Observation of Directed Flow of Hypernuclei HΛ3 and HΛ4 in √sNN =3 GeV Au+Au Collisions at RHIC

Vipul Bairathi; Sonia Kabana; STAR Collaboration

doi:10.1103/PHYSREVLETT.130.212301

Observation of Directed Flow of Hypernuclei H_Λ³ and H_Λ⁴ in √s_NN =3 GeV Au+Au Collisions at RHIC

Título traducido de la contribución: Observación del flujo dirigido de hipernúcleos HΛ3 y HΛ4 en colisiones Au+Au de √sNN = 3 GeV en RHIC

Vipul Bairathi
, Sonia Kabana
, STAR Collaboration

Instituto de Alta Investigación

Universidad de Tarapacá

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

27 Citas (Scopus)

Resumen

Reportamos aquí la primera observación de flujo dirigido (v1) de los hipernúcleos HΛ3 y HΛ4 en colisiones Au+Au centro-medias a √sNN=3 GeV en RHIC. Estos datos se toman como parte del programa de escaneo de energía del haz llevado a cabo por el experimento STAR. A partir de 165×106 eventos en 5%-40% de centralidad, alrededor de 8400 candidatos HΛ3 y 5200 HΛ4 se reconstruyen a través de canales de desintegración de dos y tres cuerpos. Observamos que estos hipernúcleos exhiben un flujo dirigido significativo. Comparándolo con el de los núcleos ligeros, se encuentra que las pendientes v1 de media rapidez de HΛ3 y HΛ4 siguen la escala del número bariónico, lo que implica que la coalescencia es el mecanismo dominante para la producción de estos hipernúcleos en las colisiones Au+Au de 3 GeV.

Título traducido de la contribución	Observación del flujo dirigido de hipernúcleos HΛ3 y HΛ4 en colisiones Au+Au de √sNN = 3 GeV en RHIC
Idioma original	Inglés
Número de artículo	212301
Publicación	Physical Review Letters
Volumen	130
N.º	21
DOI	https://doi.org/10.1103/PHYSREVLETT.130.212301
Estado	Publicada - 24 may. 2023

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title = "Observation of Directed Flow of Hypernuclei HΛ3 and HΛ4 in √sNN =3 GeV Au+Au Collisions at RHIC",

abstract = "We report here the first observation of directed flow (v1) of the hypernuclei HΛ3 and HΛ4 in mid-central Au+Au collisions at √sNN=3 GeV at RHIC. These data are taken as part of the beam energy scan program carried out by the STAR experiment. From 165×106 events in 5\%-40\% centrality, about 8400 HΛ3 and 5200 HΛ4 candidates are reconstructed through two- and three-body decay channels. We observe that these hypernuclei exhibit significant directed flow. Comparing to that of light nuclei, it is found that the midrapidity v1 slopes of HΛ3 and HΛ4 follow baryon number scaling, implying that the coalescence is the dominant mechanism for these hypernuclei production in the 3 GeV Au+Au collisions. ",

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N2 - We report here the first observation of directed flow (v1) of the hypernuclei HΛ3 and HΛ4 in mid-central Au+Au collisions at √sNN=3 GeV at RHIC. These data are taken as part of the beam energy scan program carried out by the STAR experiment. From 165×106 events in 5%-40% centrality, about 8400 HΛ3 and 5200 HΛ4 candidates are reconstructed through two- and three-body decay channels. We observe that these hypernuclei exhibit significant directed flow. Comparing to that of light nuclei, it is found that the midrapidity v1 slopes of HΛ3 and HΛ4 follow baryon number scaling, implying that the coalescence is the dominant mechanism for these hypernuclei production in the 3 GeV Au+Au collisions.

AB - We report here the first observation of directed flow (v1) of the hypernuclei HΛ3 and HΛ4 in mid-central Au+Au collisions at √sNN=3 GeV at RHIC. These data are taken as part of the beam energy scan program carried out by the STAR experiment. From 165×106 events in 5%-40% centrality, about 8400 HΛ3 and 5200 HΛ4 candidates are reconstructed through two- and three-body decay channels. We observe that these hypernuclei exhibit significant directed flow. Comparing to that of light nuclei, it is found that the midrapidity v1 slopes of HΛ3 and HΛ4 follow baryon number scaling, implying that the coalescence is the dominant mechanism for these hypernuclei production in the 3 GeV Au+Au collisions.

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