Observation of an Antimatter Hypernucleus

被引：237

作者：

Abelev, B. I. ^{[1
]}

Aggarwal, M. M. ^{[2
]}

Ahammed, Z. ^{[3
]}

Alakhverdyants, A. V. ^{[4
]}

Alekseev, I. ^{[5
]}

Anderson, B. D. ^{[6
]}

Arkhipkin, D. ^{[7
]}

Averichev, G. S. ^{[4
]}

Balewski, J. ^{[8
]}

Barnby, L. S. ^{[9
]}

Baumgart, S. ^{[10
]}

Beavis, D. R. ^{[7
]}

Bellwied, R. ^{[11
]}

Betancourt, M. J. ^{[8
]}

Betts, R. R. ^{[1
]}

Bhasin, A. ^{[12
]}

Bhati, A. K. ^{[2
]}

Bichsel, H. ^{[13
]}

Bielcik, J. ^{[14
]}

Bielcikova, J. ^{[15
]}

Biritz, B. ^{[16
]}

Bland, L. C. ^{[7
]}

Bonner, B. E. ^{[17
]}

Bouchet, J. ^{[6
]}

Braidot, E. ^{[18
,19
]}

Brandin, A. V. ^{[20
]}

Bridgeman, A. ^{[21
]}

Bruna, E. ^{[10
]}

Bueltmann, S. ^{[22
]}

Bunzarov, I. ^{[4
]}

Burton, T. P. ^{[9
]}

Cai, X. Z. ^{[23
]}

Caines, H. ^{[10
]}

Calderon, M. ^{[24
]}

Catu, O. ^{[10
]}

Cebra, D. ^{[24
]}

Cendejas, R. ^{[16
]}

Cervantes, M. C. ^{[25
]}

Chajecki, Z. ^{[26
]}

Chaloupka, P. ^{[15
]}

Chattopadhyay, S. ^{[3
]}

Chen, H. F. ^{[27
]}

Chen, J. H. ^{[23
]}

Chen, J. Y. ^{[28
]}

Cheng, J. ^{[29
]}

Cherney, M. ^{[30
]}

Chikanian, A. ^{[10
]}

Choi, K. E. ^{[31
]}

Christie, W. ^{[7
]}

Chung, P. ^{[15
]}

机构：

[1] Univ Illinois, Chicago, IL 60607 USA

[2] Panjab Univ, Chandigarh 160014, India

[3] Bhabha Atom Res Ctr, Ctr Variable Energy Cyclotron, Kolkata 700064, W Bengal, India

[4] Joint Inst Nucl Res, Dubna 141980, Russia

[5] Alikhanov Inst Theoret & Expt Phys, Moscow, Russia

[6] Kent State Univ, Kent, OH 44242 USA

[7] Brookhaven Natl Lab, Upton, NY 11973 USA

[8] MIT, Cambridge, MA 02139 USA

[9] Univ Birmingham, Birmingham, W Midlands, England

[10] Yale Univ, New Haven, CT 06520 USA

[11] Wayne State Univ, Detroit, MI 48201 USA

[12] Univ Jammu, Jammu 180001, India

[13] Univ Washington, Seattle, WA 98195 USA

[14] Czech Tech Univ, Fac Nucl Sci & Phys Engn, CR-11519 Prague, Czech Republic

[15] Nucl Phys Inst AS CR, Prague 25068, Czech Republic

[16] Univ Calif Los Angeles, Los Angeles, CA 90095 USA

[17] Rice Univ, Houston, TX 77251 USA

[18] NIKHEF, Amsterdam, Netherlands

[19] Univ Utrecht, Amsterdam, Netherlands

[20] Moscow Engn Phys Inst, Moscow 115409, Russia

[21] Argonne Natl Lab, Argonne, IL 60439 USA

[22] Old Dominion Univ, Norfolk, VA 23529 USA

[23] Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China

[24] Univ Calif Davis, Davis, CA 95616 USA

[25] Texas A&M Univ, College Stn, TX 77843 USA

[26] Ohio State Univ, Columbus, OH 43210 USA

[27] Univ Sci & Technol China, Hefei 230026, Peoples R China

[28] CCNU HZNU, Inst Particle Phys, Wuhan 430079, Peoples R China

[29] Tsinghua Univ, Beijing 100084, Peoples R China

[30] Creighton Univ, Omaha, NE 68178 USA

[31] Pusan Natl Univ, Pusan, South Korea

[32] Inst Phys, Bhubaneswar 751005, Orissa, India

[33] Univ Texas Austin, Austin, TX 78712 USA

[34] Inst High Energy Phys, Protvino, Russia

[35] Univ Estadual Campinas, Sao Paulo, Brazil

[36] Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA

[37] SUBATECH, Nantes, France

[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] Warsaw Univ Technol, Warsaw, Poland

[44] Goethe Univ Frankfurt, Frankfurt, Germany

[45] CUNY City Coll, New York, NY 10031 USA

[46] Univ Sao Paulo, Sao Paulo, Brazil

[47] Indian Inst Technol, Bombay 400076, Maharashtra, India

[48] Univ Zagreb, HR-10002 Zagreb, Croatia

[49] Inst Modern Phys, Lanzhou, Peoples R China

[50] Univ Rajasthan, Jaipur 302004, Rajasthan, India

来源：

SCIENCE | 2010年 / 328卷 / 5974期

基金：

英国工程与自然科学研究理事会; 巴西圣保罗研究基金会;

关键词：

QUARK-GLUON-PLASMA; STRANGENESS; LIFETIMES; SEARCH;

D O I：

10.1126/science.1183980

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Nuclear collisions recreate conditions in the universe microseconds after the Big Bang. Only a very small fraction of the emitted fragments are light nuclei, but these states are of fundamental interest. We report the observation of antihypertritons-comprising an antiproton, an antineutron, and an antilambda hyperon-produced by colliding gold nuclei at high energy. Our analysis yields 70 +/- 17 antihypertritons (3/Lambda(H) over bar) and 157 +/- 30 hypertritons (H-3(Lambda)). The measured yields of H-3(Lambda) (3/Lambda(H) over bar) and He-3 ((3)(He) over bar) are similar, suggesting an equilibrium in coordinate and momentum space populations of up, down, and strange quarks and antiquarks, unlike the pattern observed at lower collision energies. The production and properties of antinuclei, and of nuclei containing strange quarks, have implications spanning nuclear and particle physics, astrophysics, and cosmology.

引用

页码：58 / 62

页数：5

共 40 条

[21] Fluctuations, strangeness, and quasiquarks in heavy-ion collisions from lattice QCD [J].