Excitation Function of Initial Temperature of Heavy Flavor Quarkonium Emission Source in High Energy Collisions

Figure 5

Transverse momentum spectra, (a, c–f) and (b) , of (a–c) , (d) , (e) , and (f) in (a) + and (b–f) + collisions at (a) 1.8, (b) 2.76, (c) 5.02, and (d–f) 7 TeV. The symbols shown in (a–c) represent the experimental data measured by the (a) CDF [17], (b) LHCb [24], and (c) CMS Collaborations [34] in (a) and (b, c) collisions in (a) , (b) , and (c) , respectively. The symbols shown in panels (d–f) represent the experimental data measured by the LHCb Collaboration [25] in collisions in , , , , and and scaled by different amounts shown in the panels. The data points are fitted by the Erlang distribution (Eq. (3)), the Hagedorn function (Eq. (4)), and the Tsallis-Levy function (Eq. (6)) by the solid, dashed, and dotted curves, respectively.

(a)

(b)

(c)

(d)

(e)

(f)