Session A02: Precision Measurements in Particle Physics

Light Dark Vectors in FCNC Decays

The shift of future physics program from the energy frontier to the intensity frontier will enable probing light dark sectors with very high precision. Light dark vector acts as a minimal portal between the dark and visible sectors and is highly motivated in dark matter model propositions as well as for explanations of discrepancies observed in flavour physics experiments. In this talk I will take you through different light vector boson models and illustrate their fate in context to flavour changing neutral current decays of the B- and K-meson. Contrary to the findings of an earlier work, due to correct calculations of the FCNC amplitudes, we report that O(1) couplings are not required to fit the data on rare and flavour changing B and K decays. We study both on-shell and off-shell phenomenologies of the dark Z decays. Additionally, we also include a robust treatment of hadronic decays of dark Z in its width. However, we find that the allowed parameter region, in spite of providing a very good fit to the b → sl⁺l⁻ data, are ruled out from various other constraints from low energy measurements such as the atomic parity violation, K⁺ → µ⁺ + invisible decay, B_s mixing etc.   

Explaining CDF's large W-boson mass in neutrino models

The CDF collaboration has recently published a precision measurement of the W-boson mass that differs from the Standard Model prediction by seven standard deviations. This result can be explained with additional electroweak multiplets that either break the custodial symmetry or contribute to oblique parameters at loop level. Here, we discuss several well-motivated models along these lines that accommodate the CDF result and also give rise to neutrino masses, such as the type-II seesaw mechanism and the Zee model. These models lead to testable predictions at the LHC and in experiments looking for lepton flavor violation.   

a generally covariant generalization of the dirac equation that does not require gauges

Abstract:  In that regard Dirac in 1928 made his equation(1) flat space(2). But space is not in general flat, there are forces.

  So over the past 100 years people have had to try to make up for that mistake by adding adhoc convoluted gauge force after gauge force until theoretical physics became a mass of confusion, a train wreck, a junk pile. So all they can do for ever and ever is to rearrange that junk pile with zero actual progress in fundamental theoretical physics being made,.. forever.

  By the way note that Newpde (3) γ^μ√κ_μμ(∂ψ/∂x_μ)=(ω/c)ψ  is NOT flat space (4) so it cures this problem (5).

 

References  

(1)  γ^μ(∂ψ/∂x_μ)=(ω/c)ψ

(2) Spherical symmetry: (γ^x√κ_xxdx+γ^y√κ_yydy+γ^z√κ_zzdz+γ^t√κ_ttidt)²=κ_xxdx²+κ_yydy²+κ_zzdz²-κ_ttdt²

κ_xx=κ_yy=κ_zz=κ_tt=1 is flat space, Minkowski, as in his (above) Dirac equation.                   

(3)   γ^μ√κ_μμ(∂ψ/∂x_μ)=(ω/c)ψ  for e,v. So we didn’t just drop the κ_μν.

(4)Here κ_oo=1-r_H/r =1/κ_rr. r_H=2e²/mc². This New pde, with this κ_μν is derived from an Occam’s razor motivated assumption:  postuate1↔Newpde.

(5) In fact the third order Taylor expansion terms of that square root (√κ_μν) provide the Lamb shift and anomalous gyromagnetic ratio without the renormalization and infinities. The κ_μνalso provides the general covariance of the Newpde. Also the New pde composite 3e and composite e,v give us particle physics: the particle multiplets and Standard electroweak Model(SM) respectively.  

    

How Big is an Electron

This starts as a simple question.  How big is an electron?  Then a secondary issue arises.  What is a material definition of electric charge?  If we are seeking an answer that is compatible with the structure of an electron there are some problems that are either ignored or glossed over in most discussions of the topic.  Finally, by incorporating some geometric nuances with basic Schrodinger style quantum mechanics, suggestions emerge for a better understanding of sub-atomic structures in simplified terms.  The ideas are largely compatible with string theory or multidimensional concepts; however, that deeper level of analysis is not required in the fundamental discussions of this paper.  Finally, while spatial coordinates used in quantum physics are passively assumed to employ three-dimensional Cartesian coordinates, spherical coordinates and radial parameters, for each of the space and time domains, are better suited when dealing strictly with the structural aspects of sub-atomic particles. You will see a spherical coordinate structure applied to both space and time as that appears to give the proper balance to the two.