Advanced search
Start date
Betweenand
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Observation of the antimatter helium-4 nucleus

Full text
Author(s):
Show less -
Agakishiev, H. [1] ; Aggarwal, M. M. [2] ; Ahammed, Z. [3] ; Alakhverdyants, A. V. [1] ; Alekseev, I. [4] ; Alford, J. [5] ; Anderson, B. D. [5] ; Anson, C. D. [6] ; Arkhipkin, D. [7] ; Averichev, G. S. [1] ; Balewski, J. [8] ; Beavis, D. R. [7] ; Behera, N. K. [9] ; Bellwied, R. [10] ; Betancourt, M. J. [8] ; Betts, R. R. [11] ; Bhasin, A. [12, 13, 14] ; Bhati, A. K. [2] ; Bichsel, H. [15] ; Bielcik, J. [16] ; Bielcikova, J. [17] ; Biritz, B. [18] ; Bland, L. C. [7] ; Bordyuzhin, I. G. [4] ; Borowski, W. [19] ; Bouchet, J. [5] ; Braidot, E. [20, 21] ; Brandin, A. V. [22] ; Bridgeman, A. [23] ; Brovko, S. G. [24] ; Bruna, E. [25] ; Bueltmann, S. [26] ; Bunzarov, I. [1] ; Burton, T. P. [7] ; Cai, X. Z. [27] ; Caines, H. [25] ; Calderon, M. [24] ; Cebra, D. [24] ; Cendejas, R. [18] ; Cervantes, M. C. [12] ; Chajecki, Z. [6] ; Chaloupka, P. [17] ; Chattopadhyay, S. [14] ; Chen, H. F. [28] ; Chen, J. H. [27] ; Chen, J. Y. [29] ; Chen, L. [29] ; Cheng, J. [30] ; Cherney, M. [31] ; Chikanian, A. [25] ; Choi, K. E. [32] ; Christie, W. [7] ; Chung, P. [17] ; Codrington, M. J. M. [12] ; Corliss, R. [8] ; Cramer, J. G. [15] ; Crawford, H. J. ; Leyva, A. Davila [33] ; De Silva, L. C. [10] ; Debbe, R. R. [7] ; Dedovich, T. G. [1] ; Derevschikov, A. A. [34] ; Derradi de Souza, R. [35] ; Didenko, L. [7] ; Djawotho, P. [12] ; Dogra, S. M. [13] ; Dong, X. [3] ; Drachenberg, J. L. [12] ; Draper, J. E. [24] ; Dunlop, C. [7] ; Efimov, L. G. [1] ; Elnimr, M. [36] ; Engelage, J. ; Eppley, G. [37] ; Estienne, M. [19] ; Eun, L. [38] ; Evdokimov, O. [11] ; Fatemi, R. [39] ; Fedorisin, J. [1] ; Fersch, R. G. [39] ; Filip, P. [1] ; Finch, E. [25] ; Fine, V. [7] ; Fisyak, Y. [7] ; Gagliardi, C. A. [12] ; Gangadharan, D. R. [18] ; Geurts, F. [37] ; Ghosh, P. [14] ; Gorbunov, Y. N. [31] ; Gordon, A. [7] ; Grebenyuk, O. G. [3] ; Grosnick, D. [40] ; Guertin, S. M. [18] ; Gupta, A. [13] ; Gupta, S. [13] ; Guryn, W. [7] ; Haag, B. [24] ; Hajkova, O. [16] ; Hamed, A. [12] ; Han, L-X. [27] ; Harris, J. W. [25] ; Hays-Wehle, J. P. [8] ; Heinz, M. [25] ; Heppelmann, S. [38] ; Hirsch, A. [41] ; Hjort, E. [3] ; Hoffmann, G. W. [33] ; Hofman, D. J. [11] ; Huang, B. [28] ; Huang, H. Z. [18] ; Humanic, T. J. [6] ; Huo, L. [12] ; Igo, G. [18] ; Jacobs, P. [3] ; Jacobs, W. [42] ; Jena, C. [43] ; Jin, F. [27] ; Joseph, J. [5] ; Judd, E. G. ; Kabana, S. [19] ; Kang, K. [30] ; Kapitan, J. [17] ; Kauder, K. [11] ; Ke, H. W. [29] ; Keane, D. [5] ; Kechechyan, A. [1] ; Kettler, D. [15] ; Kikola, D. P. [41] ; Kiryluk, J. [3] ; Kisiel, A. [44] ; Kizka, V. [1] ; Klein, S. R. [3] ; Knospe, A. G. [25] ; Koetke, D. D. [40] ; Kollegger, T. [45] ; Konzer, J. [41] ; Koralt, I. [26] ; Koroleva, L. [4] ; Korsch, W. [39] ; Kotchenda, L. [22] ; Kouchpil, V. [17] ; Kravtsov, P. [22] ; Krueger, K. [23] ; Krus, M. [16] ; Kumar, L. [5] ; Kurnadi, P. [18] ; Lamont, M. A. C. [7] ; Landgraf, J. M. [7] ; LaPointe, S. [36] ; Lauret, J. [7] ; Lebedev, A. [7] ; Lednicky, R. [1] ; Lee, J. H. [7] ; Leight, W. [8] ; LeVine, M. J. [7] ; Li, C. [28] ; Li, L. [33] ; Li, N. [29] ; Li, W. [27] ; Li, X. [41, 46] ; Li, Y. [30] ; Li, Z. M. [29] ; Lisa, M. A. [6] ; Liu, F. [29] ; Liu, H. [24] ; Liu, J. ; Ljubicic, T. [7] ; Llope, W. J. [37] ; Longacre, R. S. [7] ; Love, W. A. [7] ; Lu, Y. [28] ; Lukashov, E. V. [22] ; Luo, X. [28] ; Ma, G. L. [27] ; Ma, Y. G. [27] ; Mahapatra, D. P. [43] ; Majka, R. [25] ; Mall, O. I. [24] ; Manweiler, R. [40] ; Margetis, S. [5] ; Markert, C. [33] ; Masui, H. [3] ; Matis, H. S. [3] ; Matulenko, Yu A. [34] ; McDonald, D. [37] ; McShane, T. S. [31] ; Meschanin, A. [34] ; Milner, R. [8] ; Minaev, N. G. [34] ; Mioduszewski, S. [12] ; Mitrovski, M. K. [7] ; Mohammed, Y. [12] ; Mohanty, B. [14] ; Mondal, M. M. [14] ; Morozov, B. [4] ; Morozov, D. A. [34] ; Munhoz, M. G. [47] ; Mustafa, M. K. [41] ; Naglis, M. [3] ; Nandi, B. K. [9] ; Nayak, T. K. [14] ; Netrakanti, P. K. [41] ; Nogach, L. V. [34] ; Nurushev, S. B. [34] ; Odyniec, G. [3] ; Ogawa, A. [7] ; Oh, K. [32] ; Ohlson, A. [25] ; Okorokov, V. [22] ; Oldag, E. W. [33] ; Olson, D. [3] ; Pachr, M. [16] ; Page, B. S. [42] ; Pal, S. K. [12] ; Pandit, Y. [5] ; Panebratsev, Y. [1] ; Pawlak, T. [44] ; Pei, H. [11] ; Peitzmann, T. [20, 21] ; Perkins, C. ; Peryt, W. [44] ; Pile, P. [7] ; Planinic, M. [48] ; Ploskon, M. A. [3] ; Pluta, J. [44] ; Plyku, D. [26] ; Poljak, N. [48] ; Porter, J. [3] ; Poskanzer, A. M. [3] ; Potukuchi, B. V. K. S. [13] ; Powell, C. B. [3] ; Prindle, D. [15] ; Pruneau, C. [36] ; K. Pruthi, N. [2] ; Pujahari, P. R. [9] ; Putschke, J. [25] ; Qiu, H. [49] ; Raniwala, R. [50] ; Raniwala, S. [50] ; Ray, R. L. [33] ; Redwine, R. [8] ; Reed, R. [24] ; Ritter, H. G. [3] ; Roberts, J. B. [37] ; Rogachevskiy, O. V. [1] ; Romero, J. L. [24] ; Ruan, L. [7] ; Rusnak, J. [17] ; Sahoo, N. R. [14] ; Sakrejda, I. [3] ; Salur, S. [24] ; Sandweiss, J. [25] ; Sangaline, E. [24] ; Sarkar, A. [9] ; Schambach, J. [33] ; Scharenberg, R. P. [41] ; Schmah, A. M. [3] ; Schmitz, N. [51] ; Schuster, T. R. [45] ; Seele, J. [8] ; Seger, J. [31] ; Selyuzhenkov, I. [42] ; Seyboth, P. [51] ; Shah, N. [18] ; Shahaliev, E. [1] ; Shao, M. [28] ; Sharma, M. [36] ; Shi, S. S. [29] ; Shou, Q. Y. [27] ; Sichtermann, E. P. [3] ; Simon, F. [51] ; Singaraju, R. N. [14] ; Skoby, M. J. [41] ; Smirnov, N. [25] ; Solanki, D. [50] ; Sorensen, P. [7] ; Spinka, H. M. [23] ; Srivastava, B. [41] ; Stanislaus, T. D. S. [40] ; Staszak, D. [18] ; Steadman, S. G. [8] ; Stevens, J. R. [42] ; Stock, R. [45] ; Strikhanov, M. [22] ; Stringfellow, B. [41] ; Suaide, A. A. P. [47] ; Suarez, M. C. [11] ; Subba, N. L. [5] ; Sumbera, M. [17] ; Sun, X. M. [3] ; Sun, Y. [28] ; Sun, Z. [49] ; Surrow, B. [8] ; Svirida, D. N. [4] ; Symons, T. J. M. [3] ; Szanto de Toledo, A. [47] ; Takahashi, J. [35] ; Tang, A. H. [7] ; Tang, Z. [28] ; Tarini, L. H. [36] ; Tarnowsky, T. [52] ; Thein, D. [33] ; Thomas, J. H. [3] ; Tian, J. [27] ; Timmins, A. R. [10] ; Tlusty, D. [17] ; Tokarev, M. [1] ; Trainor, T. A. [15] ; Trentalange, S. [18] ; Tribble, R. E. [12] ; Tribedy, P. [14] ; Tsai, O. D. [18] ; Ullrich, T. [7] ; Underwood, D. G. [23] ; Van Buren, G. [7] ; van Nieuwenhuizen, G. [8] ; Vanfossen, Jr., J. A. [5] ; Varma, R. [9] ; Vasconcelos, G. M. S. [35] ; Vasiliev, A. N. [34] ; Videbaek, F. [7] ; Viyogi, Y. P. [14] ; Vokal, S. [1] ; Voloshin, S. A. [36] ; Wada, M. [33] ; Walker, M. [8] ; Wang, F. [41] ; Wang, G. [18] ; Wang, H. [52] ; Wang, J. S. [49] ; Wang, Q. [41] ; Wang, X. L. [28] ; Wang, Y. [30] ; Webb, G. [39] ; Webb, J. C. [7] ; Westfall, G. D. [52] ; Whitten, Jr., C. [18] ; Wieman, H. [3] ; Wissink, S. W. [42] ; Witt, R. [53] ; Witzke, W. [39] ; Wu, Y. F. [29] ; Xiao, Z. [30] ; Xie, W. [41] ; Xu, H. [49] ; Xu, N. [29] ; Xu, Q. H. [46] ; Xu, W. [18] ; Xu, Y. [28] ; Xu, Z. [7] ; Xue, L. [27] ; Yang, Y. [29, 49] ; Yepes, P. [37] ; Yip, K. [7] ; Yoo, I-K. [32] ; Zawisza, M. [44] ; Zbroszczyk, H. [44] ; Zhan, W. [49] ; Zhang, J. B. [29] ; Zhang, S. [27] ; Zhang, W. M. [5] ; Zhang, X. P. [30] ; Zhang, Y. [3] ; Zhang, Z. P. [28] ; Zhao, F. [18] ; Zhao, J. [27] ; Zhong, C. [27] ; Zhou, W. [45] ; Zhu, X. [30] ; Zhu, Y. H. [27] ; Zoulkarneev, R. [1] ; Zoulkarneeva, Y. [1] ; Collaboration, STAR
Total Authors: 373
Affiliation:
Show less -
[1] Joint Inst Nucl Res, Dubna 141980 - Russia
[2] Panjab Univ, Chandigarh 160014 - India
[3] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 - USA
[4] Alikhanov Inst Theoret & Expt Phys, Moscow 117218 - Russia
[5] Kent State Univ, Kent, OH 44242 - USA
[6] Ohio State Univ, Columbus, OH 43210 - USA
[7] Brookhaven Natl Lab, Upton, NY 11973 - USA
[8] MIT, Cambridge, MA 02139 - USA
[9] Indian Inst Technol, Bombay 400076, Maharashtra - India
[10] Univ Houston, Houston, TX 77204 - USA
[11] Univ Illinois, Chicago, IL 60607 - USA
[12] Texas A&M Univ, College Stn, TX 77843 - USA
[13] Univ Jammu, Jammu 180001 - India
[14] Variable Energy Cyclotron Ctr, Kolkata 700064 - India
[15] Univ Washington, Seattle, WA 98195 - USA
[16] Czech Tech Univ, FNSPE, Prague 11519 - Czech Republic
[17] Nucl Phys Inst AS CR, Rez 25068 - Czech Republic
[18] Univ Calif Los Angeles, Los Angeles, CA 90095 - USA
[19] SUBATECH, F-44307 Nantes - France
[20] NIKHEF, NL-1098 XG Amsterdam - Netherlands
[21] Univ Utrecht, NL-1098 XG Amsterdam - Netherlands
[22] Moscow Engn Phys Inst, Moscow 115409 - Russia
[23] Argonne Natl Lab, Argonne, IL 60439 - USA
[24] Univ Calif Davis, Davis, CA 95616 - USA
[25] Yale Univ, New Haven, CT 06520 - USA
[26] Old Dominion Univ, Norfolk, VA 23529 - USA
[27] Shanghai Inst Appl Phys, Shanghai 201800 - Peoples R China
[28] Univ Sci & Technol China, Hefei 230026 - Peoples R China
[29] CCNU HZNU, Inst Particle Phys, Wuhan 430079 - Peoples R China
[30] Tsinghua Univ, Beijing 100084 - Peoples R China
[31] Creighton Univ, Omaha, NE 68178 - USA
[32] Pusan Natl Univ, Pusan 609735 - South Korea
[33] Univ Texas Austin, Austin, TX 78712 - USA
[34] Inst High Energy Phys, Protvino 142281 - Russia
[35] Univ Estadual Campinas, BR-13083859 Sao Paulo - Brazil
[36] Wayne State Univ, Detroit, MI 48201 - USA
[37] Rice Univ, Houston, TX 77251 - USA
[38] Penn State Univ, University Pk, PA 16802 - USA
[39] Univ Kentucky, Lexington, KY 40506 - USA
[40] Valparaiso Univ, Valparaiso, IN 46383 - USA
[41] Purdue Univ, W Lafayette, IN 47907 - USA
[42] Indiana Univ, Bloomington, IN 47408 - USA
[43] Inst Phys, Bhubaneswar 751005, Orissa - India
[44] Warsaw Univ Technol, PL-00661 Warsaw - Poland
[45] Goethe Univ Frankfurt, D-60325 Frankfurt - Germany
[46] Shandong Univ, Jinan 250100, Shandong - Peoples R China
[47] Univ Sao Paulo, BR-05508090 Sao Paulo - Brazil
[48] Univ Zagreb, HR-10002 Zagreb - Croatia
[49] Inst Modern Phys, Lanzhou 730000 - Peoples R China
[50] Univ Rajasthan, Jaipur 302004, Rajasthan - India
[51] Max Planck Inst Phys & Astrophys, D-80805 Munich - Germany
[52] Michigan State Univ, E Lansing, MI 48824 - USA
[53] USN Acad, Annapolis, MD 21402 - USA
Total Affiliations: 53
Document type: Journal article
Source: Nature; v. 473, n. 7347, p. 353-356, May 2011.
Field of knowledge: Physical Sciences and Mathematics - Physics
Web of Science Citations: 77
Abstract

High-energy nuclear collisions create an energy density similar to that of the Universe microseconds after the Big Bang; in both cases, matter and antimatter are formed with comparable abundance. However, the relatively short-lived expansion in nuclear collisions allows antimatter to decouple quickly from matter, and avoid annihilation. Thus, a high-energy accelerator of heavy nuclei provides an efficient means of producing and studying antimatter. The antimatter helium-4 nucleus (), also known as the anti-α (), consists of two antiprotons and two antineutrons (baryon number B = −4). It has not been observed previously, although the α-particle was identified a century ago by Rutherford and is present in cosmic radiation at the ten per cent level. Antimatter nuclei with B < −1 have been observed only as rare products of interactions at particle accelerators, where the rate of antinucleus production in high-energy collisions decreases by a factor of about 1,000 with each additional antinucleon. Here we report the observation of , the heaviest observed antinucleus to date. In total, 18 counts were detected at the STAR experiment at the Relativistic Heavy Ion Collider (RHIC; ref. 6) in 10<sup>9</sup> recorded gold-on-gold (Au+Au) collisions at centre-of-mass energies of 200 GeV and 62 GeV per nucleon-nucleon pair. The yield is consistent with expectations from thermodynamic and coalescent nucleosynthesis models, providing an indication of the production rate of even heavier antimatter nuclei and a benchmark for possible future observations of in cosmic radiation. (AU)

FAPESP's process: 11/03164-9 - Investigation of the quark gluon plasma at RHIC and LHC
Grantee:Alexandre Alarcon Do Passo Suaide
Support type: Regular Research Grants
FAPESP's process: 05/55625-9 - Nuclear reactions in relativistic and astrophysical regimes
Grantee:Alejandro Szanto de Toledo
Support type: Research Projects - Thematic Grants