Ultrarelativistic quark-nucleus scattering in a light-front Hamiltonian approach
Li, M., Zhao, X., Maris, P., Chen, G., Li, Y., Tuchin, K., & Vary, J. P. (2020). Ultrarelativistic quark-nucleus scattering in a light-front Hamiltonian approach. Physical Review D, 101(7), Article 076016. https://doi.org/10.1103/PhysRevD.101.076016
Published inPhysical Review D
Li, Yang |
© 2020 American Physical Society
We investigate the scattering of a quark on a heavy nucleus at high energies using the time-dependent basis light-front quantization (tBLFQ) formalism, which is the first application of the tBLFQ formalism in QCD. We present the real-time evolution of the quark wave function in a strong classical color field of the relativistic nucleus, described as the color glass condensate. The quark and the nucleus color field are simulated in the QCD SU(3) color space. We calculate the total and the differential cross sections, and the quark distribution in coordinate and color spaces using the tBLFQ approach. We recover the eikonal cross sections in the eikonal limit. We find that the differential cross section from the tBLFQ simulation is in agreement with a perturbative calculation at large p⊥, and it deviates from the perturbative calculation at small p⊥ due to higher-order contributions. In particular, we relax the eikonal limit by letting the quark carry realistic finite longitudinal momenta. We study the sub-eikonal effect on the quark through the transverse coordinate distribution of the quark with different longitudinal momentum, and we find the sub-eikonal effect to be sizable. Our results can significantly reduce the theoretical uncertainties in small p⊥ region which has important implications to the phenomenology of the hadron-nucleus and deep inelastic scattering at high energies. ...
PublisherAmerican Physical Society
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Related funder(s)European Commission
The content of the publication reflects only the author’s view. The funder is not responsible for any use that may be made of the information it contains.
Additional information about fundingX. Zhao is supported by Key Research Program ofFrontier Sciences, CAS, Grant No. ZDBS-LY-7020. Thiswork was supported in part by the U.S. Department ofEnergy (DOE) under Grants No. DE-FG02-87ER40371,No. DE-SC0018223 (SciDAC-4/NUCLEI), No. DE-SC0015376 (DOE Topical Collaboration in NuclearTheory for Double-Beta Decay and FundamentalSymmetries). This research used resources of theNational Energy Research Scientific Computing Center(NERSC), a U.S. Department of Energy Office of ScienceUser Facility operated under Contract No. DE-AC02-05CH11231. This work has been supported in part bythe European Research Council (ERC) under the EuropeanUnion’s Horizon 2020 research and innovation programme(Grant agreement No ERC-2015-CoG-681707). ...
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