Measurements of H Λ 3 and H Λ 4 Lifetimes and Yields in Au + Au Collisions in the High Baryon Density Region

Journal Article · 17 May 2022 · Physical Review Letters

DOI: https://doi.org/10.1103/physrevlett.128.202301 · OSTI ID:1862332

Abdallah, M.  S.; Aboona, B.  E.; Adam, J.; Adamczyk, L.; Adams, J.  R.; Adkins, J.  K.; Agakishiev, G.; Aggarwal, I.; Aggarwal, M.  M.; Ahammed, Z.; Alekseev, I.; Anderson, D.  M.; Aparin, A.; Aschenauer, E.  C.; Ashraf, M.  U.; Atetalla, F.  G.; Attri, A.; Averichev, G.  S.; Bairathi, V.; Baker, W. ; Ball Cap, J.  G.; Barish, K.; Behera, A.; Bellwied, R.; Bhagat, P.; Bhasin, A.; Bielcik, J.; Bielcikova, J.; Bordyuzhin, I.  G.; Brandenburg, J.  D.; Brandin, A.  V.; Bunzarov, I.; Cai, X.  Z.; Caines, H.; Calderón de la Barca Sánchez, M.; Cebra, D.; Chakaberia, I.; Chaloupka, P.; Chan, B.  K.; Chang, F-H; Chang, Z.; Chankova-Bunzarova, N.; Chatterjee, A.; Chattopadhyay, S.; Chen, D.; Chen, J.; Chen, J.  H.; Chen, X.; Chen, Z.; Cheng, J.; Chevalier, M.; Choudhury, S.; Christie, W.; Chu, X.; Crawford, H.  J.; Csanád, M.; Daugherity, M.; Dedovich, T.  G.; Deppner, I.  M.; Derevschikov, A.  A.; Dhamija, A.; Di Carlo, L.; Didenko, L.; Dixit, P.; Dong, X.; Drachenberg, J.  L.; Duckworth, E.; Dunlop, J.  C.; Elsey, N.; Engelage, J.; Eppley, G.; Esumi, S.; Evdokimov, O.; Ewigleben, A.; Eyser, O.; Fatemi, R.; Fawzi, F.  M.; Fazio, S.; Federic, P.; Fedorisin, J.; Feng, C.  J.; Feng, Y.; Filip, P.; Finch, E.; Fisyak, Y.; Francisco, A.; Fu, C.; Fulek, L.; Gagliardi, C.  A.; Galatyuk, T.; Geurts, F.; Ghimire, N.; Gibson, A.; Gopal, K.; Gou, X.; Grosnick, D.; Gupta, A.; Guryn, W.; Hamad, A.  I.; Hamed, A.; Han, Y.; Harabasz, S.; Harasty, M.  D.; Harris, J.  W.; Harrison, H.; He, S.; He, W.; He, X.  H.; He, Y.; Heppelmann, S.; Heppelmann, S.; Herrmann, N.; Hoffman, E.; Holub, L.; Hu, Y.; Huang, H.; Huang, H.  Z.; Huang, S.  L.; Huang, T.; Huang, X.; Huang, Y.; Humanic, T.  J.; Igo, G.; Isenhower, D.; Jacobs, W.  W.; Jena, C.; Jentsch, A.; Ji, Y.; Jia, J.; Jiang, K.; Ju, X.; Judd, E.  G.; Kabana, S.; Kabir, M.  L.; Kagamaster, S.; Kalinkin, D.; Kang, K.; Kapukchyan, D.; Kauder, K.; Ke, H.  W.; Keane, D.; Kechechyan, A.; Kelsey, M.; Khyzhniak, Y.  V.; Kikoła, D.  P.; Kim, C.; Kimelman, B.; Kincses, D.; Kisel, I.; Kiselev, A.; Knospe, A.  G.; Ko, H.  S.; Kochenda, L.; Kosarzewski, L.  K.; Kramarik, L.; Kravtsov, P.; Kumar, L.; Kumar, S.; Kunnawalkam Elayavalli, R.; Kwasizur, J.  H.; Lacey, R.; Lan, S.; Landgraf, J.  M.; Lauret, J.; Lebedev, A.; Lednicky, R.; Lee, J.  H.; Leung, Y.  H. ; Lewis, N.; Li, C.; Li, C.; Li, W.; Li, X.; Li, Y.; Liang, X.; Liang, Y.; Licenik, R.; Lin, T.; Lin, Y.; Lisa, M.  A.; Liu, F.; Liu, H.; Liu, H.; Liu, P.; Liu, T.; Liu, X.; Liu, Y.; Liu, Z.; Ljubicic, T.; Llope, W.  J.; Longacre, R.  S.; Loyd, E.; Lukow, N.  S.; Luo, X.  F.; Ma, L.; Ma, R.; Ma, Y.  G.; Magdy, N.; Mallick, D.; Margetis, S.; Markert, C.; Matis, H.  S.; Mazer, J.  A.; Minaev, N.  G.; Mioduszewski, S.; Mohanty, B.; Mondal, M.  M.; Mooney, I.; Morozov, D.  A.; Mukherjee, A.; Nagy, M.; Nam, J.  D.; Nasim, Md; Nayak, K.; Neff, D.; Nelson, J.  M.; Nemes, D.  B.; Nie, M.; Nigmatkulov, G.; Niida, T.; Nishitani, R.; Nogach, L.  V.; Nonaka, T.; Nunes, A.  S.; Odyniec, G.; Ogawa, A.; Oh, S.; Okorokov, V.  A.; Page, B.  S.; Pak, R.; Pan, J.; Pandav, A.; Pandey, A.  K.; Panebratsev, Y.; Parfenov, P.; Pawlik, B.; Pawlowska, D.; Perkins, C.; Pinsky, L.; Pintér, R.  L.; Pluta, J.; Pokhrel, B.  R.; Ponimatkin, G.; Porter, J.; Posik, M.; Prozorova, V.; Pruthi, N.  K.; Przybycien, M.; Putschke, J.; Qiu, H.; Quintero, A.; Racz, C.; Radhakrishnan, S.  K.; Raha, N.; Ray, R.  L.; Reed, R.; Ritter, H.  G.; Robotkova, M.; Rogachevskiy, O.  V.; Romero, J.  L.; Roy, D.; Ruan, L.; Rusnak, J.; Sahoo, A.  K.; Sahoo, N.  R.; Sako, H.; Salur, S.; Sandweiss, J.; Sato, S.; Schmidke, W.  B.; Schmitz, N.; Schweid, B.  R.; Seck, F.; Seger, J.; Sergeeva, M.; Seto, R.; Seyboth, P.; Shah, N.; Shahaliev, E.; Shanmuganathan, P.  V.; Shao, M.; Shao, T.; Sheikh, A.  I.; Shen, D.  Y.; Shi, S.  S.; Shi, Y.; Shou, Q.  Y.; Sichtermann, E.  P.; Sikora, R.; Simko, M.; Singh, J.; Singha, S.; Skoby, M.  J.; Smirnov, N.; Söhngen, Y.; Solyst, W.; Sorensen, P.; Spinka, H.  M.; Srivastava, B.; Stanislaus, T.  D. S.; Stefaniak, M.; Stewart, D.  J.; Strikhanov, M.; Stringfellow, B.; Suaide, A.  A. P.; Sumbera, M.; Summa, B.; Sun, X.  M.; Sun, X.; Sun, Y.; Sun, Y.; Surrow, B.; Svirida, D.  N.; Sweger, Z.  W.; Szymanski, P.; Tang, A.  H.; Tang, Z.; Taranenko, A.; Tarnowsky, T.; Thomas, J.  H.; Timmins, A.  R.; Tlusty, D.; Todoroki, T.; Tokarev, M.; Tomkiel, C.  A.; Trentalange, S.; Tribble, R.  E.; Tribedy, P.; Tripathy, S.  K.; Truhlar, T.; Trzeciak, B.  A.; Tsai, O.  D.; Tu, Z.; Ullrich, T.; Underwood, D.  G.; Upsal, I.; Van Buren, G.; Vanek, J.; Vasiliev, A.  N.; Vassiliev, I.; Verkest, V.; Videbaek, F.; Vokal, S.; Voloshin, S.  A.; Wang, F.; Wang, G.; Wang, J.  S.; Wang, P.; Wang, X.; Wang, Y.; Wang, Y.; Wang, Z.; Webb, J.  C.; Weidenkaff, P.  C.; Wen, L.; Westfall, G.  D.; Wieman, H.; Wissink, S.  W.; Witt, R.; Wu, J.; Wu, J.; Wu, Y.; Xi, B.; Xiao, Z.  G.; Xie, G.; Xie, W.; Xu, H.; Xu, N.; Xu, Q.  H.; Xu, Y.; Xu, Z.; Xu, Z.; Yan, G.; Yang, C.; Yang, Q.; Yang, S.; Yang, Y.; Ye, Z.; Ye, Z.; Yi, L.; Yip, K.; Yu, Y.; Zbroszczyk, H.; Zha, W.; Zhang, C.; Zhang, D.; Zhang, J.; Zhang, S.; Zhang, S.; Zhang, X.  P.; Zhang, Y.; Zhang, Y.; Zhang, Y.; Zhang, Z.  J.; Zhang, Z.; Zhang, Z.; Zhao, J.; Zhou, C.; Zhou, Y.; Zhu, X.; Zurek, M.; Zyzak, M.

We report precision measurements of hypernuclei $$^3_ΛH$$ and $$^4_ΛH$$ lifetimes obtained from Au + Au collisions at $$\sqrt{sNN}$$ = 3.0 GeV and 7.2 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider, and the first measurement of $$^3_ΛH$$ and $$^4_ΛH$$ midrapidity yields in Au + Au collisions at $$\sqrt{sNN}$$ = 3.0 GeV. $$^3_ΛH$$ and $$^4_ΛH$$, being the two simplest bound states composed of hyperons and nucleons, are cornerstones in the field of hypernuclear physics. Their lifetimes are measured to be 221 ± 15 (stat) ± 19 (syst) ps for $$^3_ΛH$$ and 218 ± 6 (stat) ± 13 (syst) ps for $$^4_ΛH$$. The p_T-integrated yields of $$^3_ΛH$$ and $$^4_ΛH$$ are presented in different centrality and rapidity intervals. It is observed that the shape of the rapidity distribution of $$4_ΛH$$ is different for 0%–10% and 10%–50% centrality collisions. Thermal model calculations, using the canonical ensemble for strangeness, describes the $$^3_ΛH$$ yield well, while underestimating the $$^4_ΛH$$ yield. Transport models, combining baryonic mean-field and coalescence (jam) or utilizing dynamical cluster formation via baryonic interactions (phqmd) for light nuclei and hypernuclei production, approximately describe the measured $$^3_ΛH$$ and $$^4_ΛH$$ yields. Our measurements provide means to precisely assess our understanding of the fundamental baryonic interactions with strange quarks, which can impact our understanding of more complicated systems involving hyperons, such as the interior of neutron stars or exotic hypernuclei.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Contributing Organization: STAR Collaboration
• Grant/Contract Number: SC0012704
• OSTI ID: 1862332
• Report Number(s): BNL-222915-2022-JAAM
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 20 Vol. 128; ISSN 0031-9007
• Publisher: American Physical Society (APS)Copyright Statement
• Country of Publication: United States
• Language: English