HELICITY CONTRIBUTIONS OF W+-BOSON IN ENERGY DISTRIBUTION OF B-HADRON IN TOP QUARK DECAY

被引:0
作者
Nejad, S. M. Moosavi [1 ,2 ]
Kniehl, B. A. [3 ]
Kramer, G. [3 ]
机构
[1] Yazd Univ, Fac Phys, Yazd, Iran
[2] Inst Res Fundamental Sci IPM, Sch Particles & Accelerators, Tehran, Iran
[3] Univ Hamburg, Inst Theoret Phys 2, D-22761 Hamburg, Germany
来源
QUANTUM MECHANICS, ELEMENTARY PARTICLES, QUANTUM COSMOLOGY AND COMPLEXITY | 2011年
关键词
Perturbative QCD; fragmentation function; helicity; ZM-VFNS; PERTURBATION-THEORY; FRAGMENTATION; ANNIHILATION;
D O I
10.1142/9789814335614_0045
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We calculate the energy spectrum of the inclusive b-flavored hadrons in the decay of an unpolarized top quark into a bottom quark and a W+-boson at next-to-leading order (NLO). The helicity contributions of the W+-boson in the energy distribution of the B-hadron are determined. The helicities of the W+-boson are specified as longitudinal, transverse-plus and transverse-minus. In our calculation we apply the zero-mass variable-flavor-number scheme (ZM-VFNS) using realistic non-perturbative fragmentation functions obtained through a global fit to e(+)e(-) data from CERN LEP1 and SLAC SLC.
引用
收藏
页码:459 / 466
页数:8
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