Two Pion Femtoscopy In Mathmip Mi Math Pb Collisions At Mathmrowmsqrtmsubmi Mimrowmin Mimin Mi Mrow Msub Msqrtmo
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Two-pion Femtoscopy in [math][mi]p[/mi][/math]-Pb Collisions at [math][mrow][msqrt][msub][mi][/mi][mrow][mi]N[/mi][mi]N[/mi][/mrow][/msub][/msqrt][mo]
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Here, we report the results of the femtoscopic analysis of pairs of identical pions measured in p-Pb collisions at √sNN = 5.02 TeV. Femtoscopic radii are determined as a function of event multiplicity and pair momentum in three spatial dimensions. As in the pp collision system, the analysis is complicated by the presence of sizable background correlation structures in addition to the femtoscopic signal. The radii increase with event multiplicity and decrease with pair transverse momentum. When taken at comparable multiplicity, the radii measured in p-Pb collisions, at high multiplicity and low pair transverse momentum, are 10%-20% higher than those observed in pp collisions but below those observed in A-A collisions. The results are compared to hydrodynamic predictions at large event multiplicity as well as discussed in the context of calculations based on gluon saturation.
Math Mrow Msup Mi K /mi Mo * /mo /msup Msup Mrow Mo ( /mo Mn 892 /mn Mo /mo /mrow Mn 0 /mn /msup /mrow /math and Math Mrow Mi Phi /mi Mo ( /mo Mn 1020 /mn Mo ) /mo /mrow /math Production in Pb-Pb Collisions at Math Mrow Msqrt Msub Mi /mi Mrow Mi N /mi Mi N /mi /mrow /msub /msqrt Mo
The yields of the K*(892)0 and [Phi](1020) resonances are measured in Pb-Pb collisions at √sNN=2.76 TeV through their hadronic decays using the ALICE detector. The measurements are performed in multiple centrality intervals at mid-rapidity (
Azimuthally-differential Pion Femtoscopy Relative to the Second and Third Harmonic in Pb-Pb Collisions
In particular, measurements of the HBT radii relative to the second harmonic event plane angle ( 2) provide information on the nal shape of the system, which is expected to become more spherical compared to the initial state due to stronger in-plane expansion [55]. In contrast, hydrodynamics model studies have shown that the azimuthal dependence of the HBT radii relative to the third harmonic event plane angle can originate from the anisotropies in collective velocity gradients or the initial spatial anisotropy (triangular) [33]. The signs of the HBT radii relative to the third harmonic event plane angle oscillations constrain the origin of these oscillation [33].