Idealization in Quantum Field Theory - Philsci
... 1980). Some of these assumptions may be inspired by a Type B Theory, others may even contradict the relevant theory (in case there is any). Theory (of Type A or B) here serves as one tool for the construction of models (Cartwright et al. 1995). How does a phenomenological model relate to theory? Two ...
... 1980). Some of these assumptions may be inspired by a Type B Theory, others may even contradict the relevant theory (in case there is any). Theory (of Type A or B) here serves as one tool for the construction of models (Cartwright et al. 1995). How does a phenomenological model relate to theory? Two ...
Quantum gravitational contributions to quantum electrodynamics
... In the standard model of particle physics gravity is usually ignored as it plays an inessential role in most calculations of interest. Additionally, if we view Einstein’s theory of gravity as a fundamental theory it exhibits the undesirable property of non-renormalisability 5–9 , and hence lacks the ...
... In the standard model of particle physics gravity is usually ignored as it plays an inessential role in most calculations of interest. Additionally, if we view Einstein’s theory of gravity as a fundamental theory it exhibits the undesirable property of non-renormalisability 5–9 , and hence lacks the ...
Untitled
... particles known as fermions, and their anti-particles2. Fermions are characterized by the property that they possess half a quantum unit of intrinsic rotation, or spin, implying that their quantum-theoretical description is not invariant when they are rotated through 360 , but only after rotation t ...
... particles known as fermions, and their anti-particles2. Fermions are characterized by the property that they possess half a quantum unit of intrinsic rotation, or spin, implying that their quantum-theoretical description is not invariant when they are rotated through 360 , but only after rotation t ...
Kang_3
... How are quarks and gluons distributed spatially? How do partons carry the proton spin-1/2? (spin and orbital angular momentum) How are these quark and gluon distributions correlated with overall nucleon properties, such as spin direction? ...
... How are quarks and gluons distributed spatially? How do partons carry the proton spin-1/2? (spin and orbital angular momentum) How are these quark and gluon distributions correlated with overall nucleon properties, such as spin direction? ...
Introduction to Particle Physics
... Why are there three generations, and not 42? Can the large number of free parameters in the SM (19 or even larger for massive s) be reduced? Why is the electric charge of electron and proton equal? Should the gauge couplings unify at high energies? In the SM they do not! Why are ~17 orders of magni ...
... Why are there three generations, and not 42? Can the large number of free parameters in the SM (19 or even larger for massive s) be reduced? Why is the electric charge of electron and proton equal? Should the gauge couplings unify at high energies? In the SM they do not! Why are ~17 orders of magni ...
chapter46
... The law of conservation of electron lepton number states that the sum of electron lepton numbers before the process must equal the sum of the electron lepton number after the process ...
... The law of conservation of electron lepton number states that the sum of electron lepton numbers before the process must equal the sum of the electron lepton number after the process ...
Five lectures on effective field theory
... when the kinematics allow for physical intermediate states. When that happens, the 1/(p2 − m2 ) propagators for the intermediate states become singular which leads to the nonanalytic behavior of the correlation function 1 . Once you realize that this is the source of most of the complicated behavior ...
... when the kinematics allow for physical intermediate states. When that happens, the 1/(p2 − m2 ) propagators for the intermediate states become singular which leads to the nonanalytic behavior of the correlation function 1 . Once you realize that this is the source of most of the complicated behavior ...
