Fully-heavy tetraquark states, i.e., $cc\overline{c}\overline{c}$, $bb\overline{b}\overline{b}$, $bb\overline{c}\overline{c}$ ($cc\overline{b}\overline{b}$), $cb\overline{c}\overline{c}$, $cb\overline{b}\overline{b}$, and $cb\overline{c}\overline{b}$, are systematically investigated by means of a nonrelativistic quark model based on lattice-QCD studies the two-body $Q\overline{Q}$ interaction, ...

We review the notation used in polarization measurements of B decays and discuss CP -violating observables in polarization measurements. We look at several examples of vector-vector B meson decays, while more details about the theory and experimental results in B decays can be found in a separate mini-review [1] in this Review. The angular distribution of the B meson decay to two vector mesons ...

The Belle experiment at the KEK B factory has collected 93 fb of electron positron collisions at √ s = 10.6 GeV. This has produced a sample of 85 million BB̄ meson pairs that can be used to study CP violation in rare (and not so rare) B decay modes. Here I report on a measurement of indirect CP violation in the decay B → J/ψK S, as well as time dependent CP asymmetries in rarer modes such as B →...

A bstract Production of the matter-antimatter asymmetry in B -Mesogenesis mechanism is directly related to branching fraction seemingly baryon number violating decays mesons into a light Standard Model and missing energy. Achieving observed requires that for such be greater than about 10 − 7 –10 5 . Experimental searches at Factories Hadron Colliders target specific decay modes. Therefore, comp...

In this research we described the effective Hamiltonian theory and applied this theory to the calculation of current-current (Q1,2) and QCD penguin (Q3,…,6) c quark decay rates. We calculated the decay rates of semileptonic and hadronic of charm quark in the effective Hamiltonian theory. We investigated the decay rates of D meson decays according to Spectator Quark Model (SQM) for the calculati...

The ACCMM model predicts the lepton spectrum from B meson decay by assuming the meson disintegrates into a spectator quark of definite mass and momentum distribution and an off shell b quark whose decay leptons (boosted into the rest frame of the meson) determine the lepton spectrum. In this letter, we show that one can define a model dependent b quark mass so that the spectrum derived from the...

We consider two body decays of B meson into a light vector (V) and a pseudoscalar (P) meson. The constraint obtained from the B → P P modes on the parameter space of the input parameters is imposed also on B → V P modes. In particular we constrain ξ ≡ (1/N c) for those modes from recently measured B → ωK, φK and are able to get a satisfactory pictures for all modes where data exists. Modes that...