Observation of 
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Jia, S.; Wang, X. L.; Shen, C. P.; Yuan, C. Z.; Adachi, I.; Aihara, H.; Said, S. Al; Asner, D. M.; Atmacan, H.; Aulchenko, V.; Aushev, T.; Ayad, R.; Babu, V.; Bansal, V.; Behera, P. K.; Beleño, C.; Berger, Martin; Bhuyan, B.; Bilka, T.; Biswal, Jyoti Prakash; Bobrov, A.; Bożek, A.; Bračko, M.; Browder, T. E.; Cao, L.; Červenkov, D.; Chang, P.; Chekelian, V.; Chen, A.; Cheon, B. G.; Chilikin, K.; Cho, K.; Choi, S. K.; Choi, Y.; Choudhury, S.; Cinabro, D.; Cunliffe, S.; Dash, N.; Carlo, S. Di; Doležal, Z.; Dong, T. V.; Eidelman, S.; Epifanov, D.; Fast, J. E.; Ferber, T.; Frey, A.; Fulsom, B. G.; Garg, R.; Gaur, V.; Gabyshev, N.; Garmash, A.; Gelb, M.; Giri, A.; Goldenzweig, P.; Greenwald, D.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hou, W.-S.; Hsu, C.-L.; Iijima, T.; Inami, K.; Inguglia, G.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Jacobs, W. W.; Jin, Y.; Joffe, D.; Kahn, J.; Kaliyar, A. B.; Karyan, G.; Kawasaki, T.; Kichimi, H.; Kiesling, C.; Kim, D. Y.; Kim, H. J.; Kim, J. B.; Kim, S. H.; Kinoshita, K.; Kodyš, P.; Korpar, S.; Kotchetkov, D.; Križan, P.; Kroeger, R.; Krokovny, P.; Kuhr, T.; Kulasiri, R.; Kumar, Rajeev; Kuzmin, A.; Kwon, Y. J.; Lalwani, K.; Lange, J. S.; Lee, I. S.; Lee, J. Y.; Lee, S. C.; Li, C. H.; Li, L. K.; Li, Y. B.; Gioi, L. Li; Libby, J.; Liptak, Z.; Liventsev, D.; Lu, P.-C.; Lubej, M.; MacNaughton, J.; Masuda, M.; Matsuda, T.; Matvienko, D.; Merola, M.; Miyata, H.; Mizuk, R.; Mori, Takashi; Mussa, R.; Nakano, E.; Nakao, M.; Nath, K. J.; Nayak, M.; Nisar, N. K.; Nishida, S.; Ogawa, S.; Olsen, S. L.; Ono, Hiroyuki; Onuki, Y.; Ostrowicz, W.; Pakhlova, G.; Pal, B. K.; Pardi, S.; Paul, S.; Pedlar, T. K.; Pestotnik, R.; Piilonen, L. E.; Popov, V.; Prencipe, E.; Ritter, M.; Rostomyan, A.; Russo, G.; Sakai, Y.; Salehi, M.; Sandilya, S.; Šantelj, L.; Sanuki, T.; Savinov, V.; Schneider, O.; Schnell, G.; Schueler, J.; Schwanda, C.; Seino, Y.; Senyo, K.; Sevior, M. E.; Shibata, T. A.; Shiu, J. G.; Simon, F.; Sokolov, A.; Solovieva, E.; Starič, M.; Stottler, Z. S.; Strube, J.; Sumiyoshi, T.; Sutcliffe, W.; Takizawa, M.; Tanida, K.; Tao, Y.; Tenchini, F.; Uchida, M.; Uehara, S.; Uglov, T.; Unno, Y.; Uno, S.; Urquijo, P.; Usov, Y.; Tonder, R. Van; Varner, G.; Varvell, K. E.; Vorobyev, V.; Waheed, E.; Wang, B.; Wang, C. H.; Wang, M.-Z.; Wang, P.; Watanuki, S.; Widmann, E.; Won, E.; Yamamoto, H.; Yang, S. B.; Ye, H.; Yin, J. H.; Yusa, Y.; Zhang, Z. P.; Zhilich, V.; Zhukova, V.; Zhulanov, V.

doi:10.1103/physrevd.98.092015

Cited by 16 publications

(19 citation statements)

References 26 publications

(37 reference statements)

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“…Section 3 presents numerical results for the cross section and for the Z-boson decay rate into this process and Sec. 4 compares our result at the Belle energy to the previous results and to Belle's recent limit [30]. We finally summarize in Sec.…”

Section: Introductionsupporting

confidence: 72%

“…. Status of NRQCD predictions (points) and Belle's upper limit [30] (horizontal gray line) for e + e − → η c + γ. This work on right side for LL and for NLL+NLO with v 2 corrections is compared to previous predictions (from the left) at NLO [19], NLO with v 2 correction [17] and with v 2 resummation [22], and NNLO [21].…”

Section: Final Resultsmentioning

confidence: 99%

“…In Fig. 4, we summarize the status of NRQCD predictions (points) in comparison with Belle's upper limit (90% credibility level) [30] (gray line) for σ(e + e − → η c + γ) at √ s = 10.58 GeV. Since the resummation effect is not substantial at this energy our results LL and NLL+NLO+v 2 on the right side of the plot should be comparable to LO and to NLO with v 2 corrections.…”

Section: Comparison To Various Predictions and Belle's Upper Limitmentioning

confidence: 99%

“…Recently the Belle experiment analyzed S-wave (η c + γ) and P-wave (χ cJ + γ with J = 0, 1, 2) channels [30]. While P-wave cross section (J = 1) and upper limits (J = 0, 2) are consistent with the theoretical predictions [16][17][18][19], S-wave upper limit σ exp ηc+γ ≤ 21.1 fb at 90 % credibility level is in tension with our NLL+NLO prediction 32.7±2.8 fb by 4.1σ.…”

Section: Correctionsmentioning

confidence: 99%

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Pseudoscalar quarkonium+γ production at NLL+NLO accuracy

Chung

Kang

et al. 2019

J. High Energ. Phys.

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We consider the exclusive pseudoscalar heavy-quarkonium (η b,c ) production in association with a photon at future lepton colliders where the collider energies of O(10 2 ) GeV are far greater than the quarkonium mass. At these energies, the logarithm of mass to collision energy becomes increasingly large hence its resummation becomes particularly important. By making use of the light-cone-distribution factorization formula, we resum the logarithms up to next-to-leading-logarithmic accuracy (NLL) that corresponds to order-α s accuracy. We combine the resummed result with a known fixed-order result at next-to-leading order (NLO) such that both resummed-logarithmic terms and non-logarithmic terms are included at the same order in α s . This allowed us to provide reliable predictions at accuracies of order α s ranging from relatively low energies near quarkonium mass to the collider energies of O(10 2 ) GeV. We also include the leading relativistic corrections resummed at leadinglogarithmic accuracy. Our prediction at the Belle energy is comparable with fixed-order predictions in literatures while it shows a large deviation from a recent Belle's upper limit by about 4 σ. Finally, we make predictions for the energies of future Z-and Higgs factories.

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Section: Introductionsupporting

confidence: 72%

Section: Final Resultsmentioning

confidence: 99%

Section: Comparison To Various Predictions and Belle's Upper Limitmentioning

confidence: 99%

Section: Correctionsmentioning

confidence: 99%

See 2 more Smart Citations

Pseudoscalar quarkonium+γ production at NLL+NLO accuracy

Chung

Kang

et al. 2019

J. High Energ. Phys.

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“…Here we pay attention to the fact that this ERT predicts the correct value of the mass of the Υ(1 3 D 1 ) state, while the solution of the SSE is ∼ 20 MeV smaller. Also the ERT gives the mass of χ b1 (3P ) between the values observed in the experiments of LHCb [6] and Belle [41].…”

Section: Introductionmentioning

confidence: 96%

Radial and orbital Regge trajectories in heavy quarkonia

Бадалян

Баккер

2019

Phys. Rev. D

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The spectra of heavy quarkonia are studied in two approaches: with the use of the Afonin-Pusenkov representation of the Regge trajectory for the squared excitation energy E 2 (nl) (ERT), and using the relativistic Hamiltonian with the universal interaction. The parameters of the ERTs are extracted from experimental mass differences and their values in bottomonium: the intercept a(bb) = 0.131 GeV 2 , the slope of the orbital ERT b l (bb) = 0.50 GeV 2 , and the slope of the radial ERT, bn(bb) = 0.724 GeV 2 , appear to be smaller than those in charmonium, where a(cc) = 0.381 GeV 2 , b l (cc) = 0.686 GeV 2 , and the radial slope bn(cc) = 1.074 GeV 2 , which value is close to that in light mesons, bn(qq) = 1.1(1) GeV 2 . For the resonances above the DD threshold the masses of the χc0(nP ) with n = 2, 3, 4, equal to 4218 MeV, 4503 MeV, 4754 MeV, are obtained, while above the BB threshold the resonances Υ(3 3 D1) with the mass 10693 MeV and χ b1 (4 3 P1) with the mass 10756 MeV are predicted.

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Exclusive quarkonium production or decay in soft gluon factorization

Feng

2020

J. High Energ. Phys.

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In this paper, we study the application of the recently proposed soft gluon factorization (SGF) to exclusive quarkonium production or decay. We find that in the nonrelativistic QCD factorization framework there are too many nonperturbative parameters. Thanks to the factorization of kinematical physics from dynamical physics, the SGF significantly reduces the number of nonperturbative parameters. Therefore, the SGF can improve our predictive power of exclusive quarkonium production or decay. By applying to η c + γ production at B-factories, our result is the closest one to data among all theoretical calculations.

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Observation of e+e−→γχc1 and search for

Cited by 16 publications

References 26 publications

Pseudoscalar quarkonium+γ production at NLL+NLO accuracy

Pseudoscalar quarkonium+γ production at NLL+NLO accuracy

Radial and orbital Regge trajectories in heavy quarkonia

Exclusive quarkonium production or decay in soft gluon factorization

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