109, 114032-1, 114032-18, 21 Jun. 2024, QCD sum rules for positive and negative parity heavy baryons in the heavy quark limit are formulated. We apply the method to Λ and Σ channels. We include the next-to-leading order corrections in αs-expansion to dimension 0 and 3 terms in the operator product expansion. The corrections lead to the considerable reduction of the predicted masses and significantly improves the stability with respect to the Borel parameter, especially for negative parity states. It is also found that, in the heavy quark limit, chiral odd condensates do not contribute to the negative parity states.
28 Feb. 2022
Teaching Material of Polarizers in Elementary Science Education: Statistical Study Based on Unpaired and Paired sample Tests, 28 Feb. 2023
437, 439, 01 Dec. 1987, M.Iwasaki, Y.Kondo
535, 545, 01 Sep. 1988, Y.Kondo, M.Iwasaki
1, 6, 01 Feb. 1990, Y.Kondo, S.Saito, T.Otofuji
316, 320, 01 Mar. 1991, Y.Kondo, S.Saito, T.Otofuji
113, 121, 01 Jan. 1992, Y.Kondo, S.Saito
99, 113, 01 Jan. 1992, K. Fujii, Y. Kondo, S. Saito
2528, 2533, 01 Apr. 1992, T.Otofuji, Y.Kondo, S.Saito, R.Seki
2855, 2858, 01 Nov. 1993, Y.Kondo, O.Morimatsu
50巻, 718, 721, 01 Jan. 1995, 近藤良彦、森松 治
501, 518, 01 Jan. 1996, Y. Kondo, S. Saito, Y. Tanushi, M. Uehara
1927, 1935, 01 Apr. 1996, Y.Kondo, O.Morimatsu, Y.Nishino
417, 440, 01 Jan. 1997, T. Nishikawa, S. Saito, Y. Kondo
26, 32, 01 Mar. 1998, T. Nishikawa, S. Saito, Y. Kondo
1, 19, 01 Jul. 1998, Y.Kondo, O.Morimatsu
New Approach to Axial Coupling Constants in the QCD Sum Rule, Physical Review Letters,Vol.84, 2326, 2329, 01 Mar. 2000, T.Nishikawa, S.Saito, Y.Kondo
QCD Sum Rules for Nucleon-Nucleon and Hyperon-Nucleon Interactions, Nuclear Physics, A670, 01 May 2000, 森松 治
Model-independent study of the QCD sum rule for the πNN coupling constant, Rhysical Review, C66, 01 Aug. 2002, 森松 治
A projected correlation function approach toπNN coupling constant in QCD sum rules, Nuclear Physics, A717, 55, 72, 01 Apr. 2003, 森松治
QCD Sum Rules for Hyperon-Nucleon Interactions, Physical Review, C69, 01 May 2004, 森松治
Meson-Baryon Couplings from QCD Sum Rules, Physics Report, 398, 253, 279, 01 Sep. 2004, 土井琢身、岡真
Θ⁺⁺ form the QCD sum rule, Physical Review, D71, 01 Jan. 2005, 西川哲夫、金田・延與佳子、森松治
Two-hadron-irreducible QCD sum rule for pentaquark baryon, Physics Letter, B611, 93, 101, 01 Mar. 2005, 森松治、西川哲夫
Spin-3/2 pentaquark in the QCD sum rule approach, Physical Review, D71, 01 Apr. 2005, 西川哲夫、金田・延與佳子、森松治
Coupled QCD sum rules for positive and negative-parity nucleons, Yoshihiko Kondo, Osamu Morimatsu, Tetsuo Nishikawa, Nuclear Physics A 764 (2006) 303, 303, 312, 01 Jan. 2006, Elsevier B.V., 森松治、西川哲夫, A new approach of the QCD sum rule is proposed in which positive and negative-parity baryons couple with each other. With positive and negative-parity states explicitly taken into account, sum rules are derived by means of the dispersion relation in energy. The method is applied to the nucleon channel and the parity splitting of the nucleon resonance states is studied. The predicted masses of the positive and negative nucleons reproduce the experimental ones fairly well. Especially, the mass difference is extremely close to the experimental value.
Positive and negative-parity flavor-octet baryons in coupled QCD sum rules, Yoshihiko Kondo, Osamu Morimatsu, Tetsuo Nishikawa, Yoshiko Kanada-En’yo, Physical Review D 75, 034010 (2007), Volume 75, Number 3, 034010, 01 Feb. 2007, The American Physical Society, 森松治、西川哲夫、金田佳子, We apply the method of the QCD sum rule, in which positive- and negative-parity baryons couple with each other, to the flavor-octet hyperons and investigate the parity splittings. The predicted masses of the positive- and negative-parity baryons reproduce the experimental ones fairly well in the Lambda and Sigma channels. This implies that the Lambda(1405) is not the parity partner of the Lambda and may be a flavor-singlet or exotic state. In the Xi channel, the sum rule predicts the mass of the negative-parity state to be about 1.8 GeV, which leads to two possibilities; one is that the observed state with the closest mass, Xi(1690), is the parity partner and the other is that the parity partner is not yet found but exists around 1.8 GeV.
Positive and Negative-Parity Baryons in Coupled QCD Sum Rules, Progress of Theoretical Physics Supplement 168 (2007) ,50, No. 168, 50, 53, 09 Nov. 2007, 森松 治、西川 哲夫、金田・延與 佳子
Pentaquarks in QCD Sum Rules, Progress of Theoretical Physics Supplement 168 (2007), 54, No.168 , 54, 57, 09 Nov. 2007, 西川 哲夫、森松 治、金田・延與 佳子
Strange dibaryon in the bound kaon approach to the Skyrme model, Physica E 40 (2007) 406, Volume 40, Isuue 2, 406, 409, 01 Dec. 2007, 西川哲夫
K^-pp bound states from Skyrmions, Physical Review C 77, 055202 (2008), Volume 77, Number 5, 055202, 01 Mar. 2008, 西川 哲夫
A study on the teaching in the vector of force using laboratory lever, 第二号, 24, 38, 28 Feb. 2011
Let’s understand the series connection and parallel connection of cells through the voltage, 3号, 7, 24, 29 Feb. 2012
Effects on Introducing Interactive Methods into the Information Processing Education, Bulletin of The Institute for Advancement of Teaching and Learning KOKUGKUIN UNIVERSITY, 3号, 23, 36, 10 Mar. 2012, The Institute for Advancement of Teaching and Learning, KOKUGKUIN UNIVERSITY
Let's image the flow and force of the electricity ―Effect of imaging the electric current and voltage―, 4号, 19, 30, 28 Feb. 2013
Survey methods of the information processing class for the educational improvement, JOURNAL OF HUMAN DEVELOPMENT STUDIES, 第5号, 119, 133, 28 Feb. 2014, SOCIETY OF HUMAN DEVELOPMENT, KOKUGAKUIN UNIVERSITY, 牧琢弥
A study on the singlet baryon in the QCD sum rule, JOURNAL OF HUMAN DEVELOPMENT STUDIES, 第5号, 5, 16, 28 Feb. 2014, SOCIETY OF HUMAN DEVELOPMENT, KOKUGAKUIN UNIVERSITY
Does Time Pass Equally Anytime and Anywhere?:Relativity of Simultaneity, JOURNAL OF HUMAN DEVELOPMENT STUDIES, 第7号, 165, 183, 01 Feb. 2016, 西川哲夫
Does time pass and space exist equally to anyone?―Expansion and contraction of time and space in relativity―, JOURNAL OF HUMAN DEVELOPMENT STUDIES, 第8号, 87, 103, 28 Feb. 2017, 西川哲夫
Why is it impossible to move faster than light? ― Clear derivation of velocity addition in Einstein's relativity ―, JOURNAL OF HUMAN DEVELOPMENT STUDIES, 第9号, 121, 142, 28 Feb. 2018, 西川哲夫