hidden local symmetry at loops
DESCRIPTION
Hidden Local Symmetry at Loops. An Effective Field Theory for QCD. Masayasu Harada (Nagoya Univ.). at University of Tokyo. based on (mainly) M.H. and K.Yamawaki, Phys. Rept. 381, 1 (2003). Other related references. M.Bando, T.Kugo and K.Yamawaki, Phys. Rept. 164 , 217 (1988) - PowerPoint PPT PresentationTRANSCRIPT
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Masayasu Harada (Nagoya Univ.)
based on (mainly)
M.H. and K.Yamawaki, Phys. Rept. 381, 1 (2003)
at University of Tokyo
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Other related references
• M.Bando, T.Kugo and K.Yamawaki, Phys. Rept. 164, 217 (1988)
• M.H. and K.Yamawaki, Phys. Lett. B 297, 151 (1992)
• M.H., T.Kugo and K.Yamawaki, Phys. Rev. Lett. 71, 1299 (1993)
• M.H., T.Kugo and K.Yamawaki, Prog. Theor. Phys. 91, 801 (1994)
• M.H. and A.Shibata, Phys. Rev. D 55, 6716 (1997)
• M.H. and K.Yamawaki, Phys. Rev. Lett. 83, 3374 (1999)
• M.H. and K.Yamawaki, Phys. Rev. D 64, 014023 (2001)
• M.H. and K.Yamawaki, Phys. Rev. Lett. 86, 757 (2001)
• M.H. and K.Yamawaki, Phys. Rev. Lett. 87, 152001 (2001)
• M.H. and C.Sasaki, Phys. Lett. B 537, 280 (2002)
• M.H., Y.Kim and M.Rho, Phys. Rev. D 66, 016003 (2002)
• M.H., Y.Kim, M.Rho and C.Sasaki, Nucl. Phys. A 727, 437 (2003)
• M.H., M.Tanabashi and K.Yamawaki, Phys. Lett. B 568 103 (2003)
• M.H. and C.Sasaki, hep-ph/0304282
• C.Sasaki, hep-ph/030600
• M.H., Y.Kim, M.Rho and C.Sasaki, hep-ph/0308237
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Q C D
Low Energy hadron Phenomena
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E
αs
Asymptotic freedom
☆ Difficulty ?
QCD ・・・ Strong Coupling Gauge Theory
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Limit of Parameters & Symmetry Properties in QCD
Perturbative QCD
Heavy Quark Symmetry
(asymptotic freedom)
Chiral Symmetry
Theory of weakly interacting mesons
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☆ QCD → Effective Field Theories
Chiral Symmetry
E
αs
Effective
Field
Theory
based on
chiral symmetry
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EFT for π ☆ Chiral Perturbation Theory
based on chiral symmetry of QCD
P-wave ππ scattering
J. Gasser and H. Leutwyler, Annals Phys. 158, 142 (1984); NPB 250, 517 (1985)
1-loop
tree
too many parameters !!
determine from QCD
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☆ matching between EFT and QCD (T=μ=0)
QCD quarks and gluons
Bare theory
EFT for hadrons
bare parameters
Quantum effects
Quantum theory
physical quantities
matchingΛ
high energy
low energy
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EFT for π ☆ Chiral Perturbation Theory
matching to QCD Λ⇒ ~ 1 GeV
P-wave ππ scattering
J. Gasser and H. Leutwyler, Annals Phys. 158, 142 (1984); NPB 250, 517 (1985)
1-loop
tree
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☆ Hidden Local SymmetryEFT for π and ρ
M. Bando, T. Kugo, S. Uehara, K. Yamawaki and T. Yanagida, PRL 54 1215 (1985)
M. Bando, T. Kugo and K. Yamawaki, Phys. Rept. 164, 217 (1988)
based on chiral symmetry of QCD
ρ gauge boson of HLS
works well for E ~ mρ
reduces to chiral Lagrangian for E ≪ mρ
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HLS at tree level
equivalent !!
Other models for vector meson
◎ Matter field method
◎ Massive Yang-Mills method
◎ Anti-symmetric tensor field method
(tree level)
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☆ Chiral Perturbation Theory with HLSH.Georgi, PRL 63, 1917 (1989); NPB 331, 311 (1990):
M.Tanabashi, PLB 316, 534 (1993):
M.H. and K.Yamawaki, PRD 64, 014023 (2001)
Systematic low-energy expansion E ~ mρ
loop expansion ⇔ derivative expansion
Applicable for E 1.2 GeV≦
Phenomena for E > mρ
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☆ Matching HLS with QCDM.H. and K.Yamawaki, PRD 64, 014023 (2001)
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QCD ⇔ HLS
One can study QCD in other conditions
(N > 3)f
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Outline
1. Introduction
2. Spontaneous Symmetry Breaking
and Effective Field Theory
3. Brief Review of Chiral Perturbation Theory
4. Hidden Local Symmetry (HLS)
5. Chiral Perturbation Theory with HLS
6. Wilsonian Matching
7. Vector Manifestation (in large flavor QCD)
8. HLS in Hot and/or Dense Matter
9. Vector Manifestation in Hot and/or Dense Matter
10. Effects of Lorentz Violation at Bare Level
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