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The SEAN for SCIENCE Podcast
14 minutes | Jul 17, 2020
arXiv roundup for 2020-07-17
Heyo! Welcome to this week's round up on the arXiv.This week we started a series of Lectures on Vertex Operator Algebras. We're building up to study the Moonshine Module of the Fischer Griess Monster Group. So stay tuned! They're M-F, and we record in the field. You can check out the lecture notes here.If you're looking for something still vaguely math flavored, but perhaps a little lighter, you can check out the associated vlog.Papers Discussed Today**Hamiltonian derivation of dual gravitational charges**Hadi Godazgar, Mahdi Godazgar, Malcolm J. Perryhttps://arxiv.org/abs/2007.07144**Barbero’s Hamiltonian derived from a generalized Hilbert-Palatini action**Soren Holst https://arxiv.org/abs/gr-qc/9511026**Qubits on the Horizon: Decoherence and Thermalization near Black Holes**Greg Kaplanek, C.P. Burgesshttps://arxiv.org/abs/2007.05984**Detecting Topological Quantum Phase Transitions via the c-Function**Matteo Baggioli, Dimitrios Giataganashttps://arxiv.org/abs/2007.07273**Anomalous dimensions for ϕn in scale invariant d=3 theory**I. Jack, D.R.T. Joneshttps://arxiv.org/abs/2007.07190**Search for the lepton flavor violating decay τ→ 3μ in proton-proton collisions at s√= 13 TeV**CMShttps://arxiv.org/abs/2007.05658**Search for decays of the 125 GeV Higgs boson into a Z boson and a ρ or ϕ meson**CMShttps://arxiv.org/abs/2007.05122The Experimentalist Lightning Round**A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector**ATLAShttps://arxiv.org/abs/2007.07830**Search for resonances decaying into a weak vector boson and a Higgs boson in the fully hadronic final state produced in proton−proton collisions at s√=13 TeV with the ATLAS detector**ATLAShttps://arxiv.org/abs/2007.05293**Measurements of inclusive and differential cross-sections of combined tt¯γ and tWγ production in the eμ channel at 13 TeV with the ATLAS detector**ATLAShttps://arxiv.org/abs/2007.06946**Observation of enhanced double parton scattering in proton-lead collisions at =8.16 TeV**LHCbhttps://arxiv.org/abs/2007.06945The Super Duper Speed Round**Evidence for X(3872)→J/ψπ+π− produced in single-tag two-photon interactions**Bellehttps://arxiv.org/abs/2007.05696**Observation of the Doubly Cabibbo-Suppressed Decay D+→K+π+π−π0 and Evidence for D+→K+ω**BESIIIhttps://arxiv.org/abs/2007.07674**Azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic lepton scattering by transversely polarized protons**HERMEShttps://arxiv.org/abs/2007.07755This has been a production by me, Sean, of Sean For Science, which is associated to the Pasayten Project.Theme Music By Tigerblood Jewel.
12 minutes | Jul 13, 2020
2020-07-12 : Last Week's arXiv Round Up!
The Papers Referenced in Today's Show!BMS Symmetry via AdS/CFTDavid A. Lowe, David M. Ramirezhttps://arxiv.org/abs/2007.02851Moduli Stabilisation and the Statistics of SUSY Breaking in the LandscapeIgor Broeckel, Michele Cicoli, Anshuman Maharana, Kajal Singh, Kuver Sinhahttps://arxiv.org/abs/2007.04327Logarithmic CFT at generic central charge: from Liouville theory to the Q-state Potts modelRongvoram Nivesvivat*, Sylvain Ribaulthttps://arxiv.org/abs/2007.04190* Sorry Rongvoram! Drop me a line and teach me how to properly say your name!Spin structures and baby universesVijay Balasubramanian, Arjun Kar, Simon F. Ross, Tomonori Ugajinhttps://arxiv.org/abs/2007.04333Amplituhedra, and BeyondLivia Ferro, Tomasz Lukowskihttps://arxiv.org/abs/2007.04342Central Charges for AdS Black HolesMalcolm Perry, Maria J. Rodriguezhttps://arxiv.org/abs/2007.03709An Algorithm for Quantum Computation of Particle DecaysAnthony Ciavarellahttps://arxiv.org/abs/2007.04447Experimentalist Lightning Round!!Investigation into the event-activity dependence of Υ(nS) relative production in proton-proton collisions at s√= 7 TeVCMShttps://arxiv.org/abs/2007.04277Measurement of single top-quark production in association with a W boson in the single-lepton channel at s√=8 TeV with the ATLAS detectorATLAS Collaborationhttps://arxiv.org/abs/2007.01554Measurements of WH and ZH production in the H→bb¯ decay channel in pp collisions at 13 TeV with the ATLAS detectorATLAShttps://arxiv.org/abs/2007.02873First observation of the decay B0→ D0D0nar K+ π−LHCbhttps://arxiv.org/abs/2007.04280Searches for low-mass dimuon resonancesLHCbhttps://arxiv.org/abs/2007.03923MusicAs always for these things, all music comes from Tigerblood Jewel via Epidemic Sound!
19 minutes | Apr 21, 2020
013 : Blackbody Radiation
Thanks for listening!I'll probably update the branding of this show to reflect that it's not really a daily anymore. But I'll still aim to produce as many pieces as I can.Here's a written form of this piece in case you're curious.Here are the papers cited today:Ueber die Energievertheilung im Emissionsspectrum eines schwarzen KörpersWilhelm WienAnnalen der Physik Volume294, Issue8, p. Pages 662-669 (1896)http://myweb.rz.uni-augsburg.de/~eckern/adp/history/historic-papers/1896_294_662-669.pdfOn an Improvement of Wien’s Equation for the SpectrumM. Planck, Verhandl. Dtsch. phys. Ges., 2, 202English translation from “The Old Quantum Theory,” ed. by D. ter Haar,Pergamon Press, 1967, p. 79.On the Law of Distribution of Energy in the Normal SpectrumMax PlanckAnnalen der Physik, vol. 4, p. 553 ff (1901)English Translation!http://dbhs.wvusd.k12.ca.us/webdocs/Chem-History/Planck-1901/Planck-1901.htmlA Brief History of the T4 Radiation LawJohn CrepeauProceedings HT 2009 ASME Summer Heat Transfer ConferenceMusic today by OOYY and Tigerblood Jewel, courtesy of Epidemic Sound.
12 minutes | Apr 15, 2020
012 : ArXiv Round Up!
Today's round up!Gravitational Wave from Axion-SU(2) Gauge Fields: Effective Field Theory for Kinetically Driven InflationYuki Watanabe, Eiichiro Komatsuhttps://arxiv.org/abs/2004.04350Exotic Symmetries, Duality, and Fractons in 2+1-Dimensional Quantum Field TheoryNathan Seiberg, Shu-Heng Shaohttps://arxiv.org/abs/2003.10466Is there a novel Einstein-Gauss-Bonnet theory in four dimensions?Metin Gurses, Tahsin Cagri Sisman, Bayram Tekinhttps://arxiv.org/abs/2004.03390Adding crust to BPS Skyrme neutron starsC. Adam, J. Sanchez-Guillen, R. Vazquez, A. Wereszczynskihttps://arxiv.org/abs/2004.03610Vortices and waves in light dark matterLam Hui, Austin Joyce, Michael J. Landry, Xinyu Lihttps://arxiv.org/abs/2004.01188The Self-Organized Critical MultiverseGuram Kartvelishvili, Justin Khoury, Anushrut Sharmahttps://arxiv.org/abs/2003.12594Phenomenology and Cosmology of No-Scale Attractor Models of InflationJohn Ellis, Dimitri V. Nanopoulos, Keith A. Olive, Sarunas Vernerhttps://arxiv.org/abs/2004.00643Music today by Tigerblood Jewel.
2 minutes | Apr 14, 2020
Interlude / Update
It's hard to write a podcast everyday! So I'm rethinking things. Music today by the extremely talented OOYY.
11 minutes | Apr 6, 2020
011 : When Economics Meets Physics
Universal patterns of inequalityAnand Banerjee, Victor M. Yakovenkohttps://arxiv.org/abs/0912.4898The Large D Limit of Einstein's EquationsRoberto Emparan, Christopher P. Herzoghttps://arxiv.org/abs/2003.11394Samir's website (fuzzballs, blackholes, the whole works)A Planar Diagram Theory for Strong InteractionsGerard 't Hooft PythiaBalmer Serieshttps://en.wikipedia.org/wiki/Balmer_seriesI'm not sure why the always portray Johann Balmer as a school teacher. He was, at least for a bit, a serious Mathematician. He got his doctorate. Sure he taught kids. But he also lectured at the University of Basel. But I guess it makes for a fun story.
10 minutes | Apr 3, 2020
010 : Particle Friday with Muons!
Proca NuevoClaudia de Rham, Victor Pozsgay https://arxiv.org/abs/2003.13773Massive GravityClaudia de Rhamhttps://arxiv.org/abs/1401.4173Muon Fun Facts- mass: 105 MeV/c^2- lifetime : 2.196 x 10^-6 s - typical decay : nu_mu + anti nu_e + e- cosmic generation flux averages to 1 / cm^2 / minParticle Data Group Fact Sheet on the Muonhttp://pdg.lbl.gov/2019/listings/rpp2019-list-muon.pdfExploratorium's Discussion of Cosmic Rayshttps://www.exploratorium.edu/relativity/time_proof.htmlThe muon g-2 experiment https://muon-g-2.fnal.gov/
9 minutes | Apr 2, 2020
009 : Oscillators to Operators
Higuchi Bound on Slow Roll Inflation and the SwamplandMarvin Lüben, Dieter Lusthttps://arxiv.org/abs/2003.10494Some associated reading:- DeSitter and the Swampland : https://arxiv.org/abs/1806.08362- Distance and dS Conjectures : https://arxiv.org/abs/1810.05506- String Excitations and an H Bound : https://arxiv.org/abs/1907.0416Some Oscillator Exercises:1. Get the scaling factors right for x and p in the operator a = x + i p. (hint, check out the show notes from episode 008).2. Prove that the Hamiltonian is proportional to a^dagger a + 1/2.3. Why is the the Type I state with eigenvalue 0 the vacuum?4. Use recursion to find all Type II states. (hint. we gave you the definition in the podcast!)5. Find the generic Type I state in terms of Type II states.6. Normalize that generic Type I state!7. Show that the transition probability from a state a Type II state of N particles to a generic Type I state is given by the Poisson distribution. What parametrizes that distribution?Bonus: For a Type I state, show by explicit construction to what extent the time dependence of the expectation value of X and P follows the classical orbits.
7 minutes | Mar 30, 2020
008 : All Science All The Time!
Today's Find!Chiral Symmetry and the Cosmological ConstantStephon Alexander, Gabriel Herczeg, Jinglong Liu, Evan McDonoughhttps://arxiv.org/abs/2003.08416Here's the original paper on the Chern-Simons-y "BF" theory.Topological Features of the Quantum VacuumStephon Alexander, Raúl Carballo-Rubiohttps://arxiv.org/abs/1810.02159Holomorphic Coordinates Parameters * Z = sqrt(m/2) omega ^2 x + i p / sqrt(2m) * ZBar = sqrt(m/2) omega ^2 x - i p / sqrt(2m)
7 minutes | Mar 19, 2020
007 : Mazama is done for the Season. Groomer Down! Keep it Local!
Methow Trails Report : https://www.methowtrails.org/trail-reportClassical Gravitational Scattering at O(G^3) from Feynman DiagramsClifford Cheung, Mikhail P. Solonhttps://arxiv.org/abs/2003.08351Washington Trails Association Bulletin : https://www.wta.org/go-outside/hiking-in-the-time-of-coronavirusAmerican Alpine Club : https://americanalpineclub.org/news/2020/3/17/climbers-take-action-against-coronavirusNate Silver Quote : https://twitter.com/NateSilver538/status/1240379410945052672?s=20
11 minutes | Mar 17, 2020
006 : It's Too Late for Early Dark Energy and Programming Boundary Conditions
Early Dark Energy Does Not Restore Cosmological ConcordanceJ. Colin Hill, Evan McDonough, Michael W. Toomey, Stephon Alexanderhttps://arxiv.org/abs/2003.07355Integrable Kondo problemsDavide Gaiotto, Ji Hoon Lee, Jingxiang Wuhttps://arxiv.org/abs/2003.06694Costello's Original Paper : https://arxiv.org/abs/1303.2632Costello, Witten and Yamazaki : https://arxiv.org/pdf/1709.09993.pdfHere's a useful, informal explanation from Ed: https://arxiv.org/pdf/1611.00592.pdfThe main idea appears to be taking the apparent analogy between the Yang Baxter equation an the familiar looking Reidemeister move seriously enough to try to draw a correspondence. The ensuing attempts to make a reasonable lead to the work.
12 minutes | Mar 16, 2020
005 : Bad Astrophysical Acronyms, White Dwarfs and Socializing at the Trailhead?!
Gravitational-lensing measurements push Hubble-constant discrepancy past 5σJohanna Millerhttps://physicstoday.scitation.org/doi/10.1063/PT.3.4424Rare nuclear transition provides evidence for stellar explosion mechanismRachel Berkowitzhttps://physicstoday.scitation.org/doi/full/10.1063/PT.3.4425COSMOGRAIL https://www.epfl.ch/labs/lastro/scientific-activities/cosmograil/Cephid Variable Stars : https://en.wikipedia.org/wiki/Cepheid_variableQuasars : https://en.wikipedia.org/wiki/QuasarHey! Check this quote from the above link: “The power radiated by quasars is enormous: the most powerful quasars have luminosities thousands of times greater than a galaxy such as the Milky Way.” That is bananas!Time-Delay Cosmography : Sjur Refsdal : https://academic.oup.com/mnras/article/128/4/307/2601707The Hubble Parameter : https://en.wikipedia.org/wiki/Hubble%27s_lawHow to “flatten the curve”: Harry Stevens : https://www.washingtonpost.com/graphics/2020/world/corona-simulator/Cosmic Microwave Background (CMB) : https://en.wikipedia.org/wiki/Cosmic_microwave_backgroundBaryon Acoustic Oscillations : https://en.wikipedia.org/wiki/Baryon_acoustic_oscillationsPauli Exclusion Principle : https://en.wikipedia.org/wiki/Pauli_exclusion_principleLiterally what’s on my desk : https://reubensbrews.com/beer/bits-bobs-ipa/
9 minutes | Mar 13, 2020
004 : COVID-19 Cancels Trail Races and some MSSM pheno from Heterotic M-Theory
how NotesKrissy’s Blog post on Postponing Chuckanuthttp://krissymoehl.com/blog/2020/3/13/having-to-postpone-chuckanutGary’s IG Post : https://www.instagram.com/p/B9sJQU4JKAu/Line Bundle Hidden Sectors for Strongly Coupled Heterotic Standard ModelsAnthony Ashmore, Sebastian Dumitru and Burt A. Ovruthttps://arxiv.org/pdf/2003.05455.pdfGroup Theory for Unified Model BuildingRichard Slanskyhttp://inspirehep.net/record/10204?ln=enSphaelerons : https://en.wikipedia.org/wiki/Sphaleron
11 minutes | Mar 12, 2020
003 : Running Away from People, Applications of the Renormalization Group and some Data Ethics.
From Trail NewsThe Outbreak Virtual Run : https://www.bansheerunning.com/banshee-outbreak-virtual-runMy blog post on GPX Errors : https://www.seanfor.science/notebook/data-devils-gulch-120m-gpx-and-the-case-of-missing-elevationThe Devil’s Gulch 120M : https://www.bansheerunning.com/devils-gulch-120From the arXivConstruction and classification of Coulomb branch geometriesPhilip Argyres, Mario Martonehttps://arxiv.org/abs/2003.04954Landau poles in condensed matter systemsShao-Kai Jian, Edwin Barnes, Sankar Das Sarmahttps://arxiv.org/abs/2003.05098See also:Landau Poles: https://en.wikipedia.org/wiki/Landau_poleSingularity Theory : https://en.wikipedia.org/wiki/Singularity_theoryV. Arnol’d : https://en.wikipedia.org/wiki/Vladimir_ArnoldRené Thom : https://en.wikipedia.org/wiki/Ren%C3%A9_ThomMy work with friends on cosmic inflation and singularity structure of the scalar potential:From the MSSM : https://arxiv.org/abs/1106.5004Catastrophic Inflation : https://arxiv.org/abs/1106.2266 Attractors, Universality and Inflation : https://arxiv.org/abs/1203.6892Data EthicsMicrosoft’s "Tay" Twitter Chat Bot : https://www.theverge.com/2016/3/24/11297050/tay-microsoft-chatbot-racistGoogle's Automatic Photo Labeling : https://www.theverge.com/2018/1/12/16882408/google-racist-gorillas-photo-recognition-algorithm-ai
10 minutes | Mar 11, 2020
002 : Quantum Gravity and Runner Tracking Errors!
Referenced PapersKate Eckerle : "A Simple System for Coleman-de Luccia transitions" : https://arxiv.org/abs/2003.04365Tom Banks and Willy Fischler : "Holographic Space Time, Netwon's Law and the Dynamics of Horizons" : https://arxiv.org/abs/2003.03637Here's Tom's QFT book.Top Recommendations for Improving Runner Tracking1. Have an automated runner number tracker. (Chip or QR Code)2. Have a check in and check out time for aid stations. In real time. 3. Check for unphysical situations! Other LinksThe Methow Conservancy : https://methowconservancy.org/Talking with Johnny at the MC, they apparently manage something like 122 conservation easements! Which is a lot of work for a tiny little organization. Here's a link to their late night owl walk.Rainshadow Running's Orcas 100M! http://www.rainshadowrunning.com/orcas-island-100m.htmlIt's like the premier, new school, local PNW 100 miler. The best people. The best party. The best pizza. Hands down. And it's a beast of a course, especially considering the time of year.Finally, here's a link to my blog post summarizing the findings so far on Orcas 100M runner tracking.https://www.seanfor.science/notebook/data-runner-tracking-at-orcas-100m
8 minutes | Mar 10, 2020
001 : We're back with Supergravity!
Papers referenced today.Brane-Jet Instabilities https://arxiv.org/abs/2003.02851Bena, Pilch and Warner show how the SO(3) x SO(3) vacuum of maximal gauged supergravity is actually unstable in the context of M-theory, which has some interesting consequences.AdS5 Vacua from TensorFlow : https://arxiv.org/abs/2003.03979Pilch and friends hunt for AdS5 vacuum solutions in gauged SO(6) Supergravity. (Oh yes, don your N=4 SYM hats, amongst others)4D N=1 Kaluza-Klein superspace : https://arxiv.org/abs/2003.01790Katrin and Daniel demo the 4D technology to write compactifications of 11D Supergravity (yes, with all your favorite M-theory ingredients) better break out that extra-large pad of paper.Here's the APS Program I mentioned.APS Innovation Fund : https://www.aps.org/programs/innovation/fund/
9 minutes | Dec 3, 2019
Breaking supersymmetry with pure spinors https://arxiv.org/abs/1912.00001Mass Production of IIA and IIB dS Vacuahttps://arxiv.org/abs/1912.00027 * a easy book reference: [Catastrophe Theory and Its Applications Tim Poston, Ian Stewart * my earlier work on this : https://arxiv.org/abs/1203.6892 * Liam and friends : https://arxiv.org/abs/1103.2775Goldstone Boson Effects on Vacuum Decayhttps://arxiv.org/abs/1912.00199Universal Dynamics of Heavy Operators in CFT2https://arxiv.org/abs/1912.00222 * Paul Ginsparq’s notes : https://arxiv.org/abs/hep-th/9108028The Python’s Lunch: geometric obstructions to decoding Hawking radiationhttps://arxiv.org/abs/1912.00228* ER = EPR : https://arxiv.org/abs/1306.0533Four Lectures on Analytic Solutions in Open String Field Theoryhttps://arxiv.org/abs/1912.00521Extending the Geometry of Heterotic Spectral Cover Constructionshttps://arxiv.org/abs/1912.00971Scalar gauge dynamics and Dark Matterhttps://arxiv.org/abs/1911.04502^^ This idea could be very interesting. * Slansky [Group Theory for Unified Model Building]
6 minutes | Dec 2, 2019
BTZ Trailing Strings, from a D1-D5-P System* https://arxiv.org/abs/1911.12821* Samir's website and notes.* The BTZ paperWilson Loops and Integrability In N=4 SYMhttps://arxiv.org/abs/1911.13141Novel Matter Coupling to Einstein Gravityhttps://arxiv.org/abs/1911.12026The paper Trail...* C. Lin and S. Mukohyama, JCAP 1710, no. 10, 033 (2017) doi:10.1088/1475-7516/2017/10/033 [arXiv:1708.03757 [gr-qc]].* R. Carballo-Rubio, F. Di Filippo and S. Liberati, JCAP 1806, no. 06, 026 (2018) Erratum: [JCAP 1811, no. 11, E02 (2018)] [arXiv:1802.02537 [gr-qc]].* S. Mukohyama and K. Noui, JCAP 1907, 049 (2019) doi:10.1088/1475-7516/2019/07/049 [arXiv:1905.02000 [gr-qc]].* C. Lin, JCAP 1905, 037 (2019) doi:10.1088/1475-7516/2019/05/037 [arXiv:1811.02467 [gr-qc]].and of course the Canonical Analysis of GR:* https://arxiv.org/abs/1804.03902* https://arxiv.org/abs/1810.01047
7 minutes | Nov 22, 2019
All-Multiplicity Non-Planar MHV Amplitudes in sYM at Two Loopshttps://arxiv.org/abs/1911.09106 Gauge-invariant observables in gravity and electromagnetism: black hole backgrounds and null dressings : https://arxiv.org/abs/1911.09115A paradox regarding monogamy of entanglement : https://arxiv.org/abs/1911.09226This one. Definitely worth a read.Anna's earlier paper: Local, non-classical model of Bell correlations : https://arxiv.org/abs/1907.11805See also notes from Barbara Tarhal's 2003 talk here: https://arxiv.org/abs/quant-ph/0307120Von Neumann Entropy in QFT : https://arxiv.org/abs/1911.09390
7 minutes | Nov 20, 2019
Quick notes for today.*Axion Fragmentation*https://arxiv.org/abs/1911.08472*Imprints of the Early Universe on Axion Dark Matter Substructure*https://arxiv.org/abs/1911.07853^^ Patrick was one of the first people I ever met in High Energy Physics! Way back in KITP days.*Non-stationary Energy in General Relativity*https://arxiv.org/abs/1911.08383*The emergence of expanding space-time and intersecting D-branes from classical solutions in the Lorentzian type IIB matrix model*https://arxiv.org/abs/1911.08132
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