Institution
IFAE
Other•Barcelona, Spain•
About: IFAE is a other organization based out in Barcelona, Spain. It is known for research contribution in the topics: Large Hadron Collider & Galaxy. The organization has 664 authors who have published 1270 publications receiving 51097 citations. The organization is also known as: Instituto de Fisica de Altas Energias & IFAE.
Topics: Large Hadron Collider, Galaxy, Higgs boson, Redshift, MAGIC (telescope)
Papers published on a yearly basis
Papers
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TL;DR: In this article, a search is conducted for a beyond-the-standard-model boson using events where a Higgs boson with mass 125 GeV decays to four leptons (l = e or μ).
Abstract: A search is conducted for a beyond-the-Standard-Model boson using events where a Higgs boson with mass 125 GeV decays to four leptons (l = e or μ). This decay is presumed to occur via an intermediate state which contains one or two on-shell, promptly decaying bosons: H → ZX/XX → 4l, where X is a new vector boson Z$_{d}$ or pseudoscalar a with mass between 1 and 60 GeV. The search uses pp collision data collected with the ATLAS detector at the LHC with an integrated luminosity of 36.1 fb$^{−1}$ at a centre-of-mass energy $ \sqrt{s}=13 $ TeV. No significant excess of events above Standard Model background predictions is observed, therefore, upper limits at 95% confidence level are set on modelindependent fiducial cross-sections, and on the Higgs boson decay branching ratios to vector and pseudoscalar bosons in two benchmark models.
44 citations
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Texas A&M University1, Fermilab2, Carnegie Institution for Science3, University of Surrey4, University College London5, Rhodes University6, Institut d'Astrophysique de Paris7, National Center for Supercomputing Applications8, University of Illinois at Urbana–Champaign9, IFAE10, Stanford University11, University of Pennsylvania12, Indian Institute of Technology, Hyderabad13, California Institute of Technology14, Spanish National Research Council15, University of Chicago16, Autonomous University of Madrid17, University of Michigan18, SLAC National Accelerator Laboratory19, ETH Zurich20, Ohio State University21, University of Washington22, Santa Cruz Institute for Particle Physics23, Australian Astronomical Observatory24, Argonne National Laboratory25, Catalan Institution for Research and Advanced Studies26, Universidade Federal do Rio Grande do Sul27, University of Southampton28, State University of Campinas29, Oak Ridge National Laboratory30, Institute of Cosmology and Gravitation, University of Portsmouth31
TL;DR: In this article, chemical abundance measurements of three stars in the ultrafaint dwarf galaxy Horologium I, a Milky Way satellite discovered by the Dark Energy Survey, were presented.
Abstract: We present chemical abundance measurements of three stars in the ultrafaint dwarf galaxy Horologium I, a Milky Way satellite discovered by the Dark Energy Survey. Using high-resolution spectroscopic observations, we measure the metallicity of the three stars, as well as abundance ratios of several α-elements, iron-peak elements, and neutron-capture elements. The abundance pattern is relatively consistent among all three stars, which have a low average metallicity of [Fe/H] ~ −2.6 and are not α-enhanced ([α/Fe] ~ 0.0). This result is unexpected when compared to other low-metallicity stars in the Galactic halo and other ultrafaint dwarfs and suggests the possibility of a different mechanism for the enrichment of Hor I compared to other satellites. We discuss possible scenarios that could lead to this observed nucleosynthetic signature, including extended star formation, enrichment by a Population III supernova, and or an association with the Large Magellanic Cloud.
44 citations
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TL;DR: In this paper, it has been shown that Figure 30 shows the 68% and 99% confidence-level contours for the W boson and top quark mass measurements, instead of the 66% and 95% confidence level contours, as stated in the legend.
Abstract: It has been found that Figure 30 shows the 68% and 99% confidence-level contours for the W boson and top quark mass measurements, instead of the 68% and 95% confidence-level contours, as stated in the legend.
44 citations
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TL;DR: In this article, a measurement of light-by-light scattering based on Pb+Pb collision data recorded by the ATLAS experiment during Run 2 of the LHC is described.
Abstract: This paper describes a measurement of light-by-light scattering based on Pb+Pb collision data recorded by the ATLAS experiment during Run 2 of the LHC. The study uses 2.2 nb$^{−1}$ of integrated luminosity collected in 2015 and 2018 at $ \sqrt{s_{\mathrm{NN}}} $ = 5.02 TeV. Light-by-light scattering candidates are selected in events with two photons produced exclusively, each with transverse energy $ {E}_{\mathrm{T}}^{\gamma } $> 2.5 GeV, pseudorapidity |η$_{γ}$| 5 GeV, and with small diphoton transverse momentum and diphoton acoplanarity. The integrated and differential fiducial cross sections are measured and compared with theoretical predictions. The diphoton invariant mass distribution is used to set limits on the production of axion-like particles. This result provides the most stringent limits to date on axion-like particle production for masses in the range 6–100 GeV. Cross sections above 2 to 70 nb are excluded at the 95% CL in that mass interval.[graphic not available: see fulltext]
44 citations
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TL;DR: In this article, a search for the supersymmetric partners of the Standard Model bottom and top quarks is presented using 36.1 fb$^{−1}$ of pp collision data at 13 $ TeV collected by the ATLAS experiment at the Large Hadron Collider.
Abstract: A search for the supersymmetric partners of the Standard Model bottom and top quarks is presented. The search uses 36.1 fb$^{−1}$ of pp collision data at $ \sqrt{s}=13 $ TeV collected by the ATLAS experiment at the Large Hadron Collider. Direct production of pairs of bottom and top squarks ( $ {\overline{b}}_1 $ and $ {\overline{t}}_1 $ ) is searched for in final states with b-tagged jets and missing transverse momentum. Distinctive selections are defined with either no charged leptons (electrons or muons) in the final state, or one charged lepton. The zero-lepton selection targets models in which the $ {\overline{b}}_1 $ is the lightest squark and decays via $ {\overline{b}}_1\to b{\overline{\chi}}_1^0 $ , where $ {\overline{\chi}}_1^0 $ is the lightest neutralino. The one-lepton final state targets models where bottom or top squarks are produced and can decay into multiple channels, $ {\overline{b}}_1\to b{\overline{\chi}}_1^0 $ and $ {\overline{b}}_1\to t{\overline{\chi}}_1^{\pm } $ , or $ {\overline{t}}_1\to t{\overline{\chi}}_1^0 $ and $ {\overline{t}}_1\to b{\overline{\chi}}_1^{\pm } $ , where $ {\overline{\chi}}_1^{\pm } $ is the lightest chargino and the mass difference $ {m}_{{\overline{\chi}}_1^{\pm }}-{m}_{{\overline{\chi}}_1^0} $ is set to 1 GeV. No excess above the expected Standard Model background is observed. Exclusion limits at 95% confidence level on the mass of third-generation squarks are derived in various supersymmetry-inspired simplified models.
44 citations
Authors
Showing all 672 results
Name | H-index | Papers | Citations |
---|---|---|---|
J. S. Lange | 160 | 2083 | 145919 |
Diego F. Torres | 137 | 948 | 72180 |
M. I. Martínez | 134 | 1251 | 79885 |
Jose Flix | 133 | 1257 | 90626 |
Matteo Cavalli-Sforza | 129 | 1273 | 89442 |
Ilya Korolkov | 128 | 884 | 75312 |
Martine Bosman | 128 | 942 | 73848 |
Maria Pilar Casado | 128 | 981 | 78550 |
Clement Helsens | 128 | 870 | 74899 |
Imma Riu | 128 | 954 | 73842 |
Sebastian Grinstein | 128 | 1222 | 79158 |
Remi Zaidan | 126 | 744 | 71647 |
Arely Cortes-Gonzalez | 124 | 774 | 68755 |
Trisha Farooque | 124 | 841 | 69620 |
Martin Tripiana | 124 | 716 | 69652 |