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Title: Search for the H-dibaryon resonance in {sup 12}C (K{sup -},K{sup +}{lambda}{lambda}X)

Abstract

The H-dibaryon resonance was sought by a {lambda}{lambda} invariant mass spectrum that was obtained by the {sup 12}C (K{sup -},K{sup +}{lambda}{lambda}X) reactions. We observed a bump near the {lambda}{lambda} threshold, as reported by the previous experiment (KEK E224), with better statistics. Data were compared with results of a cascade model calculation including {lambda}{lambda} final state interactions consistent with the newly measured binding energy of {sub {lambda}}{sub {lambda}}{sup 6}He. No significant enhancements above levels of the model predictions were observed. The resulting upper limit for the production cross section of the H with a mass range between the {lambda}{lambda} and {xi}N threshold is found to be 2.1 {+-} 0.6 (stat.) {+-} 0.1 (syst.) {mu}b/sr at a 90% confidence level.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;  [1]; ;  [2];  [3]; ; ;  [4]
  1. Department of Physics, Kyoto University, Kyoto 606-8502 (Japan)
  2. Physics Department, Tokyo University of Science, Noda 278-8510 (Japan)
  3. High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801 (Japan)
  4. Department of Physics, Osaka University, Osaka 558-8585 (Japan) (and others)
Publication Date:
OSTI Identifier:
20990998
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 2; Other Information: DOI: 10.1103/PhysRevC.75.022201; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BINDING ENERGY; CARBON 12; CROSS SECTIONS; DIBARYONS; FINAL-STATE INTERACTIONS; MASS SPECTRA; POTASSIUM IONS

Citation Formats

Yoon, C. J., Akikawa, H., Aoki, K., Fukao, Y., Funahashi, H., Hayata, M., Imai, K., Miwa, K., Okada, H., Saito, N., Sato, H. D., Shoji, K., Takahashi, H., Taketani, K., Asai, J., Kurosawa, M., Ieiri, M., Hayakawa, T., Kishimoto, T., and Sato, A. Search for the H-dibaryon resonance in {sup 12}C (K{sup -},K{sup +}{lambda}{lambda}X). United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.022201.
Yoon, C. J., Akikawa, H., Aoki, K., Fukao, Y., Funahashi, H., Hayata, M., Imai, K., Miwa, K., Okada, H., Saito, N., Sato, H. D., Shoji, K., Takahashi, H., Taketani, K., Asai, J., Kurosawa, M., Ieiri, M., Hayakawa, T., Kishimoto, T., & Sato, A. Search for the H-dibaryon resonance in {sup 12}C (K{sup -},K{sup +}{lambda}{lambda}X). United States. doi:10.1103/PHYSREVC.75.022201.
Yoon, C. J., Akikawa, H., Aoki, K., Fukao, Y., Funahashi, H., Hayata, M., Imai, K., Miwa, K., Okada, H., Saito, N., Sato, H. D., Shoji, K., Takahashi, H., Taketani, K., Asai, J., Kurosawa, M., Ieiri, M., Hayakawa, T., Kishimoto, T., and Sato, A. Thu . "Search for the H-dibaryon resonance in {sup 12}C (K{sup -},K{sup +}{lambda}{lambda}X)". United States. doi:10.1103/PHYSREVC.75.022201.
@article{osti_20990998,
title = {Search for the H-dibaryon resonance in {sup 12}C (K{sup -},K{sup +}{lambda}{lambda}X)},
author = {Yoon, C. J. and Akikawa, H. and Aoki, K. and Fukao, Y. and Funahashi, H. and Hayata, M. and Imai, K. and Miwa, K. and Okada, H. and Saito, N. and Sato, H. D. and Shoji, K. and Takahashi, H. and Taketani, K. and Asai, J. and Kurosawa, M. and Ieiri, M. and Hayakawa, T. and Kishimoto, T. and Sato, A.},
abstractNote = {The H-dibaryon resonance was sought by a {lambda}{lambda} invariant mass spectrum that was obtained by the {sup 12}C (K{sup -},K{sup +}{lambda}{lambda}X) reactions. We observed a bump near the {lambda}{lambda} threshold, as reported by the previous experiment (KEK E224), with better statistics. Data were compared with results of a cascade model calculation including {lambda}{lambda} final state interactions consistent with the newly measured binding energy of {sub {lambda}}{sub {lambda}}{sup 6}He. No significant enhancements above levels of the model predictions were observed. The resulting upper limit for the production cross section of the H with a mass range between the {lambda}{lambda} and {xi}N threshold is found to be 2.1 {+-} 0.6 (stat.) {+-} 0.1 (syst.) {mu}b/sr at a 90% confidence level.},
doi = {10.1103/PHYSREVC.75.022201},
journal = {Physical Review. C, Nuclear Physics},
number = 2,
volume = 75,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}