Experimental femtoscopic correlation function of K0s-p pairs measured in minimum bias pp collisions at $\sqrt{s}=13$ TeV. The statistical uncertainties are represented by the error bars, while the boxes represent the systematic uncertainties obtained with the variation of the K0s and p selection criteria. The red line represents the fit performed with the Lednick\’y-Lyuboshitz model with a fixed source radius of 1.18 fm.
The red line represents the fit performed with the Lednick\’y-Lyuboshitz model with a fixed source radius of 1.18 fm (ALICE Collaboration Phys.Rev.Lett. 124 (2020) no.9, 092301) and in the zero effective range approximation. From this fit the real and imaginary part of the scattering length are estimated. The systematic uncertainty on the femtoscopic fit is represented by the red band that is obtained by varying the fixed parameters in the fit function.
K0s candidates selections:
-Track selections: minimum #clusters >70, #crossed rows over findable >0.8
-Topological and kinematic selections: 3sigma TPC $\pi$, DCA V0 daughters <0.8 cm, Pseudorapidity V0 daughters <0.8, K0s rapidity <0.5, K0s $c\tau$< 7*$c\tau^{nom}_{K0s}$, DCA1 >0.1 cm, DCA2 > 0.1 cm, V0 cosine of pointing angle >0.98, $|M_{\Lambda} - M^{nom}_{\Lambda}|>0.005 ~\mathrm{GeV/c^2}$, $|M_{\overline{\Lambda}} - M^{nom}_{\overline{\Lambda}}|>0.005 ~ \mathrm{GeV/c^2}$, $|M_{K0s} - M^{nom}_{K0s}| <0.016 ~ \mathrm{GeV/c^2}$.
Proton and antiproton selections:
-Track selections: aodtrack with filterbit 4, minimum #clusters >70, #crossed rows over findable >0.8
Kinematic and geometric selections: pseudorapidity < 0.8, DCAz <0.5 cm, DCAxy <0.1 cm, $ |M^{tof}_{p}-M^{nom}_p| < 0.08 ~ \mathrm{GeV/c^2} $.
Analysed datasets:
-Experimental data (AOD234): LHC16d, LHC16p, LHC16e, LHC16g, LHC16h, LHC16i, LHC16j, LHC16k, LHC16l, LHC16o, LHC17c,LHC17e, LHC17f, LHC17i, LHC17j, LHC17k, LHC17l, LHC17m, LHC17o, LHC17r, LHC17h, LHC18b, LHC18m, LHC18n, LHC18k, LHC18o, LHC18p, LHC18d, LHC18e, LHC18f, LHC18g, LHC18h, LHC18i, LHC18j, LHC18l
-Monte Carlo simulations: LHC18a1 (anchored to LHC17r), LHC18a8 (anchored to LHC17l), LHC18a9 (anchored to LHC17o), LHC18c12 (anchored to LHC17h), LHC18c13 (anchored to LHC17k), LHC18g4 (anchored to LHC18b), LHC18f1 (anchored to LHC16k), LHC18j4 (anchored to LHC18m), LHC18h4 (anchored to LHC18g), LHC17f5extra (anchored to LHC16h), LHC17l5 (anchored to LHC17m), LHC17k4 (anchored to LHC17i), LHC17h11 (anchored to LHC17j), LHC18c12bextra (anchored to LHC17h), LHC20f2 (anchored to LHC16d)