Odd-intrinsic-parity processes within the resonance effective theory of QCD

Ruiz-Femenía, Pedro; Pich, Antonio; Portolés, Jorge

doi:10.1088/1126-6708/2003/07/003

Cited by 139 publications

(307 citation statements)

References 27 publications

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“…6.c, 6.d and 6.f. Obviously, these are not the only interactions bilinear in the resonance fields even at large-N C [17,18,40,41]. Therefore, it is not surprising that our calculation is unable to find the correct behaviour at large energies for those contributions with two intermediate resonances.…”

Section: Behaviour At Large Energiesmentioning

confidence: 84%

“…A useful generalization is the Minimal Hadronic Ansatz, which keeps the minimum number of resonances compatible with all known short-distance constraints for the problem at hand [15]. The resonance contributions to some O(p 6 ) χPT couplings have been already analyzed in this way, by studying an appropriate set of three-point functions [16][17][18]. The N C → ∞ limit of the resonance chiral theory (RχT) has been investigated in many works [8,9,11,[13][14][15][16][17][18] and a very successful leading order phenomenology already exists [11].…”

Section: Introductionmentioning

confidence: 99%

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Quantum Loops in the Resonance Chiral Theory: The Vector Form-Factor

Rosell

Sanz-Cillero

Pich

2004

J. High Energy Phys.

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172

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We present a calculation of the Vector Form Factor at the next-to-leading order in the 1/N C expansion, within the framework of Resonance Chiral Theory. The calculation is performed in the chiral limit, and with two dynamical quark flavours. The ultraviolet behaviour of quantum loops involving virtual resonance propagators is analyzed, together with the kind of counterterms needed in the renormalization procedure. Using the lowest-order equations of motion, we show that only a few combinations of local couplings appear in the final result. The low-energy limit of our calculation reproduces the standard Chiral Perturbation Theory formula, allowing us to determine the resonance contribution to the chiral low-energy couplings, at the next-to-leading order in 1/N C , keeping a full control of their renormalization scale dependence.

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Section: Behaviour At Large Energiesmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Quantum Loops in the Resonance Chiral Theory: The Vector Form-Factor

Rosell

Sanz-Cillero

Pich

2004

J. High Energy Phys.

Self Cite

172

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“…Other parameters related to the heavier vector multiplet d m , d M , d s , will be fit later. Due to the inclusion of the new vector multiplet, some of the well established constraints in [15], such as d 1 + 8d 2 , d 3 , will get corrections [22]. However, since the combination of d 1 + 8d 2 is the coefficient of the mass of pseudoGoldstone mesons, the final results should be rather insensitive to the value of this combination.…”

Section: Phenomenological Discussionmentioning

confidence: 99%

“…The interaction operators containing two multiplets of resonances have also been written down in [15][16]:…”

Section: Theoretical Frame For Tau Decaysmentioning

confidence: 99%

Study ofτ−→VP−ντin the framework of resonance chiral theory

Guo

2008

Phys. Rev. D

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In this paper we study two kinds of τ decays:which belong to ∆S = 0 processes and (b) ∆S = 1 processes, like τ − → (ρ 0 K − , ωK − , φK − , K * 0 π − )ν τ , in the framework of resonance chiral theory (RχT). We fit the τ − → ωπ − ν τ spectral function and the invariant mass distribution of ωK in the process of τ − → ωK − ν τ to get the values of unknown resonance couplings. Then we make a prediction for branching ratios of all channels.

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“…There has been a lot of recent activity to determine the chiral LECs from theory, using as much as possible QCD information [23][24][25][26][27][28][29][30][31][32]. This strong effort is motivated by the precision required in present phenomenological applications, which makes necessary to include corrections of O(p 6 ) where the huge number of unknown couplings are the major source of theoretical uncertainty.…”

Section: Introductionmentioning

confidence: 99%

From Hadronic τ Decays to the Chiral Couplings and

González–Alonso

Pich

Prades

2009

Nuclear Physics B - Proceedings Supplements

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A sum rule analysis of the hadronic τ -decay data can be used to determine the low-energy constants L r 10 (µ) and C r 87 (µ). These constants are QCD chiral-order parameters, which appear at order p 4 and p 6 , respectively, in the chiral perturbation theory expansion of the V −A correlator. At order p 4 we obtain L r 10 (Mρ) = −(5.22±0.06)·10 −3 . Including in the analysis the order p 6 contributions, we get L r 10 (Mρ) = −(4.06 ± 0.39) · 10 −3 and C r 87 (Mρ) = (4.89 ± 0.19) · 10 −3 GeV −2 .

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Odd-intrinsic-parity processes within the resonance effective theory of QCD

Cited by 139 publications

References 27 publications

Quantum Loops in the Resonance Chiral Theory: The Vector Form-Factor

Quantum Loops in the Resonance Chiral Theory: The Vector Form-Factor

Study ofτ−→VP−ντin the framework of resonance chiral theory

From Hadronic τ Decays to the Chiral Couplings and

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