Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC
(2019) In Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics 797.- Abstract
- This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in (Figure presented.) collisions at s=13 TeV and p–Pb collisions at sNN=5.02 TeV, combined with previously published results from (Figure presented.) collisions at s=7 TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length f0 −1 and the effective range d0, is constrained by comparing the measured Λ–Λ correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice... (More)
- This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in (Figure presented.) collisions at s=13 TeV and p–Pb collisions at sNN=5.02 TeV, combined with previously published results from (Figure presented.) collisions at s=7 TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length f0 −1 and the effective range d0, is constrained by comparing the measured Λ–Λ correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice computations, both predicting a shallow attractive interaction, and permit to test different theoretical approaches describing the Λ–Λ interaction. The region in the (f0 −1,d0) plane which would accommodate a Λ–Λ bound state is substantially restricted compared to previous studies. The binding energy of the possible Λ–Λ bound state is estimated within an effective-range expansion approach and is found to be BΛΛ=3.2−2.4 +1.6(stat)−1.0 +1.8(syst) MeV. © 2019 The Author(s) (Less)
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https://lup.lub.lu.se/record/0698ef37-1a6d-40a0-ac8d-1d32b980849c
- author
- Acharya, S ; Adolfsson, Jonatan LU ; Christiansen, Peter LU ; Nassirpour, Adrian LU ; Oskarsson, Anders LU ; Richert, Tuva LU ; Vazquez Rueda, Omar LU ; Silvermyr, David LU ; Stenlund, Evert LU and Zurlo, N
- author collaboration
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
- volume
- 797
- article number
- 134822
- publisher
- Elsevier
- external identifiers
-
- scopus:85070895177
- ISSN
- 0370-2693
- DOI
- 10.1016/j.physletb.2019.134822
- language
- English
- LU publication?
- yes
- additional info
- Export Date: 9 September 2019
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- 0698ef37-1a6d-40a0-ac8d-1d32b980849c
- date added to LUP
- 2019-09-09 13:11:14
- date last changed
- 2023-04-09 23:03:37
@article{0698ef37-1a6d-40a0-ac8d-1d32b980849c, abstract = {{This work presents new constraints on the existence and the binding energy of a possible Λ–Λ bound state, the H-dibaryon, derived from Λ–Λ femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in (Figure presented.) collisions at s=13 TeV and p–Pb collisions at sNN=5.02 TeV, combined with previously published results from (Figure presented.) collisions at s=7 TeV. The Λ–Λ scattering parameter space, spanned by the inverse scattering length f0 −1 and the effective range d0, is constrained by comparing the measured Λ–Λ correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice computations, both predicting a shallow attractive interaction, and permit to test different theoretical approaches describing the Λ–Λ interaction. The region in the (f0 −1,d0) plane which would accommodate a Λ–Λ bound state is substantially restricted compared to previous studies. The binding energy of the possible Λ–Λ bound state is estimated within an effective-range expansion approach and is found to be BΛΛ=3.2−2.4 +1.6(stat)−1.0 +1.8(syst) MeV. © 2019 The Author(s)}}, author = {{Acharya, S and Adolfsson, Jonatan and Christiansen, Peter and Nassirpour, Adrian and Oskarsson, Anders and Richert, Tuva and Vazquez Rueda, Omar and Silvermyr, David and Stenlund, Evert and Zurlo, N}}, issn = {{0370-2693}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics}}, title = {{Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC}}, url = {{http://dx.doi.org/10.1016/j.physletb.2019.134822}}, doi = {{10.1016/j.physletb.2019.134822}}, volume = {{797}}, year = {{2019}}, }