Observation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>h</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math>Radiative Decay<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>h</mml:mi><mml:mi>c</mml:mi></mml:msub><mml:mo stretchy="false">→</mml:mo><mml:mi>γ</mml:mi><mml:msup><mml:mi>η</mml:mi><mml:mo>′</mml:mo></mml:msup></mml:math>and Evidence for<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline

Ablikim, M.; Ачасов, М. Н.; Ai, X.; Albayrak, O.; Albrecht, M.; Ambrose, D.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Ferroli, R. Baldini; Ban, Y.; Bennett, D. W.; Bennett, J. V.; Bertani, M.; Bettoni, D.; Bian, J. M.; Bianchi, F.; Boger, E.; Boyko, I. R.; Briere, R. A.; Cai, H.; X, Cai; Çakır, O.; Calcaterra, A.; Cao, G. F.; Çetin, S. A.; Chang, J. F.; Chelkov, G. A.; Chen, G; Chen, H S; Chen, H Y; Chen, J C; Chen, M L; Chen, S; Chen, S J; Chen, X; Chen, X R; Chen, Y B; Cheng, H. P.; Chu, X. K.; Cibinetto, G.; Dai, H. L.; Dai, J. P.; Dbeyssi, A.; Dedovich, D. V.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; Mori, F. De; Ding, Y.; Dong, C.; Dong, Jianmeng; Dong, L. Y.; Dong, M. Y.; Dou, Z. L.; Du, S. X.; Duan, Pengfei; Fan, J.; Fang, J.; Fang, S. S.; Fang, X.; Fang, Y.; Farinelli, R.; Fava, L.; Fedorov, Oleg; Feldbauer, F.; Felici, G.; Feng, C. Q.; Fioravanti, E.; Fritsch, M.; Fu, C.D.; Gao, Q.; Gao, X. L.; Gao, X.; Gao, Y.; Gao, Z.; Garzia, I.; Goetzen, K.; Gong, L.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, Y. H.; Guo, A. Q.; Guo, L. B.; Guo, R. P.; Guo, Y. P.; Haddadi, Z.; Hafner, A.; Han, S.; Hao, X. Q.; Harris, F. A.; He, K. L.; Held, T.; Heng, Y. K.; Hou, Z. L.; Chen, Hu; Hu, H. M.; Hu, J.; Hu, T.; Hu, Y.; Huang, G. S.; Huang, J. S.; Huang, X. T.; Huang, Xiaozhong; Huang, Y.; Huang, Z.; Hussain, T.; Ji, Q.; Ji, Xiangdong; Ji, X. L.; Jiang, L. W.; Jiang, X. S.; Jiang, X. Y.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Johansson, T.; Julin, A.; Kalantar‐Nayestanaki, N.; Kang, X. L.; Kang, X. S.; Kavatsyuk, M.; Ke, B. C.; Kiese, P.; Kliemt, R.; Kloss, B.; Kolcu, O. B.; Kopf, B.; Kornicer, M.; Kupść, A.; Kühn, W.; Lange, J. S.; Lara, M.; Larin, P.; Leng, C.; Li, C; Li, Cheng; Li, D M; Li, F; Li, F Y; Li, G; Li, H B; Li, H J; Li, J C; Li, Jin; Li, K; Li, Lei; Li, P R; Li, Q Y; Li, T; Li, W D; Li, W G; Li, X L; Li, X N; Li, X Q; Li, Y B; Li, Z B; Liang, H.; Liang, Y. F.; Liang, Y. T.; Liao, G. R.; Lin, D. X.; Liu, B; Liu, B J; Liu, C X; Liu, D; Liu, F H; Liu, Fang; Liu, Feng; Liu, H B; Liu, H H; Liu, H M; Liu, J; Liu, J B; Liu, J P; Liu, J Y; Liu, K; Liu, K Y; Liu, L D; Liu, P L; Liu, Q; Liu, S B; Liu, X; Liu, Y B; Liu, Z A; Liu, Zhiqing; Loehner, H.; Lou, X.; Lu, H.; Lu, J. G.; Lu, Y.; Luo, C. L.; Luo, M. X.; Luo, T.; Luo, X. L.; Lyu, X. R.; C, F; L, H; L, L; M, M; M, Q; Ma, Tao; N, X; Y, X; M, Y; Maas, F. E.; Maggiora, M.; Mao, Y.; Mao, Z. P.; Marcello, S.; Messchendorp, J. G.; Min, J.; Mitchell, R. E.; Mo, X. H.; Mo, Y. J.; Morales, C. Morales; Muchnoi, N. Yu.; Muramatsu, H.; Nefedov, Y.; Nerling, F.; Nikolaev, I. B.; Ning, Z.; Nisar, S.; Niu, S. L.; Niu, X. Y.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Pan, Y.; Patterí, P.; Pelizaeus, M.; Peng, H.; Peters, K.; Pettersson, J.; Ping, J. L.; Ping, R. G.; Poling, R.; Prasad, V.; Qi, H. R.; Qi, M.; Qian, S. J.; Qiao, C. F.; Liu, Qin; Qin, N.; Qin, X. S.; Qin, Z. H.; Qiu, J. F.; Rashid, K. H.; Redmer, C. F.; Ripka, M.; Rong, G.; Rosner, Ch.; Ruan, X. D.; Sarantsev, A.; Savrié, M.; Schoenning, K.; Schumann, S.; Shan, W.; Shao, M.; Shen, C. P.; Shen, P. X.; Shen, X. Y.; Sheng, H. Y.; Shi, M.; Song, W. M.; Song, X. Y.; Sosio, S.; Spataro, S.; Sun, G. X.; Sun, J. F.; Sun, S. S.; Sun, X.; Sun, Y. J.; Sun, Y. Z.; Sun, Zaijing; Sun, Z. T.; Tang, C. J.; Tang, X.; Tapan, I.; Thorndike, E. H.; Tiemens, M.; Ullrich, M.; Uman, I.; Varner, G.; Wang, B; Wang, B L; Wang, D; Wang, D Y; Wang, K; Wang, L L; Wang, L S; Wang, M; Wang, P; Wang, P L; Wang, S G; Wang, W; Wang, W P; Wang, X F; Wang, Y; Wang, Y D; Wang, Y F; Wang, Y Q; Wang, Z; Wang, Z G; Wang, Z H; Wang, Z Y; Weber, T.; Wei, D. H.; Wei, J. B.; Weidenkaff, P.; Wen, S. P.; Wiedner, U.; Wolke, M.; Wu, L. H.; Wu, L. J.; Wu, Z.; Xia, L.; Xia, L.; Xia, Y.; Xiao, D.; Xiao, H.; Xiao, Z. J.; Xie, Y.; Xiu, Q. L.; Xu, G. F.; Xu, Jun; Xu, Lei; Xu, Q. J.; Xu, Q.; Xu, X. P.; Yan, L.; Yan, W. B.; Yan, Y. H.; Yang, H. J.; Yang, H. X.; Yang, L.; Yang, Yifan; Ye, M; Ye, M H; Yin, J. H.; Yu, B. X.; Yu, C. X.; Yu, J. S.; Yuan, C. Z.; Yuan, W. L.; Yuan, Y.; Yuncu, A.; Zafar, A. A.; Zallo, A.; Zeng, Y.; Zeng, Z.; Zhang, B X; Zhang, B Y; Zhang, C; Zhang, C C; Zhang, D H; Zhang, H H; Zhang, H Y; Zhang, J; Zhang, J J; Zhang, J L; Zhang, J Q; Zhang, J W; Zhang, J Y; Zhang, J Z; K, Zhang; Zhang, L; Zhang, S Q; Zhang, X Y; Zhang, Y; Zhang, Y H; Zhang, Y N; Zhang, Y T; Zhang, Yu; Zhang, Z H; Zhang, Z P; Zhang, Z Y; Zhao, G.; Zhao, J. W.; Zhao, J. Y.; Zhao, J.; Liu, Zhao; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, Q.; Zhao, S. J.; Zhao, T. C.; Zhao, Y. B.; Zhao, Z.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, W. J.; Zheng, Y.; Zhong, B.; Li, Zhou; Zhou, X. K.; Zhou, X. R.; Zhou, X. Y.; Zhu, K.; Zhu, S. H.; Zhu, X.; Zhu, Y.; Zhu, Y. S.; Zhu, Z.A.; Zhuang, J.; Zotti, L.; Zou, B. S.; Zou, J. H.

doi:10.1103/physrevlett.116.251802

Cited by 13 publications

(6 citation statements)

References 24 publications

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“…Totally, a 6% systematic uncertainty on tracking efficiency is attributed to all channels. The uncertainty on the photon detection efficiency is derived from a control sample of J=ψ → ρ 0 π 0 and is 1.0% per photon [21].…”

Section: Systematic Uncertaintymentioning

confidence: 99%

Study of electromagnetic Dalitz decays χcJ→μ+μ−J
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2019
Phys. Rev. D
Self Cite

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Using 4.48 × 10 8 ψð3686Þ events collected with the BESIII detector, we search for the decays χ cJ → μ þ μ − J=ψ through the radiative decays ψð3686Þ → γχ cJ , where J ¼ 0, 1, 2. The decays χ c1;2 → μ þ μ − J=ψ are observed, and the corresponding branching fractions are measured to be Bðχ c1 → μ þ μ − J=ψÞ ¼ ð2.51 AE 0.18 AE 0.20Þ × 10 −4 and Bðχ c2 → μ þ μ − J=ψÞ ¼ ð2.33 AE 0.18 AE 0.29Þ × 10 −4 , where the first uncertainty is statistical and the second one systematic. No significant χ c0 → μ þ μ − J=ψ decay is observed, and the upper limit on the branching fraction is determined to be 2.0 × 10 −5 at 90% confidence level. Also, we present a study of dimuon invariant mass dependent transition form factor for the decays χ c1;2 → μ þ μ − J=ψ.

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Section: Systematic Uncertaintymentioning

confidence: 99%

Study of electromagnetic Dalitz decays χcJ→μ+μ−J
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2019
Phys. Rev. D
Self Cite

View full text Add to dashboard Cite

show abstract

“…Here, the a MC sample that ter τ is determined rections for the raof 2%, one obtains is found to be ry and agree with as systematic unmethod (1) is used rection thin the Phokhara ry precise descrip-.5% [16]. polarization effects dressed cross secis adjusted for the and dressed cross (7) n the investigated ces are: ncertainty is student sources. Firstly, e data samples are n mentioned in Taby multiplying the and their fraction vary the selection rack in the MUC), samples for the efresolution of the rrection factors are ion factors, i.e., the varied by a factor rs are tested.…”

Section: Anomalous Magnetic Moment Of the Muonmentioning

confidence: 99%

“…The uncertainty is found to be 0.2%. (7) Vacuum Polarization: The uncertainty due to the vacuum polarization correction is conservatively estimated to be 0.2%. (8) Radiator Function: The Radiator Function extracted from the Phokhara generator is implemented with a precision of 0.5%.…”

Section: Besiii Collaboration / Physicsmentioning

confidence: 99%

“…Using a sample of 450 million ψ decays, BESIII has been able to make a measurement of the same ratio, B(γη)/B(γη ), for h c decays [7]. The processes ψ → π 0 h c with h c → γη ( ) were reconstructed using two decay modes of the η (π + π − η ( Fig.…”

Section: Studies Of Charmoniummentioning

confidence: 99%

“…In summary, we measure the e + e − → π + π − hc Born cross section using data at 79 CM energy points from 3.896 to 4.600 GeV. The cross sections are of the same order of magnitude as those of the e + e − → π + π − J/ψ and e + e − → π + π − ψ(2S) [4][5][6][7][8][9][10][11][12], but with a different line shape. The cross section drops in the high energy region, but more slowly than for the e + e − → π + π − J/ψ process.…”

Section: Parametersmentioning

confidence: 99%

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Results from Electron-Positron Collisions at BESIII

Mitchell¹

2017

Proceedings of 38th International Conference on High Energy Physics — PoS(ICHEP2016)

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A selection of results from electron-positron collisions at BESIII are reviewed. The results presented here illustrate the wide range of physics topics that can be studied using the Beijing Electron Positron Collider (BEPC). At low collision energies, the cross section for e + e − → π + π − provides much-needed input into theoretical calculations of the anomalous magnetic moment of the muon, and the reaction e + e − → pp provides access to the electromagnetic form factors of the proton. In the charmonium region, a large sample of ψ decays can be used to measure new decay modes of charmonium states. And at higher energies, BESIII is uniquely situated to explore questions concerning the still-unexplained XY Z states. PoS(ICHEP2016)600Results from BESIII Ryan E. Mitchell BESIII has collected a variety of data sets for e + e − collisions with center-of-mass energies between 2.0 and 4.6 GeV [1]. A few of the highlights, from low to high energy, include: a scan of the region between 2.0 and 3.0 GeV; 1.3 billion J/ψ decays; 450 million ψ decays; 2.9 fb −1 of data at the ψ(3770) mass; about 3 fb −1 at 4.18 GeV (primarily for studies of the D s meson); 0.8 fb −1 in a scan of the region between 3.85 and 4.59 GeV (spread over 104 points); and over 4 fb −1 collected between 3.81 and 4.60 GeV (in sets ranging from 50 pb −1 to 1.1 fb −1 ) for studies of the XY Z states. In addition to these fixed energies, one can also study e + e − collisions at any lower center-of-mass energy using the Initial State Radiation (ISR) technique, where photons are radiated from the primary e + or e − before the collision. The following represents a small selection of the recent results that have been derived from these data sets. Anomalous Magnetic Moment of the MuonThe difference between the Standard Model (SM) and the experimental (E821) values for the anomalous magnetic moment of the muon, a µ ≡ (g µ − 2)/2, is currently larger than 3σ :The error in the SM calculation is dominated by the Hadronic Vacuum Polarization (HVP) contribution, which is estimated using experimental input from e + e − collisions to hadrons. The cross section for e + e − collisions to hadrons, in turn, is dominated by the reaction e + e → π + π − in the region of the ρ meson, corresponding to collision energies between 600 and 900 MeV. But here there are experimental differences between BaBar and KLOE, as shown in Figure 1b, on the order of several sigma. If only the BaBar measurement is used in a SM µ , the difference between SM and experiment drops below 3σ . It is thus crucial to provide more experimental input. Letters B 753 (2016) 629-638 635 ed due to this efmoved by applying lgorithm. Here, the a MC sample that ter τ is determined rections for the raof 2%, one obtains is found to be ry and agree with as systematic unmethod (1) is used rection thin the Phokhara ry precise descrip-.5% [16]. polarization effects dressed cross secis adjusted for the and dressed cross (7) n the investigated ces are: ncertainty is student sources. Firstly, e data samples are n ...

show abstract

On the mass and decay constant of the P-wave ground and radially excited h _c and h _b axial-vector mesons

Azizi

Süngü

2019

J. Phys. G: Nucl. Part. Phys.

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The mass and decay constant of the heavy quarkonia hQ(1P ) and hQ(2P ) (Q = b, c) with quantum numbers J P C = 1 +− are calculated in the framework of the two-point QCD sum rule method by taking into account the vacuum condensates up to eight dimensions. We compare our results for parameters of the h b (1P ) and hc(1P ) quarkonia, and their first radially excited states h b (2P ) and hc(2P ) with available experimental data as well as predictions of other theoretical studies existing in the literature. The results of present work may shed light on experimental searches for the hc(2P ) state.

show abstract

Observation ofhcRadiative Decayhc→γη′and Evidence for
M. Ablikim¹,
М. Н. Ачасов²,
X. Ai³
et al.

Cited by 13 publications

References 24 publications

Study of electromagnetic Dalitz decays χcJ→μ+μ−J
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2019
Phys. Rev. D
Self Cite

Study of electromagnetic Dalitz decays χcJ→μ+μ−J
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2019
Phys. Rev. D
Self Cite

Results from Electron-Positron Collisions at BESIII

On the mass and decay constant of the P-wave ground and radially excited h _c and h _b axial-vector mesons

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Observation ofhcRadiative Decayhc→γη′and Evidence forM. Ablikim1, М. Н. Ачасов2, X. Ai3 et al.

Cited by 13 publications

References 24 publications

Study of electromagnetic Dalitz decays χcJ→μ+μ−JAblikim1, Ачасов2, Ahmed3 et al. 2019Phys. Rev. DSelf Cite

Study of electromagnetic Dalitz decays χcJ→μ+μ−JAblikim1, Ачасов2, Ahmed3 et al. 2019Phys. Rev. DSelf Cite

Results from Electron-Positron Collisions at BESIII

On the mass and decay constant of the P-wave ground and radially excited h c and h b axial-vector mesons

Contact Info

Product

Resources

About

Observation ofhcRadiative Decayhc→γη′and Evidence for
M. Ablikim¹,
М. Н. Ачасов²,
X. Ai³
et al.

Study of electromagnetic Dalitz decays χcJ→μ+μ−J
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2019
Phys. Rev. D
Self Cite

Study of electromagnetic Dalitz decays χcJ→μ+μ−J
Ablikim¹,
Ачасов²,
Ahmed³
et al. 2019
Phys. Rev. D
Self Cite

On the mass and decay constant of the P-wave ground and radially excited h _c and h _b axial-vector mesons