Mesons as Open Strings in a Holographic Dual of QCD(Particles and Fields)

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概要

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• We study meson spectrum obtained from massive open string modes in a holographic dual of QCD constructed on the basis of a D4/D8-brane configuration in type IIA string theory. The spectrum includes mesons with spin higher than one. Taking into account the effect of curved background perturbatively, we obtain a mass formula for these mesons. The mass formula exhibits the linear Regge behavior at the leading order with subleading non-linear corrections. We argue that the string spectrum captures some features of the observed meson spectrum. For example, a_2(1320), b_1(1235), π(1300), a_0(1450), etc., are identified as the first excited massive open string states and ρ_3(1690), π_2(1670), etc., are identified as the second excited states.

• 2010-08-25

著者

• IMOTO Toshiya

  Daiwa Securities Capital Markets Co. Ltd.

• SAKAI Tadakatsu

  Department of Physics, Nagoya University

• SUGIMOTO Shigeki

  Institute for the Physics and Mathematics of the Universe, The University of Tokyo

• Sakai Tadakatsu

  Department Of Physics Nagoya University

• Sakai Tadakatsu

  Department Of Physics Faculty Of Sciences Ibaraki University

• Sakai Tadakatsu

  Department Of Mathematical Sciences Faculty Of Sciences Ibaraki University

• Sugimoto Shigeki

  Institute For The Physics And Mathematics Of The Universe The University Of Tokyo

• Sakai Tadakatsu

  Department of Physics, Nagoya University:Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University

• SAKAI Tadakatsu

  Department of Physics, Faculty of Sciences, Ibaraki University

• SAKAI Tadakatsu

  Department of Physics, Ibaraki University

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