Abstract

The production of K$^*$(892)$^\pm$ meson resonance is measured at midrapidity ($|y|<0.5$) in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=5.02$ TeV using the ALICE detector at the LHC. The resonance is reconstructed via its hadronic decay channel K$^*$(892)$^\pm \rightarrow \rm{K^0_S \pi^\pm}$. The transverse momentum distributions are obtained for various centrality intervals in the $p_{\rm T}$ range of 0.4-16 GeV/$c$. The reported measurements of integrated yields, mean transverse momenta, and particle yield ratios are consistent with previous ALICE measurements for K$^*$(892)$^0$. The $p_{\rm T}$-integrated yield ratio 2K$^*$(892)$^\pm$/($\rm{K^+ + K^-}$) in central Pb-Pb collisions shows a significant suppression (9.3$\sigma$) relative to pp collisions. Thermal model calculations overpredict the particle yield ratio. Although both simulations consider the hadronic phase, only HRG-PCE accurately represents the measurements, whereas MUSIC+SMASH tends to overpredict them. These observations, along with the kinetic freeze-out temperatures extracted from the yields of light-flavored hadrons using the HRG-PCE model, indicate a finite hadronic phase lifetime, which increases towards central collisions. The $p_{\rm T}$-differential yield ratios 2K$^*$(892)$^\pm$/($\rm{K^+ + K^-}$) and 2K$^*$(892)$^\pm$/($\rm{\pi^+ + \pi^-}$) are suppressed by up to a factor of five at $p_{\rm T}<2$ GeV/$c$ in central Pb-Pb collisions compared to pp collisions at $\sqrt{s} =$ 5.02 TeV. Both particle ratios and are qualitatively consistent with expectations for rescattering effects in the hadronic phase. The nuclear modification factor shows a smooth evolution with centrality and is below unity at $p_{\rm T}>8$ GeV/$c$, consistent with measurements for other light-flavored hadrons. The smallest values are observed in most central collisions, indicating larger energy loss of partons traversing the dense medium.

Table 1a

Data from Figure 3.

10.17182/hepdata.150017.v1/t1

$p_{\rm T}$-distributions of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at \sqrt{s_{NN}}$ = 5.02 TeV for...
Table 1b

Data from Figure 3.

10.17182/hepdata.150017.v1/t2

$p_{\rm T}$-distributions of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at \sqrt{s_{NN}}$ = 5.02 TeV for...
Table 1c

Data from Figure 3.

10.17182/hepdata.150017.v1/t3

$p_{\rm T}$-distributions of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at \sqrt{s_{NN}}$ = 5.02 TeV for...
Table 1d

Data from Figure 3.

10.17182/hepdata.150017.v1/t4

$p_{\rm T}$-distributions of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at \sqrt{s_{NN}}$ = 5.02 TeV for...
Table 1e

Data from Figure 3.

10.17182/hepdata.150017.v1/t5

$p_{\rm T}$-distributions of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at \sqrt{s_{NN}}$ = 5.02 TeV for...
Table 2

Data from Figure 5 (left panel).

10.17182/hepdata.150017.v1/t6

$p_{\rm T}$-integrated yield d$N$/d$y$ of K$^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02...
Table 3

Data from Figure 5 (right panel).

10.17182/hepdata.150017.v1/t7

Mean $p_{\rm T}$ of K$^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV.
Table 4

Data from Figure 6.

10.17182/hepdata.150017.v1/t8

$p_{\rm T}$-integrated yield ratio of $\rm{K}^{*}$ (average of particleand anti-particle) to K (average of particle and anti-particle) measured in Pb-Pb...
Table 5

Data from Figure 7 (left panel).

10.17182/hepdata.150017.v1/t9

$p_{\rm T}$ differential ratio $(\rm{K}^{*\pm} + \rm{K}^{*\mp}) / (\rm{K}^{+}+\rm{K}^{-})$ measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV for 0-10\%...
Table 6

Data from Figure 7 (left panel).

10.17182/hepdata.150017.v1/t10

$p_{\rm T}$ differential ratio $(\rm{K}^{*\pm} + \rm{K}^{*\mp}) / (\rm{K}^{+}+\rm{K}^{-})$ measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV for 60-80\%...
Table 7

Data from Figure 7 (right panel).

10.17182/hepdata.150017.v1/t11

$p_{\rm T}$ differential ratio $(\rm{K}^{*\pm} + \rm{K}^{*\mp}) / (\rm{pi}^{+}+\rm{pi}^{-})$ measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV for 0-10\%...
Table 8

Data from Figure 7 (right panel).

10.17182/hepdata.150017.v1/t12

$p_{\rm T}$ differential ratio $(\rm{K}^{*\pm} + \rm{K}^{*\mp}) / (\rm{pi}^{+}+\rm{pi}^{-})$ measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02 TeV for 60-80\%...
Table 9

Data from Figure 8.

10.17182/hepdata.150017.v1/t13

$p_{T}$-dependent nuclear modification factor of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02...
Table 10

Data from Figure 8.

10.17182/hepdata.150017.v1/t14

$p_{T}$-dependent nuclear modification factor of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02...
Table 11

Data from Figure 8.

10.17182/hepdata.150017.v1/t15

$p_{T}$-dependent nuclear modification factor of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02...
Table 12

Data from Figure 8.

10.17182/hepdata.150017.v1/t16

$p_{T}$-dependent nuclear modification factor of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02...
Table 13

Data from Figure 8.

10.17182/hepdata.150017.v1/t17

$p_{T}$-dependent nuclear modification factor of $\rm{K}^{*}$ (average of particle and anti-particle) meson measured in Pb-Pb collisions at $\sqrt{s_{NN}}$ = 5.02...

Table 1a

Table 1b

Table 1c

Table 1d

Table 1e

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Table 11

Table 12

Table 13

JSON

YAML

YODA

YODA1

ROOT

CSV

Visualize

Ask a Question