# name
Renormalization group improvement of the nonrelativistic RQCD Lagrangian and heavy quarkonium spectrum

# metadata.dc.description.abstract[].value
We complete the leading-log renormalization group scaling of the nonrelativistic (NRQCD) Lagrangian at 
O
(
1
/
m
2
)
.
 The next-to-next-to-leading-log renormalization group scaling of the potential NRQCD Lagrangian (as far as the singlet is concerned) is also obtained in the situation 
m
α
s
≫
Λ
QCD
.
 As a by-product, we obtain the heavy quarkonium spectrum with the same accuracy in the situation 
m
α
2
s
≳
Λ
QCD
.
 When 
Λ
QCD
≪
m
α
2
s
,
 this is equivalent to obtain the whole set of 
O
(
m
α
(
n
+
4
)
s
ln
n
α
s
)
 terms in the heavy quarkonium spectrum. The implications of our results in the nonperturbative situation 
m
α
s
∼
Λ
QCD
 are also mentioned.

# metadata.dc.relation.isformatof[].value
Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.65.074007

# metadata.dc.source[].value
Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Renormalization group improvement of the nonrelativistic RQCD Lagrangian and heavy quarkonium spectrum