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Experimental Evidence for an Attractive p-φ Interaction

Acharya, S ; Adolfsson, Jonatan LU ; Basu, Sumit LU orcid ; Christiansen, Peter LU ; Matonoha, Oliver LU ; Nassirpour, Adrian LU orcid ; Ohlson, Alice LU ; Oskarsson, Anders LU ; Richert, Tuva LU and Vazquez Rueda, Omar LU , et al. (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)
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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}},
}