Conveners
Parallel Session A1: Heavy quarks and symmetries
- Frank Nerling (GSI Darmstadt)
In a recent paper \cite{Ablikim:2019pit}, the BESIII collaboration reported the so-called first observation of pure W-annihilation decays D+s→a+0(980)π0 and D+s→a00(980)π+. The measured absolute branching fractions are, however, puzzlingly larger than those of other measured pure W-annihilation decays by at least one order of magnitude. In addition, the relative phase between the two decay...
We calculate the dilepton spectrum at the mass range of the low-lying charmonium states in $\bar p$, p and $\pi$ Au collisions taking into account their in-medium propagation. The time evolution of the spectral functions of the charmonium state is studied with a BUU type transport model. We calculated the charmonium contribution to the dilepton spectrum and show that for $\Psi$(3686)...
We study the rare decays corresponding to b → d transition in the framework of covariant confined quark model. The transition form factors for the channels B→ (π,ρ,ω) and Bs → K(∗) are computed in the entire dynamical range of momentum transfer squared. Using
the form factors, we compute the branching fractions of the rare decays and our results are found to be matching well with the...
