<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msub><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msub><mml:msup><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mo>⁎</mml:mo></mml:mrow></mml:msup><mml:mi>K</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:msub><mml:mrow><mml:mi>B</mml:mi></mml:mrow><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:m

Cerqueira, Alexandre Andrade; Rodrigues, B. Osório; Bracco, Mirian E.; Nielsen, M.

doi:10.1016/j.nuclphysa.2015.01.007

Cited by 8 publications

(4 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This method was employed to investigate couplings of ordinary heavy-heavy-light mesons in Refs. [109,110]. Form factors extracted by treating a light or one of heavy mesons off-shell may differ from each other considerably, but after extrapolating to the corresponding mass-shells give the same or negligibly different strong couplings.…”

Section: Decaysmentioning

confidence: 99%

Four-quark exotic mesons

Agaev¹,

Azizi²,

Sundu³

2020

Turk J Phys

View full text Add to dashboard Cite

We review our investigations devoted to the analysis of the resonances Zc(3900) , Zc(4430) , Zc(4100) , X(4140) , X(4274) , a1(1420) , Y (4660) , X(2100) , X(2239) , and Y (2175) discovered in various processes by Belle, BaBar, BESIII, D0, CDF, CMS, LHCb and COMPASS collaborations. These resonances are considered as serious candidates to four-quark (tetraquark) exotic mesons. We treat all of them as diquark-antidiquark states with relevant spin-parities, find their masses and couplings, as well as explore their dominant strong decay channels. Calculations are performed in the context of the QCD sum rule method. Thus, the spectroscopic parameters of the tetraquarks are evaluated using the two-point sum rules. For computations of the strong couplings GT M 1 M 2 , corresponding to the vertices T M1M2 and necessary to find the partial widths of the strong decays T → M1M2 , we employ either the three-point or full/approximate versions of the QCD light-cone sum rules methods. Obtained results are compared with available experimental data, and with predictions of other theoretical studies.

show abstract

Section: Decaysmentioning

confidence: 99%

Four-quark exotic mesons

Agaev¹,

Azizi²,

Sundu³

2020

Turk J Phys

View full text Add to dashboard Cite

show abstract

“…Therefore, no error estimate is give for these mesons, whereas the theoretical errors for the remaining meson masses are due to a certain insensitivity of the computed pion and kaon masses with respect to ω u and ω s . The origins of theoretical errors and the choice of current-quark masses at the renormalization scale µ in the DSE (53) are discussed in detail in Ref. [19].…”

Section: Pos(charm2020)025mentioning

confidence: 99%

Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences

El-Bennich¹,

Serna²

2021

Proceedings of 10th International Workshop on Charm Physics — PoS(CHARM2020)

View full text Add to dashboard Cite

We review heavy quark flavor and spin symmetries, their exploitation in heavy meson effective theories and the flavored couplings of charmed and light mesons in the definition of their effective Lagrangians. We point out how nonperturbative continuum QCD approaches based on Dyson-Schwinger and Bethe-Salpeter equations can be used to calculate strong and leptonic decays of open-charm mesons and heavy quarkonia. The strong decay D * → Dπ serves as a benchmark, as it is the only physical open-charm observable that can be related to the effective Lagrangian's couplings. Nonetheless, a quantitative comparison of D * Dπ, ρDD, ρD * D and ρD * D * couplings for a range of off-shell momenta of the ρ-meson invalidates SU(4) F symmetry relations between these couplings. Thus, besides the breaking of flavor symmetry by mass terms in the Lagrangians, the flavor-symmetry breaching in couplings and their dependence on the ρ-meson virtuality cannot be ignored. We also take the opportunity to present new results for the effective J/ψDD and J/ψD * D couplings. We conclude this contribution with a discussion on how the description of pseudoscalar and vector D, D s , B and B s meson properties can be drastically improved with a modest modification of the flavor-dependence in the Bethe-Salpeter equation.

show abstract

“…Whatever modifications we apply to the DSE kernel must have repercussions in the BSE. To this end, the effect of the ansatz (56) that preserves the axWTI ( 52) can be studied by inserting the DSE (53) as well as the axialvector and pseudoscalar vertices given by,…”

Section: Poincaré Covariance In Bound-state Description Of Heavy Mesonsmentioning

confidence: 99%

“…Relative deviations as in Table 3. and the choice of current-quark masses at the renormalization scale 𝜇 in the DSE (53) are discussed in detail in Ref. [19].…”

Section: Poincaré Covariance In Bound-state Description Of Heavy Mesonsmentioning

confidence: 99%

Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences

El-Bennich,

Serna

2021

Preprint

View full text Add to dashboard Cite

We review heavy quark flavor and spin symmetries, their exploitation in heavy meson effective theories and the flavored couplings of charmed and light mesons in the definition of their effective Lagrangians. We point out how nonperturbative continuum QCD approaches based on Dyson-Schwinger and Bethe-Salpeter equations can be used to calculate strong and leptonic decays of open-charm mesons and heavy quarkonia. The strong decay 𝐷 * → 𝐷𝜋 serves as a benchmark, as it is the only physical open-charm observable that can be related to the effective Lagrangian's couplings. Nonetheless, a quantitative comparison of 𝐷 * 𝐷𝜋, 𝜌𝐷𝐷, 𝜌𝐷 * 𝐷 and 𝜌𝐷 * 𝐷 * couplings for a range of off-shell momenta of the 𝜌-meson invalidates SU(4) 𝐹 symmetry relations between these couplings. Thus, besides the breaking of flavor symmetry by mass terms in the Lagrangians, the flavor-symmetry breaching in couplings and their dependence on the 𝜌-meson virtuality cannot be ignored. We also take the opportunity to present new results for the effective 𝐽/𝜓𝐷𝐷 and 𝐽/𝜓𝐷 * 𝐷 couplings. We conclude this contribution with a discussion on how the description of pseudoscalar and vector 𝐷, 𝐷 𝑠 , 𝐵 and 𝐵 𝑠 meson properties can be drastically improved with a modest modification of the flavor-dependence in the Bethe-Salpeter equation.

show abstract

BsB⁎K and Bs

Cited by 8 publications

References 18 publications

Four-quark exotic mesons

Four-quark exotic mesons

Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences

Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences

Contact Info

Product

Resources

About