A search for narrow states in antineutron-proton total and annihilation cross sections near N̄N threshold

T. Armstrong; C. Chu; J. Clement; C. Elinon; M. Furic; K. Hartman; A. Hicks; E. Hungerford; T. Kishimoto; J. Kruk; R. Lewis; D. Lowenstein; W. Lochstet; B. Mayes; B. Moss; G. Mutchler; L. Pinsky; G. A. Smith; L. Tang; W. von Witsch; Y. Xue

doi:10.1016/0370-2693(86)90874-9

A search for narrow states in antineutron-proton total and annihilation cross sections near N̄N threshold

T. Armstrong, C. Chu, J. Clement, C. Elinon, M. Furic, K. Hartman, A. Hicks, E. Hungerford, T. Kishimoto, J. Kruk, R. Lewis, D. Lowenstein, W. Lochstet, B. Mayes, B. Moss, G. Mutchler, L. Pinsky, G. A. Smith, L. Tang, W. von WitschY. Xue

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Abstract

The n̄p total and annihilation cross section have been measured from near N̄N threshold (1880 MeV) to 1940 MeV with RMS resolution ranging from 0.08 MeV (1880 MeV) to 6.7 MeV (1940 MeV). No significant narrow meson structures were seen, with 90% CL upper limits of 40-180 mb-MeV on σΓ for states with width less than our resolution. Combined with increasing unitarity bounds on σ as one approaches threshold, these limits confine widths of possible predicted states below 1900 MeV to less than ∼ 1 MeV.

Original language	English
Pages (from-to)	383-386
Number of pages	4
Journal	Physics Letters B
Volume	175
Issue number	3
DOIs	https://doi.org/10.1016/0370-2693(86)90874-9
Publication status	Published - 1986 Aug 7

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1016/0370-2693(86)90874-9

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Armstrong, T., Chu, C., Clement, J., Elinon, C., Furic, M., Hartman, K., Hicks, A., Hungerford, E., Kishimoto, T., Kruk, J., Lewis, R., Lowenstein, D., Lochstet, W., Mayes, B., Moss, B., Mutchler, G., Pinsky, L., Smith, G. A., Tang, L., ... Xue, Y. (1986). A search for narrow states in antineutron-proton total and annihilation cross sections near N̄N threshold. Physics Letters B, 175(3), 383-386. https://doi.org/10.1016/0370-2693(86)90874-9

@article{7721fe10fa824ca5882b515c42b052b2,

title = "A search for narrow states in antineutron-proton total and annihilation cross sections near {\=N}N threshold",

abstract = "The {\=n}p total and annihilation cross section have been measured from near {\=N}N threshold (1880 MeV) to 1940 MeV with RMS resolution ranging from 0.08 MeV (1880 MeV) to 6.7 MeV (1940 MeV). No significant narrow meson structures were seen, with 90% CL upper limits of 40-180 mb-MeV on σΓ for states with width less than our resolution. Combined with increasing unitarity bounds on σ as one approaches threshold, these limits confine widths of possible predicted states below 1900 MeV to less than ∼ 1 MeV.",

author = "T. Armstrong and C. Chu and J. Clement and C. Elinon and M. Furic and K. Hartman and A. Hicks and E. Hungerford and T. Kishimoto and J. Kruk and R. Lewis and D. Lowenstein and W. Lochstet and B. Mayes and B. Moss and G. Mutchler and L. Pinsky and Smith, {G. A.} and L. Tang and {von Witsch}, W. and Y. Xue",

note = "Funding Information: Work supposed by ~,he US Depa~ment of Energy. 2 Work supposed in part by the US Depa~ment of Energy, Work supported in part by the US Nadona! Science Foundation.",

year = "1986",

month = aug,

day = "7",

doi = "10.1016/0370-2693(86)90874-9",

language = "English",

volume = "175",

pages = "383--386",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "3",

}

Armstrong, T, Chu, C, Clement, J, Elinon, C, Furic, M, Hartman, K, Hicks, A, Hungerford, E, Kishimoto, T, Kruk, J, Lewis, R, Lowenstein, D, Lochstet, W, Mayes, B, Moss, B, Mutchler, G, Pinsky, L, Smith, GA, Tang, L, von Witsch, W & Xue, Y 1986, 'A search for narrow states in antineutron-proton total and annihilation cross sections near N̄N threshold', Physics Letters B, vol. 175, no. 3, pp. 383-386. https://doi.org/10.1016/0370-2693(86)90874-9

TY - JOUR

T1 - A search for narrow states in antineutron-proton total and annihilation cross sections near N̄N threshold

AU - Armstrong, T.

AU - Chu, C.

AU - Clement, J.

AU - Elinon, C.

AU - Furic, M.

AU - Hartman, K.

AU - Hicks, A.

AU - Hungerford, E.

AU - Kishimoto, T.

AU - Kruk, J.

AU - Lewis, R.

AU - Lowenstein, D.

AU - Lochstet, W.

AU - Mayes, B.

AU - Moss, B.

AU - Mutchler, G.

AU - Pinsky, L.

AU - Smith, G. A.

AU - Tang, L.

AU - von Witsch, W.

AU - Xue, Y.

N1 - Funding Information: Work supposed by ~,he US Depa~ment of Energy. 2 Work supposed in part by the US Depa~ment of Energy, Work supported in part by the US Nadona! Science Foundation.

PY - 1986/8/7

Y1 - 1986/8/7

N2 - The n̄p total and annihilation cross section have been measured from near N̄N threshold (1880 MeV) to 1940 MeV with RMS resolution ranging from 0.08 MeV (1880 MeV) to 6.7 MeV (1940 MeV). No significant narrow meson structures were seen, with 90% CL upper limits of 40-180 mb-MeV on σΓ for states with width less than our resolution. Combined with increasing unitarity bounds on σ as one approaches threshold, these limits confine widths of possible predicted states below 1900 MeV to less than ∼ 1 MeV.

AB - The n̄p total and annihilation cross section have been measured from near N̄N threshold (1880 MeV) to 1940 MeV with RMS resolution ranging from 0.08 MeV (1880 MeV) to 6.7 MeV (1940 MeV). No significant narrow meson structures were seen, with 90% CL upper limits of 40-180 mb-MeV on σΓ for states with width less than our resolution. Combined with increasing unitarity bounds on σ as one approaches threshold, these limits confine widths of possible predicted states below 1900 MeV to less than ∼ 1 MeV.

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U2 - 10.1016/0370-2693(86)90874-9

DO - 10.1016/0370-2693(86)90874-9

M3 - Article

AN - SCOPUS:0042791676

SN - 0370-2693

VL - 175

SP - 383

EP - 386

JO - Physics Letters B

JF - Physics Letters B

IS - 3

ER -

A search for narrow states in antineutron-proton total and annihilation cross sections near N̄N threshold

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