Femtoscopic measurements in $p$+Pb collisions at $\sqrt{s_{{}_{\text{NN}}}}=5.02$~TeV with ATLAS at the LHC

Abstract

Recent measurements in two-particle correlations in $p$+Pb collisions suggest collective behavior reminiscent of that observed in Pb+Pb. Femtoscopic measurements may provide useful insight on this behavior because they image the spatio-temporal size of the particle emitting region. This proceeding presents identical-pion Hanbury Brown and Twiss (HBT) measurements from ATLAS using one- and three-dimensional correlation functions. Pions are identified using $\text{d}E/\text{d}x$ measured in the pixel detector. Correlation functions and the resulting HBT radii are shown as a function of pair momentum ($k_{\mathrm{T}}$) and collision centrality.

4 pages, 8 figures, to appear in the proceedings for the Quark Matter 2015 conference, Kobe, Japan

References in corpus (6)

• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Observation of long-range elliptic anisotropies in $\sqrt{s}=$13 and 2.76 TeV $pp$ collisions with the ATLAS detector
• Resolving the HBT Puzzle in Relativistic Heavy Ion Collision
• Two-pion femtoscopy in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
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• Two-particle Bose-Einstein correlations in $pp$ collisions at $\sqrt{\mathbf{s}}=$ 0.9 and 7 TeV measured with the ATLAS detector