Deeply virtual Compton scattering cross section at high Bjorken $x_B$

Georges, F.; Rashad, M. N. H.; Stefanko, A.; Dlamini, M.; Karki, B.; Ali, S. F.; Lin, P-J.; Ko, H-S; Israel, N.; Adikaram, D.; Ahmed, Z.; Albataineh, H.; Aljawrneh, B.; Allada, K.; Allison, S.; Alsalmi, S.; Androic, D.; Aniol, K.; Annand, J.; Atac, H.; Averett, T.; Gayoso, C. Ayerbe; Bai, X.; Bane, J.; Barcus, S.; Bartlett, K.; Bellini, V.; Beminiwattha, R.; Bericic, J.; Biswas, D.; Brash, E.; Bulumulla, D.; Campbell, J.; Camsonne, A.; Carmignotto, M.; Castellano, J.; Chen, C.; Chen, J-P.; Chetry, T.; Christy, M. E.; Cisbani, E.; Clary, B.; Cohen, E.; Compton, N.; Cornejo, J. C.; Dusa, S. Covrig; Crowe, B.; Danagoulian, S.; Danley, T.; De Persio, F.; Deconinck, W.; Defurne, M.; Desnault, C.; Di, D.; Duer, M.; Duran, B.; Ent, R.; Fanelli, C.; Franklin, G.; Fuchey, E.; Gal, C.; Gaskell, D.; Gautam, T.; Glamazdin, O.; Gnanvo, K.; Gray, V. M.; Gu, C.; Hague, T.; Hamad, G.; Hamilton, D.; Hamilton, K.; Hansen, O.; Hauenstein, F.; Henry, W.; Higinbotham, D. W.; Holmstrom, T.; Horn, T.; Huang, Y.; Huber, G. M.; Hyde, C.; Ibrahim, H.; Jen, C-M.; Jin, K.; Jones, M.; Kabir, A.; Keppel, C.; Khachatryan, V.; King, P. M.; Li, S.; Li, W. B.; Liu, J.; Liu, H.; Liyanage, A.; Magee, J.; Malace, S.; Mammei, J.; Markowitz, P.; McClellan, E.; Mazouz, M.; Meddi, F.; Meekins, D.; Mesik, K.; Michaels, R.; Mkrtchyan, A.; Montgomery, R.; Camacho, C. Muñoz; Myers, L. S.; Nadel-Turonski, P.; Nazeer, S. J.; Nelyubin, V.; Nguyen, D.; Nuruzzaman, N.; Nycz, M.; Obretch, O. F.; Ou, L.; Palatchi, C.; Pandey, B.; Park, S.; Park, K.; Peng, C.; Pomatsalyuk, R.; Pooser, E.; Puckett, A. J. R.; Punjabi, V.; Quinn, B.; Rahman, S.; Reimer, P. E.; Roche, J.; Sapkota, I.; Sarty, A.; Sawatzky, B.; Saylor, N. H.; Schmookler, B.; Shabestari, M. H.; Shahinyan, A.; Sirca, S.; Smith, G. R.; Sooriyaarachchilage, S.; Sparveris, N.; Spies, R.; Su, T.; Subedi, A.; Sulkosky, V.; Sun, A.; Thorne, L.; Tian, Y.; Ton, N.; Tortorici, F.; Trotta, R.; Urciuoli, G. M.; Voutier, E.; Waidyawansa, B.; Wang, Y.; Wojtsekhowski, B.; Wood, S.; Yan, X.; Ye, L.; Ye, Z.; Yero, C.; Zhang, J.; Zhao, Y.; Zhu, P.

doi:10.48550/arxiv.2201.03714

Cited by 6 publications

(21 citation statements)

References 27 publications

(38 reference statements)

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“…According to the measurements and fitting in ref. [29], the BH cross-section is indeed about 3-4 times the pure DVCS cross-section with fitted CFFs at this kinematical point.…”

Section: Jhep06(2022)096mentioning

confidence: 59%

“…This requires larger Q 2 in order to suppress the higher-twist effects, since they are generally suppressed by the factor t/Q 2 . Indeed, as shown in the recent JLab Hall A DVCS measurements at high x B [29], a large Q 2 of 8.40 GeV 2 associated with beam energy E b = 10.59 GeV is set, when x B reaches 0.6. By repeating the same calculations above, we show that the higher-twist effects are indeed kinematically suppressed, as shown in figure 13.…”

Section: Jhep06(2022)096mentioning

confidence: 82%

“…We denote one of the most popular formulas as the Belitsky-Müller-Kirchner (BMK01) one [59], which receives higher-order kinematical corrections [65](BMK10) and then gets refreshed in the Belitsky-Müller-Ji (BMJ) formulas [66] to include the transversely polarized target. The latest version of this series used in the fitting of the recent JLab Hall A DVCS measurement [29] is the Braun-Manashov-Müller-Pirnay (BMMP) formulas [47], where kinematical twist-four effects such as target-mass and finite-t corrections are considered. Another recent work in the literature, denoted VA, is given in ref.…”

Section: Comments On the Cross-section Formulasmentioning

confidence: 99%

“…Encoded in this process are the important information of the nucleon such as the mass, angular momentum and mechanical properties [1,4,5] and the three-dimensional structure of the nucleon [6][7][8]. There have been numerous measurements from HERA (H1 [9][10][11][12], ZEUS [13,14] and HERMES [15,16]) and Jefferson Lab (JLab) (CLAS [17][18][19][20][21][22][23][24] and Hall A [25][26][27][28][29]) spanning decades, and more programs are planned in the future such as the JLab 24 GeV, EIcC [30] and EIC [31].…”

Section: Introductionmentioning

confidence: 99%

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Twist-three cross-sections in deeply virtual Compton scattering

Guo

Kriesten³

et al. 2022

J. High Energ. Phys.

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We study the deeply virtual Compton scattering process with both twist-two and twist-three Compton form factors and present our cross-sections formulas with all polarization configurations. While the twist-three contributions are generally assumed to be negligible in the literature due to the kinematical suppression, we compare them with the twist-two ones at typical JLab 6 GeV and 12 GeV kinematics as well as EIC kinematics and show their kinematical suppression explicitly, justifying the leading-twist approximation made in the literature. In addition, we also estimate the twist-three Compton form factors using Wandzura-Wilczek relations and inputs of twist-two generalized parton distributions based on a reggeized spectator model. With those estimated Compton form factors, we analyze the kinematical behavior of twist-two and twist-three cross-sections in a wide range of kinematics, and discuss the optimal regions for separating the leading-twist effects from the higher-twist ones.

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“…According to the measurements and fitting in ref. [29], the BH cross-section is indeed about 3-4 times the pure DVCS cross-section with fitted CFFs at this kinematical point.…”

Section: Jhep06(2022)096mentioning

confidence: 59%

Section: Jhep06(2022)096mentioning

confidence: 82%

Section: Comments On the Cross-section Formulasmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Twist-three cross-sections in deeply virtual Compton scattering

Guo

Kriesten³

et al. 2022

J. High Energ. Phys.

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show abstract

“…[6], to more recent analyses Refs. [60,61] using conventional approaches, and Refs. [25,[62][63][64], using ANN-based approaches.…”

Section: Discussionmentioning

confidence: 99%

Benchmarks for a Global Extraction of Information from Deeply Virtual Exclusive Scattering

Almaeen¹,

Grigsby²,

Hoskins³

et al. 2022

Preprint

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Generalized parton distributions through universal moment parameterization: non-zero skewness case

Guo

Santiago³

et al. 2023

J. High Energ. Phys.

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We present the first global analysis of generalized parton distributions (GPDs) combing lattice quantum chromodynamics (QCD) calculations and experiment measurements including global parton distribution functions (PDFs), form factors (FFs) and deeply virtual Compton scattering (DVCS) measurements. Following the previous work where we parameterize GPDs in terms of their moments, we extend the framework to allow for the global analysis at non-zero skewness. Together with the constraints at zero skewness, we fit GPDs to global DVCS measurements from both the recent JLab and the earlier Hadron-Electron Ring Accelerator (HERA) experiments with two active quark flavors and leading order QCD evolution. With certain choices of empirical constraints, both sea and valence quark distributions are extracted with the combined inputs, and we present the quark distributions in the proton correspondingly. We also discuss how to extend the framework to accommodate more off-forward constraints beyond the small ξ expansion, especially the lattice calculated GPDs.

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Deeply virtual Compton scattering cross section at high Bjorken $x_B$

Cited by 6 publications

References 27 publications

Twist-three cross-sections in deeply virtual Compton scattering

Twist-three cross-sections in deeply virtual Compton scattering

Benchmarks for a Global Extraction of Information from Deeply Virtual Exclusive Scattering

Generalized parton distributions through universal moment parameterization: non-zero skewness case

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