Link to the Conference Program page

Youtube recorded videos (~ 2-½ hours each day): Day 1 | Day 2 | Day 3 | Day 4 | Day 5 |

There are at least 2 people who have created an index of each day's talks with links to key sections of each talk, along with some commentary.

One was created by me and is a thread at the cosmology subreddit. Links to each day: Day 1 | Day 2 | Day 3 | Day 4 | Day 5 |

The other was created by conference participant and panelist Behnam Javamardi, available on his blog: Day 1 | Day 2 | Day 3 | Day 4 | Day 5 |

There is also a twitter #H02020 hashtag, which has some additional coverage.

If I come across additional reference materials on this conference, I will add them to this post.

Tags: #Cosmology #H0 #Talks

I'd like to point out an excellent overview talk from this program by Raphael Flauger on Feb. 28 that reviews Hubble measurement physics and results from each of the major determination methods and discusses current status on Hubble tension. The video for Flauger's talk is here. That page does not have the talk slides (at least not yet anyway) but the slides are available in PDF format here. Update: the slides are also now available on the KITP video page. Here is a PDF of the slides.

In the cosmology subreddit that I'm a member of, there are frequent questions from those who have a grasp of the basics and are keenly interested in learning more about cosmology but do not work in the field themselves. I especially want to give a shout-out about this talk to that group. It's an excellent and reasonably accessible review of a key trending problem-area needing resolution for there to be a better understanding of whether adjustments are needed to the ΛCDM standard model of cosmology. This overview talk very clearly summarizes what would otherwise take hours and hours of digging to get. The rest of the program has very good material but some of it is rather specialized and deep.

A recent discussion in this reddit thread contrasted differing takes within the community on whether inflation preceded or followed the big bang. There are various reasons for this, some of it having to do with the history and evolution of what is meant by the term 'big bang', which was also explored in this earlier thread.

Here are comments from the overview page for this KITP program on this: “inflation not only explains the large-scale homogeneity and isotropy of the Universe, but also provides a causal mechanism that results in the seeds for the subsequent growth of structure. However, what happens after inflation remains poorly understood. The end of inflation must provide a hot Big Bang, also known as reheating, which eventually must lead to a thermal bath of Standard Model particles, dark matter, and any additional Beyond the Standard Model (BSM) sectors, at least by the time of nucleosynthesis.”

Tags: #Cosmology #H0 #Talks

So the following starter list is discontinued in favor of the above:

[2005.10384] Beware of commonly used approximations I: errors in forecasts, by Nicola Bellomo, José Luis Bernal, Giulio Scelfo, Alvise Raccanelli, Licia Verde [2005.09666] Beware of commonly used approximations II: estimating systematic biases in the best-fit parameters, by José Luis Bernal, Nicola Bellomo, Alvise Raccanelli, Licia Verde Jose Bernal – How to tell if your cosmological approximations are accurate, Cosmology Talk with Shaun Hotchkiss¹

[2005.10656] H0 tension or T0 tension?, by Mikhail M. Ivanov, Yacine Ali-Haïmoud, Julien Lesgourgues The Hubble-Penzias-Wilson tension – Yacine Ali-Haïmoud, Newton 1665 seminars⁴ Top arXiv papers from Week 21, 2020, review by Sunny Vagnozzi² Is the Hubble Tension actually a Temperature Tension?, astrobites article

[2005.02445] The Accuracy of the Hubble Constant Measurement Verified through Cepheid Amplitudes, by Adam G. Riess, Wenlong Yuan, Stefano Casertano, Lucas M. Macri, Dan Scolnic Adam Riess – Cepheid crowding is not the cause of the Hubble tension, Cosmology Talk with Shaun Hotchkiss | Twitter thread |

[2004.10207] Hubble constant tension between CMB lensing and BAO measurements, by W.L. Kimmy Wu, Pavel Motloch, Wayne Hu, Marco Raveri Kimmy Wu – Planck lensing and line of sight BAO in mild tension. A vital clue in the Hubble mystery?, Cosmology Talk with Shaun Hotchkiss | Twitter thread |

[2004.08404] Reheating and Post-inflationary Production of Dark Matter, by Marcos A. G. Garcia, Kunio Kaneta, Yann Mambrini, Keith A. Olive [2003.02846] A Model of Metastable EeV Dark Matter, by Emilian Dudas, Lucien Heurtier, Yann Mambrini, Keith A. Olive, Mathias Pierre [1911.02463] Inflation and Leptogenesis in High-Scale Supersymmetry, by Kunio Kaneta, Yann Mambrini, Keith A. Olive, Sarunas Verner Dark Matter physics in the Early Universe – Yann Mambrini, Newton 1665 seminars

[2004.05049] The $H_0$ tension: $ΔG_N$ vs. $ΔN_{\rm eff}$, by Guillermo Ballesteros, Alessio Notari, Fabrizio Rompineve Attempting to alleviate the H0 tension with physically motivated models – Alessio Notari, Newton 1665 seminars

[2004.01139] The Atacama Cosmology Telescope: A CMB lensing mass map over 2100 square degrees of sky and its cross-correlation with BOSS-CMASS galaxies, by Omar Darwish, et al. Omar Darwish – Lensing maps are great, but they're even better with the tSZ effect removed!, Cosmology Talks with Shaun Hotchkiss | Twitter thread |

[2003.09655] Intensity Mapping as a Probe of Axion Dark Matter, by Jurek B. Bauer, David J. E. Marsh, Renée Hložek, Hamsa Padmanabhan, Alex Laguë Jurek Bauer – Fuzzy dark matter arising from GUT scale physics should be ruled in/out by SKA, Cosmology Talk with Shaun Hotchkiss | Twitter thread |

[2003.07355] Early Dark Energy Does Not Restore Cosmological Concordance, by J. Colin Hill, Evan McDonough, Michael W. Toomey, Stephon Alexander Colin Hill – Early dark energy doesn't make cosmology concordant again, Cosmology Talk with Shaun Hotchkiss | Twitter thread | Top arXiv papers from Week 12, 2020, review by Sunny Vagnozzi

[2003.03354] What will it take to measure individual neutrino mass states using cosmology?, by Maria Archidiacono, Steen Hannestad, Julien Lesgourgues Julien Lesgourgues – Cosmology won't measure individual neutrino mass states, Cosmology Talk with Shaun Hotchkiss | Twitter thread | Top arXiv papers from Week 11, 2020, review by Sunny Vagnozzi

[2003.02273] Cosmological Bounds on sub-GeV Dark Vector Bosons from Electromagnetic Energy Injection, by John Coffey, Lindsay Forestell, David E. Morrissey, Graham White Graham White – Light dark matter is an ideal mix of particle and cosmology, Cosmology Talk with Shaun Hotchkiss | Twitter thread |

[2002.01550] Calibration of the Tip of the Red Giant Branch (TRGB), by Wendy L. Freedman, et al. [1907.05922] The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch, by Wendy L. Freedman, et al. KITP workshop talk by Wendy Freedman: Tip of the Red Giant Branch Calibration of the Hubble Constant³ For a rebuttal, see [1908.00993] Consistent Calibration of the Tip of the Red Giant Branch in the Large Magellanic Cloud on the Hubble Space Telescope Photometric System and a Re-determination of the Hubble Constant

[2002.01489] New empirical constraints on the cosmological evolution of gas and stars in galaxies, by Hamsa Padmanabhan, Abraham Loeb Hamsa Padmanabhan – The overlap between HI halo modelling and cosmology, Cosmology Talks with Shaun Hotchkiss | Twitter thread |

[2001.11044] Testing Low-Redshift Cosmic Acceleration with Large-Scale Structure, by Seshadri Nadathur, Will J. Percival, Florian Beutler, Hans Winther [1904.01030] Beyond BAO: improving cosmological constraints from BOSS with measurement of the void-galaxy cross-correlation, by Seshadri Nadathur, Paul M. Carter, Will J. Percival, Hans A. Winther, Julian Bautista Seshadri Nadathur – Voids are powerful, free and have tantalising insights on H0, Cosmology Talk with Shaun Hotchkiss | Twitter thread | Twitter thread by Sesh Nadathur

[2001.00394] Viable Gauge Choices in Cosmologies with Non-Linear Structures, by Timothy Clifton, Christopher S. Gallagher, Sophia Goldberg, Karim A. Malik Kit Gallagher – Viable Gauge Choices in Cosmologies with Non-Linear Structures, Cosmology Talk with Shaun Hotchkiss | Twitter thread |

[1910.04619] The synergy between CMB spectral distortions and anisotropies, by Matteo Lucca, Nils Schöneberg, Deanna C. Hooper, Julien Lesgourgues, Jens Chluba Deanna Hooper – CMB spectral distortions are a prime untapped resource, Cosmology Talk with Shaun Hotchkiss | Twitter thread | Deanna's 20-tweet thread |

[1909.02821] Probing Diffuse Gas with Fast Radio Bursts, by Anthony Walters, Yin-Zhe Ma, Jonathan Sievers, Amanda Weltman [1905.07132] Fast Radio Burst Cosmology and HIRAX, by Amanda Weltman, Anthony Walters [1810.05836] A Living Theory Catalogue for Fast Radio Bursts, by E. Platts, A. Weltman, A. Walters, S. P. Tendulkar, J.E.B. Gordin, S. Kandhai Amanda Weltman – Fast radio bursts and cosmology, Cosmology Talk with Shaun Hotchkiss | Twitter thread |

[1908.05625] An Improved Distance to NGC 4258 and its Implications for the Hubble Constant, by M. J. Reid, D. W. Pesce, A. G. Riess [2001.09213] The Megamaser Cosmology Project. XIII. Combined Hubble constant constraints KITP workshop talk by Mark Reid: NGC 4258 and the Megamaser Cosmology Project

[1908.03663] The Hubble Hunter's Guide, by Lloyd Knox, Marius Millea The Hubble Hunter's Guide – Marius Millea, Newton 1665 seminars

[1812.08244] Experiment to detect dark energy forces using atom interferometry, by Dylan Sabulsky, Indranil Dutta, E. A. Hinds, Benjamin Elder, Clare Burrage, Edmund J. Copeland Clare Burrage – Atomic lab experiments rule out almost all of chameleon dark energy model-space, Cosmology Talk with Shaun Hotchkiss | Twitter thread |

[1811.04083] Early Dark Energy Can Resolve The Hubble Tension, by Vivian Poulin, Tristan L. Smith, Tanvi Karwal, Marc Kamionkowski KITP workshop talk by Vivian Poulin: Early Dark Energy Resolution of the Hubble Crisis For a contra argument, see the items related to 2003.07355 above.

Footnotes: ¹ In addition to the Cosmology Talks series, Shaun Hotchkiss maintains an ongoing twitter thread on cosmologists tweeting about their papers. ² Each week Sunny Vagnozzi reviews three cosmology-related papers on his blog. ³ For other videos from this program, see KITP Conference: Tensions between the Early and the Late Universe ⁴ All Newton 1665 physics seminar videos ⁵ ESO Upcoming Conference, 22-Jun-2020 to 26-Jun-2020: H0: Assessing Uncertainties in Hubble’s Constant Across the Universe

Tags: #Cosmology #H0 #Talks