Measurement of proton electromagnetic form factors in the time-like region using initial state radiation at BESIII

Ablikim, M.; Ачасов, М. Н.; Adlarson, P.; Ahmed, S.; Albrecht, M.; Aliberti, R.; Amoroso, A.; An, M. R.; An, Q.; Bai, X. H.; Bai, Y.; Bakina, O.; Ferroli, R. Baldini; Balossino, I.; Ban, Y.; Begzsuren, K.; Berger, N.; Bertani, M.; Bettoni, D.; Bianchi, F.; Bloms, J.; Bortone, A.; Boyko, I. R.; Briere, R. A.; Cai, H.; Cai, X.; Calcaterra, A.; Cao, G. F.; Cao, N.; Çetin, S. A.; Chang, J. F.; Chang, W. L.; Chelkov, G. A.; Chen, D.Y.; Chen, G.; Chen, H.S.; Chen, M.L.; Chen, S.J.; Chen, X.R.; Chen, Y.B.; Chen, Z.J.; Cheng, W. S.; Cibinetto, G.; Cossio, F.; Cui, X. F.; Dai, H. L.; Dai, X. C.; Dbeyssi, A.; Boer, R. E. de; Dedovich, D. V.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; Mori, F. De; Ding, Y.; Dong, C.; Dong, J.; Liu, Dong; Dong, M. Y.; Dong, X.; Du, S. X.; Fan, Y. L.; Fang, J.; Fang, S. S.; Fang, Y.; Farinelli, R.; Fava, L.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Feng, J. H.; Fritsch, M.; Fu, C. D.; Gao, Y. 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R.; Ma, F.C.; Ma, Hailong; Ma, L.L.; Ma, Miao; Ma, Qiumei; Ma, R.; Ma, Xinxin; Ma, Xiaoyan; Maas, F. E.; Maggiora, M.; Maldaner, S.; Malde, S.; Malik, Q. A.; Mangoni, A.; Mao, Y.; Mao, Z. P.; Marcello, S.; Meng, Z.; Messchendorp, J. G.; Mezzadri, G.; Min, T. J.; Mitchell, R. E.; Mo, X. H.; Mo, Y. J.; Muchnoi, N. Yu.; Muramatsu, H.; Nakhoul, S.; Nefedov, Y.; Nerling, F.; Nikolaev, I. B.; Ning, Z.; Nisar, S.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Pan, X.; Pan, Y.; Pathak, A.; Patterí, P.; Pelizaeus, M.; Peng, H.; Peters, K.; Pettersson, J.; Ping, J. L.; Ping, R. G.; Poling, R.; Prasad, V.; Qi, H. R.; Qi, K. H.; Qi, M.; Qi, T. Y.; Qian, S. J.; Qian, W.; Qian, Z.; Qiao, C. F.; Liu, Qin; Qin, X. P.; Qin, X. S.; Qin, Z. H.; Qiu, J. F.; Qu, S. Q.; Rashid, K. H.; Ravindran, K.; Redmer, C. F.; Rivetti, A.; Rodin, V.; Rolo, M.; Rong, G.; Rosner, Ch.; Rump, M.; Sang, H. S.; Sarantsev, A.; Schelhaas, Y.; Schnier, C.; Schoenning, K.; Scodeggio, M.; Shan, D. C.; Shan, W.; Shan, X. 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P.; Zheng, Y.; Zheng, Y.; Zhong, B.; Chen, Zhong; Li, Zhou; Zhou, Q.; Zhou, X. K.; Zhou, X. K.; Zhou, X. R.; Zhu, A. N.; Zhu, Jing; Zhu, K. J.; Zhu, K.; Zhu, S. H.; Zhu, T. J.; Zhu, W. J.; Zhu, Y.; Zhu, Z. A.; Zou, B. S.; Zou, J. H.

doi:10.1016/j.physletb.2021.136328

Cited by 36 publications

(42 citation statements)

References 43 publications

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“…energies between 2.0 and 3.08 GeV [ 36 , 37 ] that favor BaBar over PS170 and helped clarify the puzzle. BESIII also performed the measurements using the ISR technique [ 38 , 39 ], with results that are consistent with those of BaBar. The BESIII measurements are shown in panel (a) of Fig.…”

Section: Baryon Form Factor Measurements At Besiiimentioning

confidence: 68%

Probing the internal structure of baryons

Huang

Ferroli

2021

National Science Review

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Electromagnetic form factors are fundamental observables that describe the electric and magnetic structure of hadrons and provide keys to understand the strong interaction. At the Beijing Spectrometer (BESIII), form factors have been measured for different baryons in the time-like region for the first time or with the best precision. The results are presented with examples focus on but not limited to the proton/neutron, the Λ, with a strange quark, and the Λc, with a charm quark.

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Section: Baryon Form Factor Measurements At Besiiimentioning

confidence: 68%

Probing the internal structure of baryons

Huang

Ferroli

2021

National Science Review

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“…5). The shown data are the published measurements from BESIII [36,37,45,46], BABAR [47][48][49], CMD3 [34,35], CLEO [33], BES [32], FENICE [20][21][22], E835 [30,31], E760 [29], DM2 [24,25], DM1 [23], and ADONE [18]. In the fit, χ 2 is defined as…”

Section: Theoretical Approaches To Thementioning

confidence: 99%

“…Here, A = 8.79 14) suggested in [44,54] with the 3-pole (green dashed-dotted curve and band) and oscillation (magenta dotted curve and band) contributions; (b) residuals of the proton |G eff |, after subtraction of the smooth function described by Equation (12), as a function of the relative momentum p(s) = s( s 4m 2 p − 1) with a fit of the oscillation according to Equation (13) (magenta solid curve and band). The shown data are the published measurements from BESIII [36,37,45,46], BABAR [47][48][49], CMD3 [34,35], CLEO [33], BES [32], FENICE [20][21][22], E835 [30,31], E760 [29], PS170 [26][27][28], DM2 [24,25], DM1 [23], M. S. T [19], and ADONE [18]. The definition of χ 2 is the same as in Figure 8.…”

Section: Periodic Interference Structures In the Tl Proton Ffmentioning

confidence: 99%

“…with a fit of the oscillation according to Equation ( 13) (magenta and cyan solid curve and band for the proton and neutron, respectively). The shown data are the published measurements from BESIII (proton [36,37,45,46] and neutron [55]), BABAR [47][48][49], and CMD3 [34,35]. The definition of χ 2 is the same as in Figure 8.…”

Section: Periodic Interference Structures In the Tl Proton Ffmentioning

confidence: 99%

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Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique

et al. 2022

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For over 100 y, scientists have investigated the properties of the proton, which is one of the most abundant components of visible matter in the universe. Nevertheless, researchers do not fully understand many details about its internal structure and dynamics. Time-like electromagnetic form factors are some of the observable quantities that can help us achieve a deeper understanding. In this review article, we present an overview of the current experimental status in this field, consisting of measurements of the time-like reactions e+e−→pp¯ and pp¯→e+e− and future measurements of pp¯→μ+μ−. The focus is put on recent high-precision results of the reaction e+e−→pp¯ that have been obtained after analyzing 688.5 pb−1 of data taken at the BESIII experiment. They are compared to and put into perspective with results from previous measurements in this channel. We discuss the channels pp¯→e+e− and pp¯→μ+μ− in terms of the few existing, as well as future measurements, which the PANDA experiment will perform. Finally, we review several new theoretical models and phenomenological approaches inspired by the BESIII high-precision results and then discuss their implications for a deeper understanding of the proton’s structure and inner dynamics.

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“…The measurement of the baryon-anti-baryon cross section from electron-positron annihilation has attracted great interest in recent years, especially in the region near to the production threshold, partially owing to the efforts of the BESIII Collaboration. Although there are plenty of results for nucleons [1,2] and hyperons [3][4][5], studies of the charmed baryon are scarce.…”

Section: Introductionmentioning

confidence: 99%

A Fit to the Available e+e− → Λc+Λ¯c− Cross Section Data Nearby Production Threshold by Means of a Strong Correction to the Coulomb Enhancement Factor

et al. 2021

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There are two available sets of data on the e+e−→Λc+Λ¯c− cross section at energies close to the production threshold, collected by the Belle and by the BESIII Collaborations. The measurement of the former, performed by means of the initial state radiation technique, is compatible with the presence of a resonance, called ψ(4660), observed also in other final states. On the contrary, the latter is measured an almost flat and hence non-resonant cross section in the energy region just above the production threshold, but the data stop before the possible rise in the cross section for the resonant production. We propose an effective model to describe the behavior of the data near this threshold, which is based on a Coulomb-like enhancement factor due to the strong interaction among the final state particles. In the framework of this model, it is possible to describe both datasets.

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Measurement of proton electromagnetic form factors in the time-like region using initial state radiation at BESIII

Cited by 36 publications

References 43 publications

Probing the internal structure of baryons

Probing the internal structure of baryons

Proton Electromagnetic Form Factors in the Time-like Region through the Scan Technique

A Fit to the Available e+e− → Λc+Λ¯c− Cross Section Data Nearby Production Threshold by Means of a Strong Correction to the Coulomb Enhancement Factor

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