منابع مشابه
B-hadron production in top quark decay
We present the energy distribution of b-flavoured hadrons in top quark decay using the PYTHIA and HERWIG event generators, which we tune to LEP and SLD data. We find that fitting the string and cluster models is essential to reproduce the ee data and to reliably predict B-hadron production in top decay. We also compare the PYTHIA and HERWIG results with the ones yielded by resummed calculations...
متن کاملHadron spectra for semileptonic heavy quark decay.
We calculate the leading perturbative and power corrections to the hadronic invariant mass and energy spectra in semileptonic heavy hadron decays. We apply our results to the B system. Moments of the invariant mass spectrum, which vanish in the parton model, probe gluon bremsstrahlung and nonperturbative effects. Combining our results with recent data on B meson branching ratios, we obtain a lo...
متن کاملQuark-model hadron structure
We review some selected recent results on hadron spectroscopy and related theoretical studies based on constituent quark models.
متن کاملTop quark pair production and decay at hadron colliders
In ongoing and upcoming hadron collider experiments, top quark physics will play an important rôle in testing the Standard Model and its possible extensions. In this work we present analytic results for the differential cross sections of top quark pair production in hadronic collisions at next-to-leading order in the QCD coupling, keeping the full dependence on the spins of the top quarks. Thes...
متن کاملQuark-Hadron Duality, Factorization and Strong Phases in B0_d+- Decay
We consider the hadronic description of the B0 d → π+π− decay, with the aim to investigate the strong phases generated by the final state interactions. The derivation of the dispersion relations using the Lehmann-Symanzik-Zimmermann formalism and the Goldberger-Treiman method to include inelastic effects in the spectral function are presented. We discuss the problem of quark-hadron duality and ...
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ژورنال
عنوان ژورنال: Il Nuovo Cimento A
سال: 1967
ISSN: 0369-3546,1826-9869
DOI: 10.1007/bf02902203