Speaker
Description
The hadronization process of heavy hadrons with botttom and charm quarks, especially for baryons $\Lambda_{c}$ and $\Lambda_{b}$, in a dense QGP medium is largely not understood.
We present within a coalescence plus fragmentation model the predictions for $D_{0}$, $D_{s}$, $\Lambda_{c}$, $B$ and $\Lambda_{b}$ and the related baryon to meson ratios at RHIC and LHC in a wide range of transverse momentum region up to 10 GeV [1].
We will discuss how our model can predict values for $\Lambda_{c}/D_{0}$ and $\Lambda_{b}/B$ of the order of $O(1)$, which is much larger than the expectations from fragmentation, and in agreement whit early data from STAR collaboration [2].
Furthermore the same approach can be employed to predict baryon to meson ratio $\Lambda/K$ [3], $\Lambda_{c}/D^{0}$ in $pp$ collisions assuming that at the LHC top energies there can be the formation of QGP matter.
We find considerable volume effects that significantly reduce the ratios but still predict quite larger values with respect to fragmentation, again in agreement with recent data from ALICE in $pp$ collisions [4]. A comparison to other coalescence models and thermal models is discussed.
[1] S. Plumari, V. Minissale, S.K. Das, and V. Greco, arXiv:1712.00730 [hep-ph]
[2] STAR Collaboration, Nucl.Phys. A967 (2017) 620-623
[3] V. Minissale, F. Scardina, and V. Greco, Phys. Rev. C 92, 054904 (2015)
[4] A. Grelli, ALICE Coll., plenary talk Strangeness in Quark Matter 2017, Utrecht
| Content type | Theory |
|---|---|
| Centralised submission by Collaboration | Presenter name already specified |
