Vector and axial-vector couplings of D and D⁎ mesons in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mn>2</mml:mn><mml:mo>+</mml:mo><mml:mn>1</mml:mn></mml:math> flavor lattice QCD

Can, Kadir Utku; Erkol, Güray; Oka, M.; Özpineci, A.; Takahashi, Tôru

doi:10.1016/j.physletb.2012.12.050

Cited by 64 publications

(50 citation statements)

References 42 publications

(31 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We display input parameters for the numerical results: m π = 0.139 GeV, the mass difference δ = 0.142 GeV, f π = 0.086 GeV, and renormalization scale µ = 4π f . There are many works investigating the constant for D ( * ) D ( * ) π coupling such as the lattice study [92][93][94], QCD sum rule [95][96][97][98][99], and other approaches [100][101][102]. The experimental process D * → Dπ is fit to obtain the renormalized coupling g (2) [103], and we get the bare coupling g = 0.65 by using the O(ǫ 2 ) correction in Eq.…”

Section: Numerical Results Of Potentials In Momentum Spacementioning

confidence: 99%

DD* potentials in chiral effective field theory and possible molecular states

Wang

Liu

et al. 2019

Phys. Rev. D

View full text Add to dashboard Cite

The DD * potentials are studied within the framework of heavy meson chiral effective field theory. We have obtained the effective potentials of the DD * system up to O(ǫ 2 ) at one loop level. In addition to the one-pion exchange contribution, the contact and two-pion exchange interactions are also investigated in detail. Furthermore, we have searched for the possible molecular states by solving Schrödinger equation with the potentials. We notice that the contact and two-pion exchange potentials are non-negligible numerically and important for the existence of a bound state. In our results, no bound state is founded in the I = 0 channel within a wide range of cutoff parameter, while there exists a bound state in the I = 1 channel as cutoff is near m ρ in our approach.

show abstract

Section: Numerical Results Of Potentials In Momentum Spacementioning

confidence: 99%

DD* potentials in chiral effective field theory and possible molecular states

Wang

Liu

et al. 2019

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…The error on the fit input r 1 f π includes the uncertainties from both f ¼ 0.55ð6Þ [71]. Based on these results, we constrain the coupling in our fit to be…”

Section: ð7:23þmentioning

confidence: 96%

Short-distance matrix elements for D0 -meson mixing from Nf=2+1 lattice QCD

et al. 2018

View full text Add to dashboard Cite

We calculate in three-flavor lattice QCD the short-distance hadronic matrix elements of all five ΔC ¼ 2 four-fermion operators that contribute to neutral D-meson mixing both in and beyond the Standard Model. We use the MILC Collaboration's N f ¼ 2 þ 1 lattice gauge-field configurations generated with asqtadimproved staggered sea quarks. We also employ the asqtad action for the valence light quarks and use the clover action with the Fermilab interpretation for the charm quark. We analyze a large set of ensembles with pions as light as M π ≈ 180 MeV and lattice spacings as fine as a ≈ 0.045 fm, thereby enabling good control over the extrapolation to the physical pion mass and continuum limit. We obtain for the matrix elements in theMS-NDR scheme using the choice of evanescent operators proposed by Beneke et al., evaluated at 3 GeV, hD 0 jO i jD 0 i ¼ f0.0805ð55Þð16Þ; −0.1561ð70Þð31Þ; 0.0464ð31Þð9Þ; 0.2747ð129Þð55Þ; 0.1035ð71Þð21Þg GeV 4 (i ¼ 1-5). The errors shown are from statistics and lattice systematics, and the omission of charmed sea quarks, respectively. To illustrate the utility of our matrix-element results, we place bounds on the scale of CP-violating new physics in D 0 mixing, finding lower limits of about 10-50 × 10 3 TeV for couplings of Oð1Þ. To enable our results to be employed in more sophisticated or model-specific phenomenological studies, we provide the correlations among our matrix-element results. For convenience, we also present numerical results in the other commonly used scheme of Buras, Misiak, and Urban.

show abstract

“…Therefore, it cannot be directly compared to form factors that represent the whole charge distribution of a certain composite particle, such as the Sachs electric, magnetic, or quadrupole form factors that have been used in lattice QCD calculations, as for instance in Ref. [39]. For a detailed treatment of the form factor, see Ref.…”

Section: The Modelmentioning

confidence: 99%

On the Origin of the \(Y(4260)\)

Coito

Giacosa

2020

Acta Phys. Pol. B

View full text Add to dashboard Cite

We study the relation between the ψ(4160) and the Y (4260) within an unitarized effective Lagrangian approach. The Y (4260) arises as a manifestation of the ψ(4160), when a loop-driven decay of the type of ψ(4160) → D * sD * s → J/ψf 0 (980) is enhanced by the proximity of the pole, corresponding to the ψ(4160), to the almost closed D * sD * s decay channel. Other f 0 resonances that may add a non-negligible contribution, by the same mechanism, are not included for simplicity, but they are not expected to change the main conclusion. Within this picture, the Y (4260) is not, therefore, an independent resonance, but rather a variation of the ψ(4160), which also explains why it is not seen in OZI-allowed decay channels in the experiment.

show abstract

Vector and axial-vector couplings of D and D⁎ mesons in 2+1 flavor lattice QCD

Cited by 64 publications

References 42 publications

DD* potentials in chiral effective field theory and possible molecular states

DD* potentials in chiral effective field theory and possible molecular states

Short-distance matrix elements for D0 -meson mixing from Nf=2+1 lattice QCD

On the Origin of the \(Y(4260)\)

Contact Info

Product

Resources

About