Low moments of the four-loop splitting functions in QCD
Low moments of the four-loop splitting functions in QCD
复制标题
QCD中四环分裂函数的低矩
DOI:
10.1016/j.physletb.2021.136853
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发表时间:
2022
影响因子:
4.4
通讯作者:
Vogt A.
中科院分区:
文献类型:
--
作者:
Moch S.;Ruijl B.;Ueda T.;Vermaseren J.A.M.;Vogt A.
We have computed the four lowest even-N moments of all four splitting functions for the evolution of flavour-singlet parton densities of hadrons at the fourth order in the strong coupling constant α s. The perturbative expansion of these moments, and hence of the splitting functions for momentum fractions x≳ 0.1, is found to be well behaved with relative α s-coefficients of order one and sub-percent effects on the scale derivatives of the quark and gluon distributions at α s≲ 0.2. More intricate computations, including other approaches such as the operator-product expansion, are required to cover the full x-range relevant to LHC analyses. Our results are presented analytically for a general gauge group for detailed checks and validations of such future calculations.
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DOI:
10.1016/j.nuclphysb.2016.12.012
发表时间:
2016
期刊:
Nuclear Physics
影响因子:
--
作者:
J. Davies;A. Vogt;B. Ruijl;Takahiro Ueda;J. Vermaseren
通讯作者:
J. Vermaseren
DOI:
10.1016/j.nuclphysb.2004.03.030
发表时间:
2004-03
期刊:
--
影响因子:
--
作者:
S. Moch;J. Vermaseren;A. Vogt
通讯作者:
S. Moch;J. Vermaseren;A. Vogt
影响因子:
4.4
作者:
F. Herzog;S. Moch;B. Ruijl;T. Ueda;J.A.M. Vermaseren;A. Vogt
通讯作者:
A. Vogt
影响因子:
4.4
作者:
S. Moch;B. Ruijl;Takahiro Ueda;J. Vermaseren;A. Vogt
通讯作者:
S. Moch;B. Ruijl;Takahiro Ueda;J. Vermaseren;A. Vogt
DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
S. A. Larin;T. V. Ritbergen;J. Vermaseren
通讯作者:
J. Vermaseren