2006/01/31 by Piyabut Burikham
Physics and Astronomy · #Asymmetry #Black Holes and Theoretical Physics #Boson #Collider #Cosmology and Gravitation Theories #Extra dimensions #Fermion #Gauge (firearms) #Gauge boson #Gauge theory #Gravitation #Graviton #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum mechanics #Scattering #Standard Model (mathematical formulation) #String (physics) #Theoretical physics #hep-ph
paper · pdf · doi:10.1103/physrevd.73.055006
published as Phys.Rev. D73 (2006) 055006 · 22 pages,8 figures, expanded content, added references
arxiv created 2006/02/28 · openalex publication_date 2006/03/15 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We investigate the TeV-scale stringy signals of the four-fermion scattering at the electron-positron collider with the center-of-mass energy 500--1000 GeV. The nature of the stringy couplings leads to distinguishable asymmetries comparing to the other new physics models. Specifically, the stringy states in the four-fermion scattering at the leading-order corrections are of spin-1 and 2 with the chiral couplings inherited from the gauge bosons identified as the zeroth-mode string states. The angular left-right, forward-backward, center-edge asymmetries, and the corresponding polarized-beam asymmetries are investigated. The low-energy stringy corrections are compared to the ones induced by the Kaluza-Klein (KK) gravitons. The angular left-right asymmetry of the scattering with the final states of u and d-type quarks, namely c and b, shows significant deviations from the standard model values. The center-edge and forward-backward asymmetries for all final-states fermions also show significant deviations from the corresponding standard model values. The differences between the signatures induced by the stringy corrections and the KK gravitons are appreciable in both angular left-right and forward-backward asymmetries.