Associated production of a graviton with an e{sup +}e{sup -} pair via photon-photon collisions at a linear collider
- Department of Modern Physics, University of Science and Technology of China (USTC), Hefei, Anhui 230026 (China)
We investigate the process {gamma}{gamma}{yields}e{sup +}e{sup -}G{sub n} at the future International Linear Collider (ILC), where G{sub n} is the Kaluza-Klein graviton in the large extra dimension model. When the fundamental energy scale is of a few TeV, the cross section of this process can reach several hundred fb at a photon-photon collider with {radical}(s)=500-1000 GeV, and the cross section in the J=2 polarized photon collision mode is much larger than that in the J=0 polarized photon collision mode. We present strategies to distinguish the graviton signal from numerous SM backgrounds, and find that the graviton signal with extra dimensions {delta}=3 can be detected when M{sub S}{<=}2.67(1.40) TeV and {gamma}{gamma} center of mass system energy {radical}(s)=1000(500) GeV in unpolarized photon collision mode, while the detecting upper limit can be increased to 2.79(1.44) TeV in +- ({lambda}{sub 1}=1, {lambda}{sub 2}=-1) polarized photon collision mode (with photon polarization efficiency P{sub {gamma}}=0.9)
- OSTI ID:
- 21027686
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 76, Issue 5; Other Information: DOI: 10.1103/PhysRevD.76.054003; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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