Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/12463
Title: Renormalization group improvement of the nonrelativistic RQCD Lagrangian and heavy quarkonium spectrum
Author: Pineda, Antonio
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
Related resource: http://dx.doi.org/10.1103/PhysRevD.65.074007
URI: http://hdl.handle.net/2445/12463
ISSN: 0556-2821
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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