Probing slepton mass nonuniversality at e{sup +}e{sup -} linear colliders

Journal Article · Tue May 01 04:00:00 EDT 2001 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.63.095008· OSTI ID:40205121

Baer, Howard; Balazs, Csaba; Hesselbach, Stefan; Mizukoshi, J Kenichi; Tata, Xerxes

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, Journal Name: Physical Review D Journal Issue: 9 Vol. 63; ISSN 0556-2821
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
LINEAR COLLIDERS
RENORMALIZATION
SCALARS
SPARTICLES