Editing Regge theory (section)

{{Short description|Study of the analytic properties of scattering amplitudes}}
In [[quantum physics]], '''Regge theory''' ({{IPAc-en|ˈ|r|ɛ|dʒ|eɪ}} {{respell|REJ|ay}}, {{IPA|it|ˈrɛddʒe|lang}}) is the study of the analytic properties of [[scattering]] as a function of [[angular momentum#Angular momentum in quantum mechanics|angular momentum]], where the angular momentum is not restricted to be an integer multiple of ''[[reduced Planck constant|ħ]]'' but is allowed to take any [[complex number|complex value]]. The nonrelativistic theory was developed by [[Tullio Regge]] in 1959.<ref>{{cite journal | last=Regge | first=T. | title=Introduction to complex orbital momenta | journal=Il Nuovo Cimento | publisher=Springer Science and Business Media LLC | volume=14 | issue=5 | year=1959 | issn=0029-6341 | doi=10.1007/bf02728177 | pages=951–976| bibcode=1959NCim...14..951R | s2cid=8151034 }}</ref>