Λ hyperons in 2 a GeV Ni + Cu collisions

M. Justice; S. Albergo; F. Bieser; F. P. Brady; Z. Caccia; D. A. Cebra; A. D. Chacon; J. L. Chance; Y. Choi; S. Costa; J. B. Elliott; M. L. Gilkes; J. A. Hauger; A. S. Hirsch; E. L. Hjort; A. Insolia; D. Keane; J. C. Kintner; M. A. Lisa; H. Liu; H. S. Matis; R. McGrath; M. McMahan; C. McParland; D. L. Olson; M. D. Partlan; N. T. Porile; R. Potenza; G. Rai; J. O. Rasmussen; H. G. Ritter; J. Romanski; J. L. Romero; G. V. Russo; R. P. Scharenberg; A. Scott; Y. Shao; B. K. Srivastava; T. J.M. Symons; M. Tincknell; C. Tuvè; S. Wang; P. G. Warren; D. Weerasundara; H. H. Wieman; T. Wienold; K. Wolf

doi:10.1016/S0370-2693(98)01159-9

Λ hyperons in 2 a GeV Ni + Cu collisions

M. Justice, S. Albergo, F. Bieser, F. P. Brady, Z. Caccia, D. A. Cebra, A. D. Chacon, J. L. Chance, Y. Choi, S. Costa, J. B. Elliott, M. L. Gilkes, J. A. Hauger, A. S. Hirsch, E. L. Hjort, A. Insolia, D. Keane, J. C. Kintner, M. A. Lisa, H. LiuH. S. Matis, R. McGrath, M. McMahan, C. McParland, D. L. Olson, M. D. Partlan, N. T. Porile, R. Potenza, G. Rai, J. O. Rasmussen, H. G. Ritter, J. Romanski, J. L. Romero, G. V. Russo, R. P. Scharenberg, A. Scott, Y. Shao, B. K. Srivastava, T. J.M. Symons, M. Tincknell, C. Tuvè, S. Wang, P. G. Warren, D. Weerasundara, H. H. Wieman, T. Wienold, K. Wolf

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Abstract

A sample of Λ's produced in 2 A GeV ⁵⁸Ni + ^natCu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. Low background in the invariant mass distribution allows for the unambiguous demonstration of Λ directed flow. The A m_T spectrum at mid-rapidity has the characteristic shoulder-arm shape of particles undergoing radial transverse expansion. A linear dependence of A multiplicity on impact parameter is observed, from which a total Λ + Σ^O production cross section of 112 + 24 mb is deduced. Detailed comparisons with the ARC and RVUU models are made.

Original language	English (US)
Pages (from-to)	12-19
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	440
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(98)01159-9
State	Published - Nov 12 1998

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/S0370-2693(98)01159-9

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Justice, M., Albergo, S., Bieser, F., Brady, F. P., Caccia, Z., Cebra, D. A., Chacon, A. D., Chance, J. L., Choi, Y., Costa, S., Elliott, J. B., Gilkes, M. L., Hauger, J. A., Hirsch, A. S., Hjort, E. L., Insolia, A., Keane, D., Kintner, J. C., Lisa, M. A., ... Wolf, K. (1998). Λ hyperons in 2 a GeV Ni + Cu collisions. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 440(1-2), 12-19. https://doi.org/10.1016/S0370-2693(98)01159-9

Justice, M, Albergo, S, Bieser, F, Brady, FP, Caccia, Z, Cebra, DA, Chacon, AD, Chance, JL, Choi, Y, Costa, S, Elliott, JB, Gilkes, ML, Hauger, JA, Hirsch, AS, Hjort, EL, Insolia, A, Keane, D, Kintner, JC, Lisa, MA, Liu, H, Matis, HS, McGrath, R, McMahan, M, McParland, C, Olson, DL, Partlan, MD, Porile, NT, Potenza, R, Rai, G, Rasmussen, JO, Ritter, HG, Romanski, J, Romero, JL, Russo, GV, Scharenberg, RP, Scott, A, Shao, Y, Srivastava, BK, Symons, TJM, Tincknell, M, Tuvè, C, Wang, S, Warren, PG, Weerasundara, D, Wieman, HH, Wienold, T & Wolf, K 1998, 'Λ hyperons in 2 a GeV Ni + Cu collisions', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 440, no. 1-2, pp. 12-19. https://doi.org/10.1016/S0370-2693(98)01159-9

@article{d5b28b9572fc43e79f86b7172c33bdb9,

title = "Λ hyperons in 2 a GeV Ni + Cu collisions",

abstract = "A sample of Λ's produced in 2 A GeV 58Ni + natCu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. Low background in the invariant mass distribution allows for the unambiguous demonstration of Λ directed flow. The A mT spectrum at mid-rapidity has the characteristic shoulder-arm shape of particles undergoing radial transverse expansion. A linear dependence of A multiplicity on impact parameter is observed, from which a total Λ + ΣO production cross section of 112 + 24 mb is deduced. Detailed comparisons with the ARC and RVUU models are made.",

author = "M. Justice and S. Albergo and F. Bieser and Brady, {F. P.} and Z. Caccia and Cebra, {D. A.} and Chacon, {A. D.} and Chance, {J. L.} and Y. Choi and S. Costa and Elliott, {J. B.} and Gilkes, {M. L.} and Hauger, {J. A.} and Hirsch, {A. S.} and Hjort, {E. L.} and A. Insolia and D. Keane and Kintner, {J. C.} and Lisa, {M. A.} and H. Liu and Matis, {H. S.} and R. McGrath and M. McMahan and C. McParland and Olson, {D. L.} and Partlan, {M. D.} and Porile, {N. T.} and R. Potenza and G. Rai and Rasmussen, {J. O.} and Ritter, {H. G.} and J. Romanski and Romero, {J. L.} and Russo, {G. V.} and Scharenberg, {R. P.} and A. Scott and Y. Shao and Srivastava, {B. K.} and Symons, {T. J.M.} and M. Tincknell and C. Tuv{\`e} and S. Wang and Warren, {P. G.} and D. Weerasundara and Wieman, {H. H.} and T. Wienold and K. Wolf",

note = "Funding Information: The authors would like to thank David Kahana for providing the ARC events. This work is supported in part by the US Department of Energy under contracts/grants DE-AC03-76SF00098, DE-FG02-89ER40531, DE-FG02-88ER40408, DE-FG02-88ER40412, DE-FG05-88ER40437, and by the US National Science Foundation under grant PHY-9123301.",

year = "1998",

month = nov,

day = "12",

doi = "10.1016/S0370-2693(98)01159-9",

language = "English (US)",

volume = "440",

pages = "12--19",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier",

number = "1-2",

}

TY - JOUR

T1 - Λ hyperons in 2 a GeV Ni + Cu collisions

AU - Justice, M.

AU - Albergo, S.

AU - Bieser, F.

AU - Brady, F. P.

AU - Caccia, Z.

AU - Cebra, D. A.

AU - Chacon, A. D.

AU - Chance, J. L.

AU - Choi, Y.

AU - Costa, S.

AU - Elliott, J. B.

AU - Gilkes, M. L.

AU - Hauger, J. A.

AU - Hirsch, A. S.

AU - Hjort, E. L.

AU - Insolia, A.

AU - Keane, D.

AU - Kintner, J. C.

AU - Lisa, M. A.

AU - Liu, H.

AU - Matis, H. S.

AU - McGrath, R.

AU - McMahan, M.

AU - McParland, C.

AU - Olson, D. L.

AU - Partlan, M. D.

AU - Porile, N. T.

AU - Potenza, R.

AU - Rai, G.

AU - Rasmussen, J. O.

AU - Ritter, H. G.

AU - Romanski, J.

AU - Romero, J. L.

AU - Russo, G. V.

AU - Scharenberg, R. P.

AU - Scott, A.

AU - Shao, Y.

AU - Srivastava, B. K.

AU - Symons, T. J.M.

AU - Tincknell, M.

AU - Tuvè, C.

AU - Wang, S.

AU - Warren, P. G.

AU - Weerasundara, D.

AU - Wieman, H. H.

AU - Wienold, T.

AU - Wolf, K.

N1 - Funding Information: The authors would like to thank David Kahana for providing the ARC events. This work is supported in part by the US Department of Energy under contracts/grants DE-AC03-76SF00098, DE-FG02-89ER40531, DE-FG02-88ER40408, DE-FG02-88ER40412, DE-FG05-88ER40437, and by the US National Science Foundation under grant PHY-9123301.

PY - 1998/11/12

Y1 - 1998/11/12

N2 - A sample of Λ's produced in 2 A GeV 58Ni + natCu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. Low background in the invariant mass distribution allows for the unambiguous demonstration of Λ directed flow. The A mT spectrum at mid-rapidity has the characteristic shoulder-arm shape of particles undergoing radial transverse expansion. A linear dependence of A multiplicity on impact parameter is observed, from which a total Λ + ΣO production cross section of 112 + 24 mb is deduced. Detailed comparisons with the ARC and RVUU models are made.

AB - A sample of Λ's produced in 2 A GeV 58Ni + natCu collisions has been obtained with the EOS Time Projection Chamber at the Bevalac. Low background in the invariant mass distribution allows for the unambiguous demonstration of Λ directed flow. The A mT spectrum at mid-rapidity has the characteristic shoulder-arm shape of particles undergoing radial transverse expansion. A linear dependence of A multiplicity on impact parameter is observed, from which a total Λ + ΣO production cross section of 112 + 24 mb is deduced. Detailed comparisons with the ARC and RVUU models are made.

UR - http://www.scopus.com/inward/record.url?scp=0346939162&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0346939162&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(98)01159-9

DO - 10.1016/S0370-2693(98)01159-9

M3 - Article

AN - SCOPUS:0346939162

SN - 0370-2693

VL - 440

SP - 12

EP - 19

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1-2

ER -

Λ hyperons in 2 a GeV Ni + Cu collisions

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