HEPData

Abstract (data abstract)

Measuring K$^0_{\rm S}$K$^{\rm \pm}$ interactions using pp collisions at $\mathbf {\sqrt{s}=7}$ TeV LHC ALICE collaboration K0sKch femtoscopy from 7 TeV pp collisions minimum bias trigger, -0.8 < eta < 0.8 We present the first measurements of femtoscopic correlations between the K$^0_{\rm S}$ and K$^{\rm \pm}$ particles in pp collisions at $\sqrt{s}=7$ TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding solely via the $a_0(980)$ resonance. The extracted kaon source radius and correlation strength parameters for K$^0_{\rm S}$K$^{\rm -}$ are found to be equal within the experimental uncertainties to those for K$^0_{\rm S}$K$^{\rm +}$. Results of the present study are compared with those from identical-kaon femtoscopic studies also performed with pp collisions at $\sqrt{s}=7$ TeV by ALICE and with a K$^0_{\rm S}$K$^{\rm \pm}$ measurement in Pb-Pb collisions at $\sqrt{s_{\rm NN}}=2.76$ TeV. Combined with the Pb-Pb results, our pp analysis is found to be compatible with the interpretation of the $a_0(980)$ having a tetraquark structure instead of that of a diquark.

Figure 1a

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10.17182/hepdata.88298.v1/t1

Raw K0s K+ correlation function for all kT
https://www.hepdata.net/record/data/374075yaml https://www.hepdata.net/record/data/374075/csvcsv
Figure 1b

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Raw K0s K+ correlation function for kT < 0.85 GeV/c
https://www.hepdata.net/record/data/374076yaml https://www.hepdata.net/record/data/374076/csvcsv
Figure 1c

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Raw K0s K+ correlation function for kT > 0.85 GeV/c
https://www.hepdata.net/record/data/374077yaml https://www.hepdata.net/record/data/374077/csvcsv
Figure 3a

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C(k*)/(quadratic baseline) for K0s K+ and all kT, systematic uncertainties negligible for k*>0.06 GeV/c
https://www.hepdata.net/record/data/374078yaml https://www.hepdata.net/record/data/374078/csvcsv
Figure 3b

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C(k*)/(quadratic baseline) for K0s K+ and kT < 0.85 GeV/c, systematic uncertainties negligible for k*>0.06 GeV/c
https://www.hepdata.net/record/data/374079yaml https://www.hepdata.net/record/data/374079/csvcsv
Figure 3c

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C(k*)/(quadratic baseline) for K0s K+ and kT > 0.85 GeV/c, systematic uncertainties negligible for k*>0.06 GeV/c
https://www.hepdata.net/record/data/374080yaml https://www.hepdata.net/record/data/374080/csvcsv
Figure 3d

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C(k*)/(quadratic baseline) for K0s K- and all kT, systematic uncertainties negligible for k*>0.06 GeV/c
https://www.hepdata.net/record/data/374081yaml https://www.hepdata.net/record/data/374081/csvcsv
Figure 3e

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C(k*)/(quadratic baseline) for K0s K- and kT < 0.85 GeV/c, systematic uncertainties negligible for k*>0.06 GeV/c
https://www.hepdata.net/record/data/374082yaml https://www.hepdata.net/record/data/374082/csvcsv
Figure 3f

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C(k*)/(quadratic baseline) for K0s K- and kT > 0.85 GeV/c, systematic uncertainties negligible for k*>0.06 GeV/c
https://www.hepdata.net/record/data/374083yaml https://www.hepdata.net/record/data/374083/csvcsv
Figure 5a_pp

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R vs. kT for 7 TeV pp averaged over K0s K+ and K0s K- with Achasov2 parameters
https://www.hepdata.net/record/data/374084yaml https://www.hepdata.net/record/data/374084/csvcsv
Figure 5a_PbPb

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R vs. kT for 2.76 TeV/nucleon Pb Pb averaged over K0s K+ and K0s K- with Achasov2 parameters
https://www.hepdata.net/record/data/374085yaml https://www.hepdata.net/record/data/374085/csvcsv
Figure 5b_pp

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10.17182/hepdata.88298.v1/t12

lambda/purity vs. kT for 7 TeV pp averaged over K0s K+ and K0s K- with Achasov2 parameters
https://www.hepdata.net/record/data/374086yaml https://www.hepdata.net/record/data/374086/csvcsv
Figure 5b_PbPb

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lambda/purity vs. kT for 2.76 TeV/nucleon Pb Pb averaged over K0s K+ and K0s K- with Achasov2 parameters
https://www.hepdata.net/record/data/374087yaml https://www.hepdata.net/record/data/374087/csvcsv
Figure 6a_K0Kch

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R vs. kT for 7 TeV pp averaged over K0s K+ and K0s K- and with Achasov2 parameters
https://www.hepdata.net/record/data/374088yaml https://www.hepdata.net/record/data/374088/csvcsv
Figure 6a_K0K0

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R vs. kT for 7 TeV pp --> K0s K0s averaged over event multiplicity
https://www.hepdata.net/record/data/374089yaml https://www.hepdata.net/record/data/374089/csvcsv
Figure 6a_KchKch

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R vs. kT for 7 TeV pp --> K+- K+- averaged over event multiplicity and averaged between K+ and K-
https://www.hepdata.net/record/data/374090yaml https://www.hepdata.net/record/data/374090/csvcsv
Figure 6b_K0Kch

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lambda/purity vs. kT for 7 TeV pp averaged over K0s K+ and K0s K- and with Achasov2 parameters
https://www.hepdata.net/record/data/374091yaml https://www.hepdata.net/record/data/374091/csvcsv
Figure 6b_K0K0

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lambda/purity vs. kT for 7 TeV pp --> K0s K0s averaged over event multiplicity
https://www.hepdata.net/record/data/374092yaml https://www.hepdata.net/record/data/374092/csvcsv
Figure 6b_KchKch

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lambda/purity vs. kT for 7 TeV pp --> K+- K+- averaged over event multiplicity and averaged between K+ and K-
https://www.hepdata.net/record/data/374093yaml https://www.hepdata.net/record/data/374093/csvcsv

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Figure 3a

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Figure 5a_pp

Figure 5a_PbPb

Figure 5b_pp

Figure 5b_PbPb

Figure 6a_K0Kch

Figure 6a_K0K0

Figure 6a_KchKch

Figure 6b_K0Kch

Figure 6b_K0K0

Figure 6b_KchKch

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