<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>B</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math>meson production around the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>Z</mml:mi><mml:mn>0</mml:mn></mml:msup></mml:math>peak at a high luminosity<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>+</mml:mo></mml:msup><mml:msup><mml:mi>e</mml:mi><mml:mo>−</mml:m

Yang, Zhi; Wu, Xing-Gang; Chen, Gu; Liao, Qi-Li; Zhang, Jiawei

doi:10.1103/physrevd.85.094015

Cited by 26 publications

(22 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(The mass parameters used by MadGraph are the pole masses. The difference between the 1S mass value used in [19] and the pole mass of a heavy quark is of the α 2 s order (see (1) of [28]), which can be neglected safely.) The cross section σ(e + e − → Z → bbcc), evaluated using MadGraph Table I.…”

Section: Introductionmentioning

confidence: 99%

Prospects of discovering stable double-heavy tetraquarks at a Tera-Z factory

et al. 2018

View full text Add to dashboard Cite

baryons and tetraquarks may be viewed as diquark-quark and diquark-antidiquark objects, respectively, with the diquarks having well-defined color, spin and flavor quantum numbers. Indeed, if tetraquarks, which are stable against strong and radiative decays, could be found in experiments, this would provide an irrefutable evidence of compact diquarks as building blocks of hadronic matter.The objects of our interest in this paper are the doublebottom J P = 1 + tetraquarks T {bb} [ūd] , and the related ones T {bb} [ūs] and T {bb} [ds] collected in Fig. 1, which have evoked lately a lot of theoretical and phenomenological interest [6][7][8][9][10][11], though the possibility of stable multiquark states was already pointed out a long time ago [12,13]. Likewise, estimates of the tetraquark masses with two heavy quarks carried out in quark models well over a decade ago also predicted stable tetraquarks [14].Concentrating on the T {bb} [ūd] state, which is a J P = 1 + , I = 0 tetraquark, consisting of the S-wave bound axialvector {bb} diquark and the scalar light [ūd] antidiquark, its mass is pitched at (10389 ± 21) MeV [6], lying about 215 MeV below the BB * threshold. Other esti-

show abstract

Section: Introductionmentioning

confidence: 99%

Prospects of discovering stable double-heavy tetraquarks at a Tera-Z factory

et al. 2018

View full text Add to dashboard Cite

show abstract

“…(1,2), and then we deal with the amplitude M by using the "improved trace technology" [7][8][9][10][11]. Under such approach, we first arrange the amplitude into four orthogonal subamplitudes M ±s±s ′ according to the spins of the outgoing quark q with spin s and antiquarkq ′ with spin s ′ .…”

Section: Fig 2 Feynman Diagrams For the Processmentioning

confidence: 99%

“…For the purpose, the "improved trace technology" is suggested and developed in the literature [7][8][9][10][11]. After generating proper phasespace points, one first calculate the numerical value for the amplitudes M i , and then sum these values algebraically and square it to get the squared amplitude,…”

mentioning

confidence: 99%

Excited heavy quarkonium production at the LHC throughWboson decays

Liao

Wu²,

Jiang³

et al. 2012

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

Sizable amount of heavy-quarkonium events can be produced through W -boson decays at the LHC. Such channels will provide a suitable platform to study the heavy-quarkonium properties. The "improved trace technology", which disposes the amplitude M at the amplitude-level, is helpful for deriving compact analytical results for complex processes. As an important new application, in addition to the production of the lower-level Fock states |(QQ ′ )[1S] and |(QQ ′ )[1P ] , we make a further study on the production of higher-excited. Here |(QQ ′ ) stands for the |(cc) -charmonium, |(cb) -quarkonium and |(bb) -bottomonium respectively. We show that sizable amount of events for those higher-excited states can also be produced at the LHC. Therefore, we need to take them into consideration for a sound estimation. If assuming all excited heavy-quarkonium states decay to the ground spin-singlet

show abstract

“…It is known that analytical expressions for the usual squared amplitudes in short-distance coefficients become complicated and lengthy for massive particles in final states especially for processes involving the P -wave Fock states. To solve the problem, the "improved trace technology" is suggested and developed [18][19][20][21], which is based on the helicity amplitudes method and deals with the trace calculation directly at the amplitude level. In this way, the amplitudes could be expressed with the linear combinations of independent Lorentz structures.…”

Section: Introductionmentioning

confidence: 99%

Production of excited heavy quarkonia in $e^+e^- \to γ^*/Z^0 \to |(Q\bar{Q})[n]\rangle +γ$ at super $Z$ factory

Liao,

Jiang,

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

Within the nonrelativistic quantum chromodynamics framework, we make a comprehensive study on the exclusive production of excited charmonium and bottomonium in ewhere the [n] represents the color-singlet n 1 S0, n 3 S1, n 1 P0 and n 3 PJ (n = 1, 2, 3, 4; J = 0, 1, 2) Fock states. The "improved trace technology" is adopted to derive the analytic expressions at the amplitude level, which is useful for calculating the complicated nP -wave channels. Total cross sections, differential distributions, and uncertainties are discussed in system. According to our study, production rates of heavy quarkonia of high excited Fock states are considerable at future Z factory. The cross sections of charmonium for 2S, 3S, 4S, 1P , 2P , 3P and 4P -wave states are about 53.5%, 30.4%, 23.7%, 13.7%, 6.8%, 9.2%, and 9.2% of that of the 1S state, respectively. And cross sections of bottomonium for 2S, 3S, 4S, 1P , 2P , 3P and 4P -wave states are about 39.3%, 12.3%, 14.3%, 7.1%, 3.1%, 2.7%, and 3.1% of that of the 1S state, respectively. The main uncertainties come from the radial wave functions at the origin and their derivatives at the origin under different potential models. Then, such super Z factory should be a good platform to study the properties of the high excited charmonium and bottomonium states.

show abstract

Bcmeson production around theZ0peak at a high luminositye+e−

Cited by 26 publications

References 47 publications

Prospects of discovering stable double-heavy tetraquarks at a Tera-Z factory

Prospects of discovering stable double-heavy tetraquarks at a Tera-Z factory

Excited heavy quarkonium production at the LHC throughWboson decays

Production of excited heavy quarkonia in $e^+e^- \to γ^*/Z^0 \to |(Q\bar{Q})[n]\rangle +γ$ at super $Z$ factory

Contact Info

Product

Resources

About