A short theoretical review of charmonium production

Chen, Anping; Ma, Yan-Qing; Zhang, Hong

doi:10.48550/arxiv.2109.04028

Cited by 7 publications

(12 citation statements)

References 130 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By further integrating the differential cross sections d 2 σ/(dz dcosθ) over cosθ, we obtain the differential cross sections dσ/dz, which are presented in Figs. (5,6,7,8). As a comparison of the NLO+NLL fragmentationfunction result (labelled as "Frag, NLO+NLL"), we also present the results for the full NLO NRQCD approach (labelled as "Full NRQCD, NLO"), the fragmentationfunction approach up to NLO level but without doing the resummation of the large logarithms of m 2 Q /s (labelled as "Frag, NLO"), and the combined results of the fragmentation-function approach and the full NRQCD approach (labelled as "Combined, NLO+NLL").…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…Those neglected terms can be recovered with the help of Eqs. (1,5), and we then obtain the combined result of the fragmentation-function approach and the full NRQCD approach up to NLO level, i.e.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…Therefore, the "Combined, NLO+NLL" results are the most accurate results among those predictions shown in Figs. (5,6,7,8).…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…Similar to the heavy quarkonia such as η c , J/ψ, η b , Υ, and etc., the B c meson production cross section can also be factorized through the nonrelativistic QCD (NRQCD) [1] factorization theory and a lot of information for the production of B c can be calculated perturbatively. Compared with the quarkonium production where color-octet contribution is usually important [2][3][4][5], the production mechanism of the B c meson is simpler due to the fact that the color-octet contribution is always suppressed compared to the color-singlet contribution in the B c production processes.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Production of the $B_c$ meson at the CEPC

Zhang,

Zheng,

2021

Preprint

View full text Add to dashboard Cite

In this paper, we make a detailed study on the production of the Bc, B * c , Bc(2 1 S0), and B * c (2 3 S1) mesons via the three planned running modes (Z, W , and H) at the future Circular Electron-Positron Collider (CEPC). The fragmentation-function and full nonrelativistic QCD approaches are adopted to calculate the production cross sections. Considering the excited states shall decay to the ground Bc state (e.g. 1 1 S0-state) with almost 100% probability, our numerical results show that up to next-to-leading order QCD corrections, there are about 1.4 × 10 8 Bc events to be accumulated via the Z mode ( √ s = m Z ) of the CEPC, but only about 1.6 × 10 4 and 1.1 × 10 4 Bc events to be accumulated via the W ( √ s = 160 GeV) and H ( √ s = 240 GeV) modes, respectively. Since the Z mode is the best mode among the three planned modes of the CEPC for studying the production of the Bc, B * c , Bc(2 1 S0), and B * c (2 3 S1) mesons and the differential distributions of these mesons may be measured precisely at this mode, we further present the differential cross sections dσ/(dz dcosθ) and dσ/dz via the Z mode of the CEPC.

show abstract

Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…Therefore, the "Combined, NLO+NLL" results are the most accurate results among those predictions shown in Figs. (5,6,7,8).…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Production of the $B_c$ meson at the CEPC

Zhang,

Zheng,

2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Meanwhile, lots of theoretical and phenomenal efforts have been made to explain the measurements and to explore QCD. We refer the readers to some review papers to get detailed information on the status, puzzles and prospects on heavy quarkonium [13][14][15].…”

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

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

Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at $$ \sqrt{\mathrm{s}} $$ = 5.02 and 13 TeV

Acharya

Adamová

Adler

et al. 2022

J. High Energ. Phys.

View full text Add to dashboard Cite

The production of J/ψ is measured at midrapidity (|y| < 0.9) in proton-proton collisions at $$ \sqrt{s} $$ s = 5.02 and 13 TeV, through the dielectron decay channel, using the ALICE detector at the Large Hadron Collider. The data sets used for the analyses correspond to integrated luminosities of $$ \mathcal{L} $$ L int = 19.4 ± 0.4 nb−1 and $$ \mathcal{L} $$ L int = 32.2 ± 0.5 nb−1 at $$ \sqrt{s} $$ s = 5.02 and 13 TeV, respectively. The fraction of non-prompt J/ψ mesons, i.e. those originating from the decay of beauty hadrons, is measured down to a transverse momentum pT = 2 GeV/c (1 GeV/c) at $$ \sqrt{s} $$ s = 5.02 TeV (13 TeV). The pT and rapidity (y) differential cross sections, as well as the corresponding values integrated over pT and y, are carried out separately for prompt and non-prompt J/ψ mesons. The results are compared with measurements from other experiments and theoretical calculations based on quantum chromodynamics (QCD). The shapes of the pT and y distributions of beauty quarks predicted by state-of-the-art perturbative QCD models are used to extrapolate an estimate of the $$ \mathrm{b}\overline{\mathrm{b}} $$ b b ¯ pair cross section at midrapidity and in the total phase space. The total $$ \mathrm{b}\overline{\mathrm{b}} $$ b b ¯ cross sections are found to be $$ {\sigma}_{\mathrm{b}\overline{\mathrm{b}}} $$ σ b b ¯ = 541 ± 45 (stat.) ± 69 $$ {\left(\mathrm{syst}.\right)}_{-12}^{+10} $$ syst . − 12 + 10 (extr.) μb and $$ {\sigma}_{\mathrm{b}\overline{\mathrm{b}}} $$ σ b b ¯ = 218±37 (stat.)±31 $$ {\left(\mathrm{syst}.\right)}_{-9.1}^{+8.2} $$ syst . − 9.1 + 8.2 (extr.) μb at $$ \sqrt{s} $$ s = 13 and 5.02 TeV, respectively. The value obtained from the combination of ALICE and LHCb measurements in pp collisions at $$ \sqrt{s} $$ s = 13 TeV is also provided.

show abstract

A short theoretical review of charmonium production

Cited by 7 publications

References 130 publications

Production of the $B_c$ meson at the CEPC

Production of the $B_c$ meson at the CEPC

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

Prompt and non-prompt J/ψ production cross sections at midrapidity in proton-proton collisions at $$ \sqrt{\mathrm{s}} $$ = 5.02 and 13 TeV

Contact Info

Product

Resources

About