Resummed small-x and first-moment evolution of fragmentation functions in perturbative QCD
Resummed small-x and first-moment evolution of fragmentation functions in perturbative QCD
复制标题
微扰 QCD 中碎片函数的小 x 和一阶矩演化的恢复
DOI:
10.1007/jhep10(2012)033
复制
发表时间:
2012
影响因子:
5.4
通讯作者:
K. Yeats
中科院分区:
文献类型:
--
作者:
C. Kom;A. Vogt;K. Yeats
A bstractWe study the splitting functions for the evolution of fragmentation distributions and the coefficient functions for single-hadron production in semi-inclusive e+e− annihilation in massless perturbative QCD for small values of the momentum fraction and scaling variable x, where their fixed-order approximations are completely destabilized by huge double logarithms of the form $ \alpha_{\mathrm{s}}^n{x^{-1 }}\mathrm{l}{{\mathrm{n}}^{2n - a }}x $. Complete analytic all-order expressions in Mellin-N space are presented for the resummation of these terms at the next-to-next-to-leading logarithmic accuracy. The poles for the first moments, related to the evolution of hadron multiplicities, and the small-x instabilities of the next-to-leading order splitting and coefficient functions are removed by this resummation, which leads to an oscillatory small-x behaviour and functions that can be used at N = 1 and down to extremely small values of x. First steps are presented towards extending these results to the higher accuracy required for an all-x combination with the state-of-the-art next-to-next-to-leading order large-x results.
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DOI:
10.1016/j.cpc.2010.04.009
发表时间:
2010
期刊:
Comput. Phys. Commun.
影响因子:
--
作者:
M. Tentyukov;J. A. M. Vermaseren
通讯作者:
J. A. M. Vermaseren
影响因子:
2.8
作者:
Albino, S.;Bolzoni, P.;Kotikov, A. V.
通讯作者:
Kotikov, A. V.
DOI:
10.3204/desy-proc-2012-02/96
发表时间:
2012
期刊:
arXiv: High Energy Physics - Phenomenology
影响因子:
--
作者:
P. Bolzoni
通讯作者:
P. Bolzoni
影响因子:
2.8
作者:
Albino, S.;Bolzoni, P.;Kotikov, A.
通讯作者:
Kotikov, A.
影响因子:
2.8
作者:
Almasy, A. A.;Moch, S.;Vogt, A.
通讯作者:
Vogt, A.