Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hadron energy spectrum in polarized top quark decays considering the
  effects of hadron and bottom quark masses   We present the analytical expressions for the next-to-leading order
corrections to the partial decay width $t(\uparrow) \rightarrow bW^+$, followed
by $b\rightarrow H_bX$, for nonzero b-quark mass ($m_b\neq 0$) in the
fixed-flavor-number scheme (FFNs). To make the predictions for the energy
distribution of outgoing hadrons $H_b$, as a function of the normalized
$H_b$-energy fraction $x_H$, we apply the general-mass variable-flavor-number
scheme (GM-VFNs) in a specific helicity coordinate system where the
polarization of top quark is evaluated relative to the b-quark momentum. We
also study the effects of gluon fragmentation and finite hadron mass on the
hadron energy spectrum so that hadron masses are responsible for the low-$x_H$
threshold. In order to describe both the b-quark and the gluon hadronizations
in top decays we apply realistic and nonperturbative fragmentation functions
extracted through a global fit to $e^+e^-$ annihilation data from CERN LEP1 and
SLAC SLC by relying on their universality and scaling violations.

10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn