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Measurement of the HΛ3 lifetime in Au+Au collisions at the BNL Relativistic Heavy Ion Collider
- Adamczyk, L;
- Adams, JR;
- Adkins, JK;
- Agakishiev, G;
- Aggarwal, MM;
- Ahammed, Z;
- Ajitanand, NN;
- Alekseev, I;
- Alford, J;
- Anderson, DM;
- Aoyama, R;
- Aparin, A;
- Arkhipkin, D;
- Aschenauer, EC;
- Ashraf, MU;
- Attri, A;
- Averichev, GS;
- Bai, X;
- Bairathi, V;
- Barish, K;
- Behera, A;
- Bellwied, R;
- Bhasin, A;
- Bhati, AK;
- Bhattarai, P;
- Bielcik, J;
- Bielcikova, J;
- Bland, LC;
- Bordyuzhin, IG;
- Bouchet, J;
- Brandenburg, JD;
- Brandin, AV;
- Brown, D;
- Bryslawskyj, J;
- Bunzarov, I;
- Butterworth, J;
- Caines, H;
- de la Barca Sánchez, M Calderón;
- Campbell, JM;
- Cebra, D;
- Chakaberia, I;
- Chaloupka, P;
- Chang, Z;
- Chankova-Bunzarova, N;
- Chatterjee, A;
- Chattopadhyay, S;
- Chen, X;
- Chen, X;
- Chen, JH;
- Cheng, J;
- Cherney, M;
- Christie, W;
- Contin, G;
- Crawford, HJ;
- Das, S;
- Dedovich, TG;
- Deng, J;
- Deppner, IM;
- Derevschikov, AA;
- Didenko, L;
- Dilks, C;
- Dong, X;
- Drachenberg, JL;
- Draper, JE;
- Dunlop, JC;
- Efimov, LG;
- Elsey, N;
- Engelage, J;
- Eppley, G;
- Esha, R;
- Esumi, S;
- Evdokimov, O;
- Ewigleben, J;
- Eyser, O;
- Fatemi, R;
- Fazio, S;
- Federic, P;
- Federicova, P;
- Fedorisin, J;
- Feng, Z;
- Filip, P;
- Finch, E;
- Fisyak, Y;
- Flores, CE;
- Fujita, J;
- Fulek, L;
- Gagliardi, CA;
- Geurts, F;
- Gibson, A;
- Girard, M;
- Grosnick, D;
- Gunarathne, DS;
- Guo, Y;
- Gupta, A;
- Guryn, W;
- Hamad, AI;
- Hamed, A;
- Harlenderova, A;
- Harris, JW;
- He, L;
- Heppelmann, S;
- Heppelmann, S;
- Herrmann, N;
- Hirsch, A;
- Horvat, S;
- Huang, B;
- Huang, T;
- Huang, X;
- Huang, HZ;
- Humanic, TJ;
- Huo, P;
- Igo, G;
- Jacobs, WW;
- Jentsch, A;
- Jia, J;
- Jiang, K;
- Jowzaee, S;
- Judd, EG;
- Kabana, S;
- Kalinkin, D;
- Kang, K;
- Kapukchyan, D;
- Kauder, K;
- Ke, HW;
- Keane, D;
- Kechechyan, A;
- Khan, Z;
- Kikoła, DP;
- Kim, C;
- Kisel, I;
- Kisiel, A;
- Kochenda, L;
- Kocmanek, M;
- Kollegger, T;
- Kosarzewski, LK;
- Kraishan, AF;
- Krauth, L;
- Kravtsov, P;
- Krueger, K;
- Kulathunga, N;
- Kumar, L;
- Kvapil, J;
- Kwasizur, JH;
- Lacey, R;
- Landgraf, JM;
- Landry, KD;
- Lauret, J;
- Lebedev, A;
- Lednicky, R;
- Lee, JH;
- Li, X;
- Li, W;
- Li, Y;
- Li, C;
- Lidrych, J;
- Lin, T;
- Lisa, MA;
- Liu, F;
- Liu, P;
- Liu, Y;
- Liu, H;
- Ljubicic, T;
- Llope, WJ;
- Lomnitz, M;
- Longacre, RS;
- Luo, X;
- Luo, S;
- L., G;
- Ma, L;
- Ma, R;
- G., Y;
- Magdy, N;
- Majka, R;
- Mallick, D;
- Margetis, S;
- Markert, C;
- Matis, HS;
- Mayes, D;
- Meehan, K;
- Mei, JC;
- Miller, ZW;
- Minaev, NG;
- Mioduszewski, S;
- Mishra, D;
- Mizuno, S;
- Mohanty, B;
- Mondal, MM;
- Morozov, DA;
- Mustafa, MK;
- Nasim;
- Nayak, TK;
- Nelson, JM;
- Nemes, DB;
- Nie, M;
- Nigmatkulov, G;
- Niida, T;
- Nogach, LV;
- Nonaka, T;
- Nurushev, SB;
- Odyniec, G;
- Ogawa, A;
- Oh, K;
- Okorokov, VA;
- Olvitt, D;
- Page, BS;
- Pak, R;
- Pandit, Y;
- Panebratsev, Y;
- Pawlik, B;
- Pei, H;
- Perkins, C;
- Pluta, J;
- Poniatowska, K;
- Porter, J;
- Posik, M;
- Pruthi, NK;
- Przybycien, M;
- Putschke, J;
- Quintero, A;
- Ramachandran, S;
- Ray, RL;
- Reed, R;
- Rehbein, MJ;
- Ritter, HG;
- Roberts, JB;
- Rogachevskiy, OV;
- Romero, JL;
- Roth, JD;
- Ruan, L;
- Rusnak, J;
- Rusnakova, O;
- Sahoo, NR;
- Sahu, PK;
- Salur, S;
- Sandweiss, J;
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- Schmidke, WB;
- Schmitz, N;
- Schweid, BR;
- Seger, J;
- Sergeeva, M;
- Seto, R;
- Seyboth, P;
- Shah, N;
- Shahaliev, E;
- Shanmuganathan, PV;
- Shao, M;
- Shen, WQ;
- Shi, SS;
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- Sichtermann, EP;
- Sikora, R;
- Simko, M;
- Singha, S;
- Skoby, MJ;
- Smirnov, N;
- Smirnov, D;
- Solyst, W;
- Sorensen, P;
- Spinka, HM;
- Srivastava, B;
- Stanislaus, TDS;
- Stewart, DJ;
- Strikhanov, M;
- Stringfellow, B;
- Suaide, AAP;
- Sugiura, T;
- Sumbera, M;
- Summa, B;
- Sun, Y;
- Sun, X;
- Sun, XM;
- Surrow, B;
- Svirida, DN;
- Tang, AH;
- Tang, Z;
- Taranenko, A;
- Tarnowsky, T;
- Tawfik, A;
- Thäder, J;
- Thomas, JH;
- Timmins, AR;
- Tlusty, D;
- Todoroki, T;
- Tokarev, M;
- Trentalange, S;
- Tribble, RE;
- Tribedy, P;
- Tripathy, SK;
- Trzeciak, BA;
- Tsai, OD;
- Ullrich, T;
- Underwood, DG;
- Upsal, I;
- Van Buren, G;
- van Nieuwenhuizen, G;
- Vasiliev, AN;
- Videbæk, F;
- Vokal, S;
- Voloshin, SA;
- Vossen, A;
- Wang, G;
- Wang, Y;
- Wang, F;
- Wang, Y;
- Webb, G;
- Webb, JC;
- Wen, L;
- Westfall, GD;
- Wieman, H;
- Wissink, SW;
- Witt, R;
- Wu, Y;
- Xiao, ZG;
- Xie, G;
- Xie, W;
- Xu, YF;
- Xu, J;
- Xu, QH;
- Xu, N;
- Xu, Z;
- Yang, S;
- Yang, Y;
- Yang, C;
- Yang, Q;
- Ye, Z;
- Ye, Z;
- Yi, L;
- Yip, K;
- Yoo, I-K;
- Yu, N;
- Zbroszczyk, H;
- Zha, W;
- Zhang, Z;
- Zhang, J;
- Zhang, S;
- Zhang, S;
- Zhang, J;
- Zhang, Y;
- Zhang, XP;
- Zhang, JB;
- Zhao, J;
- Zhong, C;
- Zhou, L;
- Zhou, C;
- Zhu, X;
- Zhu, Z;
- Zyzak, M
- et al.
Published Web Location
https://doi.org/10.1103/physrevc.97.054909Abstract
An improved measurement of the HΛ3 lifetime is presented. In this paper, the mesonic decay modes HΛ3→He3 + π- and HΛ3→d+p+π- are used to reconstruct the HΛ3 from Au+Au collision data collected by the STAR collaboration at Relativistic Heavy Ion Collider (RHIC). A minimum χ2 estimation is used to determine the lifetime of τ=142-21+24(stat.)±29(syst.) ps. This lifetime is about 50% shorter than the lifetime τ=263±2 ps of a free Λ, indicating strong hyperon-nucleon interaction in the hypernucleus system. The branching ratios of the mesonic decay channels are also determined to satisfy B.R.(He3+π-)/(B.R.(He3+π-)+B.R.(d+p+π-))=0.32±0.05(stat.)±0.08(syst.). Our ratio result favors the assignment J(HΛ3)=12 over J(HΛ3)=32. These measurements will help to constrain models of hyperon-baryon interactions.
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