The proton spin crisis (sometimes called the "proton spin puzzle") is a theoretical crisis precipitated by an experiment in 1987 which tried to determine the spin configuration of the proton. The experiment was carried out by the European Muon Collaboration (EMC). Physicists expected that the quarks carry all the proton spin. However, not only was the total proton spin carried by quarks far smaller than 100%, these results were consistent with almost zero (4–24%) proton spin being carried by quarks. This surprising and puzzling result was termed the "proton spin crisis". The problem is considered one of the important unsolved problems in physics. (Wikipedia).
What is the "spin" of a particle?
“Spin” is one of the core building blocks of quantum reality, but it is a subtle concept to grasp. Here’s Brian Greene with one way to think about it. Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscienceu.com/ Like us on Fac
From playlist Science Unplugged: Quantum Mechanics
What happened during the Big Bang?
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From playlist Science Unplugged: Cosmology
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From playlist Science Unplugged: Particle Physics
Fabiola Gianotti, Higgs boson: foundations and implications of a very special discovery - 29-05-2013
Colloqui della Classe di Scienze - Mercoledì 29 maggio 2013 Fabiola Gianotti, CERN Higgs boson: foundations and implications of a very special discovery Sala Azzurra - Palazzo della Carovana Piazza dei Cavalieri Abstract On 4 July 2012, the ATLAS and CMS experiments operating at the CERN
From playlist Colloqui della Classe di Scienze
Current Status of Primordial Black Holes by Juan Garcia-Bellido
PROGRAM LESS TRAVELLED PATH OF DARK MATTER: AXIONS AND PRIMORDIAL BLACK HOLES (ONLINE) ORGANIZERS: Subinoy Das (IIA, Bangalore), Koushik Dutta (IISER, Kolkata / SINP, Kolkata), Raghavan Rangarajan (Ahmedabad University) and Vikram Rentala (IIT Bombay) DATE: 09 November 2020 to 13 Novemb
From playlist Less Travelled Path of Dark Matter: Axions and Primordial Black Holes (Online)
Direct Detection of Dark Energy by Surjeet Rajendran
PROGRAM LESS TRAVELLED PATH OF DARK MATTER: AXIONS AND PRIMORDIAL BLACK HOLES (ONLINE) ORGANIZERS: Subinoy Das (IIA, Bangalore), Koushik Dutta (IISER, Kolkata / SINP, Kolkata), Raghavan Rangarajan (Ahmedabad University) and Vikram Rentala (IIT Bombay) DATE: 09 November 2020 to 13 Novemb
From playlist Less Travelled Path of Dark Matter: Axions and Primordial Black Holes (Online)
Hermann Nicolai - Symmetry and Unifi cation... - 24-10-2018
https://www.sns.it/eventi/symmetry-and-unification-can-physics-be-reduced-single-formula Colloqui della Classe di Scienze Hermann Nicolai (Max Planck Institute for Gravitational Physics) Symmetry and Unification -- can Physics be reduced to a single formula? Abstract "Attempts to `unif
From playlist Colloqui della Classe di Scienze
Astronomy - The Sun (5.5 of 16) What is the Proton-Proton Chain?
Visit http://ilectureonline.com for more math and science lectures! (This video replaces a previous video containing an error located at: http://youtu.be/Us-J9cB3CqE) In this video I will explain the proton-proton chain of the Sun. Next video in Series: http://youtu.be/bXjdZPZg7oc
From playlist ASTRONOMY 16 THE SUN
Science & Technology Q&A for Kids (and others) [Part 110]
Stephen Wolfram hosts a live and unscripted Ask Me Anything about the history of science and technology for all ages. Find the playlist of Q&A's here: https://wolfr.am/youtube-sw-qa Originally livestreamed at: https://twitch.tv/stephen_wolfram If you missed the original livestream of thi
From playlist Stephen Wolfram Ask Me Anything About Science & Technology
LHCNews Nov 12, 2009 - Protons are back in the LHC!
After more than a year, protons were injected into the LHC...
From playlist The Large Hadron Collider
Low-x phenomenology (LXPH - Lecture 1) by Raju Venugopalan
PROGRAM THE MYRIAD COLORFUL WAYS OF UNDERSTANDING EXTREME QCD MATTER ORGANIZERS: Ayan Mukhopadhyay, Sayantan Sharma and Ravindran V DATE: 01 April 2019 to 17 April 2019 VENUE: Ramanujan Lecture Hall, ICTS Bangalore Strongly interacting phases of QCD matter at extreme temperature and
From playlist The Myriad Colorful Ways of Understanding Extreme QCD Matter 2019
Physics 20B. Cosmology. Lec. 22: Dark Matter and Dark Energy
UCI Physics 20B: Cosmology (Winter 2015) Lec 22. Cosmology -- Dark Matter and Dark Energy View the complete course: http://ocw.uci.edu/courses/physics_20b_cosmology.html Instructor: James Bullock, Ph.D. License: Creative Commons CC-BY-SA Terms of Use: http://ocw.uci.edu/info More courses
From playlist Physics 20B: Cosmology
Mind-Blowing Facts About Our Reality [4K] | The Secrets of Quantum Physics | Spark
Professor Jim Al-Khalili traces the story of arguably the most important, accurate and yet perplexing scientific theory ever: quantum physics. The story of quantum physics starts at the beginning of the 20th century with scientists trying to better understand how light bulbs work. This si
From playlist Happy Birthday Professor Jim Al-Khalili!
Watch more videos on http://www.brightstorm.com/science/chemistry SUBSCRIBE FOR All OUR VIDEOS! https://www.youtube.com/subscription_center?add_user=brightstorm2 VISIT BRIGHTSTORM.com FOR TONS OF VIDEO TUTORIALS AND OTHER FEATURES! http://www.brightstorm.com/ LET'S CONNECT! Facebook ► h
From playlist Chemistry
What Happens Inside a Proton Collision? - with James Beacham
Proton collisions are not like car crashes because quantum is weird. Subscribe for regular science videos: http://bit.ly/RiSubscRibe In this clip from his lecture on particle physics, James Beacham explains why proton collisions observed in a particle accelerator are very much not like c
From playlist Highlights from Ri Talks
Physics - Ch 66.5 Quantum Mechanics: The Hydrogen Atom (48 of 78) Spin-Flip Energy Difference
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what causes the spin-flip energy difference. Why does the spin of the electron matches the spin of the proton in a hydrogen atom. The electron is in a higher energy state and conversely when t
From playlist PHYSICS 66.5 QUANTUM MECHANICS: THE HYDROGEN ATOM
Q&A 112: Are Stars Moving The Same Speed And More... Featuring Ethan Siegel
This week's questions show was recorded at the 235th Meeting of the American Astronomical Society in Honolulu, Hawaii. I was lucky enough to have 3,500 astronomers, space scientists and others to talk with. Ethan Siegel from "Starts with a Bang" is back, and this time he's answering your q
From playlist Questions and Answers with Fraser Cain
Are We Finally on the Road to Fusion Power?
Head to https://linode.com/scishow to get a $100 60-day credit on a new Linode account. Linode offers simple, affordable, and accessible Linux cloud solutions and services. Scientists working at a nuclear fusion facility in Oxford announced a record-breaking result. And while there's stil
From playlist Uploads
Small particles like protons, neutrons, and electrons are often shown to be spinning on an axis like a planet, but this simply cannot be the case. Quantum mechanical spin is actually an intrinsic property like charge, so how does that work? ________________________________ VIDEO ANNOTATION
From playlist Quantum Physics