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http://hdl.handle.net/2445/12418
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DC Field | Value | Language |
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dc.contributor.author | Pineda, Antonio (Pineda Ruiz) | cat |
dc.contributor.author | Soto Riera, Joan | cat |
dc.date.accessioned | 2010-05-06T10:46:42Z | - |
dc.date.available | 2010-05-06T10:46:42Z | - |
dc.date.issued | 1996 | cat |
dc.identifier.issn | 0556-2821 | cat |
dc.identifier.uri | http://hdl.handle.net/2445/12418 | - |
dc.description.abstract | We use Heavy Quark Effective Theory (HQET) techniques to parametrize certain non-perturbative effects related to quantum fluctuations that put both heavy quark and antiquark in quarkonium almost on shell. The large off-shell momentum contributions are calculated using Coulomb type states. The almost on-shell momentum contributions are evaluated using an effective 'chiral' lagrangian which incorporates the relevant symmetries of the HQET for quarks and antiquarks. The cut-off dependence of both contributions matches perfectly. The decay constants and the matrix elements of bilinear currents at zero recoil are calculated. The new non-perturbative contributions from the on-shell region are parametrized by a single constant. They turn out to be $O(\alpha^2/\Lambda_{QCD} a_{n})$, $a_{n}$ being the Bohr radius and $\alpha$ the strong coupling constant, times the non-perturbative contribution coming from the multipole expansion (gluon condensate). We discuss the physical applications to $\Upsilon$, $J/\Psi$ and $B_{c}$ systems. | - |
dc.format.extent | 15 p. | cat |
dc.format.mimetype | application/pdf | eng |
dc.language.iso | eng | eng |
dc.publisher | The American Physical Society | eng |
dc.relation.isformatof | Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevD.53.3983 | cat |
dc.relation.ispartof | Physical Review D, 1996, vol. 53, núm. 7, p. 3983-3997 | cat |
dc.relation.uri | http://dx.doi.org/10.1103/PhysRevD.53.3983 | - |
dc.rights | (c) The American Physical Society, 1996 | eng |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Pertorbació (Dinàmica quàntica) | cat |
dc.subject.classification | Quarks | cat |
dc.subject.other | Perturbation (Quantum dynamics) | eng |
dc.subject.other | Quarks | eng |
dc.title | Heavy quark hadronic Lagrangian for s-wave quarkonium | eng |
dc.type | info:eu-repo/semantics/article | eng |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 112033 | cat |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
Files in This Item:
File | Description | Size | Format | |
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112033.pdf | 336.89 kB | Adobe PDF | View/Open |
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