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Title: TeV-scale stringy signatures at the electron-positron collider

Abstract

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.

Authors:
 [1]
  1. Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)
Publication Date:
OSTI Identifier:
20776893
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 73; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevD.73.055006; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ASYMMETRY; BOSONS; CHIRALITY; COLLIDING BEAMS; CORRECTIONS; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; GEV RANGE; GRAVITONS; KALUZA-KLEIN THEORY; POLARIZED BEAMS; POSITRONS; QUARKS; SCATTERING; SPIN; STANDARD MODEL; STRING MODELS; TEV RANGE

Citation Formats

Burikham, Piyabut. TeV-scale stringy signatures at the electron-positron collider. United States: N. p., 2006. Web. doi:10.1103/PhysRevD.73.055006.
Burikham, Piyabut. TeV-scale stringy signatures at the electron-positron collider. United States. doi:10.1103/PhysRevD.73.055006.
Burikham, Piyabut. Wed . "TeV-scale stringy signatures at the electron-positron collider". United States. doi:10.1103/PhysRevD.73.055006.
@article{osti_20776893,
title = {TeV-scale stringy signatures at the electron-positron collider},
author = {Burikham, Piyabut},
abstractNote = {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.},
doi = {10.1103/PhysRevD.73.055006},
journal = {Physical Review. D, Particles Fields},
number = 5,
volume = 73,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2006},
month = {Wed Mar 01 00:00:00 EST 2006}
}