Search for a light scalar top squark in e+e- reactions at Ec.m.=58 GeV

J. Shirai, T. Ohmoto, K. Abe, K. Amako, Y. Arai, Tatsumi Arima, Y. Asano, M. Chiba, Y. Chiba, M. Daigo, M. Fukawa, Y. Fukushima, J. Haba, H. Hanai, Y. Hemmi, M. Higuchi, F. Hinode, T. Hirose, Y. Homma, N. HosodaN. Ishihara, Y. Iwata, N. Kanda, N. Kanematsu, J. Kanzaki, R. Kikuchi, T. Kondo, T. T. Korhonen, A. E. Krüger, H. Kurashige, J. MacNaughton, E. K. Matsuda, T. Matsui, M. Miura, K. Miyake, S. Mori, Y. Nagashima, Y. Nakagawa, T. Nakamura, I. Nakano, S. Odaka, K. Ogawa, T. Ohama, T. Ohsugi, H. Ohyama, A. Okamoto, A. Ono, T. Oyama, H. Sakamoto, M. Sakuda, M. Sato, N. Sato, M. Shioden, M. Shirakata, T. Sumiyoshi, A. Suzuki, Y. Takada, H. Takaki, F. Takasaki, M. Takita, N. Tamura, K. Tobimatsu, T. Tsuboyama, S. Uehara, Y. Unno, M. Utsumi, Y. Watase, F. Yabuki, Y. Yamada, T. Yamagata, Y. Yamamoto, Y. Yonezawa, H. Yoshida

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Abstract

A search has been made for a light scalar top squark (t1), which has remained unexcluded by previous e+e- experiments up to the Z0 pole. By assuming the decay t1→c+Z1 (lightest neutralino), e+e- annihilation data at Ec.m.=58 GeV have been analyzed. The number of events comprising large-acoplanarity particle groups is consistent with that expected from known processes. We excluded t1 in the mass range 7.6-28.0 GeV/c2 and Z1 with a mass very close to the kinematical limit at the 95% C.L.

Original languageEnglish
Pages (from-to)3313-3316
Number of pages4
JournalPhysical Review Letters
Volume72
Issue number21
DOIs
Publication statusPublished - Jan 1 1994
Externally publishedYes

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scalars
poles
decay

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Shirai, J., Ohmoto, T., Abe, K., Amako, K., Arai, Y., Arima, T., ... Yoshida, H. (1994). Search for a light scalar top squark in e+e- reactions at Ec.m.=58 GeV. Physical Review Letters, 72(21), 3313-3316. https://doi.org/10.1103/PhysRevLett.72.3313

Search for a light scalar top squark in e+e- reactions at Ec.m.=58 GeV. / Shirai, J.; Ohmoto, T.; Abe, K.; Amako, K.; Arai, Y.; Arima, Tatsumi; Asano, Y.; Chiba, M.; Chiba, Y.; Daigo, M.; Fukawa, M.; Fukushima, Y.; Haba, J.; Hanai, H.; Hemmi, Y.; Higuchi, M.; Hinode, F.; Hirose, T.; Homma, Y.; Hosoda, N.; Ishihara, N.; Iwata, Y.; Kanda, N.; Kanematsu, N.; Kanzaki, J.; Kikuchi, R.; Kondo, T.; Korhonen, T. T.; Krüger, A. E.; Kurashige, H.; MacNaughton, J.; Matsuda, E. K.; Matsui, T.; Miura, M.; Miyake, K.; Mori, S.; Nagashima, Y.; Nakagawa, Y.; Nakamura, T.; Nakano, I.; Odaka, S.; Ogawa, K.; Ohama, T.; Ohsugi, T.; Ohyama, H.; Okamoto, A.; Ono, A.; Oyama, T.; Sakamoto, H.; Sakuda, M.; Sato, M.; Sato, N.; Shioden, M.; Shirakata, M.; Sumiyoshi, T.; Suzuki, A.; Takada, Y.; Takaki, H.; Takasaki, F.; Takita, M.; Tamura, N.; Tobimatsu, K.; Tsuboyama, T.; Uehara, S.; Unno, Y.; Utsumi, M.; Watase, Y.; Yabuki, F.; Yamada, Y.; Yamagata, T.; Yamamoto, Y.; Yonezawa, Y.; Yoshida, H.

In: Physical Review Letters, Vol. 72, No. 21, 01.01.1994, p. 3313-3316.

Research output: Contribution to journalArticle

Shirai, J, Ohmoto, T, Abe, K, Amako, K, Arai, Y, Arima, T, Asano, Y, Chiba, M, Chiba, Y, Daigo, M, Fukawa, M, Fukushima, Y, Haba, J, Hanai, H, Hemmi, Y, Higuchi, M, Hinode, F, Hirose, T, Homma, Y, Hosoda, N, Ishihara, N, Iwata, Y, Kanda, N, Kanematsu, N, Kanzaki, J, Kikuchi, R, Kondo, T, Korhonen, TT, Krüger, AE, Kurashige, H, MacNaughton, J, Matsuda, EK, Matsui, T, Miura, M, Miyake, K, Mori, S, Nagashima, Y, Nakagawa, Y, Nakamura, T, Nakano, I, Odaka, S, Ogawa, K, Ohama, T, Ohsugi, T, Ohyama, H, Okamoto, A, Ono, A, Oyama, T, Sakamoto, H, Sakuda, M, Sato, M, Sato, N, Shioden, M, Shirakata, M, Sumiyoshi, T, Suzuki, A, Takada, Y, Takaki, H, Takasaki, F, Takita, M, Tamura, N, Tobimatsu, K, Tsuboyama, T, Uehara, S, Unno, Y, Utsumi, M, Watase, Y, Yabuki, F, Yamada, Y, Yamagata, T, Yamamoto, Y, Yonezawa, Y & Yoshida, H 1994, 'Search for a light scalar top squark in e+e- reactions at Ec.m.=58 GeV', Physical Review Letters, vol. 72, no. 21, pp. 3313-3316. https://doi.org/10.1103/PhysRevLett.72.3313
Shirai, J. ; Ohmoto, T. ; Abe, K. ; Amako, K. ; Arai, Y. ; Arima, Tatsumi ; Asano, Y. ; Chiba, M. ; Chiba, Y. ; Daigo, M. ; Fukawa, M. ; Fukushima, Y. ; Haba, J. ; Hanai, H. ; Hemmi, Y. ; Higuchi, M. ; Hinode, F. ; Hirose, T. ; Homma, Y. ; Hosoda, N. ; Ishihara, N. ; Iwata, Y. ; Kanda, N. ; Kanematsu, N. ; Kanzaki, J. ; Kikuchi, R. ; Kondo, T. ; Korhonen, T. T. ; Krüger, A. E. ; Kurashige, H. ; MacNaughton, J. ; Matsuda, E. K. ; Matsui, T. ; Miura, M. ; Miyake, K. ; Mori, S. ; Nagashima, Y. ; Nakagawa, Y. ; Nakamura, T. ; Nakano, I. ; Odaka, S. ; Ogawa, K. ; Ohama, T. ; Ohsugi, T. ; Ohyama, H. ; Okamoto, A. ; Ono, A. ; Oyama, T. ; Sakamoto, H. ; Sakuda, M. ; Sato, M. ; Sato, N. ; Shioden, M. ; Shirakata, M. ; Sumiyoshi, T. ; Suzuki, A. ; Takada, Y. ; Takaki, H. ; Takasaki, F. ; Takita, M. ; Tamura, N. ; Tobimatsu, K. ; Tsuboyama, T. ; Uehara, S. ; Unno, Y. ; Utsumi, M. ; Watase, Y. ; Yabuki, F. ; Yamada, Y. ; Yamagata, T. ; Yamamoto, Y. ; Yonezawa, Y. ; Yoshida, H. / Search for a light scalar top squark in e+e- reactions at Ec.m.=58 GeV. In: Physical Review Letters. 1994 ; Vol. 72, No. 21. pp. 3313-3316.
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abstract = "A search has been made for a light scalar top squark (t1), which has remained unexcluded by previous e+e- experiments up to the Z0 pole. By assuming the decay t1→c+Z1 (lightest neutralino), e+e- annihilation data at Ec.m.=58 GeV have been analyzed. The number of events comprising large-acoplanarity particle groups is consistent with that expected from known processes. We excluded t1 in the mass range 7.6-28.0 GeV/c2 and Z1 with a mass very close to the kinematical limit at the 95{\%} C.L.",
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T1 - Search for a light scalar top squark in e+e- reactions at Ec.m.=58 GeV

AU - Shirai, J.

AU - Ohmoto, T.

AU - Abe, K.

AU - Amako, K.

AU - Arai, Y.

AU - Arima, Tatsumi

AU - Asano, Y.

AU - Chiba, M.

AU - Chiba, Y.

AU - Daigo, M.

AU - Fukawa, M.

AU - Fukushima, Y.

AU - Haba, J.

AU - Hanai, H.

AU - Hemmi, Y.

AU - Higuchi, M.

AU - Hinode, F.

AU - Hirose, T.

AU - Homma, Y.

AU - Hosoda, N.

AU - Ishihara, N.

AU - Iwata, Y.

AU - Kanda, N.

AU - Kanematsu, N.

AU - Kanzaki, J.

AU - Kikuchi, R.

AU - Kondo, T.

AU - Korhonen, T. T.

AU - Krüger, A. E.

AU - Kurashige, H.

AU - MacNaughton, J.

AU - Matsuda, E. K.

AU - Matsui, T.

AU - Miura, M.

AU - Miyake, K.

AU - Mori, S.

AU - Nagashima, Y.

AU - Nakagawa, Y.

AU - Nakamura, T.

AU - Nakano, I.

AU - Odaka, S.

AU - Ogawa, K.

AU - Ohama, T.

AU - Ohsugi, T.

AU - Ohyama, H.

AU - Okamoto, A.

AU - Ono, A.

AU - Oyama, T.

AU - Sakamoto, H.

AU - Sakuda, M.

AU - Sato, M.

AU - Sato, N.

AU - Shioden, M.

AU - Shirakata, M.

AU - Sumiyoshi, T.

AU - Suzuki, A.

AU - Takada, Y.

AU - Takaki, H.

AU - Takasaki, F.

AU - Takita, M.

AU - Tamura, N.

AU - Tobimatsu, K.

AU - Tsuboyama, T.

AU - Uehara, S.

AU - Unno, Y.

AU - Utsumi, M.

AU - Watase, Y.

AU - Yabuki, F.

AU - Yamada, Y.

AU - Yamagata, T.

AU - Yamamoto, Y.

AU - Yonezawa, Y.

AU - Yoshida, H.

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