Abstract (data abstract)

The production of

Υ (2 S)

and

Υ (3 S)

mesons in lead-lead (

PbPb

) and proton-proton (

pp

) collisions is studied in their dimuon decay channel using the CMS detector at the LHC. The

Υ (3 S)

meson is observed for the first time in \PbPb collisions, with a significance above five standard deviations. The nuclear modification factors, derived from the ratio of yields measured in

PbPb

pp

collisions, are reported for both

Υ (2 S)

and

Υ (3 S)

mesons as functions of

Υ

meson transverse momentum and

PbPb

collision centrality. The suppression is found to be stronger for

Υ (3 S)

mesons compared to

Υ (2 S)

mesons, extending the pattern of sequential suppression of quarkonium states in nuclear collisions previously seen for the

J / ψ

ψ (2 S)

Υ (1 S)

and

Υ (2 S)

mesons. The results provide new constraints on theoretical descriptions of the dynamics of quarkonium states in heavy ion collisions.

Figure 2, left UPSILON(2S)

10.17182/hepdata.130959.v2/t1

Measured $R_{AA}$ for the $Υ (2 S)$ state as functions of PbPb collision centrality, integrated over the full kinematic range $p_{T}$ <...
Figure 2, left UPSILON(3S)

10.17182/hepdata.130959.v2/t2

Measured $R_{AA}$ for the $Υ (3 S)$ state as functions of PbPb collision centrality, integrated over the full kinematic range $p_{T}$ <...
Figure 2, center UPSILON(2S)

10.17182/hepdata.130959.v2/t3

Measured $R_{AA}$ for the $Υ (2 S)$ state in the 0–90% centrality interval, integrated over the full kinematic range $p_{T}$ < 30 GeV/c...
Figure 2, center UPSILON(3S)

10.17182/hepdata.130959.v2/t4

Measured $R_{AA}$ for the $Υ (3 S)$ state in the 0–90% centrality interval, integrated over the full kinematic range $p_{T}$ < 30...
Figure 2, right UPSILON(2S)

10.17182/hepdata.130959.v2/t5

Measured $R_{AA}$ for the $Υ (2 S)$ state as functions of transverse momentum $p_{T}$ , integrated over the rapidity range of |y| <...
Figure 2, right UPSILON(3S)

10.17182/hepdata.130959.v2/t6

Measured $R_{AA}$ for the $Υ (3 S)$ state as functions of transverse momentum $p_{T}$ , integrated over the rapidity range of |y| <...
Figure 3, left

10.17182/hepdata.130959.v2/t7

The double ratios of $Υ (3 S)$ / $Υ (2 S)$ as functions of PbPb collision centrality, integrated over the full kinematic range $p_{T}$ <...
Figure 3, center

10.17182/hepdata.130959.v2/t8

The double ratios of $Υ (3 S)$ / $Υ (2 S)$ in the 0–90% centrality interval, integrated over the full kinematic range $p_{T}$ < 30...
Figure 3, right

10.17182/hepdata.130959.v2/t9

The double ratios of $Υ (3 S)$ / $Υ (2 S)$ as functions of transverse momentum $p_{T}$ , integrated over the rapidity range of |y| <...
Table 1

10.17182/hepdata.130959.v2/t10

Yields for $Υ (2 S)$ mesons in PbPb collisions in centrality $0 - - 90 %$ and $| y | < 2.4$ , corrected for acceptance and efficiency, and...
Table 2

10.17182/hepdata.130959.v2/t11

Yields for $Υ (2 S)$ mesons in PbPb collisions in $p_{T} < 30 G e V / c$ and $| y | < 2.4$ , corrected for acceptance and efficiency,...
Table 3

10.17182/hepdata.130959.v2/t12

Yields for $Υ (3 S)$ mesons in PbPb collisions in centrality $0 - - 90 %$ and $| y | < 2.4$ , corrected for acceptance and efficiency, and...
Table 4

10.17182/hepdata.130959.v2/t13

Yields for $Υ (3 S)$ mesons in PbPb collisions in $p_{T} < 30 G e V / c$ and $| y | < 2.4$ , corrected for acceptance and efficiency,...
Table 5

10.17182/hepdata.130959.v2/t14

Yields for $Υ (1 S)$ mesons in PbPb collisions in $p_{T} < 30 G e V / c$ and $| y | < 2.4$ , corrected for acceptance and efficiency,...

Figure 2, left UPSILON(2S)

Figure 2, left UPSILON(3S)

Figure 2, center UPSILON(2S)

Figure 2, center UPSILON(3S)

Figure 2, right UPSILON(2S)

Figure 2, right UPSILON(3S)

Figure 3, left

Figure 3, center

Figure 3, right

Table 1

Table 2

Table 3

Table 4

Table 5

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