منابع مشابه
Precision determination of Vub
We review how to determine |Vub| from inclusive semileptonic B decay using combined cuts on the leptonic and hadronic invariant masses to eliminate the b → c background. This leads to a determination of |Vub| with theoretical uncertainty at the 5–10% level. LBNL-49079, UCSD/PTH 01-22, UTPT-01-13 The magnitude of Vub determines the length of one of the side of the unitarity triangle and is there...
متن کاملPrecision Determination of |v Ub |
The last two years saw an impressive improvement in the determination of |Vub|, especially from inclusive decays. The error on inclusive |Vub| was reduced from 18% (PDG 2004) to 8% (PDG 2006). This progress is a result of a combined experimental and theoretical efforts. In this talk, the theoretical framework (BLNP) that enabled such progress is reviewed, as well as other approaches to inclusiv...
متن کاملTowards precision determination of uPDFs
Figure 1: The unintegrated gluon distribution at a scale q̄ = 4 GeV for different values of μ and σ of the intrinsic k⊥ distribution as a function of x for fixed k⊥(top) and as a function of k⊥ (bottom) for fixed x Unintegrated parton density functions (uPDFs) are best suited to study details of the hadronic final state in high energy ep and also in pp collisions (for a review see [2–8]). In gen...
متن کاملPrecision determination of the D0 mass.
A precision measurement of the D0 meson mass has been made using approximately 281 pb(-1) of e+e- annihilation data taken with the CLEO-c detector at the psi(3770) resonance. The exclusive decay D0-->K_{S}phi has been used to obtain M(D0)=1864.847+/-0.150(stat)+/-0.095(syst) MeV. This corresponds to M(D0D*0)=3871.81+/-0.36 MeV, and leads to a well-constrained determination of the binding energy...
متن کاملPrecision Scale Determination from the Upsilon Spectrum
We determine the radial excitation energy (2S-1S splitting)in the Upsilon spectrum using NRQCD b quarks on MILC configurations. We have statistical fitting errors of around 1% across a range of lattice spacing values using random wall sources, and this allows us to give improved determinations of the physical value of the heavy quark potential parameter r1. We also show improved results for the...
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ژورنال
عنوان ژورنال: Nuclear Physics B - Proceedings Supplements
سال: 2007
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2007.05.005