Study of the 
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 decays with perturbative QCD approach

Sun, J. F.; Yang, Yueling; Chang, Qin; Wang, Na; Lu, G. R.; Huang, Jinshu

doi:10.1103/physrevd.96.036010

Cited by 12 publications

(25 citation statements)

References 57 publications

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“…This results fromG u i =G d i in ρ + . For a comparison to the unpolarized case, we note that, for the unpolarized GPDs [11], there is an overall minus sign difference w.r.t. Eq.…”

Section: Polarized Gpds and Our Modelmentioning

confidence: 99%

“…where ρ µ is the ρ meson field, f ρ is the ρ decay constant (which may be absorbed in the normalization factor N ), and Γ µ is a Bethe-Salpeter amplitude (BSA) [11,39],…”

Section: Polarized Gpds and Our Modelmentioning

confidence: 99%

“…2. N is the normalization constant, m and m R are the constituent quark and the regulator masses, respectively, and M i,f are the kinematic invariant masses, [11,39]…”

Section: Polarized Gpds and Our Modelmentioning

confidence: 99%

“…To keep the mass square positive, as Refs. [11,39], we directly replace 1 − x ′ with x ′ − 1 in Eq. (36) and get…”

Section: Polarized Gpds and Our Modelmentioning

confidence: 99%

“…The sum rules of the unpolarized GPDs can give the charge G C , magnetic G M , and quadrupole G Q form factors. We have intensively studied those observables with a help of a light-front constituent quark model for the ρ meson phenomenologically [11], where the ρ meson form factors G C,M,Q (Q 2 ), mean square charge radius, magnetic and quadrupole moments are calculated. Our obtained results are reasonably compatible with the previous model calculations and the experimental data [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Polarized generalized parton distributions and structure functions of the ρ meson

Sun

Dong

2019

Phys. Rev. D

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“…This results fromG u i =G d i in ρ + . For a comparison to the unpolarized case, we note that, for the unpolarized GPDs [11], there is an overall minus sign difference w.r.t. Eq.…”

Section: Polarized Gpds and Our Modelmentioning

confidence: 99%

“…where ρ µ is the ρ meson field, f ρ is the ρ decay constant (which may be absorbed in the normalization factor N ), and Γ µ is a Bethe-Salpeter amplitude (BSA) [11,39],…”

Section: Polarized Gpds and Our Modelmentioning

confidence: 99%

“…2. N is the normalization constant, m and m R are the constituent quark and the regulator masses, respectively, and M i,f are the kinematic invariant masses, [11,39]…”

Section: Polarized Gpds and Our Modelmentioning

confidence: 99%

“…To keep the mass square positive, as Refs. [11,39], we directly replace 1 − x ′ with x ′ − 1 in Eq. (36) and get…”

Section: Polarized Gpds and Our Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Polarized generalized parton distributions and structure functions of the ρ meson

Sun

Dong

2019

Phys. Rev. D

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ρ-Meson properties in medium

Melo

Tsushima

2019

Physics Letters B

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Properties of ρ-meson in symmetric nuclear matter are investigated in a light-front constituent quark model (LFCQM), using the in-medium inputs calculated by the quark-meson coupling (QMC) model. The LFCQM used in this study was already applied for the studies of the electromagnetic properties of ρ-meson in vacuum, namely, the charge G 0 , magnetic G 1 , and quadrupole G 2 form factors, electromagnetic charge radius, and electromagnetic decay constant. Using the two different density dependence of the regulator mass in medium, we predict that the charge radius, and quadrupole moment are enhanced as increasing the nuclear matter density, while the magnetic moment is slightly quenched. Furthermore, we predict the value Q 2 zero , which crosses zero of the charge form factor, G 0 (Q 2 zero ) = 0 (Q 2 = −q 2 > 0 with q being the four-momentum transfer), decreases as increasing the nuclear matter density by the two different density dependence of the regulator mass. On the other hand, for the electromagnetic decay constant of the ρ-meson, the two different density dependence of the regulator mass predict the opposite density dependence. Namely, as increasing the nuclear matter density, the naive treatment with the density independent regulator mass as in the vacuum, predicts the increase of the decay constant, while the other that assumes the same density dependence of the regulator mass as that of the in-medium constituent quark mass, predicts the decrease of the decay constant. Thus, although the other physical quantities are predicted to have similar density dependence by the two different density dependence of the regulator mass applied, the density dependence of the ρ-meson electromagnetic decay constant are predicted to have opposite density dependence, and the facts suggest that the in-medium ρ-meson decay constant needs to be investigated further in the future.

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Unambiguous extraction of the electromagnetic form factors for spin-1 particles on the light-front

Melo

2019

Physics Letters B

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The electromagnetic form factors of a composite vector particle within the lightfront formulation of the Mandelstam formula is investigated. In order to extract the form factors from the matrix elements of the plus component of the current in the Drell-Yan frame, where the momentum transfer is chosen such that q + = q 0 +q 3 = 0, one has in principle the freedom to choose between different linear combinations of matrix elements of the current operator. The different prescriptions to calculate the electromagnetic form factors, G 0 , G 1 and G 2 , i.e.; charge form factor, magnetic and quadrupole respectively. If the covariance is respected, all prescriptions give the same results; misfortune, is not the situation; the light-front approach produce different results, which depend of the prescriptions as utilized to extract the electromagnetic form factors in the case of the spin-1 particles. The main differences of the prescriptions appear because of the light-front matrix elements of the electromagnetic current are contaminated by the zero-modes contributions to the same with the plus component of the matrix elements of the electromagnetic current. However, the Inna Grach prescription is immune to the zero-modes contributions to the electromagnetic current, then the electromagnetic form factors extracted with that prescriptions do not have zero-modes contribution and give the same result compared with the instant form quantum field theory. Another's prescriptions with the light-front approach are contaminated by the zero-modes contributions to the matrix elements of the electromagnetic current with the plus component of the current. With some relations between the electromagnetic matrix elements of the electromagnetic current J + ji , as demonstrated analytical here, it was possible to calculate the electromagnetic form factors for spin-1 particles without zero-modes or non-valence contributions.

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Study of the B¯q*→DM decays with perturbative QCD approach

Cited by 12 publications

References 57 publications

Polarized generalized parton distributions and structure functions of the ρ meson

Polarized generalized parton distributions and structure functions of the ρ meson

ρ-Meson properties in medium

Unambiguous extraction of the electromagnetic form factors for spin-1 particles on the light-front

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