B-hadron fragmentation functions at next-to-next-to-leading order from a global analysis of e+e- annihilation data

被引：37

作者：

Salajegheh, Maral ^{[1
]}

Nejad, S. Mohammad Moosavi ^{[1
,3
]}

Khanpour, Hamzeh ^{[2
,3
]}

Kniehl, Bernd A. ^{[4
]}

Soleymaninia, Maryam ^{[3
]}

机构：

[1] Yazd Univ, Fac Phys, POB 89195-741, Yazd, Iran

[2] Univ Sci & Technol Mazandaran, Dept Phys, POB 48518-78195, Behshahr, Iran

[3] Inst Res Fundamental Sci IPM, Sch Particles & Accelerators, POB 19395-5531, Tehran, Iran

[4] Univ Hamburg, Inst Theoret Phys 2, Luruper Chaussee 149, D-22761 Hamburg, Germany

来源：

PHYSICAL REVIEW D | 2019年 / 99卷 / 11期

关键词：

O(ALPHA(2)(S)) CONTRIBUTIONS; QUARK FRAGMENTATION; QCD CORRECTIONS; EVOLUTION; DECAY; COLLISIONS;

D O I：

10.1103/PhysRevD.99.114001

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present nonperturbative fragmentation functions (FFs) for bottom-flavored (B) hadrons both at nextto-leading (NLO) and, for the first time, at next-to-next-to-leading order in the (MS) over bar factorization scheme with five massless quark flavors. They are determined by fitting all available experimental data of inclusive single B-hadron production in e(+)e(-) annihilation, from the ALEPH, DELPHI, and OPAL collaborations at CERN LEP1 and the SLD collaboration at SLAC SLC. The uncertainties in these FFs as well as in the corresponding observables are estimated using the Hessian approach. We perform comparisons with available NLO sets of B-hadron FFs. We apply our new FFs to generate theoretical predictions for the energy distribution of B hadrons produced through the decay of unpolarized or polarized top quarks, to be measured at the CERN LHC.

引用

页数：8

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