Unusual Z sup 0 decays in supersymmetry with a superlight gravitino

Journal Article · Wed May 01 00:00:00 EDT 1991 · Physical Review, D (Particles Fields); (USA)

DOI:https://doi.org/10.1103/PhysRevD.43.2951· OSTI ID:5465206

Dicus, D A ^[1]; Nandi, S; Woodside, J ^[2]

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1. Center for Particle Theory, The University of Texas, Austin, Texas 78712 (USA)
2. Department of Physics, Oklahoma State University, Stillwater, Oklahoma 74078 (USA)

Supergravity theory with a superlight gravitino (of mass {similar to}{ital m}{sub {ital W}}{sup 2}{ital M}{sub Pl}{sup {minus}1}) leads to many interesting {ital Z}{sup 0} decay modes which are not present in the standard model or in the usual supergravity theory. We discuss the signals associated with two such decay modes, {ital Z}{sup 0}{r arrow}{ital Sf{bar f}},{ital Pf{bar f}}, where {ital S} ({ital P}) is a massless scalar (pseudoscalar) particle present in this theory, and {ital f} is a quark or a lepton. Lack of observation of this mode in the current measurements at the CERN {ital e}{sup +}{ital e{minus}} collider LEP leads to a lower bound on the gravitino mass of 10{sup {minus}14} GeV. Such decays will be observable with 10{sup 6} {ital Z}{sup 0}'s at LEP if the gravitino mass is less than 10{sup {minus}13} GeV.

• DOE Contract Number: FG05-85ER40200; FG05-85ER40215
• OSTI ID: 5465206
• Journal Information: Physical Review, D (Particles Fields); (USA), Vol. 43:9; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Z NEUTRAL BOSONS
DECAY
MASS
SUPERGRAVITY
SUPERSYMMETRY
BOSONS
ELEMENTARY PARTICLES
FIELD THEORIES
INTERMEDIATE BOSONS
INTERMEDIATE VECTOR BOSONS
SYMMETRY
UNIFIED-FIELD THEORIES
645203* - High Energy Physics- Particle Interactions & Properties-Theoretical- Weak Interactions & Properties
645300 - High Energy Physics- Particle Invariance Principles & Symmetries