Beyond the Standard Models Forum

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Join expert and advanced topics on beyond the standard model of physics. This includes professionally researched theories like strings, branes, and LQG. Mainstream physics only.
Undergrad How did the theory of quantum gravity begin?
  • south
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Graduate Does Gravity Criticism in Maxwell's Equations Apply to All Gravity-Medium Analogies?
  • Jerome Wang
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Graduate Magnetic Monopole's (non)existence
  • mad mathematician
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Graduate "Particle Creation by Black Holes", S. Hawking
  • antaris
  • · Replies 7 ·
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High School Can I have $5 Million for my Knowledge
  • Jendemy
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Undergrad Should the third term in equation (3.11.18) be multiplied by half?
  • mad mathematician
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High School Is mathematics incapable of describing physics in its entirety?
  • dom_quixote
  • · Replies 21 ·
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Undergrad About the meaning "on-shell" vs "off-shell" in Hamiltonian mechanics
  • cianfa72
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Undergrad Is Gravity a Force or Curvature?
  • jazamm
  • · Replies 20 ·
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Undergrad What is fine tuning in physics/science?
  • Lynch101
  • · Replies 10 ·
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Undergrad How did they reach this conclusion regarding the coefficients?
  • kirito_01
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Graduate How many known Constructive QFTs are there?
  • mad mathematician
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Graduate Could the Gravitational Constant G have a quantum origin?
  • Lasand
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Undergrad Principle of minimum action and application to real problems
  • cianfa72
  • · Replies 9 ·
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Undergrad Was Dyson Correct That Detecting A Single Graviton Theoretically Impossible?
  • ohwilleke
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Graduate The Emergence of Space-time in String Theory
  • bhobba
  • · Replies 33 ·
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Graduate Non commutator of symmetries giving rise to a gauge symmetry
  • binbagsss
  • · Replies 7 ·
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Undergrad The evaporation of charged black holes
  • atyy
  • · Replies 8 ·
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Graduate Is There a Six-Preon Theory with Specific Charge and Color Assignments?
  • arivero
  • · Replies 70 ·
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Undergrad Noether's Theorem for Translation in Field Theory
  • binbagsss
  • · Replies 8 ·
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Graduate Various questions on Galilean group (boosts and spatial translations)
  • binbagsss
  • · Replies 14 ·
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Undergrad CP violation, Tunnelling effect, and Cherenkov radiation
  • member 753608
  • · Replies 18 ·
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Undergrad Universal Gravity without Shell Theorem
  • physics4all
  • · Replies 13 ·
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Undergrad Mathematical disagreement with inverse square law?
  • enslay
  • · Replies 33 ·
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Undergrad The standard model from loop quantum gravity via spinors octonions
  • kodama
  • · Replies 26 ·
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Graduate String theory: gravitons for closed strings vs. open strings
  • zb23
  • · Replies 1 ·
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Undergrad Besides magnetic monopoles, what else doesn’t exist?
  • Maximum7
  • · Replies 12 ·
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Graduate Recent history of minimal length scale?
  • arivero
  • · Replies 9 ·
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Graduate How to intuitively think of translations and Galilean boosts commuting?
  • binbagsss
  • · Replies 15 ·
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Undergrad 2D Ising Model Average Number of Domain Walls
  • thatboi
  • · Replies 0 ·
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Graduate On the same origin of quantum physics and general relativity
  • dipstik
  • · Replies 25 ·
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High School On a basic level why aren't loops ##\equiv## strings?
  • billtodd
  • · Replies 4 ·
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Undergrad Dimensions: Perpendicular vs. Coiled Up?
  • wittgenstein
  • · Replies 16 ·
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Undergrad Two recent tests of loop quantum gravity theory
  • kodama
  • · Replies 15 ·
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Undergrad Status of the X17 search with the MEG II apparatus
  • kodama
  • · Replies 1 ·
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Undergrad Classical Field Theory - Something isn't clicking
  • hawkdron496
  • · Replies 12 ·
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Undergrad Unifying string theory and loop quantum gravity
  • kodama
  • · Replies 2 ·
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High School Questions about Noether's theorem -- Conservation of Energy and Mass
  • Agent Smith
  • · Replies 9 ·
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Graduate Singularity structure being valid for all QFTs?
  • Suekdccia
  • · Replies 6 ·
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Undergrad Solve equation from dimensional analysis: 3 eq., 6 unknowns
  • phillip_at_work
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High School Dimensional analysis peculiarity
  • av163
  • · Replies 6 ·
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Undergrad About the results of trying to build quantum gravity from gravito-EM
  • tade
  • · Replies 8 ·
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Undergrad Evaporating black holes and conservation of charges?
  • Suekdccia
  • · Replies 14 ·
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Undergrad Noether's theorem for point particles
  • William Crawford
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Undergrad Is this derivation of MOND from General Relativity plausible?
  • kodama
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Undergrad Could the emission of 2 gravitons in orbits possibly be supressed?
  • Suekdccia
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Undergrad Could there be new particles after the Universe reaches heat death?
  • Suekdccia
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Undergrad Will every object in the universe evaporate?
  • Suekdccia
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Graduate Towards a purely gravitational effective theory of dark matter
  • mitchell porter
  • · Replies 14 ·
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Undergrad Can there be quantum fluctuations without spacetime?
  • Suekdccia
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Undergrad What's the interpretation of the third term F(t)q?
  • Raffealla
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  • Poll Poll
Undergrad Belle II Measurement Makes World Average Tau Mass Match Koide's Rule
  • ohwilleke
  • · Replies 12 ·
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Undergrad Jonathan Oppenheim, "A postquantum theory of classical gravity?"
  • kodama
  • · Replies 15 ·
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Graduate New string formulae for Higgs mass and cosmological constant
  • mitchell porter
  • · Replies 6 ·
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Graduate A possible quantum field theory of tachyons?
  • PeterDonis
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Graduate Does the Maximum Lyapunov exponent depend on the eigenvalues?
  • codebpr
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Graduate Discussing the Sachdev–Ye–Kitaev Model
  • Demystifier
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Undergrad Grand Unified Theory and proton decay
  • Ranku
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Graduate "The 7 Strangest Coincidences in the Laws of Nature" (S. Hossenfelder)
  • mitchell porter
  • · Replies 62 ·
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Undergrad Does the EM field arise from the Kalb-Ramond field?
  • p78653
  • · Replies 1 ·
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Undergrad Experiments to check for extra dimensions
  • billtodd
  • · Replies 14 ·
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Graduate Why is matter-free gravity not ultraviolet finite?
  • Jim Kata
  • · Replies 13 ·
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Undergrad Are There GUTs Where the Proton Never Decays?
  • billtodd
  • · Replies 16 ·
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High School Extending the Lagrangian of a double pendulum to more complex systems
  • KataruZ98
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Undergrad Does a Magnetic Monopole with Spin Create an Electric Dipole?
  • DuckAmuck
  • · Replies 6 ·
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Graduate Classifying quarks and leptons using LCTs representation
  • Mich24
  • · Replies 4 ·
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Graduate Uncovering the Combinatorial Origins of Yang-Mills Theory?
  • mitchell porter
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Undergrad Conservation of energy in quantum gravity
  • KleinMoretti
  • · Replies 27 ·
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Graduate A question from Superspace and 1001 lessons
  • billtodd
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Undergrad Lecture notes on SUSY using finite matrix as example?
  • arivero
  • · Replies 1 ·
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Undergrad Finding Escape Velocity of mass (m) with electrostatic and gravitational influences
  • PhysicsEnjoyer31415
  • · Replies 17 ·
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Undergrad Seifert -Solutions of Einstein's equations give flat galactic rotation curves
  • timmdeeg
  • · Replies 14 ·
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Graduate Kaluza Klein and non-abelian gauge transformation
  • LCSphysicist
  • · Replies 3 ·
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Graduate Repeated measurements and granular space time
  • Heidi
  • · Replies 4 ·
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Graduate Quantum Groups as a Generalization of String Theory
  • billtodd
  • · Replies 5 ·
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Undergrad Supressing black hole evaporation?
  • Suekdccia
  • · Replies 15 ·
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Undergrad Neutrinos and theoretical necessity
  • marce
  • · Replies 29 ·
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High School Interactive visualization of the Hopf fibration
  • vladramen
  • · Replies 0 ·
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Undergrad What's the physical meaning of Curl of Curl of a Vector Field?
  • PLAGUE
  • · Replies 5 ·
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Undergrad Double slit with particles so heavy that they curve spacetime
  • greypilgrim
  • · Replies 5 ·
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Undergrad If we had a TOE, would we be able to explain why there is something rather than nothing?
  • cosmanino2050
  • · Replies 2 ·
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Graduate String theory and locality of small dimensions
  • marce
  • · Replies 1 ·
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High School New hypothesis of continuous wave function collapse
  • jasciu
  • · Replies 5 ·
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Undergrad Holographic principle in continuous spacetime?
  • Suekdccia
  • · Replies 8 ·
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Undergrad Energy created out of nothing in Objective collapse theory?
  • KleinMoretti
  • · Replies 13 ·
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Graduate Higgs inflation and quadratic gravity
  • mitchell porter
  • · Replies 1 ·
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Undergrad Green's function boundary conditions
  • deuteron
  • · Replies 1 ·
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Undergrad Expansion of 1/|x-x'| into Legendre Polynomials
  • deuteron
  • · Replies 1 ·
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Undergrad If there ever will be a theory of Quantum Gravity which is testable...
  • billtodd
  • · Replies 6 ·
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Undergrad String theory vs Quantum field theory
  • KleinMoretti
  • · Replies 1 ·
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Undergrad Lagrangian density of a linearly elastic string under gravity
  • pines-demon
  • · Replies 6 ·
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Graduate Continuity of a quantity in a conical system to determine the velocity
  • tworitdash
  • · Replies 0 ·
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High School What ever happened to Classical Unified Field Theory?
  • Rick16
  • · Replies 1 ·
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Undergrad Physics equations with the mathematical constant Phi?
  • ole cram
  • · Replies 4 ·
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Undergrad Expanding around 0 for multipole expansion
  • deuteron
  • · Replies 4 ·
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Undergrad What does "transforms covariantly" mean here?
  • Hill
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High School What is the physical significance of mass-time-length equivalences in physics?
  • mister i
  • · Replies 8 ·
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Undergrad Anomalous contribution to galactic rotation curves due to stochastic s
  • kodama
  • · Replies 2 ·
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Graduate Basic Scheme and Fundamental Equations of String Theory
  • masteralien
  • · Replies 26 ·
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High School What is currently known about fields other than gravitation?
  • mister i
  • · Replies 11 ·
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