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Title: N-jettiness beam functions at N3LO

Journal Article · · Journal of High Energy Physics (Online)
 [1];  [2];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Stanford Univ., CA (United States)

We present the first complete calculation for the quark and gluon N-jettiness ($$$$ {\mathcal{T}}_N $$$$ T N ) beam functions at next-to-next-to-next-to-leading order (N3LO) in perturbative QCD. Our calculation is based on an expansion of the differential Higgs boson and Drell-Yan production cross sections about their collinear limit. This method allows us to employ cutting edge techniques for the computation of cross sections to extract the universal building blocks in question. The class of functions appearing in the matching coefficents for all channels includes iterated integrals with non-rational kernels, thus going beyond the one of harmonic polylogarithms. Our results are a key step in extending the $$$$ {\mathcal{T}}_N $$$$ T N subtraction methods to N3LO, and to resum $$$$ {\mathcal{T}}_N $$$$ T N distributions at N3LL' accuracy both for quark as well as for gluon initiated processes.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
SC0011090
OSTI ID:
1712424
Alternate ID(s):
OSTI ID: 1711419
Journal Information:
Journal of High Energy Physics (Online), Vol. 2020, Issue 9; ISSN 1029-8479
Publisher:
Springer BerlinCopyright Statement
Country of Publication:
United States
Language:
English

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QCD Beyond Leading Power preprint January 2020

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