Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermi motion parameter $p_F$ of $B$ meson from relativistic quark model   The Fermi motion parameter $p_{_F}$ is the most important parameter of ACCMM
model, and the value $p_{_F} \sim 0.3$ GeV has been used without clear
theoretical or experimental evidence. So, we attempted to extract the possible
value for $p_{_F}$ theoretically in the relativistic quark model using quantum
mechanical variational method. We obtained $p_{_F} \sim 0.5$ GeV, which is
somewhat larger than 0.3, and we also derived the eigenvalue of $E_B \simeq
5.5$ GeV, which is is reasonable agreement with $m_B=5.28$ GeV.

34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th