Possible Quantum Numbers of Θ^+(1540) in QCD Sum Rules(Exotic Hadrons,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)
スポンサーリンク
概要
- 論文の詳細を見る
Using the QCD sum rule method, various pentaquark states with strangeness S=+1 are investigated. In order to find a region in the Borel mass, where the the operator product expansion (OPE) is thought to converge and the sum rule is dominated by the resonance pole, we calculate the OPE up to dimension 14 and employ the difference of two independent correlators to construct the sum rules, by which the constributions of the higher-energy continuum states are strongly suppressed. As a result of this investigation, we find stable Borel mass curves for the quantum numbers IJ^π=01/2^-,11/2^-,03/2^+,1/3/2^+,suggesting the existence of resonance poles in these channels. As the width of the J^π=1/2^-states is likely to be very broad, and Θ^+(1540) is thought to be an isosinglet state, we conclude that the most probable candidate for Θ^+(1540) is the state with quantum numbers IJ^π=03/2^+.
- 2010-12-17
著者
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JIDO Daisuke
Yukawa Institute for Theoretical Physics, Kyoto University
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OKA makoto
Department of Physics, Tokyo Institute of Technology
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GUBLER Philipp
Department of Physics, Tokyo Institute of Technology
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Gubler Philipp
Department Of Physics Tokyo Institute Of Technology
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Jido Daisuke
Yukawa Institute For Theoretical Physics Kyoto University
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KOJO Toru
RBRC, Brookhaven National Laboratory
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NISHIKAWA Tetsuo
Faculty of Health Science, Ryotokuji University
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Gubler Philipp
Department Of Physics H-27 Tokyo Institute Of Technology
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KOJO Toru
Department of Physics, Kyoto University
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Oka Makoto
Department Of Physics H-27 Tokyo Institute Of Technology
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Nishikawa Tetsuo
Faculty Of Health Science Ryotokuji University
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OKA Makoto
Department of Pharmacology, Research Laboratories, Dainippon Pharmaceutical Co., Ltd.
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Gubler Philipp
Department of Physics, H-27, Tokyo Institute of Technology
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