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

Bibliographical note

Funding Information:
We thank Dr. Y. Nara and Dr. J. Steinheimer for insightful discussions. We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science, the U.S. National Science Foundation, National Natural Science Foundation of China, Chinese Academy of Science, the Ministry of Science and Technology of China and the Chinese Ministry of Education, the Higher Education Sprout Project by Ministry of Education at NCKU, the National Research Foundation of Korea, Czech Science Foundation and Ministry of Education, Youth and Sports of the Czech Republic, Hungarian National Research, Development and Innovation Office, New National Excellency Programme of the Hungarian Ministry of Human Capacities, Department of Atomic Energy and Department of Science and Technology of the Government of India, the National Science Centre and WUT ID-UB of Poland, the Ministry of Science, Education and Sports of the Republic of Croatia, German Bundesministerium für Bildung, Wissenschaft, Forschung and Technologie (BMBF), Helmholtz Association, Ministry of Education, Culture, Sports, Science, and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS).

Publisher Copyright:
© 2023 American Physical Society.

ASJC Scopus subject areas

Physics and Astronomy (all)

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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 = "Funding Information: We thank Dr. Y. Nara and Dr. J. Steinheimer for insightful discussions. We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science, the U.S. National Science Foundation, National Natural Science Foundation of China, Chinese Academy of Science, the Ministry of Science and Technology of China and the Chinese Ministry of Education, the Higher Education Sprout Project by Ministry of Education at NCKU, the National Research Foundation of Korea, Czech Science Foundation and Ministry of Education, Youth and Sports of the Czech Republic, Hungarian National Research, Development and Innovation Office, New National Excellency Programme of the Hungarian Ministry of Human Capacities, Department of Atomic Energy and Department of Science and Technology of the Government of India, the National Science Centre and WUT ID-UB of Poland, the Ministry of Science, Education and Sports of the Republic of Croatia, German Bundesministerium f{\"u}r Bildung, Wissenschaft, Forschung and Technologie (BMBF), Helmholtz Association, Ministry of Education, Culture, Sports, Science, and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS). 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",

}

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.

N1 - Funding Information: We thank Dr. Y. Nara and Dr. J. Steinheimer for insightful discussions. We thank the RHIC Operations Group and RCF at BNL, the NERSC Center at LBNL, and the Open Science Grid consortium for providing resources and support. This work was supported in part by the Office of Nuclear Physics within the U.S. DOE Office of Science, the U.S. National Science Foundation, National Natural Science Foundation of China, Chinese Academy of Science, the Ministry of Science and Technology of China and the Chinese Ministry of Education, the Higher Education Sprout Project by Ministry of Education at NCKU, the National Research Foundation of Korea, Czech Science Foundation and Ministry of Education, Youth and Sports of the Czech Republic, Hungarian National Research, Development and Innovation Office, New National Excellency Programme of the Hungarian Ministry of Human Capacities, Department of Atomic Energy and Department of Science and Technology of the Government of India, the National Science Centre and WUT ID-UB of Poland, the Ministry of Science, Education and Sports of the Republic of Croatia, German Bundesministerium für Bildung, Wissenschaft, Forschung and Technologie (BMBF), Helmholtz Association, Ministry of Education, Culture, Sports, Science, and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS). Publisher Copyright: © 2023 American Physical Society.

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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