R-parity violation and the new events at HERA

Journal Article · Sun Apr 20 04:00:00 EDT 1997 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.53602· OSTI ID:21167550

Lola, Smaragda ^[1]

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1. Theory Division, CERN, CH-1211, Geneva 23 (Switzerland)

We summarize possible explanations of the HERA large-Q{sup 2} data, in the framework of R-parity violating supersymmetry. Experimental limits indicate that the most likely production channels are e{sup +}d{yields}c-tilde{sub L}, e{sup +}d{yields}t-tilde{sub L} and e{sup +}s{yields}t-tilde{sub L}. We study the regions of the parameter space that lead to consistent branching ratios, with and without gaugino unification. Cancellations in the coupling of the lightest neutralino to c-tilde{sub L}, result in a balance between R-parity violating and R-parity conserving decay modes. Such cancellations are not present in the coupling of the neutralino with other particles and an interesting case is {nu}-tilde{sub L}, which could be produced at LEP2 via an L{sub 1}L{sub 2,3}E-tilde{sub 1} operator. On the other hand, the t-tilde{sub L} branching ratios depend mainly on the mass of the lightest chargino and tend to be dominated by either the R-conserving or the R-violating mode.

• OSTI ID: 21167550
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 407; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
COUPLING
DEUTERIUM TARGET
FOUR MOMENTUM TRANSFER
HERA STORAGE RING
PARITY
PARTICLE IDENTIFICATION
PARTICLE PRODUCTION
POSITRON REACTIONS
POSITRONS
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY BREAKING