Search for narrow peaks in inclusive π0 spectra from pp annihilation at rest

M. Chiba; K. Doi; T. Fujitani; J. Iwahori; M. Kawaguti; M. Kobayashi; M. Koike; T. Kozuki; S. Kurokawa; H. Kusumoto; H. Nagano; Y. Nagashima; T. Omori; S. Sugimoto; M. Takasaki; F. Takeutchi; M. Tsuchiya; M. Ueda; Y. Yamaguchi; H. Yoshida

doi:10.1016/0370-2693(88)90501-1

Search for narrow peaks in inclusive π⁰ spectra from pp annihilation at rest

M. Chiba, K. Doi, T. Fujitani, J. Iwahori, M. Kawaguti, M. Kobayashi, M. Koike, T. Kozuki, S. Kurokawa, H. Kusumoto, H. Nagano, Y. Nagashima, T. Omori, S. Sugimoto, M. Takasaki, F. Takeutchi, M. Tsuchiya, M. Ueda, Y. Yamaguchi, H. Yoshida

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Abstract

By using modularized NaI(Tl) detectors, we carried out a high statistics measurement of inclusive π⁰ spectra from pp annihilation at rest. We did not observe any narrow π⁰ peaks arising from baryonium production, pp→π⁰B. The σ upper limit of the yield varied between 10^-2 and 10^-4 depending on the mass and oncharge multiplicity. Three narrow peaks at 2 σ levels were seen at approximately the same masses as in the previous measurement of pp→ γB.We also derived the yield of pp annihilation into π⁰M forM = ø, η′, ω, ρ{variant}⁰, η and π⁰.

Original language	English
Pages (from-to)	447-452
Number of pages	6
Journal	Physics Letters B
Volume	202
Issue number	3
DOIs	https://doi.org/10.1016/0370-2693(88)90501-1
Publication status	Published - 1988 Mar 10
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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Chiba, M., Doi, K., Fujitani, T., Iwahori, J., Kawaguti, M., Kobayashi, M., Koike, M., Kozuki, T., Kurokawa, S., Kusumoto, H., Nagano, H., Nagashima, Y., Omori, T., Sugimoto, S., Takasaki, M., Takeutchi, F., Tsuchiya, M., Ueda, M., Yamaguchi, Y., & Yoshida, H. (1988). Search for narrow peaks in inclusive π⁰ spectra from pp annihilation at rest. Physics Letters B, 202(3), 447-452. https://doi.org/10.1016/0370-2693(88)90501-1

Chiba, M, Doi, K, Fujitani, T, Iwahori, J, Kawaguti, M, Kobayashi, M, Koike, M, Kozuki, T, Kurokawa, S, Kusumoto, H, Nagano, H, Nagashima, Y, Omori, T, Sugimoto, S, Takasaki, M, Takeutchi, F, Tsuchiya, M, Ueda, M, Yamaguchi, Y & Yoshida, H 1988, 'Search for narrow peaks in inclusive π⁰ spectra from pp annihilation at rest', Physics Letters B, vol. 202, no. 3, pp. 447-452. https://doi.org/10.1016/0370-2693(88)90501-1

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title = "Search for narrow peaks in inclusive π0 spectra from pp annihilation at rest",

abstract = "By using modularized NaI(Tl) detectors, we carried out a high statistics measurement of inclusive π0 spectra from pp annihilation at rest. We did not observe any narrow π0 peaks arising from baryonium production, pp→π0B. The σ upper limit of the yield varied between 10-2 and 10-4 depending on the mass and oncharge multiplicity. Three narrow peaks at 2 σ levels were seen at approximately the same masses as in the previous measurement of pp→ γB.We also derived the yield of pp annihilation into π0M forM = {\o}, η′, ω, ρ{variant}0, η and π0.",

author = "M. Chiba and K. Doi and T. Fujitani and J. Iwahori and M. Kawaguti and M. Kobayashi and M. Koike and T. Kozuki and S. Kurokawa and H. Kusumoto and H. Nagano and Y. Nagashima and T. Omori and S. Sugimoto and M. Takasaki and F. Takeutchi and M. Tsuchiya and M. Ueda and Y. Yamaguchi and H. Yoshida",

year = "1988",

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doi = "10.1016/0370-2693(88)90501-1",

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TY - JOUR

T1 - Search for narrow peaks in inclusive π0 spectra from pp annihilation at rest

AU - Chiba, M.

AU - Doi, K.

AU - Fujitani, T.

AU - Iwahori, J.

AU - Kawaguti, M.

AU - Kobayashi, M.

AU - Koike, M.

AU - Kozuki, T.

AU - Kurokawa, S.

AU - Kusumoto, H.

AU - Nagano, H.

AU - Nagashima, Y.

AU - Omori, T.

AU - Sugimoto, S.

AU - Takasaki, M.

AU - Takeutchi, F.

AU - Tsuchiya, M.

AU - Ueda, M.

AU - Yamaguchi, Y.

AU - Yoshida, H.

PY - 1988/3/10

Y1 - 1988/3/10

N2 - By using modularized NaI(Tl) detectors, we carried out a high statistics measurement of inclusive π0 spectra from pp annihilation at rest. We did not observe any narrow π0 peaks arising from baryonium production, pp→π0B. The σ upper limit of the yield varied between 10-2 and 10-4 depending on the mass and oncharge multiplicity. Three narrow peaks at 2 σ levels were seen at approximately the same masses as in the previous measurement of pp→ γB.We also derived the yield of pp annihilation into π0M forM = ø, η′, ω, ρ{variant}0, η and π0.

AB - By using modularized NaI(Tl) detectors, we carried out a high statistics measurement of inclusive π0 spectra from pp annihilation at rest. We did not observe any narrow π0 peaks arising from baryonium production, pp→π0B. The σ upper limit of the yield varied between 10-2 and 10-4 depending on the mass and oncharge multiplicity. Three narrow peaks at 2 σ levels were seen at approximately the same masses as in the previous measurement of pp→ γB.We also derived the yield of pp annihilation into π0M forM = ø, η′, ω, ρ{variant}0, η and π0.

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U2 - 10.1016/0370-2693(88)90501-1

DO - 10.1016/0370-2693(88)90501-1

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SN - 0370-2693

VL - 202

SP - 447

EP - 452

JO - Physics Letters B

JF - Physics Letters B

IS - 3

ER -

Search for narrow peaks in inclusive π⁰ spectra from pp annihilation at rest

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