理論センター

橋本 省二

橋本 省二HASHIMOTO, Shoji

  • 所属グループ:格子QCD
  • 役職:教授
    Professor
  • 居室番号:202
  • eメールアドレス:shoji.hashimoto-AT-kek.jp

研究内容

量子色力学(QCD)を格子上に定義して数値シミュレーションを使って計算する格子QCDの研究が主な課題です。場の理論を非摂動的に解くことができるので、低エネルギーでの粒子の性質など、さまざまなことを調べることができます。

経歴

1990年 3月 広島大学 理学部 物理学科 卒業
1994年 7月 広島大学大学院 理学研究科博士課程 修了、博士(理学)
1994年 8月 日本学術振興会特別研究員
1995年 8月 高エネルギー物理学研究所・データ処理センター・助手
2002年 6月 高エネルギー加速器研究機構・素粒子原子核研究所・助教授
2010年 9月 高エネルギー加速器研究機構・素粒子原子核研究所・教授

論文リスト

主な論文リスト

  • H. Fukaya, S. Aoki, T.W. Chiu, S. Hashimoto, T. Kaneko, J. Noaki, T. Onogi, N. Yamada [JLQCD and TWQCD collaborations], "Determination of the chiral condensate from QCD Dirac spectrum on the lattice," Physical Review D83, 074501 (2011).
  • K. Takeda, S. Aoki, S. Hashimoto, T. Kaneko, J. Noaki, T. Onogi [JLQCD collaboration], "Nucleon strange quark content from two-flavor lattice QCD with exact chiral symmetry", Physical Review D83, 114506 (2011).
  • E. Shintani, S. Aoki, H. Fukaya, S. Hashimoto, T. Kaneko, T. Onogi, N. Yamada [JLQCD collaboration], "Strong coupling constant from vacuum polarization functions in three-flavor lattice QCD with dynamical overlap fermions," Physical Review D82, 074505 (2010).
  • H. Fukaya, S. Aoki, S. Hashimoto, T. Kaneko, J. Noaki, T. Onogi, N. Yamada [JLQCD collaboration], "Determination of the chiral condensate from 2+1-flavor lattice QCD," Physical Review Letters 104, 122002 (2010).
  • J.Noaki, T.W.Chiu, H.Fukaya, S.Hashimoto, H.Matsufuru, T.Onogi, E.Shintani, N.Yamada [JLQCD and TWQCD collaborations], "Non-perturbative renormalization of bilinear operators with dynamical overlap fermions," Physical Review D81, 034502 (2010).
  • S.Aoki, T.W.Chiu, H.Fukaya, S.Hashimoto, T.H.Hsieh, T.Kaneko, H.Matsufuru, J.Noaki, T.Onogi, E.Shintani, N.Yamada [JLQCD and TWQCD collaborations], "Pion form factors from two-flavor lattice QCD with exact chiral symmetry," Physical Review D80, 034508 (2009).
  • E. Shintani, S. Aoki, T.W. Chiu, S. Hashimoto, T.H. Hsieh, T. Kaneko, H. Matsufuru, J. Noaki, T. Onogi, N. Yamada [JLQCD and TWQCD collaborations], “Lattice calculation of strong coupling constant from vacuum polarization functions,” Physical Review D82, 074505 (2009).
  • H. Ohki, H. Fukaya, S. Hashimoto, T. Kaneko, H. Matsufuru, J. Noaki, T. Onogi, E. Shintani, N. Yamada [JLQCD collaboration], “Nucleon sigma term and strange quark content from lattice QCD with exact chiral symmetry,” Physical Review D78, 054502 (2008).
  • E. Shintani, S. Aoki, H. Fukaya, S. Hashimoto, T. Kaneko, H. Matsufuru, T. Onogi, N. Yamada, “S-parameter and pseudo-Nambu-Goldstone boson mass from lattice QCD,” Physical Review Letters, 101, 242001 (2008).
  • J. Noaki, S. Aoki, T.W. Chiu, H. Fukaya, S. Hashimoto, T.H. Hsieh, T. Kaneko, H. Matsufuru, T. Onogi, E. Shintani, N. Yamada, “Convergence of the chiral expansion in two-flavor QCD,” Physical Review Letters, 101, 202004 (2008).
  • S. Aoki, H. Fukaya, S. Hashimoto, K.-I. Ishikawa, K. Kanaya, T. Kaneko, H. Matsufuru, M. Okamoto, M. Okawa, T. Onogi, A. Ukawa, N. Yamada, T. Yoshie, “Two-flavor QCD simulation with exact chiral symmetry,” Physical Review D78, 014508 (2008).
  • S. Aoki, T.W. Chiu, H. Fukaya, S. Hashimoto, T.H. Hsieh, T. Kaneko, H. Matsufuru, J. Noaki, K. Ogawa, T. Onogi, N. Yamada, “Topological susceptibility in two-flavor lattice QCD with exact chiral symmetry,” Physics Letters B665, 294-297 (2008).
  • S. Aoki, H. Fukaya, S. Hashimoto, J. Noaki, T. Kaneko, H. Matsufuru, T. Onogi, N. Yamada [JLQCD collaboration], “B_K with two flavors of dynamical overlap fermions,” Physical Review D77, 094503 (2008).
  • H. Fukaya, S. Aoki, S. Hashimoto, T. Kaneko, H. Matsufuru, J. Noaki, K. Ogawa, T. Onogi, N. Yamada [JLQCD collaboration], “Lattice study of meson correlators in the epsilon-regime of two-flavor QCD,” Physical Review D77, 074503 (2008).
  • S. Aoki, H. Fukaya, S. Hashimoto, T. Onogi, “Finite volume QCD at fixed topological charge,” Physical Review D76, 054508 (2007).
  • H. Fukaya, S. Aoki, T.W. Chiu, S. Hashimoto, T. Kaneko, H. Matsufuru, J. Noaki, K. Ogawa, T. Onogi, N. Yamada [JLQCD collaboration], “Two-flavor lattice QCD in the epsilon-regime and chiral random matrix theory,” Physical Review D76, 054503 (2007).
  • H. Fukaya, S. Aoki, T.W. Chiu, S. Hashimoto, T. Kaneko, H. Matsufuru, J. Noaki, K. Ogawa, M. Okamoto, T. Onogi, N. Yamada [JLQCD collaboration], “Two-flavor lattice QCD simulation in the epsilon-regime with exact chiral symmetry,” Physical Review Letters 98, 172001 (2007).
  • H. Fukaya, S. Hashimoto, K. Ishikawa, T. Kaneko, H. Matsufuru, T. Onogi, N. Yamada, “Lattice gauge action suppressing near-zero modes of HW,” Physical Review D74, 094505 (2006).
  • H. Fukaya, S. Hashimoto, T. Hirohashi, K. Ogawa, T. Onogi, “Topology conserving gauge action and the overlap-Dirac operator,” Physical Review D73, 014503 (2006).
  • K. Ogawa, S. Hashimoto, “Effect of low-lying fermion modes in the epsilon-regime of QCD,” Progress of Theoretical Physics 114, 609-629 (2005).
  • H. Fukaya, S. Hashimoto, K. Ogawa, “Low-lying mode contribution to the quenched meson correlators in the ε-regime,” Progress of Theoretical Physics 114, 451-476 (2005).
  • S. Hashimoto, “Recent results from lattice calculations,” International Journal of Modern Physics A20, 5133-5144 (2005).
  • S. Aoki, M. Fukugita, S. Hashimoto, K. Ishikawa, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneko, Y. Kuramashi, M. Okawa, N. Tsutsui, A. Ukawa, N. Yamada, T. Yoshie [JLQCD collaboration], “Bulk first-order phase transition in three-flavor lattice QCD with O(a)-improved Wilson fermion action at zero temperature,” Physical Review D72, 054510 (2005).
  • S. Hashimoto, T. Onogi, “Heavy quarks on the lattice,” Annual Review of Nuclear and Particle Sciences 54, 451-486 (2004).
  • S. Aoki, M. Fukugita, S. Hashimoto, K. Ishikawa, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneko, Y. Kuramashi, M. Okawa, T. Onogi, N. Tsutsui, A. Ukawa, N. Yamada, T. Yoshie [JLQCD collaboration], “B0-B0bar mixing in unquenched lattice QCD,” Physical Review Letters 91, 212001 (2003).
  • S. Hashimoto, A.S. Kronfeld, P.B. Mackenzie, S.M. Ryan, J.N. Simone, “Lattice calculation of the zero recoil form-factor of B→D*lnu: toward a model independent determination of |Vcb|,” Physical Review D66, 014503 (2002).
  • S. Aoki, M. Fukugita, S. Hashimoto, K. Ishikawa, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneko, Y. Kuramashi, M. Okawa, T. Onogi, S. Tominaga, N. Tsutsui, A. Ukawa, N. Yamada, T. Yoshie [JLQCD collaboration], “Differential decay rate of B→pi lnu semileptonic decay with lattice NRQCD,” Physical Review D64, 114505 (2001).
  • S. Hashimoto, A.X. El-Khadra, A.S. Kronfeld, P.B. Mackenzie, S.M. Ryan, J.N. Simone, “Lattice QCD calculation of B→D lnu decay form-factors at zero recoil,” Physical Review D61, 014502 (2000).
  • K. Ishikawa, N. Yamada, S. Aoki, M. Fukugita, S. Hashimoto, N. Ishizuka, Y. Iwasaki, K. Kanaya, T. Kaneda, S. Kaya, Y. Kuramashi, H. Matsufuru, M. Okawa, T. Onogi, S. Tominaga, N. Tsutsui, A. Ukawa, T. Yoshie [JLQCD collaboration], “B meson leptonic decay constant with quenched lattice NRQCD,” Physical Review D61, 074501 (2000).
  • S. Aoki, M. Fukugita, S. Hashimoto, N. Ishizuka, Y. Iwasaki, K. Kanaya, Y. Kuramashi, M. Okawa, A. Ukawa, T. Yoshie [JLQCD collaboration], “Heavy meson decay constants from quenched lattice QCD,” Physical Review Letters 80, 5711-5715 (1998).
  • S. Aoki, M. Fukugita, S. Hashimoto, N. Ishizuka, H. Mino, M. Okawa, T. Onogi, A. Ukawa, “Manifestation of sea quark effects in the strong coupling constant in lattice QCD,” Physical Review Letters 74, 22-25 (1995).
  • S. Hashimoto, J. Kodaira, Y. Yasui, K. Sasaki, “The background field method: alternative way of deriving the pinch technique’s results,” Physical Review D50, 7066-7076 (1994).
  • S. Hashimoto, “Computation of the heavy-light decay constant using non-relativistic lattice QCD,” Physical Review D50, 4639-4648 (1994).

その他の解説など

  • 「質量はどのように生まれるのか」、講談社ブルーバックス、2010年4月。
  • 橋本省二「格子QCD計算で対称性の自発的破れを調べる」、原子核研究 (2009)。
  • 深谷英則、橋本省二「量子色力学におけるカイラル対称性の破れの数値的検証」、日本物理学会誌、2008年4月。

研究発表リスト

研究発表など

  • "Simulation the vacuum in the femto-scale" invited plenary talk at Conference on Computational Physics 2009, Dec 15-19, 2009, Kaohsiung, Taiwan.
  • "Lattice QCD", invited talk at The XXIX Physics in Collision, Aug 30 - Sep 2, 2009, Kobe.
  • "Spontaneous chiral symmetry breaking on the lattice," invited plenary talk at Chiral Dynamics 2009, Jul 6-10, 2009, Bern, Switzerland.
  • 「格子シミュレーションでさぐるQCD真空」、日本物理学会2008年秋期大会特別講演、山形大学、2008年9月。
  • “Physics results from dynamical overlap fermion simulations,” plenary talk at Lattice 2008 (26th In ternational Symposium on Lattice Field Theory), Virginia, US, Jul 2008.

追記