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Investigating the nature of the K∗0(700) state with π±K0S correlations at the LHC (2024)


ALICE Collaboration. (2024). Investigating the nature of the K∗0(700) state with π±K0S correlations at the LHC. Physics Letters B, 856, Article 138915. https://doi.org/10.1016/j.physletb.2024.138915


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Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajatALICE Collaboration

Lehti tai sarjaPhysics Letters B

ISSN0370-2693

eISSN1873-2445

Julkaisuvuosi2024

Ilmestymispäivä30.07.2024

Volyymi856

Artikkelinumero138915

KustantajaElsevier

JulkaisumaaAlankomaat

Julkaisun kielienglanti

DOIhttps://doi.org/10.1016/j.physletb.2024.138915

Linkki tutkimusaineistoonhttps://www.hepdata.net/record/ins2739149

Julkaisun avoin saatavuusAvoimesti saatavilla

Julkaisukanavan avoin saatavuusKokonaan avoin julkaisukanava

Julkaisu on rinnakkaistallennettu (JYX)https://jyx.jyu.fi/handle/123456789/96825

Rinnakkaistallenteen verkko-osoite (pre-print) https://doi.org/10.48550/arXiv.2312.12830


Tiivistelmä

The first measurements of femtoscopic correlations with the particle pair combinations π±K0S in pp collisions at s√=13 TeV at the Large Hadron Collider (LHC) are reported by the ALICE experiment. Using the femtoscopic approach, it is shown that it is possible to study the elusive K∗0(700) particle that has been considered a tetraquark candidate for over forty years. Boson source parameters and final-state interaction parameters are extracted by fitting a model assuming a Gaussian source to the experimentally measured two-particle correlation functions. The final-state interaction is modeled through a resonant scattering amplitude, defined in terms of a mass and a coupling parameter, decaying into a π±K0S pair. The extracted mass and Breit-Wigner width, derived from the coupling parameter, of the final-state interaction are found to be consistent with previous measurements of the K∗0(700). The small value and increasing behavior of the correlation strength with increasing source size support the hypothesis that the K∗0(700) is a four-quark state, i.e. a tetraquark state. This latter trend is also confirmed via a simple geometric model that assumes a tetraquark structure of the K∗0(700) resonance.


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OKM-raportointiKyllä

VIRTA-lähetysvuosi2024

Alustava JUFO-taso3


Viimeisin päivitys 2024-14-10 klo 15:10