Longitudinal Target-Spin Asymmetries for Deeply Virtual Compton Scattering

Seder, E.; Biselli, A.; Pisano, S.; Niccolai, S.; Smith, G. D.; Joo, K. S.; Adhikari, K. P.; Amaryan, M. J.; Pereira, S. Anefalos; Avakian, H.; Battaglieri, M.; Bedlinskiy, I.; Bono, J.; Boiarinov, S.; Bosted, P.; Briscoe, W. J.; Brock, J.; Brooks, W. K.; Bültmann, S.; Burkert, Volker; Carman, D. S.; Carlin, C.; Celentano, A.; Chandavar, S.; Charles, G.; Colaneri, L.; Cole, P. L.; Contalbrigo, M.; Crabb, D.; Credé, V.; D’Angelo, A.; Dashyan, N.; Vita, R. De; Sanctis, E. De; Deur, A.; Djalali, C.; Doughty, D.; Dupré, R.; Fassi, L. El; Elouadrhiri, L.; Eugenio, P.; Fedotov, G.; Fegan, S.; Filippi, A.; Fleming, J. A.; Fradi, A.; Garillon, B.; Garçon, M.; Gevorgyan, N.; Ghandilyan, Y.; Giovanetti, K. L.; Girod, F. X.; Goetz, J. T.; Gohn, W.; Gothe, R.; Griffioen, K. A.; Guegan, B.; Guidal, M.; Guo, L.; Hafidi, K.; Hakobyan, H.; Hanretty, C.; Harrison, N.; Hattawy, M.; Saylor, N. Hirlinger; Holtrop, M.; Hughes, S. M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jo, H. S.; Joosten, S.; Keith, C.; Keller, D.; Khachatryan, G.; Khandaker, M.; Kim, A; Kim, W; Klein, A.; Klein, F. J.; Koirala, S.; Kubarovsky, V.; Kuhn, S. E.; Lenisa, P.; Livingston, K.; Lu, H. Y.; MacGregor, I. J. D.; Markov, N.; Mayer, Martin; McKinnon, B.; Meekins, D.; Mineeva, T.; Mirazita, M.; Mokeev, V.; Montgomery, R. A.; Moody, C. I.; Moutarde, H.; Movsisyan, A.; Camacho, C. Muñoz; Nadel-Turoński, P.; Niculescu, I.; Osipenko, M.; Ostrovidov, A. I.; Paolone, M.; Pappalardo, L. L.; K, Park; Park, S; Pasyuk, E.; Peng, P.; Phelps, W.; Pogorelko, O.; Price, J. W.; Prok, Y.; Protopopescu, D.; Puckett, A. J. R.; Ripani, M.; Rizzo, A.; Rosner, G.; Rossi, P.; Roy, P.; Sabatié, F.; Salgado, C.; Schott, D.; Schumacher, R. A.; Senderovich, I.; Simonyan, A.; Skorodumina, Iu.; Sokhan, D.; Sparveris, N.; Stepanyan, S.; Stoler, P.; Strakovsky, I. I.; Strauch, S.; Sytnik, V.; Taiuti, M.; Tang, W.; Tian, Ye; Ungaro, M.; Voskanyan, H.; Voutier, E.; Walford, N. K.; Watts, D. P.; Wei, X.; Weinstein, L. B.; Wood, M. H.; Zachariou, N.; Zana, L.; Zhang, J; Zonta, I.

doi:10.1103/physrevlett.114.032001

Cited by 47 publications

(10 citation statements)

References 34 publications

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“…A subsequent JLab Hall A experiment is analyzing the beam energy dependence of the DVCS cross section [31,32]. Beam-spin and longitudinal target spin asymmetries in the valence region were measured in CLAS [33][34][35][36]. Extensive DVCS data taking has now started with the JLab upgrade [37].…”

Section: Figmentioning

confidence: 99%

E00-110 experiment at Jefferson Lab Hall A: Deeply virtual Compton scattering off the proton at 6 GeV

Defurne¹,

Amaryan²,

Aniol³

et al. 2015

Phys. Rev. C

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2We present final results on the photon electroproduction ( ep → epγ) cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region from Jefferson Lab experiment E00-110. Results from an analysis of a subset of these data were published before, but the analysis has been improved which is described here at length, together with details on the experimental setup. Furthermore, additional data have been analyzed resulting in photon electroproduction cross sections at new kinematic settings, for a total of 588 experimental bins. Results of the Q 2 -and xB-dependences of both the helicity-dependent and helicity-independent cross sections are discussed. The Q 2 -dependence illustrates the dominance of the twist-2 handbag amplitude in the kinematics of the experiment, as previously noted. Thanks to the excellent accuracy of this high luminosity experiment, it becomes clear that the unpolarized cross section shows a significant deviation from the Bethe-Heitler process in our kinematics, compatible with a large contribution from the leading twist-2 DVCS 2 term to the photon electroproduction cross section. The necessity to include higher-twist corrections in order to fully reproduce the shape of the data is also discussed. The DVCS cross sections in this paper represent the final set of experimental results from E00-110, superseding the previous publication.

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Section: Figmentioning

confidence: 99%

E00-110 experiment at Jefferson Lab Hall A: Deeply virtual Compton scattering off the proton at 6 GeV

Defurne¹,

Amaryan²,

Aniol³

et al. 2015

Phys. Rev. C

Self Cite

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“…Using a simple phenomenological Ansatz for the corresponding partial wave amplitudes allows to construct a flexible Kumerički-Müller (KM) GPD model [34][35][36] that provides a good description of the world sets of unpolarized DVCS data [37], including small-x B DVMP data [38]. This model provides also a reasonable description of the polarized DVCS data [39,40].…”

Section: Jhep03(2015)052mentioning

confidence: 99%

Dual parametrization of generalized parton distributions in two equivalent representations

Müller

Polyakov

Semenov-Tian-Shansky

2015

J. High Energ. Phys.

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Abstract:The dual parametrization and the Mellin-Barnes integral approach represent two frameworks for handling the double partial wave expansion of generalized parton distributions (GPDs) in the conformal partial waves and in the t-channel SO(3) partial waves. Within the dual parametrization framework, GPDs are represented as integral convolutions of forward-like functions whose Mellin moments generate the conformal moments of GPDs. The Mellin-Barnes integral approach is based on the analytic continuation of the GPD conformal moments to the complex values of the conformal spin. GPDs are then represented as the Mellin-Barnes-type integrals in the complex conformal spin plane. In this paper we explicitly show the equivalence of these two independently developed GPD representations. Furthermore, we clarify the notions of the J = 0 fixed pole and the D-form factor. We also provide some insight into GPD modeling and map the phenomenologically successful Kumerički-Müller GPD model to the dual parametrization framework by presenting the set of the corresponding forward-like functions. We also build up the reparametrization procedure allowing to recast the double distribution representation of GPDs in the Mellin-Barnes integral framework and present the explicit formula for mapping double distributions into the space of double partial wave amplitudes with complex conformal spin.

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“…Later in 2009 the E05-114 experiment measured beam-spin, target-spin, and double-spin asymmetries for a polarized beam on a longitudinally polarized N H 3 target. The relevant references for the CLAS DVCS experiments can be found in [41] [42] [43] [44] and [45].…”

Section: Clasmentioning

confidence: 99%

Deeply Virtual Compton Scattering on the Proton in Hall A at Jefferson Lab

Johnson

2020

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I first and foremost need to express my appreciation and gratitude to my advisor Gregg Franklin, without whom this thesis would not have been possible. I could not have hoped for a more supportive and understanding advisor to help me achieve this goal, especially under the unusual circumstance of finishing this degree out of state. Gregg spared no time nor effort (even while on his retirement RV trips) to help improve this document, and me as a physicist. I am lucky to have had the opportunity to work with Gregg.Second, I need to express my love and thanks to my family. I experienced what was the biggest personal difficulty in my life while in the middle of this degree, and without the support and love from my parents, sisters, uncles, aunts, and cousins, this thesis may not have been possible.Next, I would like to thank the DVCS collaboration. Julie Roche and Carlos Munoz Camacho were extremely helpful in helping me understand DVCS and the analysis needed to produce this thesis. Maxime Defurne especially fielded many of my emails, and also spared no effort in responding with helpful advice and knowledge. I have also greatly enjoyed working with my fellow PhD students in the collaboration, Frederic Georges, Bishnu Karki, Salina Ali, Mongi Dlamini, and Hashir Rashad. I'd like to thank especially Bishnu for being so helpful with the troubling DIS analysis, and Hashir for being such a help with debugging problems with my DVCS fitting scripts.I would like to thank all of my colleagues and friends from Carnegie Mellon. I am especially grateful to Larisa Thorne, with whom I shared the adventure of living in Newport News, VA and taking shifts at Jefferson Lab (before she abandoned us all for Germany ). It was a pleasure sharing an office with her and Juan Carlos Cornejo, and spending time with the rest of the medium energy grad students and post-docs.I made some of my greatest friends while in graduate school, with some of the brightest and kindest people I have ever met. I enjoyed(?) sharing the dungeon office with Tori Merten and Evan Tucker, and I will never forget our desperate struggles to finish our E&M homework. I am also grateful to Jake Fallica, and the five miserable days we spent trying to figure out what Quantum Optomechanics was, and how we would ever pull off the successful pronunciation of micro-toroidal oscillator. I will never forget the countless nights of playing board games and watching Games of Thrones with these three people and their partners, and their friendship was invaluable during this time in my life. Without their support and friendship, finishing this degree would not have been nearly as happy of a time in my life.

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Longitudinal Target-Spin Asymmetries for Deeply Virtual Compton Scattering

Cited by 47 publications

References 34 publications

E00-110 experiment at Jefferson Lab Hall A: Deeply virtual Compton scattering off the proton at 6 GeV

E00-110 experiment at Jefferson Lab Hall A: Deeply virtual Compton scattering off the proton at 6 GeV

Dual parametrization of generalized parton distributions in two equivalent representations

Deeply Virtual Compton Scattering on the Proton in Hall A at Jefferson Lab

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