منابع مشابه
Spectator Interactions in Soft-Collinear Effective Theory
Soft-collinear effective theory is generalized to include soft massless quarks in addition to collinear fields. This extension is necessary for the treatment of interactions with the soft spectator quark in a heavy meson. The power counting of the relevant fields and the construction of the effective Lagrangian are discussed at leading order in Λ/mb. Several novel effects occur in the matching ...
متن کاملRadiative corrections to hard spectator scattering in B → ππ decays
We present the calculation of the next-to-leading corrections to the tree amplitudes which appear in the description of non-leptonic B-decays in the factorization approach. These corrections, together with radiative corrections to the jet functions, represent the full next-to-leading contributions to the dominant hard spectator scattering term generated by operators O1,2 in the decay amplitudes...
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At HERA, the large flux of almost real photons accompanying the electron beam leads to the copious photoproduction of jets. Regions of small momentum fractions x of the incoming particles are explored, where the density of partons is high. As a result, the probability for more than one hard partonic scattering occurring in a single γp collision could become significant. It is well known that th...
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At HERA, the large ux of almost real photons accompanying the electron beam leads to the copious photoproduction of jets. Regions of small momentum fractions x of the incoming particles are explored, where the density of partons is high. As a result, the probability for more than one hard partonic scattering occurring in a single p collision could become signiicant. It is well known that this e...
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The phenomenon of isoscaling is receiving considerable interest because of its relation with the symmetry term in statistical [1] and dynamical [2] descriptions of fragmentation reactions. As reported recently, the symmetry term coefficient γ in the liquid-drop description of the nascent fragments appears to be decreasing from the standard value γ = 25 MeV for isolated nuclei to about 15 MeV or...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 2008
ISSN: 0550-3213
DOI: 10.1016/j.nuclphysb.2007.10.028