Abstract (data abstract)

We report on measurements of sequential $\Upsilon$ suppression in Au+Au collisions at $\sqrt{s_{_\mathrm{NN}}}$ = 200 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC) through both the dielectron and dimuon decay channels. In the 0-60\% centrality class, the nuclear modification factors ($R_{\mathrm{AA}}$), which quantify the level of yield suppression in heavy-ion collisions compared to p+p collisions, for $\Upsilon$(1S) and $\Upsilon$(2S) are $0.40 \pm 0.03~\textrm{(stat.)} \pm 0.03~\textrm{(sys.)} \pm 0.09~\textrm{(norm.)}$ and $0.26 \pm 0.08~\textrm{(stat.)} \pm 0.02~\textrm{(sys.)} \pm 0.06~\textrm{(norm.)}$, respectively, while the upper limit of the $\Upsilon$(3S) $R_{\mathrm{AA}}$ is 0.17 at a 95\% confidence level. This provides experimental evidence that the $\Upsilon$(3S) is significantly more suppressed than the $\Upsilon$(1S) at RHIC. The level of suppression for $\Upsilon$(1S) is comparable to that observed at the much higher collision energy at the Large Hadron Collider. These results point to the creation of a medium at RHIC whose temperature is sufficiently high to strongly suppress excited $\Upsilon$ states.

Figure 2.1

Data from Figure 2

10.17182/hepdata.133217.v2/t1

Inclusive Y(1S) $R_{AA}$ as a function of centrality in Au+Au collisions at 200 GeV. The bin corresponding to $N_{part}$ =...
Figure 2.2

Data from Figure 2

10.17182/hepdata.133217.v2/t2

Inclusive Y(2S) $R_{AA}$ as a function of centrality in Au+Au collisions at 200 GeV. The bin corresponding to $N_{part}$ =...
Figure 2.3

Data from Figure 2

10.17182/hepdata.133217.v2/t3

Upper limit of inclusive Y(3S) $R_{AA}$ with 95% confidence level in 0-60% Au+Au collisions at 200 GeV
Figure 4.1

Data from Figure 4

10.17182/hepdata.133217.v2/t4

Inclusive Y(1S) $R_{AA}$ as a function of $p_{T}$ in 0-60% Au+Au collisions at 200 GeV. Global uncertainty of 6.8% not...
Figure 4.2

Data from Figure 4

10.17182/hepdata.133217.v2/t5

Inclusive Y(2S) $R_{AA}$ as a function of $p_{T}$ in 0-60% Au+Au collisions at 200 GeV. Global uncertainty of 6.8% not...
Table 1.1

Data from Figure 2

10.17182/hepdata.133217.v2/t6

Inclusive Y(1S) yield as a function of centrality in Au+Au collisions at 200 GeV. The bin corresponding to $N_{part}$ =...
Table 1.2

Data from Figure 2

10.17182/hepdata.133217.v2/t7

Inclusive Y(2S) yield as a function of centrality in Au+Au collisions at 200 GeV. The bin corresponding to $N_{part}$ =...
Table 1.3

Data from Figure 2

10.17182/hepdata.133217.v2/t8

Upper limit of inclusive Y(3S) yield with 95% confidence level in 0-60% Au+Au collisions at 200 GeV
Table 2.1

Data from Figure 4

10.17182/hepdata.133217.v2/t9

Inclusive Y(1S) yield as a function of $p_{T}$ in 0-60% Au+Au collisions at 200 GeV.
Table 2.2

Data from Figure 4

10.17182/hepdata.133217.v2/t10

Inclusive Y(2S) yield as a function of p_{T} in 0-60% Au+Au collisions at 200 GeV.
Table 3.1

Data from Figure 2

10.17182/hepdata.133217.v2/t11

Y(2S)/Y(1S) ratio as a function of centrality in Au+Au collisions at 200 GeV. The bin corresponding to $N_{part}$ = 162...
Table 3.2

Data from Figure 2

10.17182/hepdata.133217.v2/t12

Upper limit of Y(3S)/Y(1S) ratio with 95% confidence level in 0-60% Au+Au collisions at 200 GeV
Table 4.1

Data from Figure 4

10.17182/hepdata.133217.v2/t13

Y(2S)/Y(1S) ratio as a function of $p_{T}$ in 0-60% Au+Au collisions at 200 GeV.

Figure 2.1

Figure 2.2

Figure 2.3

Figure 4.1

Figure 4.2

Table 1.1

Table 1.2

Table 1.3

Table 2.1

Table 2.2

Table 3.1

Table 3.2

Table 4.1

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