Revealing Color Forces with Transverse Polarized Electron Scattering

Armstrong, W.; Kang, H.; Liyanage, A.; Maxwell, J.; Mulholland, J.; Ndukum, L.; Ahmidouch, A.; Albayrak, I.; Asaturyan, A.; Ates, O.; Baghdasaryan, H.; Boeglin, W.; Bosted, P.; Brash, E.; Butuceanu, C.; Bychkov, M.; Carter, P.; Chen, C.; Chen, J. -P.; Choi, S.; Christy, M. E.; Covrig, S.; Crabb, D.; Danagoulian, S.; Daniel, A.; Davidenko, A. M.; Davis, B.; Day, D.; Deconinck, W.; Deur, A.; Dunne, J.; Dutta, D.; El Fassi, L.; Ellis, C.; Ent, R.; Flay, D.; Frlez, E.; Gaskell, D.; Geagla, O.; German, J.; Gilman, R.; Gogami, T.; Gomez, J.; Goncharenko, Y. M.; Hashimoto, O.; Higinbotham, D.; Horn, T.; Huber, G. M.; Jones, M.; Jones, M. K.; Kalantarians, N.; Kang, H-K.; Kawama, D.; Keith, C.; Keppel, C.; Khandaker, M.; Kim, Y.; King, P. M.; Kohl, M.; Kovacs, K.; Kubarovsky, V.; Li, Y.; Liyanage, N.; Luo, W.; Mack, D.; Mamyan, V.; Markowitz, P.; Maruta, T.; Meekins, D.; Melnik, Y. M.; Meziani, Z. -E.; Mkrtchyan, A.; Mkrtchyan, H.; Mochalov, V. V.; Monaghan, P.; Narayan, A.; Nakamura, S. N.; Nuruzzaman, A.; Pentchev, L.; Pocanic, D.; Posik, M.; Puckett, A.; Qiu, X.; Reinhold, J.; Riordan, S.; Roche, J.; Rondón, O. A.; Sawatzky, B.; Shabestari, M.; Slifer, K.; Smith, G.; Soloviev, L. F.; Solvignon, P.; Tadevosyan, V.; Tang, L.; Vasiliev, A. N.; Veilleux, M.; Walton, T.; Wesselmann, F.; Wood, S.; Yao, H.; Ye, Z.; Zhang, J.; Zhu, L.

doi:10.1103/PhysRevLett.122.022002

Title: Revealing Color Forces with Transverse Polarized Electron Scattering

Journal Article · Fri Jan 18 00:00:00 EST 2019 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.122.022002· OSTI ID:1501865

Armstrong, W.; Kang, H.; Liyanage, A.; Maxwell, J.; Mulholland, J.; Ndukum, L.; Ahmidouch, A.; Albayrak, I.; Asaturyan, A.; Ates, O.; Baghdasaryan, H.; Boeglin, W.; Bosted, P.; Brash, E.; Butuceanu, C.; Bychkov, M.; Carter, P.; Chen, C.; Chen, J. -P.; Choi, S. more »

The Spin Asymmetries of the Nucleon Experiment measured two double spin asymmetries using a polarized proton target and polarized electron beam at two beam energies, 4.7 and 5.9 GeV. A large acceptance open-configuration detector package identified scattered electrons at 40° and covered a wide range in Bjorken $$\mathcal{x}$$ (0.3< $$\mathcal{x}$$ <0.8). Proportional to an average color Lorentz force, the twist-3 matrix element, $$\tilde{d}$$$$p\atop{2}$$, was extracted from the measured asymmetries at Q² values ranging from 2.0 to 6.0 GeV². The data display the opposite sign compared to most quark models, including the lattice QCD result, and an unexpected scale dependence. Moreover, when combined with the neutron data in the same Q² range the results suggest a flavor independent average color Lorentz force.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Mississippi State Univ., Mississippi State, MS (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: SANE Collaboration

Grant/Contract Number:: AC02-06CH11357; FG02-94ER4084; FG02-96ER40950; AC05-06OR23177; FG02-07ER41528

OSTI ID:: 1501865

Alternate ID(s):: OSTI ID: 1491283; OSTI ID: 1574226; OSTI ID: 1599201

Report Number(s):: JLAB-PHY-19-2886; DOE/OR/23177-4831; arXiv:1805.08835; 144321

Journal Information:: Physical Review Letters, Vol. 122, Issue 2; ISSN 0031-9007

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 15 works

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