Two sets of White Paper submissions, Science and APC¹, are available in response to the Astro2020 Decadal Survey. CSV files of info on them are available at that site. I took those source files and created searchable HTML pages with links to the PDF files for each paper. What's searchable is the paper title, the principal author and their institution, a short description of the paper, and (for the Science White Papers) the NASA ADS Bibcode record. The ADS data was extracted from an AAS Bulletin.

Each of the two searchable webpages has a link to the other, as well as to the source data. The webpages are self-contained with all the data included in the html file, which contains the javascript code for the searches and the CSS for styling.

The original purpose in doing this was because many of the submissions were not on the arXiv, and I wanted to see what else was available and also so the PDF file link were all on one page. In addition, though, the search feature has been very useful.

Virtual Particles: PhysicsForums series | Matt Strassler article | reddit post |

Planck Length: PhysicsForums article

Cosmology: Sean Carroll on True Facts About Cosmology (or, Misconceptions Skewered) | Inflationary Misconceptions and the Basics of Cosmological Horizons | Inflation Balloon Analogy Misconceptions | Expanding Confusion: common misconceptions of cosmological horizons and the superluminal expansion of the Universe, by Davis and Lineweaver |

Quantum Mechanics: reddit thread

Statistics: Statistical tests, P values, confidence intervals, and power: a guide to misinterpretations

Slides from talk by Chris Tully at the Opening New Windows to the Universe forum at Brookhaven National Labs on 2021-11-03: PTOLEMY: Relic Neutrino Detection New developments since this post was originally created: Cosmologist Sunny Vagnozzi shares some updated info on the PTOLEMY project status in a short thread here. He also mentions that he is collaborating on a paper about PTOLEMY with Stefano Gariazzo that will soon (as of March 2020) be posted on the arXiv. -—

This is about paper 1902.05508, posted to the arXiv on 2/14/2019.

I was mostly unfamiliar with this groundbreaking project so this new paper provided a reading-up opportunity, leading to these general overview notes. I added the bolding for emphasis.

The PTOLEMY project¹ aims to directly detect relic neutrinos from the cosmic neutrino background (CNB or CνB), along with a impressive broader set of capabilities or opportunities^2a. The project is described as the “the first of its kind and the only one^2b conceived that can look directly at the image of the Universe encoded in neutrino background produced in the first second after the Big Bang”.³ (pg2) Achieving the project's goal “would profoundly confront and extend the sensitivity of precision cosmology data.”(pg5) This paper addresses the theoretical aspects of the project, its physics goals, and an outline of the project's scope of work to be done in the next three years. An earlier paper 1808.01892 gives more details on three phases of the project: proof-of-principle demonstrator, scalable prototype realization and tests, and full detector construction.

The technology is based on neutrino capture on beta decaying nuclei (NCB)⁵, with tritium (³H) determined as the best choice. The capture results in a tiny boost of energy to the electrons emitted in tritium decay, so there'll be a peak in the electron spectrum above the β-decay endpoint⁴. The planned target is ∼100g of tritium atomically bound to a radio-pure graphene substrate (they refer to it as “tritiated graphene”). They expect ∼10 CνB capture events per year, depending on the mass hierarchy and the Dirac versus Majorana nature of the neutrinos; the rate is half as large for non-relativistic Dirac neutrinos^2a. The anticipated energy resolution is ∼0.05eV, “an order of magnitude beyond the original target and the highest resolution of any calorimeter.” [source]

The graphic below is from Planck 2013 results. XVI. Cosmological parameters, Table 1 on page 6.