Antideuteron yield at the ags and coalescence implications

E864 Collaboration

doi:10.1103/PhysRevLett.85.2685

Antideuteron yield at the ags and coalescence implications

E864 Collaboration

Research output: Contribution to journal › Article › peer-review

53 Scopus citations

Abstract

We present Experiment 864's measurement of invariant antideuteron yields in 11.5A GeV/c Au + Pt collisions. The analysis includes 250 × 10⁶ triggers representing 14 × 10⁹ 10% central interactions sampled for events with high mass candidates. We find (1/2 πpt)d²N/dydp_t = 3.5 ± 1.5(stat)_−0.5^+0.9(syst) × 10⁻⁸GeV⁻²c² for 1.8 < y < 2.2, (p_t) = 0.35 GeV/c (y_c.m. = 1.6) and 3.7 ± 2.7(stat)_−1.5^+1.4(syst) × 10⁻⁸ GeV⁻²c² for 1.4 < y < 1.8, (p_t) = 0.26 GeV/c, and a coalescence parameter B₂^- of 4.1 ± 2.9(stat)_−2.4^+2.3(syst) × 10⁻³ GeV²c⁻³. Implications for coalescence and antimatter annihilation are discussed.

Original language	English
Pages (from-to)	2685-2688
Number of pages	4
Journal	Physical Review Letters
Volume	85
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.85.2685
State	Published - 2000
Externally published	Yes

Access to Document

10.1103/PhysRevLett.85.2685

Cite this

@article{bbe6ce0e4f3843da82e82f7bdddb07fe,

title = "Antideuteron yield at the ags and coalescence implications",

abstract = "We present Experiment 864's measurement of invariant antideuteron yields in 11.5A GeV/c Au + Pt collisions. The analysis includes 250 × 106 triggers representing 14 × 109 10\% central interactions sampled for events with high mass candidates. We find (1/2 πpt)d2N/dydpt = 3.5 ± 1.5(stat)−0.5+0.9(syst) × 10−8GeV−2c2 for 1.8 < y < 2.2, (pt) = 0.35 GeV/c (yc.m. = 1.6) and 3.7 ± 2.7(stat)−1.5+1.4(syst) × 10−8 GeV−2c2 for 1.4 < y < 1.8, (pt) = 0.26 GeV/c, and a coalescence parameter B2- of 4.1 ± 2.9(stat)−2.4+2.3(syst) × 10−3 GeV2c−3. Implications for coalescence and antimatter annihilation are discussed.",

author = "\{E864 Collaboration\} and Armstrong, \{T. A.\} and Barish, \{K. N.\} and S. Batsouli and Bennett, \{S. J.\} and M. Bertaina and A. Chikanian and Coe, \{S. D.\} and Cormier, \{T. M.\} and R. Davies and Dover, \{C. B.\} and P. Fachini and B. Fadem and Finch, \{L. E.\} and George, \{N. K.\} and Greene, \{S. V.\} and P. Haridas and Hill, \{J. C.\} and Hirsch, \{A. S.\} and R. Hoversten and Huang, \{H. Z.\} and H. Jaradat and Kumar, \{B. S.\} and T. Lainis and Lajoie, \{J. G.\} and Q. Li and B. Libby and Majka, \{R. D.\} and Miller, \{T. E.\} and Munhoz, \{M. G.\} and Nagle, \{J. L.\} and Pless, \{I. A.\} and Pope, \{J. K.\} and Porile, \{N. T.\} and Pruneau, \{C. A.\} and Rabin, \{M. S.Z.\} and Reid, \{J. D.\} and A. Rimai and A. Rose and Rotondo, \{F. S.\} and J. Sandweiss and Scharenberg, \{R. P.\} and Slaughter, \{A. J.\} and Smith, \{G. A.\} and Tincknell, \{M. L.\} and Toothacker, \{W. S.\} and \{Van Buren\}, G. and Wohn, \{F. K.\} and Z. Xu",

year = "2000",

doi = "10.1103/PhysRevLett.85.2685",

language = "English",

volume = "85",

pages = "2685--2688",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "13",

}

TY - JOUR

T1 - Antideuteron yield at the ags and coalescence implications

AU - E864 Collaboration

AU - Armstrong, T. A.

AU - Barish, K. N.

AU - Batsouli, S.

AU - Bennett, S. J.

AU - Bertaina, M.

AU - Chikanian, A.

AU - Coe, S. D.

AU - Cormier, T. M.

AU - Davies, R.

AU - Dover, C. B.

AU - Fachini, P.

AU - Fadem, B.

AU - Finch, L. E.

AU - George, N. K.

AU - Greene, S. V.

AU - Haridas, P.

AU - Hill, J. C.

AU - Hirsch, A. S.

AU - Hoversten, R.

AU - Huang, H. Z.

AU - Jaradat, H.

AU - Kumar, B. S.

AU - Lainis, T.

AU - Lajoie, J. G.

AU - Li, Q.

AU - Libby, B.

AU - Majka, R. D.

AU - Miller, T. E.

AU - Munhoz, M. G.

AU - Nagle, J. L.

AU - Pless, I. A.

AU - Pope, J. K.

AU - Porile, N. T.

AU - Pruneau, C. A.

AU - Rabin, M. S.Z.

AU - Reid, J. D.

AU - Rimai, A.

AU - Rose, A.

AU - Rotondo, F. S.

AU - Sandweiss, J.

AU - Scharenberg, R. P.

AU - Slaughter, A. J.

AU - Smith, G. A.

AU - Tincknell, M. L.

AU - Toothacker, W. S.

AU - Van Buren, G.

AU - Wohn, F. K.

AU - Xu, Z.

PY - 2000

Y1 - 2000

N2 - We present Experiment 864's measurement of invariant antideuteron yields in 11.5A GeV/c Au + Pt collisions. The analysis includes 250 × 106 triggers representing 14 × 109 10% central interactions sampled for events with high mass candidates. We find (1/2 πpt)d2N/dydpt = 3.5 ± 1.5(stat)−0.5+0.9(syst) × 10−8GeV−2c2 for 1.8 < y < 2.2, (pt) = 0.35 GeV/c (yc.m. = 1.6) and 3.7 ± 2.7(stat)−1.5+1.4(syst) × 10−8 GeV−2c2 for 1.4 < y < 1.8, (pt) = 0.26 GeV/c, and a coalescence parameter B2- of 4.1 ± 2.9(stat)−2.4+2.3(syst) × 10−3 GeV2c−3. Implications for coalescence and antimatter annihilation are discussed.

AB - We present Experiment 864's measurement of invariant antideuteron yields in 11.5A GeV/c Au + Pt collisions. The analysis includes 250 × 106 triggers representing 14 × 109 10% central interactions sampled for events with high mass candidates. We find (1/2 πpt)d2N/dydpt = 3.5 ± 1.5(stat)−0.5+0.9(syst) × 10−8GeV−2c2 for 1.8 < y < 2.2, (pt) = 0.35 GeV/c (yc.m. = 1.6) and 3.7 ± 2.7(stat)−1.5+1.4(syst) × 10−8 GeV−2c2 for 1.4 < y < 1.8, (pt) = 0.26 GeV/c, and a coalescence parameter B2- of 4.1 ± 2.9(stat)−2.4+2.3(syst) × 10−3 GeV2c−3. Implications for coalescence and antimatter annihilation are discussed.

UR - https://www.scopus.com/pages/publications/0034714641

U2 - 10.1103/PhysRevLett.85.2685

DO - 10.1103/PhysRevLett.85.2685

M3 - Article

AN - SCOPUS:0034714641

SN - 0031-9007

VL - 85

SP - 2685

EP - 2688

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

ER -

Antideuteron yield at the ags and coalescence implications

Abstract

Access to Document

Other files and links

Fingerprint

Cite this