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Transverse momentum dependent fragmentation function at next-to–next-to–leading order

Echevarria, Miguel G. ; Scimemi, Ignazio ; Vladimirov, Alexey



Abstract

We calculate the unpolarized transverse momentum dependent fragmentation function at next-to-next-to-leading order, evaluating separately the transverse momentum dependent (TMD) soft factor and the TMD collinear correlator. For the first time, the cancellation of spurious rapidity divergences in a properly defined individual TMD beyond the first nontrivial order is shown. This represents a strong ...

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