Average gluon and quark jet multiplicities at higher orders
Average gluon and quark jet multiplicities at higher orders
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高阶平均胶子和夸克射流多重数
DOI:
10.1016/j.nuclphysb.2013.06.025
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发表时间:
2013
期刊:
影响因子:
--
通讯作者:
A. V. Kotikov
中科院分区:
文献类型:
--
作者:
P. Bolzoni;B. A. Kniehl;A. V. Kotikov
We develop a new formalism for computing and including both the perturbative and nonperturbative QCD contributions to the scale evolution of average gluon and quark jet multiplicities. The new method is motivated by recent progress in timelike small-x resummation obtained in the MS¯ factorization scheme. We obtain next-to-next-to-leading-logarithmic (NNLL) resummed expressions, which represent generalizations of previous analytic results. Our expressions depend on two nonperturbative parameters with clear and simple physical interpretations. A global fit of these two quantities to all available experimental data sets that are compatible with regard to the jet algorithms demonstrates by its goodness how our results solve a longstanding problem of QCD. We show that the statistical and theoretical uncertainties both do not exceed 5% for scales above 10 GeV. We finally propose to use the jet multiplicity data as a new way to extract the strong-coupling constant. Including all the available theoretical input within our approach, we obtain α s (5)(M z)= 0.1199±0.0026 in the MS¯ scheme in an approximation equivalent to next-to-next-to-leading order enhanced by the resummations of ln x terms through the NNLL level and of ln Q 2 terms by the renormalization group, in excellent agreement with the present world average.
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DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
P. Edén;Gosta Gustafson Dept. of Ther. Phys.;L. University;Sweden.
通讯作者:
Sweden.
影响因子:
5.4
作者:
C. Kom;A. Vogt;K. Yeats
通讯作者:
K. Yeats
影响因子:
5.4
作者:
A. Vogt
通讯作者:
A. Vogt
DOI:
--
发表时间:
2011
期刊:
影响因子:
--
作者:
S. Albino;P. Bolzoni;B. Kniehl;A. Kotikov
通讯作者:
A. Kotikov
DOI:
--
发表时间:
1989
期刊:
影响因子:
--
作者:
W. Braunschweig;R. Gerhards;F. J. Kirschfink;H. Martyn;B. Bock;H. Fischer;H. Hartmann;J. Hartmann;E. Hilger;A. Jocksch;R. Wedemeyer;B. Foster;A. Martin;E. Bernardi;J. Chwastowski;A. Eskreys;K. Gather;K. Genser;H. Hulschig;P. Joos;H. Kowalski;A. Ladage;B. Löhr;D. Lüke;P. Mättig;D. Notz;J. Pawlak;K. ;E. Ros;D. Trines;R. Walczak;G. Wolf;H. Kolanoski;T. Kracht;J. Krüger;E. Lohrmann;G. Poelz;W. Zeuner;J. Hassard;J. Shulman;D. Su;I. Tomalin;F. Barreiro;A. Leites;J. Peso;M. Bowler;P. Burrows;R. Cashmore;G. Heath;M. Veitch;J. Hart;D. Saxon;S. Brandt;M. Holder;Y. Eisenberg;U. Karshon;G. Mikenberg;A. Montag;D. Revel;E. Ronat;A. Shapira;N. Wainer;G. Yekutieli;D. Muller;S. Ritz;D. Strom;M. Takashima;S. Wu;G. Zobernig;Tasso Collaboration
通讯作者:
Tasso Collaboration