Measurement of [formula omitted] and [formula omitted] binding energy in Au+Au collisions at [formula omitted] = 3 GeV

M S Abdallah ,X Dong,G Van Buren,L Ruan,J Cheng,S Harabasz,Y Feng,R Nishitani,C Racz,D Kincses,D Wielanek,A Hamed,D Keane,O Eyser,E Duckworth,B Pawlik,D Isenhower,N Raha,H Caines,L Didenko,W Solyst,T Todoroki,T Ullrich,A Lebedev,M Shao,B Kimelman,P Chaloupka,S Margetis,D Mallick,D Cebra,N Schmitz,J Pluta,J Porter,A Dhamija,W Zha,R Witt,G Eppley,N Xu,J Adam,A Gibson,Y Hu,I Vassiliev,K Kauder,Md Nasim,D Kapukchyan,C Perkins,R Kunnawalkam Elayavalli,S Lan,K Jiang,S Trentalange,Y Söhngen,S Heppelmann,R Seto,K Yip,T Tarnowsky,M Posik,R Lacey,F Videbæk,W Christie,Y Huang,S Kabana,X Gou,G Wang,J Lauret,J Atchison,M Robotkova,Z Chang,A Ogawa,E Loyd,P Bhagat,D Grosnick,T Galatyuk,M Sergeeva,D Tlusty,R Pak,W Guryn,S Mioduszewski,R Ma,Y Zhang,R Fatemi,V Verkest,G Odyniec,R Sharma,Y Fisyak,S Fazio,S Esumi,E Finch,J Engelage,T Truhlar,A Ewigleben,V Prozorova,B Stringfellow,A Pandav,A Quintero,N Herrmann,P Seyboth,F Liu,Rajarshi Ray ,Z.j Zhang ,B Xi ,J.h Lee ,N Magdy ,Z Ahammed ,X Chu ,Y Li ,L Yi ,Juan Wu ,S W Wissink ,C Zhang ,M A Lisa ,M J Skoby ,C A Gagliardi ,C Jena ,P Wang ,L Holub ,L K Kosarzewski ,O Evdokimov ,C Li ,T J Humanic ,K Nayak ,B Surrow ,X Chen ,E G Judd ,L Di Carlo ,T Shao ,N Smirnov ,J Bielčíková ,E C Aschenauer ,S Salur ,J Bielčík ,D G Underwood ,M M Aggarwal ,B Srivastava ,H S Ko ,R Sikora ,Tingting Lu ,Z Li ,Y V Khyzhniak ,F Wang ,H Xu ,Sanjeev Kumar ,J K Adkins ,H Wieman ,C Y Tsang ,H Sako ,D.b Nemes ,J Pan ,I Mooney ,Z W Sweger ,R Reed ,N Sahoo ,X Ju ,T Niida ,J Jia ,Yi‐Chun Lin ,F J M Geurts ,W Baker ,A Gupta ,S Sato ,D Chen ,J Seger ,M Nie ,X Liang ,S Huang ,J L Romero ,J H Thomas ,M Calderón De La Barca Sánchez ,S A Voloshin ,Y Wang ,Alexandre Alarcon Do Passo Suaide ,M D Harasty ,X Cai ,M I Nagy ,J R Adams ,J W Harris ,K N Barish ,I Chakaberia ,S Singha ,X Wang ,Sridhar Tripathy ,Qiang Yang ,K Shen ,M L Kabir ,G Xie ,Ashok Kumar Pandey ,M Żurek ,P Dixit ,S Zhang ,S Kagamaster ,J Zhao ,Yan Zhou ,Song He ,S B Yang ,Z Wang ,Z Ye ,J Zhang ,D Roy ,T Ljubičić ,B Mohanty ,D Neff ,J Ball ,T Nonaka ,S S Shi ,A Chatterjee ,D V Kalinkin ,R Bellwied ,X Li ,Y Xu ,M Daugherity ,S Oh ,N K Pruthi ,B R Pokhrel ,W Li ,F M Fawzi ,S Chattopadhyay ,J D Nam ,L Kumar ,J.s Wang ,K Kang ,L Adamczyk ,T D S Stanislaus ,P Liu ,C Hu ,B A Trzeciak ,Y Shi ,Y Ji ,G D Westfall ,Nirmal Ghimire ,R E Tribble ,S Choudhury ,Z Tang ,C Jin ,Jing Zhou ,J Chen ,B E Aboona ,D Pawłowska ,P Chowdhury ,H Zbroszczyk ,J L Drachenberg ,I M Deppner ,J D Brandenburg ,H S Matis ,D Zhang ,H Harrison ,J C Webb ,O D Tsai ,Yugang Ma ,D M Anderson ,A Jentsch ,L Kramárik ,A Mukherjee ,Eric A Hoffman ,A H Tang ,H Liu ,J C Dunlop ,E P Sichtermann ,Jagbir Singh ,W Xie ,X Liu ,N A Lewis ,M Kelsey ,B.r Schweid ,A Francisco ,T Huang ,A R Timmins ,W W Jacobs ,Ayan Paul ,Y H Leung ,Feng Zhao ,J Putschke ,L Ma ,T Lin ,Z Qin ,H J Crawford ,A Behera ,X He ,A G Knospe ,W J Llope ,Xuan Luo ,V Bairathi ,M U Ashraf ,I Aggarwal ,T Liu ,Y J Sun ,W B Schmidke ,B K Chan ,A Kiselev ,P Tribedy ,X Sun ,Q Shou ,D P Kikoła ,Yan He ,N Shah ,C Yang ,J Vaněk ,C Feng ,M Šumbera ,J.h Chen ,Z Zhang ,X Huang ,W He ,C Zhou ,Zhiguang Xiao ,N S Lukow ,J M Landgraf ,Yan Song ,Z Tu ,A S Nain ,Qiang Hu ,F Seck ,D J Stewart ,A I Sheikh ,Y Liang ,C.a Tomkiel ,B S Page ,H Z Huang ,R Licenik ,M Przybycień ,A S Nunes ,Q.h Xu ,Y Han ,H W Ke ,H Qiu ,C Markert ,D Y Shen ,Xinmei Zhu ,M Csanád ,Z Chen ,J.a Mazer ,K Okubo ,S K Radhakrishnan ,Cheng Dong Fu ,Yuqi Yang ,J M Nelson ,P Sinha ,Yangyi Yu ,M Zhao ,P Szymański ,Yan Gao ,P C Weidenkaff ,A K Sahoo ,A Bhasin ,R S Longacre ,M Isshiki ,K Gopal ,H.g Ritter ,M Stefaniak ,Y Liu ,Z Xu ,M M Mondal ,Y Wu ,L Pinsky ,P V Shanmuganathan ,I Upsal ,J H Kwasizur ,I Kisel ,M Zyzak

doi:10.1016/j.physletb.2022.137449

Abstract

Measurements of mass and Λ binding energy of Λ4H and Λ4He in Au+Au collisions at sNN=3 GeV are presented, with an aim to address the charge symmetry breaking (CSB) problem in hypernuclei systems with atomic number A = 4. The Λ binding energies are measured to be 2.22±0.06(stat.)±0.14(syst.) MeV and 2.38±0.13(stat.)±0.12(syst.) MeV for Λ4H and Λ4He, respectively. The measured Λ binding-energy difference is 0.16±0.14(stat.)±0.10(syst.) MeV for ground states. Combined with the γ-ray transition energies, the binding-energy difference for excited states is −0.16±0.14(stat.)±0.10(syst.) MeV, which is negative and comparable to the value of the ground states within uncertainties. These new measurements on the Λ binding-energy difference in A = 4 hypernuclei systems are consistent with the theoretical calculations that result in ΔBΛ4(1exc+)≈−ΔBΛ4(0g.s.+)<0 and present a new method for the study of CSB effect using relativistic heavy-ion collisions.

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