search sets limits on the production cross- section of 300 times the predicted rate for mediators with masses between 10 and 50 GeV and assuming a dark-matter mass of 1 GeV and unitary coupling. Constraints on colour- charged scalar simplified models are also presented. Assuming a dark-matter particle mass of 35 GeV, mediator particles with mass below 1.1 TeV are excluded for couplings yielding a dark-matter relic density consistent with measurements

Measurement of the inclusive isolated-photon cross section in pp collisions at √s = 13 TeV using 36 fb−1 of ATLAS data

The differential cross section for isolated-photon production in pp collisions is measured at a centre-of-mass energy of 13 TeV with the ATLAS detector at the LHC using an integrated luminosity of 36.1 fb. The differential cross section is presented as a function of the photon transverse energy in different regions of photon pseudorapidity. The differential cross section as a function of the absolute value of the photon pseudorapidity is also presented in different regions of photon transverse energy. Next-to-leading-order QCD calculations from Jetphox and Sherpa as well as next-to-next-to-leading-order QCD calculations from Nnlojet are compared with the measurement, using several parameterisations of the proton parton distribution functions. The predictions provide a good description of the data within the experimental and theoretical uncertainties. [Figure not available: see fulltext.