Szczegóły publikacji
Opis bibliograficzny
Measurement of the ${}^{3}_{\Lambda}H$ lifetime in Au+Au collisions at the BNL Relativistic Heavy Ion Collider / L. ADAMCZYK, [et al.], Ł. FULEK, [et al.], M. PRZYBYCIEŃ, [et al.], R. SIKORA, [et al.] // Physical Review. C ; ISSN 2469-9985. — Tytuł poprz.: Physical Review. C, Nuclear Physics ; ISSN: 0556-2813. — 2018 — vol. 97 iss. 5 art. no. 054909, s. 054909-1–054909-7. — Bibliogr. s. 054909-7. — Publikacja dostępna online od: 2018-05-22
Autorzy (350)
Dane bibliometryczne
| ID BaDAP | 116076 |
|---|---|
| Data dodania do BaDAP | 2018-09-12 |
| Tekst źródłowy | URL |
| DOI | 10.1103/PhysRevC.97.054909 |
| Rok publikacji | 2018 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Physical Review, C |
Abstract
An improved measurement of the H-3(Lambda) lifetime is presented. In this paper, the mesonic decay modes H-3(Lambda) -> He-3 + pi(-) and H-3(Lambda) -> d + p + pi(-) are used to reconstruct the H-3(Lambda) from Au+Au collision data collected by the STAR collaboration at Relativistic Heavy Ion Collider (RHIC) A minimum chi(2) estimation is used to determine the lifetime tau = 142(+21)(-24 )(stat.)+/- 29 (syst.) ps. This lifetime is about 50% shorter than the lifetime tau = 263 +/- 2 ps of a free A, indicating strong hyperon-nucleon interaction in the hypernucleus system. The branching ratios of the mesonic decay channels are also determined to satisfy B.R.(He-3+ pi(-))/(B.R.(H-3+pi(-))/B.R.((d+p+pi))) = 0.32 +/- 0.05 (stat.)+/- 0.08 (syst.). Our ratio result favors the assignment J(H-3(Lambda)) = 1/2 over J(H-3(Lambda)) = 3/2. These measurements will help to constrain models of hyperon-baryon interactions.
