Experimental Evidence for an Attractive p-φ Interaction
(2021) In Physical Review Letters 127(17).- Abstract
- This Letter presents the first experimental evidence of the attractive strong interaction between a proton and a φ meson. The result is obtained from two-particle correlations of combined p-φ p¯-φ pairs measured in high-multiplicity pp collisions at s=13 TeV by the ALICE Collaboration. The spin-averaged scattering length and effective range of the p-φ interaction are extracted from the fully corrected correlation function employing the Lednický-Lyuboshits approach. In particular, the imaginary part of the scattering length vanishes within uncertainties, indicating that inelastic processes do not play a prominent role for the p-φ interaction. These data demonstrate that the interaction is dominated by elastic p-φ scattering. Furthermore, an... (More)
- This Letter presents the first experimental evidence of the attractive strong interaction between a proton and a φ meson. The result is obtained from two-particle correlations of combined p-φ p¯-φ pairs measured in high-multiplicity pp collisions at s=13 TeV by the ALICE Collaboration. The spin-averaged scattering length and effective range of the p-φ interaction are extracted from the fully corrected correlation function employing the Lednický-Lyuboshits approach. In particular, the imaginary part of the scattering length vanishes within uncertainties, indicating that inelastic processes do not play a prominent role for the p-φ interaction. These data demonstrate that the interaction is dominated by elastic p-φ scattering. Furthermore, an analysis employing phenomenological Gaussian- and Yukawa-type potentials is conducted. Under the assumption of the latter, the N-φ coupling constant is found to be gN-φ=0.14±0.03(stat)±0.02(syst). This work provides valuable experimental input to accomplish a self-consistent description of the N-φ interaction, which is particularly relevant for the more fundamental studies on partial restoration of chiral symmetry in nuclear medium. © 2021 CERN. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/33e414c2-8d17-4138-ad17-34fe0da9a870
- author
- author collaboration
- organization
- publishing date
- 2021
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Atomic physics, Correlation function, Effective range, Experimental evidence, High multiplicity, Imaginary parts, Inelastic process, Scattering length, Strong interaction, Two-particle correlations, Uncertainty, Tellurium compounds, article, chirality, correlation function, uncertainty
- in
- Physical Review Letters
- volume
- 127
- issue
- 17
- article number
- 172301
- publisher
- American Physical Society
- external identifiers
-
- scopus:85119580268
- pmid:34739260
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.127.172301
- language
- English
- LU publication?
- yes
- id
- 33e414c2-8d17-4138-ad17-34fe0da9a870
- date added to LUP
- 2022-01-20 19:31:15
- date last changed
- 2023-04-02 20:59:10
@article{33e414c2-8d17-4138-ad17-34fe0da9a870, abstract = {{This Letter presents the first experimental evidence of the attractive strong interaction between a proton and a φ meson. The result is obtained from two-particle correlations of combined p-φ p¯-φ pairs measured in high-multiplicity pp collisions at s=13 TeV by the ALICE Collaboration. The spin-averaged scattering length and effective range of the p-φ interaction are extracted from the fully corrected correlation function employing the Lednický-Lyuboshits approach. In particular, the imaginary part of the scattering length vanishes within uncertainties, indicating that inelastic processes do not play a prominent role for the p-φ interaction. These data demonstrate that the interaction is dominated by elastic p-φ scattering. Furthermore, an analysis employing phenomenological Gaussian- and Yukawa-type potentials is conducted. Under the assumption of the latter, the N-φ coupling constant is found to be gN-φ=0.14±0.03(stat)±0.02(syst). This work provides valuable experimental input to accomplish a self-consistent description of the N-φ interaction, which is particularly relevant for the more fundamental studies on partial restoration of chiral symmetry in nuclear medium. © 2021 CERN.}}, author = {{Acharya, S and Adolfsson, Jonatan and Basu, Sumit and Christiansen, Peter and Matonoha, Oliver and Nassirpour, Adrian and Ohlson, Alice and Oskarsson, Anders and Richert, Tuva and Vazquez Rueda, Omar and Silvermyr, David and Zurlo, N}}, issn = {{1079-7114}}, keywords = {{Atomic physics; Correlation function; Effective range; Experimental evidence; High multiplicity; Imaginary parts; Inelastic process; Scattering length; Strong interaction; Two-particle correlations; Uncertainty; Tellurium compounds; article; chirality; correlation function; uncertainty}}, language = {{eng}}, number = {{17}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Experimental Evidence for an Attractive p-φ Interaction}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.127.172301}}, doi = {{10.1103/PhysRevLett.127.172301}}, volume = {{127}}, year = {{2021}}, }