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CERN Document Server 4 записей найдено  Поиск длился 0.59 секунд. 
1.
Full O($\alpha_S$) Evaluation for $b \to s\gamma$ Transverse Momentum Distribution / Aglietti, Ugo (INFN, Rome) ; Sghedoni, Roberto (INFN, Parma) ; Trentadue, Luca (INFN, Parma)
The full O(alpha_S) transverse momentum distribution for the b -> s+gamma decay is computed. Results are presented in analytic form. [...]
hep-ph/0310360; DFUP-2003-25; CERN-TH-2003-255; ROME1-1361-03; CERN-TH-2003-255; DFUP-2003-25; ROMA-1-1361.- Geneva : CERN, 2004 - 13 p. - Published in : Phys. Lett. B 585 (2004) 131-143 Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint - Please contact the library if you need to access this document.
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2.
A new model-independent way of extracting |$V_{ub}/V_{cb}$| / Aglietti, Ugo (CERN) ; Ciuchini, Marco (Rome III U. ; INFN, Rome3) ; Gambino, Paolo (CERN)
The ratio between the photon spectrum in B -> X_s gamma and the differential semileptonic rate wrt the hadronic variable M_X/E_X is a short-distance quantity calculable in perturbation theory and independent of the Fermi motion of the b quark in the B meson. We present a NLO analysis of this ratio and show how it can be used to determine |V_ub/V_cb| independently of any model for the shape function. [...]
hep-ph/0204140; CERN-TH-2002-069; RM3-TH-02-4; CERN-TH-2002-069; RM-3-TH-2002-04.- Geneva : CERN, 2002 - 20 p. - Published in : Nucl. Phys. B 637 (2002) 427-44 Access to fulltext document: PDF; Fulltext: PDF; External link: Preprint
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3.
A sum rule from the shape function / Aglietti, Ugo (CERN ; INFN, Rome)
We present a sum rule relating the electron energy spectrum and the hadron mass distribution in semileptonic b -> u decays close to threshold. [...]
hep-ph/0010251 ; CERN-TH-2000-309 ; CERN-TH-2000-309. - 2000. - 7 p.
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4.
The structure function of semi-inclusive heavy flavour decays in field theory / Aglietti, Ugo (CERN ; INFN, Rome) ; Ricciardi, Giulia (Naples U. ; INFN, Naples)
We consider the decay of a heavy flavour into an inclusive hadronic state X of invariant mass m_X small with respect to its energy E_X, m_X << E_X. The electron spectrum and the hadronic mass distribution in semileptonic b -> u decays, or the photon spectrum in b -> s gamma decays, all require, close to their endpoints, a control over this region. [...]
hep-ph/0003146; CERN-TH-2000-071; DSF-T-7-00; CERN-TH-2000-071; DSF-T-2000-007.- Geneva : CERN, 2000 - 50 p. - Published in : Nucl. Phys. B 587 (2000) 363-99 Access to fulltext document: PDF; External link: Preprint - Please contact the library if you need to access this document.
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