Abstract
The theory of symplectic scalar fermion of LeClair and Neubert is studied. The theory evades the conventional spin-statistics theorem because its Hamiltonian is pseudo Hermitian. The definition of pseudo Hermiticity is examined in the interacting and the Heisenberg picture. For states that evolve under pseudo Hermitian Hamiltonians, we define the appropriate inner-product and matrix element of operators that preserve time translation symmetry. The resulting S-matrix is shown to satisfy the generalized unitarity relation. We clarify the derivation of the symplectic currents and charges. By demanding the currents and charges to be pseudo Hermitian, the global symmetry of the free Lagrangian density reduces from Sp(2, ℂ) to SU(2). By explicit calculations, we show that the LeClair-Neubert model of N quartic self-interacting scalar fermions admits generalized unitary evolution.
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Acknowledgments
I am grateful to Dharam Vir Ahluwalia for constant discussions and encouragements. I would like to thank James Brister, Ting-Long Feng, Suro Kim, Lei-Hua Liu, Guo-En Nian, Zheng Sun, Han Yan, Wenqi Yu, Cong Zhang and Siyi Zhou discussions. This work supported by The Sichuan University Post-doctoral Research Fund No. 2022SCU12119.
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Lee, CY. Generalized unitary evolution for symplectic scalar fermions. J. High Energ. Phys. 2024, 181 (2024). https://doi.org/10.1007/JHEP05(2024)181
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DOI: https://doi.org/10.1007/JHEP05(2024)181