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D$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |V$_{cb}$| in the heavy quark expansion
Summary of changes: The discussion of uncertainties in the 1/m.sub(Q) expansion was shortend as the more detailed one was presented in our recent paper ref.[16] and is due in the forthcoming paper [17]. The sections 3 and 4 are then combined.
| Autores principales: | , |
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| Lenguaje: | eng |
| Publicado: |
1993
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1007/BF01574165 http://cds.cern.ch/record/690675 |
| _version_ | 1780901976404393984 |
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| author | Bigi, Ikaros I.Y. Uraltsev, N.G. |
| author_facet | Bigi, Ikaros I.Y. Uraltsev, N.G. |
| author_sort | Bigi, Ikaros I.Y. |
| collection | CERN |
| description | Summary of changes: The discussion of uncertainties in the 1/m.sub(Q) expansion was shortend as the more detailed one was presented in our recent paper ref.[16] and is due in the forthcoming paper [17]. The sections 3 and 4 are then combined. |
| id | cern-690675 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1993 |
| record_format | invenio |
| spelling | cern-6906752023-03-14T17:11:17Zdoi:10.1007/BF01574165http://cds.cern.ch/record/690675engBigi, Ikaros I.Y.Uraltsev, N.G.D$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |V$_{cb}$| in the heavy quark expansionParticle Physics - PhenomenologySummary of changes: The discussion of uncertainties in the 1/m.sub(Q) expansion was shortend as the more detailed one was presented in our recent paper ref.[16] and is due in the forthcoming paper [17]. The sections 3 and 4 are then combined.We present some straightforward applications of the QCD heavy quark expansion, stated in our previous papers, to the inclusive widths of heavy flavour hadrons. We address the question of the $D_s$ lifetime and argue that -- barring Weak Annihilation (WA) -- $\tau (D_s)$ is expected to exceed $\tau (D~0)$ by several per cent; on the other hand WA could provide a difference of up to $10\div20\%$ of {\it any} sign. We extract $m_c$, $m_b$ and $|V_{cb}|$ from $\Gamma\ind{SL}(D~+)$ and $\Gamma\ind{SL}(B)$; the values of the quark masses are somewhat higher, but still compatible with estimates from QCD sum rules, and $|V_{cb}|\simeq 0.043$ is somewhat smaller than typical estimates coming from exclusive semileptonic $B$ decays. We discuss the associated uncertainties in the $1/m_Q$ expansion as well as some consequences for other electroweak decays.hep-ph/9311243CERN-TH-7063-93UND-HEP-93-BIG-05CERN-TH-7063-93UND-HEP-93-BIG-05oai:cds.cern.ch:6906751993-12-21 |
| spellingShingle | Particle Physics - Phenomenology Bigi, Ikaros I.Y. Uraltsev, N.G. D$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |V$_{cb}$| in the heavy quark expansion |
| title | D$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |V$_{cb}$| in the heavy quark expansion |
| title_full | D$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |V$_{cb}$| in the heavy quark expansion |
| title_fullStr | D$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |V$_{cb}$| in the heavy quark expansion |
| title_full_unstemmed | D$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |V$_{cb}$| in the heavy quark expansion |
| title_short | D$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |V$_{cb}$| in the heavy quark expansion |
| title_sort | d$_{s}$ lifetime, m$_{b}$, m$_{c}$ and |v$_{cb}$| in the heavy quark expansion |
| topic | Particle Physics - Phenomenology |
| url | https://dx.doi.org/10.1007/BF01574165 http://cds.cern.ch/record/690675 |
| work_keys_str_mv | AT bigiikarosiy dslifetimembmcandvcbintheheavyquarkexpansion AT uraltsevng dslifetimembmcandvcbintheheavyquarkexpansion |