Observation of Directed Flow of Hypernuclei H Λ3 and H Λ4 in sNN =3 GeV Au+Au Collisions at RHIC

doi:10.1103/PhysRevLett.130.212301

Observation of Directed Flow of Hypernuclei H Λ3 and H Λ4 in sNN =3 GeV Au+Au Collisions at RHIC

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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.

Original language	English
Article number	212301
Journal	Physical Review Letters
Volume	130
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.130.212301
State	Published - May 26 2023

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Publisher Copyright:
© 2023 American Physical Society.

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General Physics and Astronomy

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10.1103/PhysRevLett.130.212301

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@article{bd04ab27088a4274a34f19c368f9db74,

title = "Observation of Directed Flow of Hypernuclei H Λ3 and H Λ4 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.",

author = "Aboona, {B. E.} and J. Adam and Adams, {J. R.} and G. Agakishiev and I. Aggarwal and Aggarwal, {M. M.} and Z. Ahammed and A. Aitbaev and I. Alekseev and Anderson, {D. M.} and A. Aparin and J. Atchison and Averichev, {G. S.} and V. Bairathi and W. Baker and {Ball Cap}, {J. G.} and K. Barish and P. Bhagat and A. Bhasin and S. Bhatta and Bordyuzhin, {I. G.} and Brandenburg, {J. D.} and Brandin, {A. V.} and Cai, {X. Z.} and H. Caines and {De La Barca S{\'a}nchez}, {M. Calder{\'o}n} and D. Cebra and J. Ceska and I. Chakaberia and Chan, {B. K.} and Z. Chang and D. Chen and J. Chen and Chen, {J. H.} and Z. Chen and J. Cheng and Y. Cheng and S. Choudhury and W. Christie and X. Chu and Crawford, {H. J.} and G. Dale-Gau and A. Das and M. Daugherity and Dedovich, {T. G.} and Deppner, {I. M.} and Derevschikov, {A. A.} and A. Dhamija and {Di Carlo}, L. and R. Fatemi",

note = "Publisher Copyright: {\textcopyright} 2023 American Physical Society. ",

year = "2023",

month = may,

day = "26",

doi = "10.1103/PhysRevLett.130.212301",

language = "English",

volume = "130",

number = "21",

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TY - JOUR

T1 - Observation of Directed Flow of Hypernuclei H Λ3 and H Λ4 in sNN =3 GeV Au+Au Collisions at RHIC

AU - Aboona, B. E.

AU - Adam, J.

AU - Adams, J. R.

AU - Agakishiev, G.

AU - Aggarwal, I.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Aitbaev, A.

AU - Alekseev, I.

AU - Anderson, D. M.

AU - Aparin, A.

AU - Atchison, J.

AU - Averichev, G. S.

AU - Bairathi, V.

AU - Baker, W.

AU - Ball Cap, J. G.

AU - Barish, K.

AU - Bhagat, P.

AU - Bhasin, A.

AU - Bhatta, S.

AU - Bordyuzhin, I. G.

AU - Brandenburg, J. D.

AU - Brandin, A. V.

AU - Cai, X. Z.

AU - Caines, H.

AU - De La Barca Sánchez, M. Calderón

AU - Cebra, D.

AU - Ceska, J.

AU - Chakaberia, I.

AU - Chan, B. K.

AU - Chang, Z.

AU - Chen, D.

AU - Chen, J.

AU - Chen, J. H.

AU - Chen, Z.

AU - Cheng, J.

AU - Cheng, Y.

AU - Choudhury, S.

AU - Christie, W.

AU - Chu, X.

AU - Crawford, H. J.

AU - Dale-Gau, G.

AU - Das, A.

AU - Daugherity, M.

AU - Dedovich, T. G.

AU - Deppner, I. M.

AU - Derevschikov, A. A.

AU - Dhamija, A.

AU - Di Carlo, L.

AU - Fatemi, R.

PY - 2023/5/26

Y1 - 2023/5/26

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.

UR - http://www.scopus.com/inward/record.url?scp=85161648733&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85161648733&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.130.212301

DO - 10.1103/PhysRevLett.130.212301

M3 - Article

C2 - 37295104

AN - SCOPUS:85161648733

SN - 0031-9007

VL - 130

JO - Physical Review Letters

JF - Physical Review Letters

IS - 21

M1 - 212301

ER -

Observation of Directed Flow of Hypernuclei H Λ3 and H Λ4 in sNN =3 GeV Au+Au Collisions at RHIC

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