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  1. cosmology - Baryon asymmetry - Physics Stack Exchange

    Baryon asymmetry refers to the observation that apparently there is matter in the Universe but not much antimatter. We don't see galaxies made of antimatter or observe gamma rays that would be prod...

  2. Origin of XRD Peak Asymmetry - Physics Stack Exchange

    Feb 28, 2019 · Ideally the peaks should be symmetric so my question is what is the main origin of asymmetry in the peaks? My best guess is it is some small misalignment which means one side of …

  3. What is $U(1)$ symmetry? - Physics Stack Exchange

    May 7, 2019 · Are you wondering what U (1) is, which is a mathematical term dealing with symmetry, or are you wondering how it applies to the standard model (which deals with electromagnitism)?

  4. big bang - Is the matter-antimatter asymmetry a logical or a ...

    May 21, 2024 · Nonetheless, matter-antimatter asymmetry is a major motivation for physicists to look for new physics beyond the Standard Model that violate baryon number and lepton number in a CP …

  5. What Does Up-Down Asymmetry Mean? - Physics Stack Exchange

    Apr 26, 2019 · So my question is, in the context of the article linked above, what does up-down asymmetry mean and what do particular numerical values of it mean (e.g. is the numerical value a …

  6. Gross asymmetry in Maxwell Equations - Physics Stack Exchange

    May 6, 2024 · Gross asymmetry in Maxwell Equations Ask Question Asked 1 year, 7 months ago Modified 1 year, 7 months ago

  7. Understanding time reversal symmetry in Classical Physics

    May 12, 2024 · You are blurring together two very different questions: (1) Are the equations time-symmetric? and (2) Is some particular solution to those equation time-reversible? (1) is what is …

  8. Introducing time asymmetry in the Boltzmann equation

    Aug 26, 2025 · By asserting that it was acceptable to ignore these correlations in the population at times after the initial time, Boltzmann had introduced an element of time asymmetry through the formalism …

  9. Why doesn't broken inversion symmetry imply piezoelectricity?

    Jun 21, 2022 · To see piezoelectricity in a crystalline material, you must have a crystal symmetry which is non-centrosymmetric (i.e. broken inversion symmetry). The reverse is almost always true (i.e. …

  10. cosmology - Why is it assumed that the Big Bang produced equal parts ...

    Jun 30, 2020 · Up to now, none B-violation process has ever been seen, CP-violations are actually present in the theory of the standard model. The last condition is only necessary to state that the …