Factorization of multiparticle contributions to amplitudes of B-meson weak decaysстатья
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Дата последнего поиска статьи во внешних источниках: 23 января 2026 г.
Аннотация:We show that multiparticle contributions to amplitudes of weak decays of the generic topology (heavy quark hits some intermediate point of the propagator line joining the end-points from which momenta q and q′ are emitted) is given in the heavy quark limit and at the leading order in αs by the convolution of (i) hard kernel composed of highly virtual propagators of light degrees of freedom and (ii) the B-meson multiparticle wave function, <0|φ(x)φ(x1)...φ(xn)φb(0)φ(x′n′ )...φ(x′1)φ(x′)|B(p)>, in a double-collinear light-cone configuration: the coordinates x, x1, ..., xn are ordered and aligned along the light-like 4-vector aμ, a2 = 0, qμ ∝ aμ, while the coordinates x′, x′1, ..., x′n′ are ordered and aligned along the light-like 4-vector a′μ, a′2 = 0, q′μ ∝ a′μ, a′a\ne 0. Corrections to this factorization formula are suppressed by powers of QCD/MB.