In particle physics, lepton number (historically also called lepton charge)is a conserved quantum number representing the difference between the number of leptons and the number of antileptons in an elementary particle reaction.Lepton number is an additive quantum number, so its sum is preserved in interactions (as opposed to multiplicative quantum numbers such as parity, where the product is preserved instead). Mathematically, the lepton number is defined by where * is the number of leptons and * is the number of antileptons. Lepton number was introduced in 1953 to explain the absence of reactions such as ν + n → p + e− in the Cowan–Reines neutrino experiment, which instead observed ν + p → n + e+ This process, inverse beta decay, conserves lepton number, as the incoming antineutrino has lepton number −1, while the outgoing positron (antielectron) also has lepton number −1. (Wikipedia).
Moving on from Lagrange's equation, I show you how to derive Hamilton's equation.
From playlist Physics ONE
Theory of numbers: Gauss's lemma
This lecture is part of an online undergraduate course on the theory of numbers. We describe Gauss's lemma which gives a useful criterion for whether a number n is a quadratic residue of a prime p. We work it out explicitly for n = -1, 2 and 3, and as an application prove some cases of Di
From playlist Theory of numbers
2023 Number Challenge: Find sum of four squares that is equal to 2023
#mathonshorts #shorts check out wiki page: https://en.wikipedia.org/wiki/Lagrange%27s_four-square_theorem Lagrange's four-square theorem, also known as Bachet's conjecture, states that every natural number can be represented as the sum of four integer squares.
From playlist Math Problems with Number 2023
The Frobenius Problem - Method for Finding the Frobenius Number of Two Numbers
Goes over how to find the Frobenius Number of two Numbers.
From playlist ℕumber Theory
Proof of Lemma and Lagrange's Theorem
Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys Proof of Lemma and Lagrange's Theorem. This video starts by proving that any two right cosets have the same cardinality. Then we prove Lagrange's Theorem which says that if H is a subgroup of a finite group G then the order of H div
From playlist Abstract Algebra
1,010,010,101,000,011 - #MegaFavNumbers
This is my submission to the #megafavnumbers project. My number is 1010010101000011, which is prime in bases 2, 3, 4, 5, 6 and 10. I've open-sourced my code: https://bitbucket.org/Bip901/multibase-primes Clarification: by "ignoring 1" I mean ignoring base 1, since this number cannot be fo
From playlist MegaFavNumbers
Math: What Every 5th Grader Should Know (4 of 5) Subtraction of Double Digit Numbers: 4
Visit http://ilectureonline.com for more math and science lectures! In this video I will show how to quickly subtract a double digit number from a triple digit number: 1. Next video in this series can be seen at: https://youtu.be/qv0vzyp73Ok
From playlist iLecturesOnline: What Every 5th Grader Should Know about Math
Lepton Number Conservation | Standard Model of Particle Physics
The Standard Model of particle physics contains two kinds of particles: fermions and bosons. All fermions have half-integer spin and are again separated into two categories: quarks and leptons. Among those, there are three categories, so-called generations. And for bosons, particles carryi
From playlist Particle Physics
Squaring Numbers with Digits of 1
#shorts This video shows a pattern when squaring number with digits of 1.
From playlist Math Shorts
Weak Nuclear Force and Standard Model of Particle Physics
Standard Model, Chirality, Helicity, W & Z bosons, and the Weak Nuclear Force. My Patreon page is at https://www.patreon.com/EugeneK
From playlist Physics
Searches for Heavy neutrinos, Leptoquarks, Seesaw at the LHC by Halil Saka
DISCUSSION MEETING HUNTING SUSY @ HL-LHC (ONLINE) ORGANIZERS Satyaki Bhattacharya (SINP, India), Rohini Godbole (IISc, India), Kajari Majumdar (TIFR, India), Prolay Mal (NISER-Bhubaneswar, India), Seema Sharma (IISER-Pune, India), Ritesh K. Singh (IISER-Kolkata, India) and Sanjay Kumar S
From playlist HUNTING SUSY @ HL-LHC (ONLINE) 2021
Can leptogenesis explain why there's something instead of nothing?
"Why there is something, rather than nothing?" is a timeless question in both science and philosophy. In this video, Fermilab's Dr. Don Lincoln explains the theory of leptogenesis, which might be the answer. The Deep Underground Neutrino Experiment is Fermilab's flagship program, which w
From playlist Neutrinos
Review of searches for Long-Lived Particles with CMS by Alberto Escalante
Discussion Meeting : Hunting SUSY @ HL-LHC (ONLINE) ORGANIZERS : Satyaki Bhattacharya (SINP, India), Rohini Godbole (IISc, India), Kajari Majumdar (TIFR, India), Prolay Mal (NISER-Bhubaneswar, India), Seema Sharma (IISER-Pune, India), Ritesh K. Singh (IISER-Kolkata, India) and Sanjay Kuma
From playlist HUNTING SUSY @ HL-LHC (ONLINE) 2021
SUSY and Particle Physics, Part 2 - Nima Arkani-Hamed
SUSY and Particle Physics, Part 2 Nima Arkani-Hamed Institute for Advanced Study July 26, 2010
From playlist PiTP 2010
PiTP-Supersymmetric Grand Unification, Part 1 - Stuart Raby
PiTP-Supersymmetric Grand Unification, Part 1 Stuart Raby The Ohio State University July 14, 2008
From playlist PiTP 2008
What IS a Cross Section pt. 2: Differential Cross Sections in Particle Physics
Today I discuss how the interpretation of the cross section changes when we both turn on interactions and quantum mechanics. I discuss the importance of the differential cross section in particle physics with a couple examples, including how they can be used as evidence for the existence o
From playlist What is a cross section?
Supersymmetry at Low Energy Scales by Sourav Roy
Candles of Darkness DATE: 05 June TIME2017 to 09 June 2017 VENUE:Ramanujan Lecture Hall, ICTS Bangalore DARK MATTER AND THE SEARCH FOR PHYSICS BEYOND THE STANDARD MODEL "Darkness is your candle. Your boundaries are your quest."- Jalal-ud-din Rumi of Balkh (1207 - 1273) High energy Phys
From playlist Candles of Darkness
My #MegaFavNumbers is 2^82589933-1 // The largest Mersenne prime…..yet
This video is part of the #MegaFavNumbers series where a tonne of math youtubers like @numberphile @standupmaths and @3blue1brown share their favourite MEGA numbers, i.e. numbers over a million. Check out the full playlist here: https://www.youtube.com/playlist?list=PLar4u0v66vIodqt3KSZPs
From playlist MegaFavNumbers
Neutrino Physics III - André de Gouvêa
Prospects in Theoretical Physics Particle Physics at the LHC and Beyond Topic: Neutrino Physics III Speaker: André de Gouvêa Date: July 21th, 2017
From playlist PiTP 2017