Discovery of the First Low-Luminosity Quasar at z > 7

Kavli Affiliate: Naoshi Sugiyama | Summary:We report the discovery of a quasar at z = 7.07, which was selected from the deep multi-band imaging data collected by the Hyper Suprime-Cam (HSC) Subaru Strategic Program survey. This quasar, HSC J124353.93+010038.5, has an order of magnitude lower luminosity than do the other known quasars at z > […]


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The International Linear Collider. A Global Project

Kavli Affiliate: Hiroaki Aihara | Summary:A large, world-wide community of physicists is working to realise an exceptional physics program of energy-frontier, electron-positron collisions with the International Linear Collider (ILC). This program will begin with a central focus on high-precision and model-independent measurements of the Higgs boson couplings. This method of searching for new physics beyond […]


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The cohomological Hall algebra of a surface and factorization cohomology

Kavli Affiliate: Mikhail Kapranov | Summary:For a smooth quasi-projective surface S over complex numbers we consider the Borel-Moore homology of the stack of coherent sheaves on S with compact support and make this space into an associative algebra by a version of the Hall multiplication. This multiplication involves data (virtual pullbacks) governing the derived moduli […]


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Research and Development for Near Detector Systems Towards Long Term Evolution of Ultra-precise Long-baseline Neutrino Experiments

Kavli Affiliate: Mark Hartz | Summary:With the discovery of non-zero value of $θ_13$ mixing angle, the next generation of long-baseline neutrino (LBN) experiments offers the possibility of obtaining statistically significant samples of muon and electron neutrinos and anti-neutrinos with large oscillation effects. In this document we intend to highlight the importance of Near Detector facilities […]


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Future Opportunities in Accelerator-based Neutrino Physics

Kavli Affiliate: Masayuki Nakahata | First 5 Authors: Andrea Dell’Acqua, Antoni Aduszkiewicz, Markus Ahlers, Hiroaki Aihara, Tyler Alion | Summary: This document summarizes the conclusions of the Neutrino Town Meeting held at CERN in October 2018 to review the neutrino field at large with the aim of defining a strategy for accelerator-based neutrino physics in […]


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Future Opportunities in Accelerator-based Neutrino Physics

Kavli Affiliate: Mark Hartz | Summary:This document summarizes the conclusions of the Neutrino Town Meeting held at CERN in October 2018 to review the neutrino field at large with the aim of defining a strategy for accelerator-based neutrino physics in Europe. The importance of the field across its many complementary components is stressed. Recommendations are […]


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Gelfand-Fuchs cohomology in algebraic geometry and factorization algebras

Kavli Affiliate: Mikhail Kapranov | Summary:Let X be a smooth affine variety over a field k of characteristic 0 and T(X) be the Lie algebra of regular vector fields on X. We compute the Lie algebra cohomology of T(X) with coefficients in k. The answer is given in topological terms relative to any embedding of […]


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Towards geometric Satake correspondence for Kac-Moody algebras — Cherkis bow varieties and affine Lie algebras of type $A$

Kavli Affiliate: Hiraku Nakajima | Summary:We give a provisional construction of the Kac-Moody Lie algebra module structure on the hyperbolic restriction of the intersection cohomology complex of the Coulomb branch of a framed quiver gauge theory, as a refinement of the conjectural geometric Satake correspondence for Kac-Moody algebras proposed in an earlier paper with Braverman, […]


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Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data

Kavli Affiliate: Hiroaki Aihara | Summary:We measure cosmic weak lensing shear power spectra with the Subaru Hyper Suprime-Cam (HSC) survey first-year shear catalog covering 137deg$^2$ of the sky. Thanks to the high effective galaxy number density of $sim$17 arcmin$^-2$ even after conservative cuts such as magnitude cut of $i<24.5$ and photometric redshift cut of $0.3leq […]


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Observation of a Dirac nodal line in AlB2

Kavli Affiliate: Kentaro Hori | Summary:We have performed angle-resolved photoemission spectroscopy of AlB2 which is isostructural to high-temperature superconductor MgB2. Using soft-x-ray photons, we accurately determined the three-dimensional bulk band structure and found a highly anisotropic Dirac-cone band at the K point in the bulk hexagonal Brillouin zone. This band disperses downward on approaching the […]


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