Exploring the NΛ–NΣ coupled system with high precision correlation techniques at the LHC
ALICE Collaboration. (2022). Exploring the NΛ–NΣ coupled system with high precision correlation techniques at the LHC. Physics Letters B, 833, Article 137272. https://doi.org/10.1016/j.physletb.2022.137272
Published inPhysics Letters B
© 2022 European Organization for Nuclear Research, ALICE. Published by Elsevier B.V. Funded by SCOAP3
The interaction of Λ and Σ hyperons (Y) with nucleons (N) is strongly influenced by the coupled-channel dynamics. Due to the small mass difference of the NΛ and NΣ systems, the coupling strength of the NΣ↔NΛ processes is non-negligible and constitutes a crucial element in the determination of the NΛ interaction. In this letter we present the most precise measurements on the interaction of pΛ pairs, from zero relative momentum up to the opening of the NΣ channel. The correlation function in the relative momentum space for pΛ⊕p¯¯¯Λ¯¯¯¯ pairs measured in high-multiplicity triggered pp collisions at s√ = 13 TeV at the LHC is reported. The opening of the inelastic NΣ channels is visible in the extracted correlation function as a cusp-like structure occurring at relative momentum k∗ = 289 MeV/c. This represents the first direct experimental observation of the NΣ→NΛ coupled channel in the pΛ system. The correlation function is compared with recent chiral effective field theory calculations, based on different strengths of the NΣ↔NΛ transition potential. A weaker coupling, as possibly supported by the present measurement, would require a more repulsive three-body NNΛ interaction for a proper description of the Λ in-medium properties, which has implications on the nuclear equation of state and for the presence of hyperons inside neutron stars. ...
Publication in research information system
MetadataShow full item record
Showing items with similar title or keywords.
Cross-Country Skiing Analysis and Ski Technique Detection by High-Precision Kinematic Global Navigation Satellite System Takeda, Masaki; Miyamoto, Naoto; Endo, Takaaki; Ohtonen, Olli; Lindinger, Stefan; Linnamo, Vesa; Stöggl, Thomas (MDPI AG, 2019)Cross-country skiing (XCS) embraces a broad variety of techniques applied like a gear system according to external conditions, slope topography, and skier-related factors. The continuous detection of applied skiing techniques ...
Bootstrap technique to study correlation between neutron skin thickness and the slope of symmetry energy in atomic nuclei Muir, D.; Pastore, A.; Dobaczewski, Jacek; Barton, C.J. (Jagellonian University, 2018)We examine the proposed correlation between the neutron skin thickness and the slope of the symmetry energy for two doubly-magic nuclei ( 100Sn and 132Sn) and find that a statistically significant correlation appears to ...
Exploring the mass surface near the rare-earth abundance peak via precision mass measurements at JYFLTRAP Vilen, M.; Kelly, J. M.; Kankainen, A.; Brodeur, M.; Aprahamian, A.; Canete, L.; de Groote, R. P.; de Roubin, A.; Eronen, T.; Jokinen, A.; Moore, I. D.; Mumpower, M. R.; Nesterenko, D. A.; O'Brien, J.; Perdomo, A. Pardo; Penttilä, H.; Reponen, M.; Rinta-Antila, S.; Surman, R. (American Physical Society, 2020)The JYFLTRAP double Penning trap at the Ion Guide Isotope Separator On-Line facility has been used to measure the atomic masses of 13 neutron-rich rare-earth isotopes. Eight of the nuclides, 161Pm, 163Sm, 164,165Eu, 167Gd, ...
High-Precision Q-Value Measurement Confirms the Potential of 135Cs for Absolute Antineutrino Mass Scale Determination de Roubin, A.; Kostensalo, J.; Eronen, T.; Canete, L.; de Groote, R. P.; Jokinen, A.; Kankainen, A.; Nesterenko, D. A.; Moore, I. D.; Rinta-Antila, S.; Suhonen, J.; Vilén, M (American Physical Society, 2020)The ground-state-to-ground-state β-decay Q value of 135Cs(7/2+)→135Ba(3/2+) has been directly measured for the first time. The measurement was done utilizing both the phase-imaging ion-cyclotron resonance technique and the ...
Precision mass measurements of 67Fe and 69,70Co: Nuclear structure toward N = 40 and impact on r-process reaction rates Canete, L.; Giraud, S.; Kankainen, A.; Bastin, B.; Nowacki, F.; Poves, A.; Ascher, P.; Eronen, T.; Alcindor, V.; Jokinen, A.; Khanam, A.; Moore, I. D.; Nesterenko, D. A.; De Oliveira Santos, F.; Penttilä, H.; Petrone, C.; Pohjalainen, I.; de Roubin, A.; Rubchenya, V. A.; Vilen, M.; Äystö, J. (American Physical Society, 2020)Accurate mass measurements of neutron-rich iron and cobalt isotopes 67Fe and 69,70Co have been realized with the JYFLTRAP double Penning-trap mass spectrometer. With novel ion-manipulation techniques, the masses of the ...