Probing slepton mass nonuniversality at e{sup +}e{sup -} linear colliders
There are many models with nonuniversal soft SUSY breaking sfermion mass parameters at the grand unification scale. Even in the MSUGRA model scalar mass unification might occur at a scale closer to M{sub Planck}, and renormalization effects would cause a mass splitting at M{sub GUT}. We identify an experimentally measurable quantity {Delta} that correlates strongly with {delta}m{sup 2}(equivalent to)m{sub {tilde e}{sub R}}{sup 2}(M{sub GUT})-m{sub {tilde e}{sub L}}{sup 2}(M{sub GUT}), and which can be measured at electron-positron colliders provided both selectrons and the chargino are kinematically accessible. We show that if these sparticle masses can be measured with a precision of 1% at a 500 GeV linear collider, the resulting precision in the determination of {Delta} may allow experiments to distinguish between scalar mass unification at the GUT scale from the corresponding unification at Q{approx}M{sub Planck}. Experimental determination of {Delta} would also provide a distinction between the MSUGRA model and the recently proposed gaugino-mediation model. Moreover, a measurement of {Delta} (or a related quantity {Delta}{prime}) would allow for a direct determination of {delta}m{sup 2}.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205121
- Journal Information:
- Physical Review D, Vol. 63, Issue 9; Other Information: DOI: 10.1103/PhysRevD.63.095008; Othernumber: PRVDAQ000063000009095008000001; 003111PRD; PBD: 1 May 2001; ISSN 0556-2821
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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