The Cosmological Zoo: Particles in the Universe
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- Опубликовано: 26 май 2024
- We know that the universe contains lots of different kinds of particles. What are they? In this one I discuss every Thing in the universe. The answers are pretty surprising!
This is the fifth of the videos in my new series of Cosmology. I'm going through Dr. Barbara Ryden's textbook "Introduction to Cosmology". If you follow along, you'll get a full upper-division undergraduate course in Cosmology. I used this textbook at William Paterson University.
This course will cover the current state of the science of Cosmology. To follow along, it'll be a good idea for you to ge to know your calculus. Here are the topics of this video:
Introductory Cosmology
Chapter 02: Fundamental Observations
Section 04: Different Types of Particles
Some things covered:
Elementary Particle Physics
Quarks, Leptons, Bosons and Hadrons
Introductory quantum chromodynamics
Baryonic and non-baryonic matter
Photons and the blackbody distribution
Neutrino flavors and their mysterious masses
Dark matter
Baryonic Matter: astronomy.swin.edu.au/cosmos/...
Exotic Matter: en.wikipedia.org/wiki/Exotic_...
Proton decay searches: journals.aps.org/prd/abstract...
Neutrino Mass Bounds in the era of Tension Cosmology: arxiv.org/abs/2112.02993
Diagram for neutrinos: S Adrián-Martínez et al 2016 J. Phys. G: Nucl. Part. Phys. 43 084001: iopscience.iop.org/article/10...
Direct neutrino-mass measurement with sub-electronvolt sensitivity: www.nature.com/articles/s4156...
Neutrinos have mass: tritonstation.com/2017/03/08/...
Review on dark matter searches: arxiv.org/abs/2205.06833
Textbook: / introduction-to-cosmology
Join this channel to get access to perks:
/ @jasonkendallastronomer 
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Jason is a person who I like without limit. He is guiding us through the theories that exist. Nothing more. And as such you should listen to him as the most efficient way to get current. His plan seem to be in the fold .... good plan .... anyways he read up on everything he is saying.
Thanks! That is the plan! My hope is to get the entire Cosmology course done before I go to the Winter AAS meeting in January 2025.
@@JasonKendallAstronomer I listen to you and other channels through sleepless nights cause I have some medication but my brain refuse to sleep. ANYWAYS forget that. My interest lately has been how everything has been established. The lewit cephids the parallax as a technician and a perfectionist eliminate the errors. So here come Jason and tell us how hard they are trying.
maybe Jason as a side show can delve into what pawed the way to these discoveries. It is all technical I am sure but as a technician I am not afraid, Cause I am trying to figure out why they know what they know,
I love this lecture series!! Thank you. I’m glad all went well in NM!
You are so welcome!
This is a wonderful series. Makes want to retake all my math classes from college! If I had only known!
I hadn't realized you just recorded these videos from your lectures following a textbook you do it so well. You're passion towards both astronomy and educating really shines through... such a wonderful combination...
Wow, thank you! Yes, I'm working on the entire textbook.
Awesome! I'm slowly starting to understand all of this and your videos are helping a lot.
Glad to help!
Thanks for this overview of cosmological particles! Really enjoying the series!
"There's particles in them thar hills!"
I am becoming increasingly convinced of higher quarks being found in the quark/gluon soup found at the cores of neutron stars. Their energy being sustained by the gravitational contraction as they ecrete matter at the surface. There is however, only theories, no way of ever proving it. But like the dubious, mathematical failure of the singularity at the cores of BH's, it makes most sense to me if there were.
Great lecture Mr. Kendall, thank you.
Probably not, although I don't pretend to understand their reasoning most physicists seem to be pretty convinced that there are 6 and only kinds of Quark and 6 Leptons.
Sorry missed the Premier: was watching another mate on a stream.
Nice channel. I subscribed :)
Thanks for the sub!
First booiyas!!!!
Luminiferous
Excellent stuff. Professor Kendall, is there a better explaination for dark matter that doesn't involve inventing a band-aid material? Could it be a magnetic process or something similarly non-arcane?
Nope. The energy density must be something like matter, but that doesn’t do light. That’s the conclusion of CMB studies.
Also, remember Haldane’s quote: “The universe is not only stranger than we imagine, it is stranger than we can imagine.”
The wild ad hoc nature of dark matter is just a glimpse into this strangeness.
Nature has no obligation to fit our common sense, which only works for our little corner of the planet Earth.
@@JasonKendallAstronomer Thanks. Looking forward to the next installment. I tend to watch them twice. Once to sleep, and again to learn
23:05 I have problems with understanding Photons! is a single Quant_of_Pht really a travelling packet of ELM_vibration in a "line" or is it a 3D_Sphere, expanding at c and "gaining" direction only at Time of Detection/Absorption?
But then again how to explain Lasers? (which always are a multitude od Quanta)
Please watch my series on light: Module 4: Atoms and Light: The Interaction and Nature of Light and Matter
ruclips.net/p/PLyu4Fovbph6e0oPk9ch3q2II9a8BT8gfL
YAHOO!!
Excellent ! Re dark matter.. Neil Turok suggests that the dark matter particle is a heavy right handed neutrino (as a result of one of the left handed neutrinos being zero mass ). If the zero mass is established in next few years he could be onto something !!
That theory has been around since the 80s.
@@DrDeuteron but the best theories stick around, amiright?!
@@pressureswitch I’ve always liked it, but idk about the details of how heavy or what temperature it would be, and whether it’s ruled out by cosmological considerations. As far as a standard model extension, it makes perfect sense unless some weird renormalization infinity ruins it.