Description
Quarkonium pair, quarkonium + vector boson, quarkonium + heavy quarks, Higgs to J/psi+gamma, ...
Two or more heavy quark-antiquark pairs can be produced in high energy collisions, not only because of increase of centre-of-mass energy, but also due to multiple parton scattering in case of hadron collisions. This will be a brief experimental overview on the double heavy production involving at least one quarkonium in the final state in $pp$ collisions at LHC, as well as in $e^{+} e^-$...
We present the first complete study of $\Upsilon$ and prompt $J/\psi$ production from single-parton scattering to the complete O($\alpha_s^6$) for color singlet contribution and including all leading SPS contributions. We find that the effective cross section characterizing the importance of double-parton scatterings is $\sigma_{eff}$≤8.2 mb at 68% confidence level from the D0 measurement. At...
We discuss the stability of tetraquarks systems made of two heavy quarks and two heavy antiquarks, with a potential model whose linear part is inspired by string dynamics.
At variance with some recent or less recent claims, we do not find binding for the double-charmonium or double-bottomonium cases. The string dynamics is, however, more favorable for (bcb̄c̄), i.e., a...
Here is a brief overview on the quarkonium production associated with a vector boson, such as photon, W or Z.