p-p, p-$\Lambda$ and $\Lambda$-$\Lambda$ correlations studied via femtoscopy in pp reactions at $\sqrt{s}$ = 7 TeV

Abstract

We report on the first femtoscopic measurement of baryon pairs, such as p-p, p-$\Lambda$ and $\Lambda$-$\Lambda$, measured by ALICE at the Large Hadron Collider (LHC) in proton-proton collisions at $\sqrt{s}$ = 7 TeV. This study demonstrates the feasibility of such measurements in pp collisions at ultrarelativistic energies. The femtoscopy method is employed to constrain the hyperon-nucleon and hyperon-hyperon interactions, which are still rather poorly understood. A new method to evaluate the influence of residual correlations induced by the decays of resonances and experimental impurities is hereby presented. The p-p, p-$\Lambda$ and $\Lambda$-$\Lambda$ correlation functions were fitted simultaneously with the help of a new tool developed specifically for the femtoscopy analysis in small colliding systems 'Correlation Analysis Tool using the Schrödinger Equation' (CATS). Within the assumption that in pp collisions the three particle pairs originate from a common source, its radius is found to be equal to $r_0=1.125\pm 0.018$ (stat) ${}_{-0.035}^{+0.058}$ (syst) fm. The sensitivity of the measured p-$\Lambda$ correlation is tested against different scattering parameters which are defined by the interaction among the two particles, but the statistics is not sufficient yet to discriminate among different models. The measurement of the $\Lambda$-$\Lambda$ correlation function constrains the phase space spanned by the effective range and scattering length of the strong interaction. Discrepancies between the measured scattering parameters and the resulting correlation functions at LHC and RHIC energies are discussed in the context of various models.

32 pages, 5 captioned figures, 4 tables, authors from page 27, published, figures at http://aliceinfo.cern.ch/ArtSubmission/node/4445

References in corpus (16)

• PYTHIA 6.4 Physics and Manual
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Hyperon Puzzle: Hints from Quantum Monte Carlo Calculations
• Hyperon-nucleon interactions - a chiral effective field theory approach
• Baryon-baryon interactions in the SU6 quark model and their applications to light nuclear systems
• Hyperon mixing and universal many-body repulsion in neutron stars
• Lambda-Lambda interaction from relativistic heavy-ion collisions
• A femtoscopic Correlation Analysis Tool using the Schrödinger equation (CATS)
• Freeze-out radii extracted from three-pion cumulants in pp, p-Pb and Pb-Pb collisions at the LHC
• Extracting baryon-antibaryon strong interaction potentials from p$\bar{\Lambda }$ femtoscopic correlation function
• Baryon interactions from lattice QCD with physical masses --- strangeness $S=-1$ sector ---
• ${\Sigma }^0$ production in proton nucleus collisions near threshold
• Residual correlations between decay products of ${\pi }^0{\pi }^0$ and $p{\Sigma }^0$ systems
• Source radii at target rapidity from two-proton and two-deuteron correlations in central Pb+Pb collisions at 158 A GeV
• Low-energy QCD and hadronic structure

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