Form factors of heavy mesons in QCD

Shifman, M.; Vysotsky, M. I.

doi:10.1016/0550-3213(81)90023-7

Cited by 120 publications

(119 citation statements)

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“…Thirty years ago, Shifman et al [61] had calculated h → J/ψγ to NLO of α s in color singlet model which is equivalent to the NRQCD calculation. The NLO prediction for h → J/Ψγ, that we quote from eq.…”

Section: Jhep06(2014)121mentioning

confidence: 99%

The leading twist light-cone distribution amplitudes for the S-wave and P-wave quarkonia and their applications in single quarkonium exclusive productions

Wang

Yang

2014

J. High Energ. Phys.

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In this paper, we calculate twist-2 light-cone distribution amplitudes (LCDAs) of the S-wave and P-wave quarkonia (namely 1 S 0 state η Q , 3 S 1 state J/ψ(Υ), 1 P 1 state h Q and 3 P J states χ QJ with J = 0, 1, 2 and Q = c, b) to the next-leading order of the strong coupling α s and leading order of the velocity expansion v in the non-relativistic QCD (NRQCD). We apply these LCDAs to some single quarkonium exclusive productions at large center-of-mass energy, such as γ * → η Q γ, χ QJ γ (J = 0, 1, 2), Z → η Q γ, χ QJ γ (J = 0, 1, 2), J/ψ(Υ)γ, h Q γ and h → J/ψγ, by adopting the collinear factorization. The asymptotic behaviors of those processes obtained in NRQCD factorization are reproduced.

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Section: Jhep06(2014)121mentioning

confidence: 99%

The leading twist light-cone distribution amplitudes for the S-wave and P-wave quarkonia and their applications in single quarkonium exclusive productions

Wang

Yang

2014

J. High Energ. Phys.

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“…Adding up different pieces together, we obtain the one-loop QCD correction to the four-point QCD matrix element as follows 27) JHEP05 (2018)184 where the explicit expression of the NLO hard amplitude is given by…”

Section: Jhep05(2018)184mentioning

confidence: 99%

“…The explicit expression of the one-loop evolution kernel V 0 is given by [26,27] 42) where the plus function is defined as…”

Section: Jhep05(2018)184mentioning

confidence: 99%

Subleading-power corrections to the radiative leptonic B → γℓν decay in QCD

Wang

Shen

2018

J. High Energ. Phys.

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Applying the method of light-cone sum rules with photon distribution amplitudes, we compute the subleading-power correction to the radiative leptonic B → γ ν decay from the twist-two hadronic photon contribution at next-to-leading order in QCD; and further evaluate the higher-twist "resolved photon" corrections at leading order in α s , up to twist-four accuracy. QCD factorization for the vacuum-to-photon correlation function with an interpolating current for the B-meson is established explicitly at leading power in Λ/m b employing the evanescent operator approach. Resummation of the parametrically large logarithms of m 2 b /Λ 2 entering the hard function of the leading-twist factorization formula is achieved by solving the QCD evolution equation for the light-ray tensor operator at two loops. The leading-twist hadronic photon effect turns out to preserve the symmetry relation between the two B → γ form factors due to the helicity conservation, however, the higher-twist hadronic photon corrections can yield symmetry-breaking effect already at tree level in QCD. Using the conformal expansion of photon distribution amplitudes with the non-perturbative parameters estimated from QCD sum rules, the twist-two hadronic photon contribution can give rise to approximately 30% correction to the leading-power "direct photon" effect computed from the perturbative QCD factorization approach. In contrast, the subleading-power corrections from the higher-twist two-particle and three-particle photon distribution amplitudes are estimated to be of O(3 ∼ 5%) with the light-cone sum rule approach. We further predict the partial branching fractions of B → γ ν with a photonenergy cut E γ ≥ E cut , which are of interest for determining the inverse moment of the leading-twist B-meson distribution amplitude thanks to the forthcoming high-luminosity Belle II experiment at KEK.

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“…In addition to the radiative corrections the first order relativistic corrections to the process e + e − → η c + γ were considered in paper [6]. The only process considered within LC is e + e − → η c + γ [7,8]. The main drawback of these papers is that the authors used very simple model of DA of the η c meson, which doesn't take into account relativistic motion in this meson.…”

Section: Introductionmentioning

confidence: 99%

ExclusiveC=+charmonium production ine+e−→H+γat
Брагута
¹

2010
Phys. Rev. D

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Exclusive C = + charmonium production in e + e − → H + γ at B-factories within light cone formalism.V.V. Braguta 1, * 1 Institute for High Energy Physics, Protvino, RussiaIn this paper the cross sections of the processes e + e − → H + γ, H = ηc, η ′ c , χc0, χc1, χc2 are calculated. The calculation is carried out at the leading twist approximation of light cone formalism. Within this approach the leading logarithmic radiative and relativistic corrections to the amplitudes are resumed. For the processes e + e − → ηc, η ′ c + γ one loop radiative corrections are taken into account. It is also shown that one loop leading logarithmic radiative corrections calculated within light cone formalism for the processes under study coincide with that obtained by direct calculations of one loop diagrams within nonrelativistic QCD.

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Form factors of heavy mesons in QCD

Cited by 120 publications

References 17 publications

The leading twist light-cone distribution amplitudes for the S-wave and P-wave quarkonia and their applications in single quarkonium exclusive productions

The leading twist light-cone distribution amplitudes for the S-wave and P-wave quarkonia and their applications in single quarkonium exclusive productions

Subleading-power corrections to the radiative leptonic B → γℓν decay in QCD

ExclusiveC=+charmonium production ine+e−→H+γat
Брагута
¹

2010
Phys. Rev. D

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Form factors of heavy mesons in QCD

Cited by 120 publications

References 17 publications

The leading twist light-cone distribution amplitudes for the S-wave and P-wave quarkonia and their applications in single quarkonium exclusive productions

The leading twist light-cone distribution amplitudes for the S-wave and P-wave quarkonia and their applications in single quarkonium exclusive productions

Subleading-power corrections to the radiative leptonic B → γℓν decay in QCD

ExclusiveC=+charmonium production ine+e−→H+γatБрагута1 2010Phys. Rev. D

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ExclusiveC=+charmonium production ine+e−→H+γat
Брагута
¹

2010
Phys. Rev. D