Электронный каталог

Статья

Acharya, S.
Investigating the Composition of the K&sup(* )&sub(0)(700) State with *p&sup(*()K*0&sub(S) Correlations at the LHC / S.Acharya, B.Batyunya, C.Ceballos Sanchez, R.A.Diaz, S.Grigoryan, A.Kondratyev, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, A.Vodopyanov, [ALICE Collab.] // Physics Letters B [Electronic resource]. – 2024. – Vol. 856. – P. 138915. – URL: https://doi.org/10.1016/j.physletb.2024.138915. – Bibliogr.: 45.

The first measurements of femtoscopic correlations with the particle pair combinations *p&sup(*()K*0&sub(S) 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&sup(∗ )&sub(0) (700) particle that has been considered a tetraquark candidate for over forty years. Source 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 in the *p&sup(*()K*0&sub(S) system is modeled through a resonant scattering amplitude, defined in terms of a mass and a coupling parameter, 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&sup(∗ )&sub(0) (700). The small value and increase of the correlation strength with increasing source size support the hypothesis that the K&sup(∗ )&sub(0) (700) is a four-quark state, i.e. a tetraquark state of the form (q&sub(1), q^-&sub(2), q&sub(3), q^-&sub(3)) in which q&sub(1), q&sub(2) and q&sub(3) indicate the flavor of the valence quarks of the *p and K*0&sub(S). This latter trend is also confirmed via a simple geometric model that assumes a tetraquark structure of the K&sup(∗ )&sub(0) (700) resonance.



Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 346.6д1 - Чармоний, боттомоний, топ-кварк. Очарованные частицы и др. резонансы из тяжелых кварков
ОИЯИ = ОИЯИ (JINR)2024