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.
Graduate Use of tensor densities in coordinate transformation
  • aeson25
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Undergrad What are the "central/axiomatic equations of physics" from which....
  • want2graduate
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Undergrad What is the role of the divergence theorem in deriving local laws in physics?
  • dRic2
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Graduate Is M-Theory more fundamental than String Theory?
  • S Beck
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Graduate Definition of the Lagrangian finite strain tensor
  • albus
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Undergrad Why do we ignore the contribution to a surface integral from the point r=0?
  • Mike400
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High School If there is no multiverse then what is beyond the Universe?
  • multiversetheory
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Graduate A question about graviton self-interaction
  • Someguyoutthere
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Undergrad Data analysis for theoretical vs experimental results
  • TheBlueDot
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Undergrad Integral equation for large surfaces
  • Apashanka
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Graduate Question about Lorenz invariance and cluster decomposition
  • jordi
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Undergrad Why not a particle for charge?
  • Mayank Jately
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Undergrad Electrostatic in string theory or LQG
  • Philipsmett
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Undergrad Calculating Jacobian Determinant
  • Apashanka
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Undergrad A Quadrillion Standard Models from F-theory arxiv.org/pdf/1903.00009
  • Spinnor
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Graduate Is "Equal a priori Probabilities" the correct scientific approach?
  • J-H-C
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High School What's the status of supersymmetry
  • Trollfaz
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Graduate Vacuum energy in the Wess-Zumino model
  • nrqed
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Undergrad What is the relationship between the Hamiltonian and Lorentz invariance?
  • niko_.97
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Undergrad When should we take numerology seriously?
  • ohwilleke
  • · Replies 19 ·
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Undergrad Spacetime as emergent quantum phenomenon
  • Mary Poppins
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Graduate Charge in a Lie Group.... is it always a projection?
  • arivero
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High School Significance of the Planck Particle
  • Nathan Warford
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Undergrad Do Classical Physics Still Have Unsolved Problems?
  • BWV
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Undergrad Example of a theory that was right after 20 years of failures?
  • Marco Masi
  • · Replies 19 ·
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Graduate De Sitter Vacua in String Theory and KKLT
  • Jeffery Winkler
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Graduate Current Status of Loop Quantum Gravity: Successes, Failures & Open Questions
  • maline
  • · Replies 10 ·
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Undergrad Is something wrong with my understanding of Liouville's Theorem?
  • fox26
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High School Does a field with 0 value "exist"?
  • black hole 123
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Undergrad Noether's theorem for discrete symmetry
  • Dalor
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High School Taming Infinities: Examining Quantum Theory and Spacetime with Penrose
  • Cerenkov
  • · Replies 14 ·
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Undergrad Back to Muller's 'Now and the Flow of Time'
  • asimov42
  • · Replies 11 ·
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Undergrad The Lagrangian and the second derivative?
  • filip97
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Graduate On the Refined Index of BPS states
  • kdv
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Graduate On non-perturbative renormalization and gravity
  • Angel Kld
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Graduate Quantization isn't fundamental
  • Auto-Didact
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Undergrad Understanding the definition of a soliton
  • Robin04
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High School Tensor Conventions: V^*⊗V^*⊗V (1,2) vs (2,1)
  • fresh_42
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Graduate PDE: Between Physics and Mathematics
  • Auto-Didact
  • · Replies 6 ·
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Graduate Lagrange Densities: Intuitive Understanding
  • Higgsono
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Undergrad What can we gain/learn by knowing the Higg boson completely?
  • seazal
  • · Replies 30 ·
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Undergrad How to derive Nielsen equation from Lagrange equation?
  • AlephClo
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Undergrad Information Paradox in Black Holes and BSM
  • seazal
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High School Why are we trying to unify all the physical forces?
  • Avalon_18
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Graduate Fine structure and fixed points
  • mitchell porter
  • · Replies 16 ·
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Graduate Non-locality: sheaf cohomology
  • Auto-Didact
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Graduate Can String Theory Explain Fundamental Particles Through Standing Waves?
  • alantheastronomer
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Undergrad Help me understand convolutions and Green's functions
  • jack476
  • · Replies 10 ·
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Undergrad Understanding the stress-energy tensor
  • Higgsono
  • · Replies 6 ·
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Undergrad Volume in phase space- Louviles theorem
  • QuasarBoy543298
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Graduate Foundation of the laws of physics
  • Twodogs
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Graduate Is GR fundamentally different from QM's interpretations?
  • MathematicalPhysicist
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Undergrad ER=EPR baby steps: causation or not?
  • nomadreid
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Undergrad What is the 'formal' definition for Total Derivative?
  • SebastianRM
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Graduate Simulating Quantum Loop Theory: Can S-Knots Be Represented Numerically?
  • kroni
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Graduate Different gauge coupling constants
  • Roy_1981
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Graduate Taxonomy of Theories in Theoretical Physics
  • Auto-Didact
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Undergrad Intuition for why d<p>/dt = -dV(<x>)/dx
  • EquationOfMotion
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Graduate A question about the amplituhedron
  • nrqed
  • · Replies 6 ·
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Graduate Rund_Trautman Identity for fields
  • PeroK
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Undergrad Is there any theoretical basis for laws being 2nd order
  • Hiero
  • · Replies 16 ·
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High School Looking for a citation of Nima Arkani-Hamed
  • Aidyan
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High School What is the fundamental nature of matter and energy?
  • kolleamm
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High School Is it possible to stop the graviton?
  • Josiah
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Graduate Quantum Gravity Research Group -- any standing in mainstream Physics?
  • andrew s 1905
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Graduate What Are Examples of Lagrangians in Various Disciplines?
  • JTC
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Undergrad Fundamental equation in string theory
  • kent davidge
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Undergrad Is the composite Higgs still a thing?
  • arivero
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Undergrad Limits of the variatonal principle
  • Umaxo
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Undergrad Is there new LHC data on coupling constant running?
  • ohwilleke
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Undergrad Compatibility of Physics and Abstract Algebra
  • TRB8985
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Graduate Dark Matter and Baryon Asymmetry: Is It Possible?
  • kelly0303
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Graduate Does the unforced quartic oscillator behave chaotically?
  • L_landau
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Undergrad Lattice standard model (Wang & Wen)
  • atyy
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Graduate Publish a Theory: An Alternative Gravity & Dark Matter Explained
  • PhDnotForMe
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Graduate Numerology from Vafa and Visser
  • mitchell porter
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Graduate Status of large higher dimensions
  • Anne Ross
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Undergrad Boltzmann equation and Hamiltonian
  • Malamala
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Undergrad SUSY and GUTs all but eliminated by latest ACME experiment
  • MrRobotoToo
  • · Replies 5 ·
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Graduate Summation Index Notation in the Transformation Equations
  • sams
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Undergrad Mathematical series in physics - Why and when do we need them?
  • k.udhay
  • · Replies 13 ·
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Undergrad Does the Principle of Least Action Have a Physical Meaning?
  • crastinus
  • · Replies 90 ·
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Graduate No metastable type IIB de Sitter vacua
  • Urs Schreiber
  • · Replies 73 ·
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Graduate Chain Rule in Lagrangian Transformation
  • SEGFAULT1119
  • · Replies 3 ·
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Graduate Quantum Gravity -- intro papers for 2nd year MSc student?
  • YellowBiro
  • · Replies 4 ·
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Graduate Does it make sense to break T duality at fundamental level?
  • JG11
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Undergrad Do gravitons have frequency, like photons?
  • cuallito
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Undergrad Why Is Energy Defined as E=mc^2 and Not Another Dimension?
  • rootone
  • · Replies 5 ·
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Graduate Baroque neutrinos and Zee-Babu model
  • mitchell porter
  • · Replies 1 ·
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Undergrad Theories without Fundamental Space and Time
  • kiki_danc
  • · Replies 50 ·
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Undergrad How credible are CKM matrix limits on new physics?
  • ohwilleke
  • · Replies 4 ·
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Undergrad General definition of spatial dimension?
  • nomadreid
  • · Replies 11 ·
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Undergrad Is each path in a phase portrait unique?
  • crastinus
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Undergrad Summation convention with expressions containing parentheses
  • emq
  • · Replies 3 ·
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Undergrad Why do the signs alternate when using Gauss' law for gravity?
  • TimeRip496
  • · Replies 4 ·
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Graduate Nuclear Processes in Other Universes: Varying the Strength of the Weak Force
  • jeffery_winkler
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Undergrad A Question about the Lagrangian
  • sams
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Graduate Hardy's approach to quantum gravity and QM interpretation
  • kith
  • · Replies 37 ·
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Undergrad How do we justify "Natural" Units
  • quickAndLucky
  • · Replies 9 ·
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Graduate What Constitutes a Natural Completion of a Physical Theory?
  • Auto-Didact
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