Study of leading twist light cone wave functions of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>J</mml:mi><mml:mo>/</mml:mo><mml:mi>Ψ</mml:mi></mml:math>meson

Брагута, В. В.

doi:10.1103/physrevd.75.094016

Cited by 64 publications

(121 citation statements)

References 41 publications

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“…The second problem is poor knowledge of charmonia DAs, which are the key ingredient of any calculation done within LC. Recently, the leading twist DAs of the S-wave charmonia mesons have become the objects of intensive study [19,31,32,33,34,35,36,37,38]. Knowledge about these DAs allowed one to build some models for the S-wave charmonia DAs, that can be used in practical calculations.…”

Section: Introductionmentioning

confidence: 99%

Double charmonium production atBfactories within light cone formalism

Брагута

2009

Phys. Rev. D

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′ c within light cone formalism. It is shown that if one disregards the contribution of higher fock states, the twist-3 distribution amplitudes needed in the calculation can be unambiguously determined from the twist-2 distribution amplitudes and equations of motion. Using models of the twist-2 distribution amplitudes the cross sections of the processes under study have been calculated. The results of the calculation are in agreement with Belle and BaBar experiments. It is also shown that relativistic and radiative corrections to the cross sections play crucial role in the achievement of the agreement between the theory and experiments. The comparison of the results of this paper with the results obtained in other papers has been carried out. In particular, it is shown that the results of papers where relativistic and radiative corrections were calculated within NRQCD are overestimated by a factor of ∼ 1.5.

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Section: Introductionmentioning

confidence: 99%

Double charmonium production atBfactories within light cone formalism

Брагута

2009

Phys. Rev. D

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“…[33,[36][37][38], and the relations between the moments of LCDAs for heavy quarkonia and NRQCD matrix elements are known [39][40][41][42]. However, the factorization is only discussed at leading order of the velocity expansion v. In fact, the relativistic corrections are also important for the calculation of LCDAs of quarkonium and B c meson.…”

Section: Jhep12(2017)012mentioning

confidence: 99%

Relativistic corrections to light-cone distribution amplitudes of S-wave Bc mesons and heavy quarkonia

Wang

Yang

et al. 2017

J. High Energ. Phys.

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In collinear factorization, light-cone distribution amplitudes (LCDAs) are key ingredients to calculate the production rate of a hadron in high energy exclusive processes. For a doubly-heavy meson system (such as B c , J/ψ, Υ etc), the LCDAs contain perturbative scales that can be integrated out and then are re-factorized into products of perturbatively calculable distribution parts and non-relativistic QCD matrix elements. In this re-factorization scheme, the LCDAs are known at next-to-leading order in the strong coupling constant α s and at leading order in the velocity expansion. In this work, we calculate the O(v 2 ) corrections to twist-2 LCDAs of S-wave B c mesons. These results are applicable to heavy quarkonia like η c,b , J/ψ and Υ by setting m b = m c . We apply these relativistically corrected LCDAs to study their inverse moments and a few Gegenbauer moments which are important for phenomenological study. We point out that the relativistic corrections are sizable, and comparable with the next-to-leading order radiative corrections. These results for LCDAs are useful in future theoretical analyses of the productions of heavy quarkonia and B c mesons.

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“…Thus, there must be connections between the LCDAs of quarkonia and NRQCD matrix elements. For examples, in [20][21][22], the authors try to constrain their models for the LCDAs of quarkonia by relating the moments of LCDAs with the local NRQCD matrix elements; in [23,24], the authors calculated the leading twist LCDAs of the S-wave quarkonia within the NRQCD framework, and express the LCDAs in form of the product of perturbatively calculable distribution part and lowest order NRQCD matrix-element.…”

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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Study of leading twist light cone wave functions of theJ/Ψmeson

Cited by 64 publications

References 41 publications

Double charmonium production atBfactories within light cone formalism

Double charmonium production atBfactories within light cone formalism

Relativistic corrections to light-cone distribution amplitudes of S-wave Bc mesons and heavy quarkonia

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

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