Letter of Intent for a Drell-Yan experiment with a polarized proton target
2023
Citations Over Time
A. Klein, X. Jiang, D. Gessaman, P. E. Reimer, C. N. Brown, Christian Fuchs, Markus Diefenthaler, J.-C. Peng, W. C. Chang, Y.-C. Chen, S. Sawada, Tung‐Zong Chang, J. Huang, X. Jiang, M. J. Leitch, A. Klein, Kun Liu, M. X. Liu, P. McGaughey, E. J. Beise, K. Nakahara, C. Aidala, W. Lorenzon, R. Raymond, T. Badman, E. Long, K. Slifer, R. Zielinski, R.-S. Guo, Y. Goto, L. El Fassi, K. Meyers, R. D. Ransome, A.S. Tadepalli, B. G. Tice, Jun-Xia Chen, K. Nakano, T.-A. Shibata, Donald G. Crabb, Donal B. Day, D. M. Keller, O. Rondon
Abstract
It is well known that the proton is a spin-1/2 particle, but how the constituents (quarks and gluons) assemble to this quantized spin is still a mystery. There is a worldwide effort to map out the individual contributions to the proton spin. It is established that the quark spins contribute around 30%, while the gluon intrinsic angular momentum is still under active investigation at the Relativistic Heavy Ion Collider. Fully resolving the proton spin puzzle requires information on the orbital angular momentum (OAM) of both quarks and gluons. Recent studies have shown that the so-called transverse momentum dependent parton distribution functions (TMDs) can inform us about the OAM of the partons.
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