Journal
PHYSICS LETTERS B
Volume 728, Issue -, Pages 616-621Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2013.12.039
Keywords
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Funding
- Ministry of Education, Science, Sports and Culture of Japan
- GCOE program in Kyoto University
- National Science Council of the Republic of China (Taiwan)
- National Research Foundation of Korea [2012R1A2A1A01011926]
- National Science Foundation (NSF) [PHY-0244999]
- Foreign Researchers from the Japan Society for the Promotion of Science
- National Research Foundation of Korea [2012R1A2A1A01011926] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Direct For Mathematical & Physical Scien
- Division Of Physics [0969297, 1430152] Funding Source: National Science Foundation
- Division Of Physics
- Direct For Mathematical & Physical Scien [1306137] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [24740164, 24105003, 21105003, 24540305] Funding Source: KAKEN
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A search for the K- pp bound state (the lightest kaonic nucleus) has been performed using the gamma d > K+pi X- reaction at E-gamma= 1.5-2.4 GeV at LEPS/SPring-8. The differential cross section of the K+pi(-) photo-production off deuterium (d(2)sigma/d cos theta(lab)(K+)/d cos theta(lab)(pi-)) has been measured for the first time in this energy region. A peak structure was searched for in the inclusive missing mass spectrum. A statistically significant peak structure was not observed in the region from 2.22 to 2.36 GeV/c(2). The upper limits of the differential cross section of the K- pp bound state production were determined to be (0.17-0.55), (0.55-1.7) and (1.1-2.9) mu b at 95% confidence level with the assumed widths of 20 MeV, 60 MeV and 100 MeV. (C) 2013 The Authors. Published by Elsevier B.V. All rights reserved,
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