QCD sum rules for masses of excited heavy mesons

Dai, Yong; Huang, Chao-Shang; Huang, Ming-Qiu; Li, Chun

doi:10.1016/s0370-2693(96)01412-8

Cited by 63 publications

(118 citation statements)

References 17 publications

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“…[299,300,301,302,49]. It can also be applied in the framework of heavy quark effective theory [303,304,305] to study heavy mesons [306,307,308,309,310,311,312,313,314,315,316,317] and heavy baryons [318,319,320,321,322,323,324,325,326,327,328,329].…”

Section: A Short Introduction To the Methods Of Qcd Sum Rulementioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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In the past decade many charmonium-like states were observed experimentally. Especially those charged charmoniumlike Z c states and bottomonium-like Z b states can not be accommodated within the naive quark model. These charged Z c states are good candidates of either the hidden-charm tetraquark states or molecules composed of a pair of charmed mesons. Recently, the LHCb Collaboration discovered two hidden-charm pentaquark states, which are also beyond the quark model. In this work, we review the current experimental progress and investigate various theoretical interpretations of these candidates of the multiquark states. We list the puzzles and theoretical challenges of these models when confronted with the experimental data. We also discuss possible future measurements which may distinguish the theoretical schemes on the underlying structures of the hidden-charm multiquark states.

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Section: A Short Introduction To the Methods Of Qcd Sum Rulementioning

confidence: 99%

The hidden-charm pentaquark and tetraquark states

et al. 2016

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“…This procedure may help to reduce the uncertainties in the calculation. For other HQET parameters we use the following values obtained by QCD sum rules [30][31][32][33]:…”

Section: Numerical Results and Implications For B Decaysmentioning

confidence: 99%

“…The proper interpolating current J α 1 ···α j j,P,j ℓ for the state with arbitrary quantum number j, P , j ℓ in HQET was given in [30]. These currents have nice properties.…”

Section: Qcd Sum Rules For Isgur-wise Functions η Ke and η Imentioning

confidence: 99%

Subleading Isgur-Wise form factors andO(1/mQ)corrections to the semileptonic decaysB
Huang
¹
,
Dai
²

2001
Phys. Rev. D
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Exclusive semileptonic decays B → D 1 (2420)ℓν and B → D * 2 (2460)ℓν are studied at the subleading order of the heavy quark expansion. The subleading Isgur-Wise functions resulted from the kinetic energy and chromomagnetic corrections to the HQET Lagrangian are calculated by QCD sum rules in the framework of the heavy quark effective theory. The decay rates and branching ratios are computed with the inclusion of the order of 1/m Q corrections. It is found that the 1/m Q correction to the decay rate is not large for B → D * 2 but is very large for B → D 1 .

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“…The spectrum of the ground state heavy meson has been studied with the QCD sum rules in HQET in [3]. In [4] the mass of the lowest excited heavy meson doublets (2 + , 1 + ) and (1 + , 0 + ) were studied with QCD sum rules in the heavy quark effective theory (HQET) up to the order of O(1/m Q ).…”

Section: Introductionmentioning

confidence: 99%

“…The proper interpolating current J α 1 ···α j j,P,j ℓ for the states with the quantum number j, P , j ℓ in HQET was given in [4]. They were proved to satisfy the following conditions…”

Section: Introductionmentioning

confidence: 99%

Couplings of pions with excited heavy mesons from light-cone QCD sum rules in the leading order of HQET

Dai

Zhu

1999

Eur. Phys. J. C

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The couplings of pions with lowest three doublets (0 − , 1 − ), (0 + , 1 + ) and (1 + , 2 + ) of heavy mesons are studied with light-cone QCD sum rules in the leading order of heavy quark effective theory. The ambiguity due to presence of two distinct 1 + states are solved.PACS number: 12.39. Hg, 14.40.Nd, 12.38.Lg IntroductionRemarkbale progress has been made in understanding the physics of heavy mesons composed of a heavy quark and a light quark with the discovery of the heavy quark symmetry. To obtain detailed predictions one has to employ some specific nonperturbative methods, among which QCD sum rules [1] is very useful. The heavy quark effective theory (HQET)[2] provides a systematic expansion of QCD in terms of 1/m Q , where m Q is the heavy quark mass. The spectrum of the ground state heavy meson has been studied with the QCD sum rules in HQET in [3]. In [4] the mass of the lowest excited heavy meson doublets (2 + , 1 + ) and (1 + , 0 + ) were studied with QCD sum rules in the heavy quark effective theory (HQET) up to the order of O(1/m Q ).QCD sum rules has been used to analyse the couplings of the heavy hadrons with pions [5][6][7][8][9][10][11][12][13][14][15]. The widths for pionic decays of the lowest two excited doublets (2 + , 1 + ) and (1 + , 0 + ) is calculated with conventional QCD sum rules in the leading order of HQET in [5]. Light-cone QCD sum rules (LCQSR) with the full QCD Lagrangian is first employed to derive the strong coupling constants: g πD * D , g πB * B [11]. Recently the strong coupling constants: g πB * B * , g πB ′ 1 B ′ 0 and g πB ′ 1 B * were calculated using LCQSR with finite heavy quark mass [13]. The couplings of heavy baryons with soft pions have been estimated with QCD sum rules in an external axial field [14]. In this work we employ the LCQSR in HQET to calculate the on-shell couplings of the pions with heavy meson doublets (0 − , 1 − ), (0 + , 1 + ) and (1 + , 2 + ) to the leading order of 1/m Q . The LCQSR is quite different from the conventional QCD sum rules, which is based on the short-distance operator product expansion (OPE). The LCQSR is based on the 1

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QCD sum rules for masses of excited heavy mesons

Cited by 63 publications

References 17 publications

The hidden-charm pentaquark and tetraquark states

The hidden-charm pentaquark and tetraquark states

Subleading Isgur-Wise form factors andO(1/mQ)corrections to the semileptonic decaysB
Huang
¹
,
Dai
²

2001
Phys. Rev. D
Self Cite
14
0
5
0
View full text Add to dashboard Cite

Couplings of pions with excited heavy mesons from light-cone QCD sum rules in the leading order of HQET

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QCD sum rules for masses of excited heavy mesons

Cited by 63 publications

References 17 publications

The hidden-charm pentaquark and tetraquark states

The hidden-charm pentaquark and tetraquark states

Subleading Isgur-Wise form factors andO(1/mQ)corrections to the semileptonic decaysBHuang1, Dai2 2001Phys. Rev. DSelf Cite14050View full textAdd to dashboardCite

Couplings of pions with excited heavy mesons from light-cone QCD sum rules in the leading order of HQET

Contact Info

Product

Resources

About

Subleading Isgur-Wise form factors andO(1/mQ)corrections to the semileptonic decaysB
Huang
¹
,
Dai
²

2001
Phys. Rev. D
Self Cite
14
0
5
0
View full text Add to dashboard Cite