Universidad Iberoamericana Ciudad de México

About: Universidad Iberoamericana Ciudad de México is a education organization based out in Mexico City, Mexico. It is known for research contribution in the topics: Large Hadron Collider & Standard Model. The organization has 2259 authors who have published 3981 publications receiving 109298 citations.

Search for resonant t t ¯ production in proton-proton collisions at √s=13 TeV

Abstract: A search for a heavy resonance decaying into a top quark and antiquark $$ \left(\mathrm{t}\overline{\mathrm{t}}\right) $$ pair is performed using proton-proton collisions at $$ \sqrt{s}=13 $$ TeV. The search uses the data set collected with the CMS detector in 2016, which corresponds to an integrated luminosity of 35.9 fb−1. The analysis considers three exclusive final states and uses reconstruction techniques that are optimized for top quarks with high Lorentz boosts, which requires the use of nonisolated leptons and jet substructure techniques. No significant excess of events relative to the expected yield from standard model processes is observed. Upper limits on the production cross section of heavy resonances decaying to a $$ \mathrm{t}\overline{\mathrm{t}} $$ pair are calculated. Limits are derived for a leptophobic topcolor Z′ resonance with widths of 1, 10, and 30%, relative to the mass of the resonance, and exclude masses up to 3.80, 5.25, and 6.65 TeV, respectively. Kaluza-Klein excitations of the gluon in the Randall-Sundrum model are excluded up to 4.55 TeV. To date, these are the most stringent limits on $$ \mathrm{t}\overline{\mathrm{t}} $$ resonances.

Schooling Inequality and Language Barriers

Abstract: This article estimates the impact of language barriers on school achievement and the potential ameliorating role of bilingual education. Using large household data sets from poor rural communities in Mexico, we find that parental language (failure to speak Spanish) represents an important barrier to the schooling of indigenous children. We provide an empirical test suggesting that this largely reflects parental human capital related to culture/language, rather than unobserved wealth effects. Using double difference estimators with community fixed effects to address endogenous program placement, we demonstrate that schools with bilingual education narrow the gap in the educational performance of children with monolingual mothers versus bilingual and nonindigenous mothers.

Study of substructure of high transverse momentum jets produced in proton-antiproton collisions at √s=1.96TeV

Abstract: Department of Energy (US); National Science Foundation (US); Istituto Nazionale di Fisica Nucleare (Italia); Ministry of Education, Culture, Sports, Science and Technology (Japan); National Research Council of Canada; Swiss National Science Foundation; Alfred P. Sloan Foundation; Bundesministerium fur Bildung und Forschung (Deutschland); National Research Foundation of Korea; Science and Technology Facilities Council (UK); The Royal Society (UK); Russian Foundation for Basic Research; Ministerio de Ciencia e Innovacion (Espana); Slovak Research and Development Agency; Academy of Finland; Australian Research Council.