Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target

Pisano, S.; Biselli, A. S.; Niccolai, S.; Seder, E.; Guidal, M.; Mirazita, M.; Adhikari, K. P.; Adikaram, D.; Amaryan, M. J.; Pereira, S. Anefalos; Avakian, H.; Ball, J.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Bosted, P.; Briscoe, B.; Brock, J.; Brooks, W. K.; Burkert, Volker; Carlin, C.; Carman, D. S.; Celentano, A.; Chandavar, S.; Charles, G.; Colaneri, L.; Cole, P. L.; Compton, N.; Contalbrigo, M.; Cortes, O.; Crabb, D.; Credé, V.; D’Angelo, A.; Vita, R. De; Sanctis, E. De; Deur, A.; Djalali, C.; Dupré, R.; Egiyan, H.; Alaoui, A. El; Fassi, L. El; Elouadrhiri, L.; Eugenio, P.; Fedotov, G.; Fegan, S.; Fersch, R.; Filippi, A.; Fleming, J. A.; Fradi, A.; Garillon, B.; Garçon, M.; Ghandilyan, Y.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Goetz, J. T.; Gohn, W.; Golovatch, E.; Gothe, R.; Griffioen, K. A.; Guo, L.; Hafidi, K.; Hanretty, C.; Hattawy, M.; Hicks, K.; Holtrop, M.; Hughes, S. M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Jenkins, D.; Jiang, X.; Jo, H. S.; Joo, K. S.; Joosten, S.; Keith, C.; Keller, D.; Kim, A.; Kim, W.; Klein, F. J.; Kubarovsky, V.; Kuhn, S. E.; Lenisa, P.; Livingston, K.; Lu, H. Y.; MacCormick, M.; MacGregor, I. J. D.; Mayer, M.; McKinnon, B.; Meekins, D.; Meyer, C. A.; Mokeev, V.; Montgomery, R. A.; Moody, C. I.; Camacho, C. Muñoz; Nadel-Turoński, P.; Osipenko, M.; Ostrovidov, A. I.; Park, K.; Phelps, W.; Phillips, J. J.; Pogorelko, O.; Price, J. W.; Procureur, S.; Prok, Y.; Puckett, A. J. R.; Ripani, M.; Rizzo, A.; Rosner, G.; Rossi, P.; Roy, P.; Sabatié, F.; Salgado, C.; Schott, D.; Schumacher, R. A.; Skorodumina, Iu.; Smith, G. D.; Sober, D. I.; Sokhan, D.; Sparveris, N.; Stepanyan, S.; Stoler, P.; Strauch, S.; Sytnik, V.; Tian, Ye; Tkachenko, S.; Turisini, Matteo; Ungaro, M.; Voutier, E.; Walford, N. K.; Watts, D. P.; Wei, X.; Weinstein, Larry; Wood, M. H.; Zachariou, N.; Zana, L.; Zhang, J.; Zhao, Z. W.; Zonta, I.

doi:10.1103/physrevd.91.052014

Cited by 57 publications

(39 citation statements)

References 47 publications

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“…12: Comparison between the results of this analysis, the selected GPD models and experimental data published by CLAS in Refs. [51,52] for d 4 σ − U U at x Bj = 0.244, t = −0.15 GeV 2 and Q 2 = 1.79 GeV 2 (left) and for A − U L at x Bj = 0.2569, t = −0.23 GeV 2 , Q 2 = 2.019 GeV 2 (right). The gray bands correspond to the results of this analysis with 68% confidence level for the uncertainties coming from DVCS data, respectively.…”

Section: Discussionmentioning

confidence: 99%

Unbiased determination of DVCS Compton form factors

2019

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The extraction of Compton Form Factors (CFFs) in a global analysis of almost all Deeply Virtual Compton Scattering (DVCS) proton data is presented. The extracted quantities are DVCS subamplitudes and the most basic observables which are unambiguously accessible from this process. The parameterizations of CFFs are constructed utilizing the artificial neural network technique allowing for an important reduction of model dependency. The analysis consists of such elements as feasibility studies, training of neural networks with the genetic algorithm and a careful regularization to avoid over-fitting. The propagation of experimental uncertainties to extracted quantities is done with the replica method. The resulting parameterizations of CFFs are used to determine the subtraction constant through dispersion relations. The analysis is done within the PARTONS framework.

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Section: Discussionmentioning

confidence: 99%

Unbiased determination of DVCS Compton form factors

2019

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“…The ratio of the corresponding volumes of baryon no. and isoscalar charge distributions, Empirical tests delineating the size scale of the nucleon core begin to be accessible in deeply-virtual Compton scattering experiments at J-Lab and their theoretical analysis [7][8][9]. An interesting development in this respect is the measurement of form factors of the nucleon's energy momentum tensor (see also the presentation by B. Pasquini at QNP2018).…”

Section: From Nucleons To Compressed Baryonic Mattermentioning

confidence: 99%

Dense Baryonic Matter and Strangeness in Neutron Stars

Weise

2019

Proceedings of the 8th International Conference on Quarks and Nuclear Physics (QNP2018)

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Recent developments of chiral effective field theory (ChEFT) applications to nuclear and neutron matter are summarized, with special emphasis on a (non-perturbative) extension using functional renormalisation group methods. Topics include: nuclear thermodynamics, extrapolations to dense baryonic matter and constraints from neutron star observables. Hyperon-nuclear interactions derived from SU(3) will be discussed with reference to the "hyperon puzzle" in neutron star matter.

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“…where φ is the angle between the lepton plane and the production plane, the arrows denote the helicity and the minus sign the charge of the beam 3 . The JLab kinematics chosen are part of a set of data published by the CLAS collaboration [22]. We do not say anything about the accuracy of this specific model here, as our present goal is only to illustrate this procedure.…”

Section: Phenomenology Of Quark Modelsmentioning

confidence: 99%

Phenomenology with the PARTONS software of Generalized Parton Distribution models built from Light-Front Wave-functions

Chouika¹

2018

Proceedings of XXVI International Workshop on Deep-Inelastic Scattering and Related Subjects — PoS(DIS2018)

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We present a procedure aiming at extending to the full kinematic domain a Generalized Parton Distribution obtained from a finite order truncation in Fock space. This method allows to fulfill both polynomiality and positivity at the same time and can be applied to any given models of Light-front wave-functions. In particular, we illustrate this on a three-body truncated wavefunction of the chiral quark soliton model and show how a systematic phenomenology of GPD models based on LFWFs can be achieved with the help of the PARTONS framework, here using DVCS data. This paves the way for a unified phenomenology of GPDs and TMDs at the level of LFWFs, with the final goal of hadron tomography.

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Single and double spin asymmetries for deeply virtual Compton scattering measured with CLAS and a longitudinally polarized proton target

Cited by 57 publications

References 47 publications

Unbiased determination of DVCS Compton form factors

Unbiased determination of DVCS Compton form factors

Dense Baryonic Matter and Strangeness in Neutron Stars

Phenomenology with the PARTONS software of Generalized Parton Distribution models built from Light-Front Wave-functions

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