Study of inclusive baryon-antibaryon pair production of p or Λ in two-photon processes

S. Uehara, K. Abe, K. Amako, Y. Arai, T. Arima, Y. Asano, M. Chiba, Y. Chiba, M. Daigo, M. Fukawa, Y. Fukushima, J. Haba, H. Hamasaki, H. Hanai, Y. Hemmi, M. Higuchi, F. Hinode, T. Hirose, Y. Homma, N. HosodaN. Ishihara, Y. Iwata, J. Kanzaki, R. Kikuchi, T. Kondo, T. T. Korhonen, H. Kurashige, 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, K. Okabe, A. Okamoto, A. Ono, T. Oyama, J. Pennanen, H. Sakamoto, Makoto Sakuda, M. Sato, N. Sato, M. Shioden, J. Shirai, M. Shirakata, T. Sumiyoshi, Y. Takada, F. Takasaki, M. Takita, N. Tamura, D. Tatsumi, K. Tobimatsu, T. Tsuboyama, Y. Unno, T. Watanabe, Y. Watase, F. Yabuki, Y. Yamada, T. Yamagata, Y. Yonezawa, H. Yoshida, K. Yusa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Inclusive baryon-antibaryon pair production was studied in two-photon events which were collected at the e + e - collider TRISTAN, and correspond to an integrated luminosity of 303 pb-1. Correlations between a baryon and an antibaryon were studied for their flavors (p or Λ) and their momentum vectors. The experimental results were compared with the expectations from a jet-fragmentation Monte Carlo simulation. We have found that although the ratios of the cross sections of different baryon-flavor combinations are consistent with the Monte Carlo expectations, the cross section shows an excess over the Monte Carlo expectation in a low invariant-mass region of final-state particles at large angles, that indicates a significant contribution from higher-order QCD or non-perturbative effects. The experimental data show no narrow azimuthal-angle correlation, which is expected from a jet-fragmentation Monte Carlo. A search for exclusive Λ pair production has also been made. We have no candidates and have obtained the upper limit for the cross section.

Original languageEnglish
Pages (from-to)597-606
Number of pages10
JournalZeitschrift für Physik C Particles and Fields
Volume69
Issue number1
DOIs
Publication statusPublished - Dec 1995
Externally publishedYes

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Elementary Particles
Two photon processes
Flavors
pair production
Photons
baryons
Colliding beam accelerators
cross sections
fragmentation
photons
Luminance
Momentum
quantum chromodynamics
luminosity
momentum
simulation

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cite this

Study of inclusive baryon-antibaryon pair production of p or Λ in two-photon processes. / Uehara, S.; Abe, K.; Amako, K.; Arai, Y.; Arima, T.; Asano, Y.; Chiba, M.; Chiba, Y.; Daigo, M.; Fukawa, M.; Fukushima, Y.; Haba, J.; Hamasaki, H.; Hanai, H.; Hemmi, Y.; Higuchi, M.; Hinode, F.; Hirose, T.; Homma, Y.; Hosoda, N.; Ishihara, N.; Iwata, Y.; Kanzaki, J.; Kikuchi, R.; Kondo, T.; Korhonen, T. T.; Kurashige, H.; 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.; Okabe, K.; Okamoto, A.; Ono, A.; Oyama, T.; Pennanen, J.; Sakamoto, H.; Sakuda, Makoto; Sato, M.; Sato, N.; Shioden, M.; Shirai, J.; Shirakata, M.; Sumiyoshi, T.; Takada, Y.; Takasaki, F.; Takita, M.; Tamura, N.; Tatsumi, D.; Tobimatsu, K.; Tsuboyama, T.; Unno, Y.; Watanabe, T.; Watase, Y.; Yabuki, F.; Yamada, Y.; Yamagata, T.; Yonezawa, Y.; Yoshida, H.; Yusa, K.

In: Zeitschrift für Physik C Particles and Fields, Vol. 69, No. 1, 12.1995, p. 597-606.

Research output: Contribution to journalArticle

Uehara, S, Abe, K, Amako, K, Arai, Y, Arima, T, Asano, Y, Chiba, M, Chiba, Y, Daigo, M, Fukawa, M, Fukushima, Y, Haba, J, Hamasaki, H, Hanai, H, Hemmi, Y, Higuchi, M, Hinode, F, Hirose, T, Homma, Y, Hosoda, N, Ishihara, N, Iwata, Y, Kanzaki, J, Kikuchi, R, Kondo, T, Korhonen, TT, Kurashige, H, 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, Okabe, K, Okamoto, A, Ono, A, Oyama, T, Pennanen, J, Sakamoto, H, Sakuda, M, Sato, M, Sato, N, Shioden, M, Shirai, J, Shirakata, M, Sumiyoshi, T, Takada, Y, Takasaki, F, Takita, M, Tamura, N, Tatsumi, D, Tobimatsu, K, Tsuboyama, T, Unno, Y, Watanabe, T, Watase, Y, Yabuki, F, Yamada, Y, Yamagata, T, Yonezawa, Y, Yoshida, H & Yusa, K 1995, 'Study of inclusive baryon-antibaryon pair production of p or Λ in two-photon processes', Zeitschrift für Physik C Particles and Fields, vol. 69, no. 1, pp. 597-606. https://doi.org/10.1007/BF02907443
Uehara, S. ; Abe, K. ; Amako, K. ; Arai, Y. ; Arima, T. ; Asano, Y. ; Chiba, M. ; Chiba, Y. ; Daigo, M. ; Fukawa, M. ; Fukushima, Y. ; Haba, J. ; Hamasaki, H. ; Hanai, H. ; Hemmi, Y. ; Higuchi, M. ; Hinode, F. ; Hirose, T. ; Homma, Y. ; Hosoda, N. ; Ishihara, N. ; Iwata, Y. ; Kanzaki, J. ; Kikuchi, R. ; Kondo, T. ; Korhonen, T. T. ; Kurashige, H. ; 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. ; Okabe, K. ; Okamoto, A. ; Ono, A. ; Oyama, T. ; Pennanen, J. ; Sakamoto, H. ; Sakuda, Makoto ; Sato, M. ; Sato, N. ; Shioden, M. ; Shirai, J. ; Shirakata, M. ; Sumiyoshi, T. ; Takada, Y. ; Takasaki, F. ; Takita, M. ; Tamura, N. ; Tatsumi, D. ; Tobimatsu, K. ; Tsuboyama, T. ; Unno, Y. ; Watanabe, T. ; Watase, Y. ; Yabuki, F. ; Yamada, Y. ; Yamagata, T. ; Yonezawa, Y. ; Yoshida, H. ; Yusa, K. / Study of inclusive baryon-antibaryon pair production of p or Λ in two-photon processes. In: Zeitschrift für Physik C Particles and Fields. 1995 ; Vol. 69, No. 1. pp. 597-606.
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abstract = "Inclusive baryon-antibaryon pair production was studied in two-photon events which were collected at the e + e - collider TRISTAN, and correspond to an integrated luminosity of 303 pb-1. Correlations between a baryon and an antibaryon were studied for their flavors (p or Λ) and their momentum vectors. The experimental results were compared with the expectations from a jet-fragmentation Monte Carlo simulation. We have found that although the ratios of the cross sections of different baryon-flavor combinations are consistent with the Monte Carlo expectations, the cross section shows an excess over the Monte Carlo expectation in a low invariant-mass region of final-state particles at large angles, that indicates a significant contribution from higher-order QCD or non-perturbative effects. The experimental data show no narrow azimuthal-angle correlation, which is expected from a jet-fragmentation Monte Carlo. A search for exclusive Λ pair production has also been made. We have no candidates and have obtained the upper limit for the cross section.",
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T1 - Study of inclusive baryon-antibaryon pair production of p or Λ in two-photon processes

AU - Uehara, S.

AU - Abe, K.

AU - Amako, K.

AU - Arai, Y.

AU - Arima, T.

AU - Asano, Y.

AU - Chiba, M.

AU - Chiba, Y.

AU - Daigo, M.

AU - Fukawa, M.

AU - Fukushima, Y.

AU - Haba, J.

AU - Hamasaki, H.

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 - Kanzaki, J.

AU - Kikuchi, R.

AU - Kondo, T.

AU - Korhonen, T. T.

AU - Kurashige, H.

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 - Okabe, K.

AU - Okamoto, A.

AU - Ono, A.

AU - Oyama, T.

AU - Pennanen, J.

AU - Sakamoto, H.

AU - Sakuda, Makoto

AU - Sato, M.

AU - Sato, N.

AU - Shioden, M.

AU - Shirai, J.

AU - Shirakata, M.

AU - Sumiyoshi, T.

AU - Takada, Y.

AU - Takasaki, F.

AU - Takita, M.

AU - Tamura, N.

AU - Tatsumi, D.

AU - Tobimatsu, K.

AU - Tsuboyama, T.

AU - Unno, Y.

AU - Watanabe, T.

AU - Watase, Y.

AU - Yabuki, F.

AU - Yamada, Y.

AU - Yamagata, T.

AU - Yonezawa, Y.

AU - Yoshida, H.

AU - Yusa, K.

PY - 1995/12

Y1 - 1995/12

N2 - Inclusive baryon-antibaryon pair production was studied in two-photon events which were collected at the e + e - collider TRISTAN, and correspond to an integrated luminosity of 303 pb-1. Correlations between a baryon and an antibaryon were studied for their flavors (p or Λ) and their momentum vectors. The experimental results were compared with the expectations from a jet-fragmentation Monte Carlo simulation. We have found that although the ratios of the cross sections of different baryon-flavor combinations are consistent with the Monte Carlo expectations, the cross section shows an excess over the Monte Carlo expectation in a low invariant-mass region of final-state particles at large angles, that indicates a significant contribution from higher-order QCD or non-perturbative effects. The experimental data show no narrow azimuthal-angle correlation, which is expected from a jet-fragmentation Monte Carlo. A search for exclusive Λ pair production has also been made. We have no candidates and have obtained the upper limit for the cross section.

AB - Inclusive baryon-antibaryon pair production was studied in two-photon events which were collected at the e + e - collider TRISTAN, and correspond to an integrated luminosity of 303 pb-1. Correlations between a baryon and an antibaryon were studied for their flavors (p or Λ) and their momentum vectors. The experimental results were compared with the expectations from a jet-fragmentation Monte Carlo simulation. We have found that although the ratios of the cross sections of different baryon-flavor combinations are consistent with the Monte Carlo expectations, the cross section shows an excess over the Monte Carlo expectation in a low invariant-mass region of final-state particles at large angles, that indicates a significant contribution from higher-order QCD or non-perturbative effects. The experimental data show no narrow azimuthal-angle correlation, which is expected from a jet-fragmentation Monte Carlo. A search for exclusive Λ pair production has also been made. We have no candidates and have obtained the upper limit for the cross section.

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