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. Hosoda; N. 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; M. 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

doi:10.1007/BF02907443

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, M. 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

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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.

Original language	English
Pages (from-to)	597-606
Number of pages	10
Journal	Zeitschrift für Physik C: Particles and Fields
Volume	69
Issue number	1
DOIs	https://doi.org/10.1007/BF02907443
Publication status	Published - 1995 Dec
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1007/BF02907443

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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., ... 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, 69(1), 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, 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

@article{f4c4ff2e286f402ba440a1af2c6d78ef,

title = "Study of inclusive baryon-antibaryon pair production of p or Λ in two-photon processes",

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.",

author = "S. Uehara and K. Abe and K. Amako and Y. Arai and T. Arima and Y. Asano and M. Chiba and Y. Chiba and M. Daigo and M. Fukawa and Y. Fukushima and J. Haba and H. Hamasaki and H. Hanai and Y. Hemmi and M. Higuchi and F. Hinode and T. Hirose and Y. Homma and N. Hosoda and N. Ishihara and Y. Iwata and J. Kanzaki and R. Kikuchi and T. Kondo and Korhonen, {T. T.} and H. Kurashige and Matsuda, {E. K.} and T. Matsui and M. Miura and K. Miyake and S. Mori and Y. Nagashima and Y. Nakagawa and T. Nakamura and I. Nakano and S. Odaka and K. Ogawa and T. Ohama and T. Ohsugi and H. Ohyama and K. Okabe and A. Okamoto and A. Ono and T. Oyama and J. Pennanen and H. Sakamoto and M. Sakuda and M. Sato and N. Sato and M. Shioden and J. Shirai and M. Shirakata and T. Sumiyoshi and Y. Takada and F. Takasaki and M. Takita and N. Tamura and D. Tatsumi and K. Tobimatsu and T. Tsuboyama and Y. Unno and T. Watanabe and Y. Watase and F. Yabuki and Y. Yamada and T. Yamagata and Y. Yonezawa and H. Yoshida and K. Yusa",

year = "1995",

month = dec,

doi = "10.1007/BF02907443",

language = "English",

volume = "69",

pages = "597--606",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "1",

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TY - JOUR

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, M.

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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UR - http://www.scopus.com/inward/citedby.url?scp=0009418476&partnerID=8YFLogxK

U2 - 10.1007/BF02907443

DO - 10.1007/BF02907443

M3 - Article

AN - SCOPUS:0009418476

SN - 1434-6044

VL - 69

SP - 597

EP - 606

JO - European Physical Journal C

JF - European Physical Journal C

IS - 1

ER -

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

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