MESON2021

Session

Parallel Session A1

17 May 2021, 17:45

online via ZOOM

Conveners

Parallel Session A1: Heavy quarks and symmetries

• Frank Nerling (GSI Darmstadt)

13. Implications of the D+s→π+π0η decay in the nature of a0(980) and molecular interpretation of the new X0(2900)

Raquel Molina Peralta (Institute for Corpuscular Physics)

17/05/2021, 17:45

Parallel

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...

40. Charmonium production in hadron-nucleus reactions

György Wolf (Wigner Research Centre for Physics)

17/05/2021, 18:05

Parallel

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)...

20. Rare b→d decays in covariant confined quark model

Aidos Issadykov (JINR Dubna)

17/05/2021, 18:25

Parallel

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...