Heavy Flavor

Depending on the energy scale, there are two mechanisms that generate quark masses with different degrees of importance: current quark masses are generated by the electroweak symmetry breaking mechanism (Higgs mass) and spontaneous chiral symmetry breaking leads to the constituent quark masses in QCD (QCD mass). The QCD interaction strongly affects the light quarks (u, d, s) while the heavy quark masses (c, b, t) are mainly determined by the Higgs mechanism. In high-energy nuclear collisions at RHIC, heavy quarks are produced through gluon fusion and qq¯ annihilation. Heavy quark production is also sensitive to the parton distribution function. Unlike the light quarks, heavy quark masses are not modified by the surrounding QCD medium (or the excitations of the QCD medium) and the value of their masses is much higher than the initial excitation of the system. It is these differences between light and heavy quarks in a medium that make heavy quarks an ideal probe to study the properties of the hot and dense medium created in high-energy nuclear collisions.


Heavy flavor analyses at STAR can be separated into quarkonia, open heavy flavor and heavy flavor leptons.


QA of full embedding production - no weight





Non-photoninc electrons in central U+U collisions - abstract for EPS-HEP

HF PWG Weekly meeting - J/psi in central UU


QA of embeddig test samples - with weight

QA of embeddig test samples - without weight

Proceedings - Measurements of electrons from heavy flavor decays at the STAR experiment

NPE in central UU collisions - update



Talk at ICPAQGP2015 conference, Kolkata, India

ICPAQGP2015  takes place on February 2-6
expected length of the talk: 20 min
any comments and suggestions are very welcome

Update January 21, 2015:

Non-photonic electrons at the STAR experiment - poster

SSD Common mode noise correction

1>SSD meetings talks

Relative errors of NPE yield in central 5% UU collisions

Update on NPE spectra in central UU collisions

KCSF Proceedings - Upsilon production at the STAR experiment

HF PWG Meeting Minutes by Zhenyu - 2014/10/23

1) MTD data production strategy for Run 14 - Group discussion

Partially corrected NPE spectra in central UU collisions

Non-Photonic Electrons in STAR Experiment

Non-photonic electrons in UU