The $\bf{\Lambda p}$ interaction studied via femtoscopy in p + Nb reactions at $\mathbf{\sqrt{s_{NN}}=3.18} ~\mathrm{\bf{GeV}}$ - INSPIRE

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The $\bf{\Lambda p}$ interaction studied via femtoscopy in p + Nb reactions at $\mathbf{\sqrt{s_{NN}}=3.18} ~\mathrm{\bf{GeV}}$

HADES

Collaboration

•

J. Adamczewski-Musch
(
- Darmstadt, GSI
)

Feb 29, 2016

12 pages

Published in:

Phys.Rev.C 94 (2016) 2, 025201

Published: Aug 4, 2016

e-Print:

1602.08880 [nucl-ex]

DOI:

10.1103/PhysRevC.94.025201

Experiments:

GSI-HADES

View in:

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Abstract: (APS)

We report on the first measurement of pΛ and pp correlations via the femtoscopy method in p + Nb reactions at sNN=3.18GeV, studied with the High Acceptance Di-Electron Spectrometer (HADES). By comparing the experimental correlation function to model calculations, a source size for pp pairs of r0,pp=2.02±0.01(stat)−0.12+0.11(sys)fm and a slightly smaller value for pΛ pairs of r0,Λp=1.62±0.02(stat)−0.08+0.19(sys)fm are extracted. Using the geometrical extent of the particle-emitting region, determined experimentally with pp correlations as reference together with a source function from a transport model, it is possible to study different sets of scattering parameters. The pΛ correlation is proven to be sensitive to predicted scattering length values from chiral effective field theory. We demonstrate that the femtoscopy technique can be used as a valid alternative to the analysis of scattering data to study the hyperon-nucleon interaction.

Note:

12 pages, 11 figures

p Lambda: interaction
effective field theory: chiral
p Lambda: correlation
p p: correlation
scattering
correlation function
scattering length
transport theory
spectrometer
acceptance

References(56)

Figures(11)

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