What is negative energy as used by Dirac to explain pair production?
51435
What was missing in Dirac's argument to come up with the modern interpretation of the positron?
41209
Does matter with negative mass exist?
72287
How does gamma-gamma pair production really work?
151039
Why are there no elementary charged, spin-zero particles?
82894
Why cannot fermions have non-zero vacuum expectation value?
134718
Why is there extra minus sign in Feynman's rules for every closed fermionic loop?
70682
Mechanism of pair production and annihilation of matter
95836
Why is the electric field is the negative gradient of potential energy function?
123054
How can we have negative work in electrostatics, if $W=(\epsilon_0/2)\int\! E^2\ \mathrm{d}\tau$?
101727
Dirac's remark that inspired Feynman when formulating path integral
112308
Why is the gravitational potential energy defined as negative?
117748
binding energy of a nucleus is positive?
80596
Ambiguities in the energy-momentum tensor
40485
Benefits and Drawbacks of Swapping Associations of Positivity and Negativity of the Proton and Electron
34280
Why does the quarks binding energy add mass to nucleons instead of reducing it?
148463
How do I get the negative sign in the expression for Gravitational Potential Energy?
52827
Could negative dimension ever make sense?