Antideuteron yield at the AGS and coalescence implications

被引：49
作者：
Armstrong, TA
Barish, KN
Batsouli, S
Bennett, SJ
Bertaina, M
Chikanian, A
Coe, SD
Cormier, TM
Davies, R
Dover, CB
Fachini, P
Fadem, B
Finch, LE
George, NK
Greene, SV
Haridas, P
Hill, JC
Hirsch, AS
Hoversten, R
Huang, HZ
Jaradat, H
Kumar, BS
Lainis, T
Lajoie, JG
Li, Q
Libby, B
Majka, RD
Miller, TE
Munhoz, MG
Nagle, JL
Pless, IA
Pope, JK
Porile, NT
Pruneau, CA
Rabin, MSZ
Reid, JD
Rimai, A
Rose, A
Rotondo, FS
Sandweiss, J
Scharenberg, RP
Slaughter, AJ
Smith, GA
Tincknell, ML
Toothacker, WS
Van Buren, G
Wohn, FK
Xu, Z
机构：
[1] Penn State Univ, University Pk, PA 16802 USA
[2] Brookhaven Natl Lab, Upton, NY 11973 USA
[3] Univ Calif Los Angeles, Los Angeles, CA 90095 USA
[4] Univ Calif Riverside, Riverside, CA 92521 USA
[5] Columbia Univ, Nevis Lab, Irvington, NY 10533 USA
[6] Iowa State Univ, Ames, IA 50011 USA
[7] Univ Massachusetts, Amherst, MA 01003 USA
[8] MIT, Cambridge, MA 02139 USA
[9] Purdue Univ, W Lafayette, IN 47907 USA
[10] US Mil Acad, West Point, NY 10996 USA
[11] Vanderbilt Univ, Nashville, TN 37235 USA
[12] Wayne State Univ, Detroit, MI 48201 USA
[13] Yale Univ, New Haven, CT 06520 USA
来源：
PHYSICAL REVIEW LETTERS | 2000年 / 85卷 / 13期
关键词：
D O I：
10.1103/PhysRevLett.85.2685
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
dWe present Experiment 864's measurement of invariant antideuteron yields in 11.5A GeV/c Au + Pt collisions. The analysis includes 250 X 10(6) triggers representing 14 X 10(9) 10% central interactions sampled for events with high mass candidates. We find (1/2 pi p(t))d(2)N/dyd(Pt) = 3.5 +/- 1.5(stat)(-0.5)(+0.9) (syst) X 10(-8) GeV-2 c(2) for 1.8 < y < 2.2, [p(t)] = 0.35 GeV/e (y(c.m.) = 1.6) and 3.7 +/- 2.7(stat)(-1.5)(+1.4)(syst) X 10(-8) GeV-2 c(2) for 1.4 < y < 1.8, [p(t)] = 0.26 GeV/c, and a coalescence parameter (B) over bar(2) of 4.1 +/- 2.9(stat)(-2.4)(+2.3)(syst) X 10(-3) CeV(2)c(-3). Implications for coalescence and antimatter annihilation are discussed.
引用
收藏
页码：2685 / 2688
页数：4
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