Электронный каталог

Статья

Acharya, S.
Accessing the Strong Interaction between *L Baryons and Charged Kaons with the Femtoscopy Technique 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]. – 2023. – Vol.845. – P.138145. – URL: https://doi.org/10.1016/j.physletb.2023.138145. – Bibliogr.:74.

The interaction between Λ baryons and kaons/antikaons is a crucial ingredient for the strangeness S=0 and S=−2 sector of the meson–baryon interaction at low energies. In particular, the ΛK might help in understanding the origin of states such as the *K(1620), whose nature and properties are still under debate. Experimental data on Λ–K and Λ–K^- systems are scarce, leading to large uncertainties and tension between the available theoretical predictions constrained by such data. In this Letter we present the measurements of Λ–K+⊕Λ^--K−and Λ–K−⊕Λ^-–K+correlations obtained in the high-multiplicity triggered data sample in pp collisions at √s=13TeV recorded by ALICE at the LHC. The correlation function for both pairs is modeled using the Lednický–Lyuboshits analytical formula and the corresponding scattering parameters are extracted. The Λ–K−⊕Λ^-–K+correlations show the presence of several structures at relative momenta k∗above 200 MeV/c, compatible with the Λ baryon, the *K(1690), and *K(1820)resonances decaying into Λ–K−pairs. The low k∗region in the Λ–K−⊕Λ^-–K+also exhibits the presence of the *K(1620)state, expected to strongly couple to the measured pair. The presented data allow to access the ΛK+and ΛK−strong interaction with an unprecedented precision and deliver the first experimental observation of the *K(1620)decaying into ΛK−.



Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 343 в - Взаимодействие протонов с ядрами (Z>2). Изобарно- аналоговые состояния
Спец.(статьи,препринты) = С 324.1б - Сильные взаимодействия. Электромагнитная структура частиц. Алгебра токов. Киральные теории. Теория Редже$
ОИЯИ = ОИЯИ (JINR)2023