منابع مشابه
Physics of Bc mesons
Gershtein S. In the framework of potential models for heavy quarkonium the mass spectrum for the system (¯ bc) is considered. Spin-dependent splittings, taking into account a change of a constant for effective coulomb interaction between the quarks, and widths of radiative transitions between the (¯ bc) levels are calculated. In the framework of QCD sum rules, masses of the lightest vector B * ...
متن کاملBc MESONS AS A SIGNAL OF DECONFINEMENT
We investigate the fate of bottom quarks produced in heavy-ion collisions at RHIC. Examining both the direct capture of a charmed quark, and multi-step processes, where the Bc meson is formed in a sequence of quark capture and exchange reactions, we find: a) that a sufficiently high number of Bc’s will be produced to generate a detectable tri-lepton signal, and b) that the production rate of Bc...
متن کاملBc mesons in a Bethe-Salpeter model
We apply our Bethe-Salpeter model for mesons to the Bc family with parameters fixed in our previous investigation. We evaluate the mass of the pseudo-scalar Bc meson as 6.356 GeV/c2 and 6.380 GeV/c2 and the lifetime as 0.47 ps and 0.46 ps respectively in two reductions of the Bethe-Salpeter Equation, in good agreement with the recently reported mass of 6.40 ± 0.39 (stat.) ± 0.13 (syst.) GeV/c2 ...
متن کاملComparative study of the hadronic production of Bc mesons.
A comparative study of the full α4s perturbative QCD calculation of the hadronic production of the Bc and B ∗ c mesons and the fragmentation approximation is presented. We examined the various subprocesses in detail and the distribution C(z), where z is twice the fraction of the Bc or B ∗ c meson energy in the center of mass of the subprocess, which proved insightful and revealed the importance...
متن کاملNon-leptonic decays of the Bc into tensor mesons
We have computed the branching ratios of the exclusive pseudoscalar (vector) + tensor modes that are allowed in the decays of the Bc meson. The dominant spectator and annihilation contributions in those decays are evaluated using the factorization hypothesis. We find that some of these decay channels, such as B c → (ρ,D s ,D s )χc2 and B c → πB s2 , have branching ratios of the order of 10, whi...
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ژورنال
عنوان ژورنال: Physics-Uspekhi
سال: 1995
ISSN: 1063-7869,1468-4780
DOI: 10.1070/pu1995v038n01abeh000063