Effects of shower patrons on soft and semihard hadrons produced in Pb-Pb collisions at LHC

20 May 2014, 16:30
2h
spectrum (darmstadtium)

spectrum

darmstadtium

Board: E-43
Poster Jets Poster session

Speaker

Lilin Zhu (Sichuan University)

Description

The transverse momentum distributions of identified hadrons produced in Pb-Pb collisions at the Large Hadron Collider (LHC) are studied for $p_T$ up to 20 GeV/c. We use quark recombination to treat hadronization, applied uniformly at all $p_T$ based on a common thermal parton distribution of light and strange quarks and on shower patrons emitted in hard and semihard jets. Furthermore, we improve the treatment of momentum degradation. Since we aim to confront the $p_T$ spectra at mid-rapidity of all observed hadrons, $\pi$, K, p, $\Lambda$, $\Xi$, $\phi$ and $\Omega$, the system is highly contained. There are thousands of soft hadrons and hard jets produced in Pb-Pb collisions at 2.76 TeV. Minijets can fragment into soft patrons with multiplicities so high that their effects on the patrons created in the soft interaction of the bulk can't be ignored. So the primary feature of our work is to quantify the effect of hard and semihard jets on the soft sector. What we find is that the soft patrons generated by the hard patrons are so overwhelming at LHC, compared to the situation at RHIC. It becomes clear that the hadronization problem at LHC is drastically different from that at RHIC.

Primary author

Lilin Zhu (Sichuan University)

Co-author

Rudolph Hwa

Presentation materials