Discovery potential of radiative neutralino production at the ILC

Journal Article · Fri Dec 01 04:00:00 EST 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.115010· OSTI ID:20868130

Dreiner, Herbi K; Kittel, Olaf; Langenfeld, Ulrich ^[1]

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1. Physikalisches Institut der Universitaet Bonn, Nussallee 12, 53115 Bonn (Germany)

We study radiative neutralino production e{sup +}e{sup -}{yields}{chi}-tilde{sub 1}{sup 0}{chi}-tilde{sub 1}{sup 0}{gamma} at the linear collider with longitudinally polarized beams. We consider the standard model background from radiative neutrino production e{sup +}e{sup -}{yields}{nu}{nu}{gamma}, and the supersymmetric radiative production of sneutrinos e{sup +}e{sup -}{yields}{nu}-tilde{nu}-tilde*{gamma}, which can be a background for invisible sneutrino decays. We give the complete tree-level formulas for the amplitudes and matrix elements squared. In the minimal supersymmetric standard model, we study the dependence of the cross sections on the beam polarizations, on the parameters of the neutralino sector, and on the selectron masses. We show that for b-inolike neutralinos longitudinal polarized beams enhance the signal and simultaneously reduce the background, such that statistics is significantly enhanced. We point out that there are parameter regions where radiative neutralino production is the only channel to study SUSY particles, since heavier neutralinos, charginos and sleptons are too heavy to be pair-produced in the first stage of the linear collider with {radical}(s)=500 GeV.

• OSTI ID: 20868130
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 11 Vol. 74; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
GEV RANGE
LINEAR COLLIDERS
MATRIX ELEMENTS
PAIR PRODUCTION
PARTICLE DECAY
PARTICLE IDENTIFICATION
POLARIZATION
POLARIZED BEAMS
REST MASS
SPARTICLES
STANDARD MODEL
STATISTICS
SUPERSYMMETRY