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Title: | Renormalization group improvement of the nonrelativistic RQCD Lagrangian and heavy quarkonium spectrum |
Author: | Pineda, Antonio (Pineda Ruiz) |
Keywords: | Teoria de camps (Física) Partícules (Física nuclear) Renormalització (Física) Pertorbació (Dinàmica quàntica) Field theory (Physics) Particles (Nuclear physics) Renormalization (Physics) Perturbation (Quantum dynamics) |
Issue Date: | 2002 |
Publisher: | The American Physical Society |
Abstract: | 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. |
Note: | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.65.074007 |
It is part of: | Physical Review D, 2002, vol. 65, núm. 7, p. 074007-1-074007-10 |
URI: | http://hdl.handle.net/2445/12463 |
Related resource: | http://dx.doi.org/10.1103/PhysRevD.65.074007 |
ISSN: | 0556-2821 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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